├── .gitignore ├── .mvn └── wrapper │ ├── MavenWrapperDownloader.java │ ├── maven-wrapper.jar │ └── maven-wrapper.properties ├── README.md ├── mvnw ├── mvnw.cmd ├── pom.xml └── src ├── main ├── java │ └── com │ │ └── ramostear │ │ └── application │ │ ├── FileHandlingApplication.java │ │ ├── controller │ │ └── FileController.java │ │ ├── model │ │ └── FileInfo.java │ │ └── util │ │ └── FileUtil.java └── resources │ ├── application.properties │ └── templates │ └── files.html └── test └── java └── com └── ramostear └── application └── FileHandlingApplicationTests.java /.gitignore: -------------------------------------------------------------------------------- 1 | HELP.md 2 | /target/ 3 | !.mvn/wrapper/maven-wrapper.jar 4 | 5 | ### STS ### 6 | .apt_generated 7 | .classpath 8 | .factorypath 9 | .project 10 | .settings 11 | .springBeans 12 | .sts4-cache 13 | 14 | ### IntelliJ IDEA ### 15 | .idea 16 | *.iws 17 | *.iml 18 | *.ipr 19 | 20 | ### NetBeans ### 21 | /nbproject/private/ 22 | /nbbuild/ 23 | /dist/ 24 | /nbdist/ 25 | /.nb-gradle/ 26 | /build/ 27 | -------------------------------------------------------------------------------- /.mvn/wrapper/MavenWrapperDownloader.java: -------------------------------------------------------------------------------- 1 | /* 2 | Licensed to the Apache Software Foundation (ASF) under one 3 | or more contributor license agreements. See the NOTICE file 4 | distributed with this work for additional information 5 | regarding copyright ownership. The ASF licenses this file 6 | to you under the Apache License, Version 2.0 (the 7 | "License"); you may not use this file except in compliance 8 | with the License. You may obtain a copy of the License at 9 | 10 | http://www.apache.org/licenses/LICENSE-2.0 11 | 12 | Unless required by applicable law or agreed to in writing, 13 | software distributed under the License is distributed on an 14 | "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 | KIND, either express or implied. See the License for the 16 | specific language governing permissions and limitations 17 | under the License. 18 | */ 19 | 20 | import java.io.File; 21 | import java.io.FileInputStream; 22 | import java.io.FileOutputStream; 23 | import java.io.IOException; 24 | import java.net.URL; 25 | import java.nio.channels.Channels; 26 | import java.nio.channels.ReadableByteChannel; 27 | import java.util.Properties; 28 | 29 | public class MavenWrapperDownloader { 30 | 31 | /** 32 | * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided. 33 | */ 34 | private static final String DEFAULT_DOWNLOAD_URL = 35 | "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.2/maven-wrapper-0.4.2.jar"; 36 | 37 | /** 38 | * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to 39 | * use instead of the default one. 40 | */ 41 | private static final String MAVEN_WRAPPER_PROPERTIES_PATH = 42 | ".mvn/wrapper/maven-wrapper.properties"; 43 | 44 | /** 45 | * Path where the maven-wrapper.jar will be saved to. 46 | */ 47 | private static final String MAVEN_WRAPPER_JAR_PATH = 48 | ".mvn/wrapper/maven-wrapper.jar"; 49 | 50 | /** 51 | * Name of the property which should be used to override the default download url for the wrapper. 52 | */ 53 | private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl"; 54 | 55 | public static void main(String args[]) { 56 | System.out.println("- Downloader started"); 57 | File baseDirectory = new File(args[0]); 58 | System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath()); 59 | 60 | // If the maven-wrapper.properties exists, read it and check if it contains a custom 61 | // wrapperUrl parameter. 62 | File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH); 63 | String url = DEFAULT_DOWNLOAD_URL; 64 | if(mavenWrapperPropertyFile.exists()) { 65 | FileInputStream mavenWrapperPropertyFileInputStream = null; 66 | try { 67 | mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile); 68 | Properties mavenWrapperProperties = new Properties(); 69 | mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream); 70 | url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url); 71 | } catch (IOException e) { 72 | System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'"); 73 | } finally { 74 | try { 75 | if(mavenWrapperPropertyFileInputStream != null) { 76 | mavenWrapperPropertyFileInputStream.close(); 77 | } 78 | } catch (IOException e) { 79 | // Ignore ... 80 | } 81 | } 82 | } 83 | System.out.println("- Downloading from: : " + url); 84 | 85 | File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH); 86 | if(!outputFile.getParentFile().exists()) { 87 | if(!outputFile.getParentFile().mkdirs()) { 88 | System.out.println( 89 | "- ERROR creating output direcrory '" + outputFile.getParentFile().getAbsolutePath() + "'"); 90 | } 91 | } 92 | System.out.println("- Downloading to: " + outputFile.getAbsolutePath()); 93 | try { 94 | downloadFileFromURL(url, outputFile); 95 | System.out.println("Done"); 96 | System.exit(0); 97 | } catch (Throwable e) { 98 | System.out.println("- Error downloading"); 99 | e.printStackTrace(); 100 | System.exit(1); 101 | } 102 | } 103 | 104 | private static void downloadFileFromURL(String urlString, File destination) throws Exception { 105 | URL website = new URL(urlString); 106 | ReadableByteChannel rbc; 107 | rbc = Channels.newChannel(website.openStream()); 108 | FileOutputStream fos = new FileOutputStream(destination); 109 | fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE); 110 | fos.close(); 111 | rbc.close(); 112 | } 113 | 114 | } 115 | -------------------------------------------------------------------------------- /.mvn/wrapper/maven-wrapper.jar: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ramostear/Spring-Boot-File-Handling-Tutorial/177d259c1f1acb4aadef9c109b037cb73667186b/.mvn/wrapper/maven-wrapper.jar -------------------------------------------------------------------------------- /.mvn/wrapper/maven-wrapper.properties: -------------------------------------------------------------------------------- 1 | distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.0/apache-maven-3.6.0-bin.zip 2 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Spring Boot（十一）— 文件上传和下载 2 | 3 | 文件上传和下载是Web应用程序比较常用的功能之一，在本章节中，我将以一个简单的案例来讲解在Spring Boot中如何进行文件的上传与下载。在开始正文之前，我们通过一张思维导图来了解一下文件上传与下载的简单流程： 4 | 5 | ![文件上传与下载思维导图](https://cdn.ramostear.com/2019-03-08-18-22-31-780bd13186fc406db8212e9e87e65d66.png "文件上传与下载思维导图") 6 | 7 | # 1. 文件上传 8 | 9 | 对于文件上传，控制器中对应的上传方法的参数必须是**MultipartFile**对象，**MultipartFile**对象可以是一个数组对象，也可以是单个对象，如果是一个数组对象，则可以进行多文件上传；这里我们仅演示单个文件上传，下面的代码展示了文件上传方法的基本结构： 10 | 11 | ```java 12 | @PostMapping(value = "/upload",consumes = MediaType.MULTIPART_FORM_DATA_VALUE) 13 | @ResponseBody 14 | public String fileUpload(@RequestParam("file") MultipartFile file) throws IOException { 15 | return null; 16 | } 17 | ``` 18 | 19 | 接下来，我们使用**FileOutputStream**对象将客户端上传的文件写入到磁盘中，并返回**“File is upload successfully”**的提示信息，下面是文件上传完整的代码： 20 | 21 | ```java 22 | package com.ramostear.application.controller; 23 | 24 | import com.ramostear.application.model.FileInfo; 25 | import org.springframework.beans.factory.annotation.Value; 26 | import org.springframework.stereotype.Controller; 27 | import org.springframework.web.bind.annotation.*; 28 | import org.springframework.web.multipart.MultipartFile; 29 | 30 | import javax.annotation.PostConstruct; 31 | import java.io.*; 32 | import java.util.HashMap; 33 | import java.util.Map; 34 | 35 | /** 36 | * @author : ramostear 37 | * @date : 2019/3/8 0008-15:35 38 | */ 39 | @Controller 40 | public class FileController { 41 | 42 | 43 | @Value ( "${file.upload.root.dir}" ) 44 | String fileUploadRootDir; 45 | 46 | private static Map fileRepository = new HashMap<>(); 47 | 48 | @PostConstruct 49 | public void initFileRepository(){ 50 | FileInfo file1 = new FileInfo ().setFileName ( "bg1.jpg" ); 51 | FileInfo file2 = new FileInfo ().setFileName ( "bg2.jpg" ); 52 | FileInfo file3 = new FileInfo ().setFileName ( "bg3.jpg" ); 53 | fileRepository.put ( file1.getName (),file1 ); 54 | fileRepository.put ( file2.getName (),file2 ); 55 | fileRepository.put ( file3.getName (),file3 ); 56 | } 57 | 58 | @PostMapping(value = "/upload",consumes = MediaType.MULTIPART_FORM_DATA_VALUE) 59 | @ResponseBody 60 | public String fileUpload(@RequestParam("file") MultipartFile file) throws IOException { 61 | 62 | File convertFile = new File ( fileUploadRootDir+file.getOriginalFilename ()); 63 | FileOutputStream fileOutputStream = new FileOutputStream ( convertFile ); 64 | fileOutputStream.write ( file.getBytes () ); 65 | fileOutputStream.close (); 66 | 67 | FileInfo fileInfo = new FileInfo() 68 | .setFileName ( file.getOriginalFilename()); 69 | 70 | fileRepository.put ( fileInfo.getName (),fileInfo); 71 | 72 | return "File is upload successfully"; 73 | } 74 | } 75 | 76 | ``` 77 | 78 | **fileRepository**用于存放已上传文件的索引信息。 79 | 80 | 81 | 82 | # 2. 文件下载 83 | 84 | 在Spring Boot应用程序中，我们可以使用**InputStreamResource**对象来下载文件，在下载文件的方法中，我们需要通过Response来设置HttpHeander对象的相关属性，如**Content-Disposition**、**Cache-Control**、**Pragma**和**Expires**等属性。除此之外，还需要指定Response的响应类型。下面的代码给出了文件下载的详细信息： 85 | 86 | ```java 87 | @GetMapping("/download/{fileName}") 88 | @ResponseBody 89 | public ResponseEntity downloadFile(@PathVariable(name = "fileName") String fileName) throws FileNotFoundException { 90 | 91 | File file = new File ( fileUploadRootDir+fileName); 92 | InputStreamResource resource = new InputStreamResource ( new FileInputStream ( file ) ); 93 | 94 | HttpHeaders headers = new HttpHeaders(); 95 | headers.add ( "Content-Disposition",String.format("attachment;filename=\"%s",fileName)); 96 | headers.add ( "Cache-Control","no-cache,no-store,must-revalidate" ); 97 | headers.add ( "Pragma","no-cache" ); 98 | headers.add ( "Expires","0" ); 99 | 100 | ResponseEntity responseEntity = ResponseEntity.ok() 101 | .headers ( headers ) 102 | .contentLength ( file.length ()) 103 | .contentType(MediaType.parseMediaType ( "application/txt" )) 104 | .body(resource); 105 | 106 | return responseEntity; 107 | } 108 | ``` 109 | 110 | 111 | 112 | # 3. 代码清单 113 | 114 | ## 3.1 文件上传和下载控制器 115 | 116 | 下面给出的是完整的文件上传和下载的代码： 117 | 118 | ```java 119 | package com.ramostear.application.controller; 120 | 121 | import com.ramostear.application.model.FileInfo; 122 | import org.springframework.beans.factory.annotation.Value; 123 | import org.springframework.core.io.InputStreamResource; 124 | import org.springframework.http.HttpHeaders; 125 | import org.springframework.http.HttpStatus; 126 | import org.springframework.http.MediaType; 127 | import org.springframework.http.ResponseEntity; 128 | import org.springframework.stereotype.Controller; 129 | import org.springframework.ui.Model; 130 | import org.springframework.web.bind.annotation.*; 131 | import org.springframework.web.multipart.MultipartFile; 132 | 133 | import javax.annotation.PostConstruct; 134 | import java.io.*; 135 | import java.util.Collection; 136 | import java.util.HashMap; 137 | import java.util.Map; 138 | 139 | /** 140 | * @author : ramostear 141 | * @date : 2019/3/8 0008-15:35 142 | */ 143 | @Controller 144 | public class FileController { 145 | 146 | 147 | @Value ( "${file.upload.root.dir}" ) 148 | String fileUploadRootDir; 149 | 150 | private static Map fileRepository = new HashMap<>(); 151 | 152 | @PostConstruct 153 | public void initFileRepository(){ 154 | FileInfo file1 = new FileInfo ().setFileName ( "bg1.jpg" ); 155 | FileInfo file2 = new FileInfo ().setFileName ( "bg2.jpg" ); 156 | FileInfo file3 = new FileInfo ().setFileName ( "bg3.jpg" ); 157 | fileRepository.put ( file1.getName (),file1 ); 158 | fileRepository.put ( file2.getName (),file2 ); 159 | fileRepository.put ( file3.getName (),file3 ); 160 | } 161 | 162 | @GetMapping("/files") 163 | public String files(Model model){ 164 | Collection files = fileRepository.values (); 165 | model.addAttribute ( "data",files ); 166 | return "files"; 167 | } 168 | 169 | 170 | @PostMapping(value = "/upload",consumes = MediaType.MULTIPART_FORM_DATA_VALUE) 171 | @ResponseBody 172 | public String fileUpload(@RequestParam("file") MultipartFile file) throws IOException { 173 | 174 | File convertFile = new File ( fileUploadRootDir+file.getOriginalFilename ()); 175 | FileOutputStream fileOutputStream = new FileOutputStream ( convertFile ); 176 | fileOutputStream.write ( file.getBytes () ); 177 | fileOutputStream.close (); 178 | 179 | FileInfo fileInfo = new FileInfo() 180 | .setFileName ( file.getOriginalFilename()); 181 | 182 | fileRepository.put ( fileInfo.getName (),fileInfo); 183 | 184 | return "File is upload successfully"; 185 | } 186 | 187 | @GetMapping("/download/{fileName}") 188 | @ResponseBody 189 | public ResponseEntity downloadFile(@PathVariable(name = "fileName") String fileName) throws FileNotFoundException { 190 | 191 | File file = new File ( fileUploadRootDir+fileName); 192 | InputStreamResource resource = new InputStreamResource ( new FileInputStream ( file ) ); 193 | 194 | HttpHeaders headers = new HttpHeaders(); 195 | headers.add ( "Content-Disposition",String.format("attachment;filename=\"%s",fileName)); 196 | headers.add ( "Cache-Control","no-cache,no-store,must-revalidate" ); 197 | headers.add ( "Pragma","no-cache" ); 198 | headers.add ( "Expires","0" ); 199 | 200 | ResponseEntity responseEntity = ResponseEntity.ok() 201 | .headers ( headers ) 202 | .contentLength ( file.length ()) 203 | .contentType(MediaType.parseMediaType ( "application/txt" )) 204 | .body(resource); 205 | 206 | return responseEntity; 207 | } 208 | 209 | 210 | 211 | } 212 | 213 | ``` 214 | 215 | ## 3.2 数据模型 216 | 217 | 创建一个文件信息数据模型作为上传文件信息的载体，下面是FileInfo.java的代码： 218 | 219 | ```java 220 | package com.ramostear.application.model; 221 | 222 | import lombok.Data; 223 | 224 | import java.util.Date; 225 | 226 | /** 227 | * @author : ramostear 228 | * @date : 2019/3/8 0008-15:25 229 | */ 230 | @Data 231 | public class FileInfo { 232 | 233 | private String name; 234 | private Date uploadTime = new Date(); 235 | 236 | public FileInfo setFileName(String name){ 237 | this.setName ( name ); 238 | return this; 239 | } 240 | 241 | } 242 | 243 | ``` 244 | 245 | 246 | 247 | ## 3.3 Maven build 文件 248 | 249 | 下面是本次demo应用程序的pom.xml文件配置清单： 250 | 251 | ```xml 252 | 253 | 255 | 4.0.0 256 | 257 | org.springframework.boot 258 | spring-boot-starter-parent 259 | 2.1.3.RELEASE 260 | 261 | 262 | com.ramostear 263 | file-handling 264 | 0.0.1-SNAPSHOT 265 | file-handling 266 | Demo project for Spring Boot 267 | 268 | 269 | 1.8 270 | 271 | 272 | 273 | 274 | org.springframework.boot 275 | spring-boot-starter-thymeleaf 276 | 277 | 278 | org.springframework.boot 279 | spring-boot-starter-freemarker 280 | 281 | 282 | org.springframework.boot 283 | spring-boot-starter-web 284 | 285 | 286 | 287 | org.projectlombok 288 | lombok 289 | true 290 | 291 | 292 | org.springframework.boot 293 | spring-boot-starter-test 294 | test 295 | 296 | 297 | 298 | 299 | 300 | 301 | org.springframework.boot 302 | spring-boot-maven-plugin 303 | 304 | 305 | 306 | 307 | 308 | 309 | ``` 310 | 311 | > 注：本次案例使用freemarker模板引擎作为视图模板 312 | 313 | 314 | 315 | ## 3.4 配置文件 316 | 317 | application.properties文件主要设置了**freemarker**的相关属性以及自定义的**file.upload.root.dir **属性: 318 | 319 | ```properties 320 | spring.freemarker.cache=false 321 | spring.freemarker.prefix= 322 | spring.freemarker.suffix=.html 323 | spring.freemarker.enabled=true 324 | spring.freemarker.charset=UTF-8 325 | spring.freemarker.template-loader-path=classpath:/templates/ 326 | file.upload.root.dir = C:/work/upload/ 327 | ``` 328 | 329 | **file.upload.root.dir**自定义属性设置了文件上传的更目录为：**C:/work/upload/** 330 | 331 | 332 | 333 | 334 | 335 | ## 3.5 视图 336 | 337 | 在视图文件中，创建了一个form表单用于上传文件，另外还创建了一个已上传文件列表，提供文件下载操作。 338 | 339 | 文件上传表单： 340 | 341 | ![上传文件form表单](https://cdn.ramostear.com/2019-03-08-18-23-54-30c336bab2dc4af3a4a53a949dfecc6e.png "上传文件form表单") 342 | 343 | 文件下载列表： 344 | 345 | ![文件下载列表](https://cdn.ramostear.com/2019-03-08-18-24-16-2acd5e38bc4247e098805173d8fa46c5.png "文件下载列表") 346 | 347 | > 说明：文件上使用的是异步上传方式进行上传，没有使用同步提交form表单的方式进行 348 | 349 | 文件上传异步操作代码如下： 350 | 351 | ```javascript 352 | $("#upload").on("click",function () { 353 | var fileObj = document.getElementById("file").files[0]; 354 | var form = new FormData(); 355 | form.append("file",fileObj); 356 | var xhr = new XMLHttpRequest(); 357 | xhr.open("post","http://localhost:8080/upload",true); 358 | xhr.onload = function(event){ 359 | alert(event.currentTarget.responseText); 360 | window.location.href = window.location.href; 361 | }; 362 | xhr.send(form); 363 | }); 364 | ``` 365 | 366 | 367 | 368 | # 4. 打包运行 369 | 370 | 使用Maven命令对应用程序进行打包，下面是maven打包的命令： 371 | 372 | ```tex 373 | mvn clean install 374 | ``` 375 | 376 | 在控制台窗口中运行上述命令，等待maven打包。若控制台中显示**“BUILD SUCCESS”**信息，你可以在当前工程目录下的target文件夹中找到相应的JAR文件。 377 | 378 | 现在，你可以使用下面的命令来运行JAR文件： 379 | 380 | ```tex 381 | java -jar YOUR_JARFILE_NAME 382 | ``` 383 | 384 | JAR文件成功启动后，你可以在控制台窗口中看到如下的信息： 385 | 386 | ![控制台窗口信息](https://cdn.ramostear.com/2019-03-08-18-24-45-b299776efd5a4c6ba1ba4c3757703622.png "控制台窗口信息") 387 | 388 | 389 | 390 | # 5. 测试 391 | 392 | 打开浏览器并在地址栏输入：http://localhost:8080/files 。下面是成功请求后的浏览器截图： 393 | ![文件列表](https://cdn.ramostear.com/2019-03-08-18-25-13-891de6f45dcc48059eb10f4cdb06a8eb.png "文件列表") 394 | 395 | 396 | 接下来，点击其中任意一个**download**按钮，测试文件下载功能是否正常： 397 | ![下载文件](https://cdn.ramostear.com/2019-03-08-18-26-00-2ded0b19d7834fbea458cb93a579d470.png "下载文件") 398 | 399 | 400 | 最后，我们测试一下文件上传功能是否正常。在进行测试之前，我们先看一下文件上传目录中存储的文件信息： 401 | 402 | ![文件上传目录](https://cdn.ramostear.com/2019-03-08-18-26-15-7cef263127954cc090d0ea07627b1c7e.png "文件上传目录") 403 | 404 | 接下来，我们选择一份需要上传的文件，然后点击**upload**按钮上传文件： 405 | 406 | ![上传文件](https://cdn.ramostear.com/2019-03-08-18-26-41-3ef0de1e16d14cda9b181511ae329c6f.png "上传文件") 407 | 408 | 此时，文件以及上传成功，我们再次观察文件上传目录中的文件信息，以验证文件是否成功写入磁盘： 409 | 410 | ![文件上传目录对比](https://cdn.ramostear.com/2019-03-08-18-26-55-7ae1ef770ad543a6b38c1ce8687e8638.png "文件上传目录对比") 411 | 412 | 413 | 414 | # 6. 结束语 415 | 416 | 处理本章节的教程内容外，你还可以访问我的个人博客[RT社圈](https://www.ramostear.com)的[Spring Boot 2.0系列专栏文章](https://www.ramostear.com/archive/spring-boot.html)阅读更多的教程内容。 417 | 418 | 419 | # 声明 420 | 本文作者ramostear, 原文标题: [Spring Boot（十一）— 文件上传和下载](https://www.ramostear.com/posts/2019-03-08/file-handling.html).原文链接: [https://www.ramostear.com/posts/2019-03-08/file-handling.html](https://www.ramostear.com/posts/2019-03-08/file-handling.html) 421 | 如需转载，请联系本文作者。 422 | -------------------------------------------------------------------------------- /mvnw: -------------------------------------------------------------------------------- 1 | #!/bin/sh 2 | # ---------------------------------------------------------------------------- 3 | # Licensed to the Apache Software Foundation (ASF) under one 4 | # or more contributor license agreements. See the NOTICE file 5 | # distributed with this work for additional information 6 | # regarding copyright ownership. The ASF licenses this file 7 | # to you under the Apache License, Version 2.0 (the 8 | # "License"); you may not use this file except in compliance 9 | # with the License. You may obtain a copy of the License at 10 | # 11 | # http://www.apache.org/licenses/LICENSE-2.0 12 | # 13 | # Unless required by applicable law or agreed to in writing, 14 | # software distributed under the License is distributed on an 15 | # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 | # KIND, either express or implied. See the License for the 17 | # specific language governing permissions and limitations 18 | # under the License. 19 | # ---------------------------------------------------------------------------- 20 | 21 | # ---------------------------------------------------------------------------- 22 | # Maven2 Start Up Batch script 23 | # 24 | # Required ENV vars: 25 | # ------------------ 26 | # JAVA_HOME - location of a JDK home dir 27 | # 28 | # Optional ENV vars 29 | # ----------------- 30 | # M2_HOME - location of maven2's installed home dir 31 | # MAVEN_OPTS - parameters passed to the Java VM when running Maven 32 | # e.g. to debug Maven itself, use 33 | # set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000 34 | # MAVEN_SKIP_RC - flag to disable loading of mavenrc files 35 | # ---------------------------------------------------------------------------- 36 | 37 | if [ -z "$MAVEN_SKIP_RC" ] ; then 38 | 39 | if [ -f /etc/mavenrc ] ; then 40 | . /etc/mavenrc 41 | fi 42 | 43 | if [ -f "$HOME/.mavenrc" ] ; then 44 | . "$HOME/.mavenrc" 45 | fi 46 | 47 | fi 48 | 49 | # OS specific support. $var _must_ be set to either true or false. 50 | cygwin=false; 51 | darwin=false; 52 | mingw=false 53 | case "`uname`" in 54 | CYGWIN*) cygwin=true ;; 55 | MINGW*) mingw=true;; 56 | Darwin*) darwin=true 57 | # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home 58 | # See https://developer.apple.com/library/mac/qa/qa1170/_index.html 59 | if [ -z "$JAVA_HOME" ]; then 60 | if [ -x "/usr/libexec/java_home" ]; then 61 | export JAVA_HOME="`/usr/libexec/java_home`" 62 | else 63 | export JAVA_HOME="/Library/Java/Home" 64 | fi 65 | fi 66 | ;; 67 | esac 68 | 69 | if [ -z "$JAVA_HOME" ] ; then 70 | if [ -r /etc/gentoo-release ] ; then 71 | JAVA_HOME=`java-config --jre-home` 72 | fi 73 | fi 74 | 75 | if [ -z "$M2_HOME" ] ; then 76 | ## resolve links - $0 may be a link to maven's home 77 | PRG="$0" 78 | 79 | # need this for relative symlinks 80 | while [ -h "$PRG" ] ; do 81 | ls=`ls -ld "$PRG"` 82 | link=`expr "$ls" : '.*-> \(.*\)$'` 83 | if expr "$link" : '/.*' > /dev/null; then 84 | PRG="$link" 85 | else 86 | PRG="`dirname "$PRG"`/$link" 87 | fi 88 | done 89 | 90 | saveddir=`pwd` 91 | 92 | M2_HOME=`dirname "$PRG"`/.. 93 | 94 | # make it fully qualified 95 | M2_HOME=`cd "$M2_HOME" && pwd` 96 | 97 | cd "$saveddir" 98 | # echo Using m2 at $M2_HOME 99 | fi 100 | 101 | # For Cygwin, ensure paths are in UNIX format before anything is touched 102 | if $cygwin ; then 103 | [ -n "$M2_HOME" ] && 104 | M2_HOME=`cygpath --unix "$M2_HOME"` 105 | [ -n "$JAVA_HOME" ] && 106 | JAVA_HOME=`cygpath --unix "$JAVA_HOME"` 107 | [ -n "$CLASSPATH" ] && 108 | CLASSPATH=`cygpath --path --unix "$CLASSPATH"` 109 | fi 110 | 111 | # For Mingw, ensure paths are in UNIX format before anything is touched 112 | if $mingw ; then 113 | [ -n "$M2_HOME" ] && 114 | M2_HOME="`(cd "$M2_HOME"; pwd)`" 115 | [ -n "$JAVA_HOME" ] && 116 | JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`" 117 | # TODO classpath? 118 | fi 119 | 120 | if [ -z "$JAVA_HOME" ]; then 121 | javaExecutable="`which javac`" 122 | if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then 123 | # readlink(1) is not available as standard on Solaris 10. 124 | readLink=`which readlink` 125 | if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then 126 | if $darwin ; then 127 | javaHome="`dirname \"$javaExecutable\"`" 128 | javaExecutable="`cd \"$javaHome\" && pwd -P`/javac" 129 | else 130 | javaExecutable="`readlink -f \"$javaExecutable\"`" 131 | fi 132 | javaHome="`dirname \"$javaExecutable\"`" 133 | javaHome=`expr "$javaHome" : '\(.*\)/bin'` 134 | JAVA_HOME="$javaHome" 135 | export JAVA_HOME 136 | fi 137 | fi 138 | fi 139 | 140 | if [ -z "$JAVACMD" ] ; then 141 | if [ -n "$JAVA_HOME" ] ; then 142 | if [ -x "$JAVA_HOME/jre/sh/java" ] ; then 143 | # IBM's JDK on AIX uses strange locations for the executables 144 | JAVACMD="$JAVA_HOME/jre/sh/java" 145 | else 146 | JAVACMD="$JAVA_HOME/bin/java" 147 | fi 148 | else 149 | JAVACMD="`which java`" 150 | fi 151 | fi 152 | 153 | if [ ! -x "$JAVACMD" ] ; then 154 | echo "Error: JAVA_HOME is not defined correctly." >&2 155 | echo " We cannot execute $JAVACMD" >&2 156 | exit 1 157 | fi 158 | 159 | if [ -z "$JAVA_HOME" ] ; then 160 | echo "Warning: JAVA_HOME environment variable is not set." 161 | fi 162 | 163 | CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher 164 | 165 | # traverses directory structure from process work directory to filesystem root 166 | # first directory with .mvn subdirectory is considered project base directory 167 | find_maven_basedir() { 168 | 169 | if [ -z "$1" ] 170 | then 171 | echo "Path not specified to find_maven_basedir" 172 | return 1 173 | fi 174 | 175 | basedir="$1" 176 | wdir="$1" 177 | while [ "$wdir" != '/' ] ; do 178 | if [ -d "$wdir"/.mvn ] ; then 179 | basedir=$wdir 180 | break 181 | fi 182 | # workaround for JBEAP-8937 (on Solaris 10/Sparc) 183 | if [ -d "${wdir}" ]; then 184 | wdir=`cd "$wdir/.."; pwd` 185 | fi 186 | # end of workaround 187 | done 188 | echo "${basedir}" 189 | } 190 | 191 | # concatenates all lines of a file 192 | concat_lines() { 193 | if [ -f "$1" ]; then 194 | echo "$(tr -s '\n' ' ' < "$1")" 195 | fi 196 | } 197 | 198 | BASE_DIR=`find_maven_basedir "$(pwd)"` 199 | if [ -z "$BASE_DIR" ]; then 200 | exit 1; 201 | fi 202 | 203 | ########################################################################################## 204 | # Extension to allow automatically downloading the maven-wrapper.jar from Maven-central 205 | # This allows using the maven wrapper in projects that prohibit checking in binary data. 206 | ########################################################################################## 207 | if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then 208 | if [ "$MVNW_VERBOSE" = true ]; then 209 | echo "Found .mvn/wrapper/maven-wrapper.jar" 210 | fi 211 | else 212 | if [ "$MVNW_VERBOSE" = true ]; then 213 | echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..." 214 | fi 215 | jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.2/maven-wrapper-0.4.2.jar" 216 | while IFS="=" read key value; do 217 | case "$key" in (wrapperUrl) jarUrl="$value"; break ;; 218 | esac 219 | done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties" 220 | if [ "$MVNW_VERBOSE" = true ]; then 221 | echo "Downloading from: $jarUrl" 222 | fi 223 | wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" 224 | 225 | if command -v wget > /dev/null; then 226 | if [ "$MVNW_VERBOSE" = true ]; then 227 | echo "Found wget ... using wget" 228 | fi 229 | wget "$jarUrl" -O "$wrapperJarPath" 230 | elif command -v curl > /dev/null; then 231 | if [ "$MVNW_VERBOSE" = true ]; then 232 | echo "Found curl ... using curl" 233 | fi 234 | curl -o "$wrapperJarPath" "$jarUrl" 235 | else 236 | if [ "$MVNW_VERBOSE" = true ]; then 237 | echo "Falling back to using Java to download" 238 | fi 239 | javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java" 240 | if [ -e "$javaClass" ]; then 241 | if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then 242 | if [ "$MVNW_VERBOSE" = true ]; then 243 | echo " - Compiling MavenWrapperDownloader.java ..." 244 | fi 245 | # Compiling the Java class 246 | ("$JAVA_HOME/bin/javac" "$javaClass") 247 | fi 248 | if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then 249 | # Running the downloader 250 | if [ "$MVNW_VERBOSE" = true ]; then 251 | echo " - Running MavenWrapperDownloader.java ..." 252 | fi 253 | ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR") 254 | fi 255 | fi 256 | fi 257 | fi 258 | ########################################################################################## 259 | # End of extension 260 | ########################################################################################## 261 | 262 | export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"} 263 | if [ "$MVNW_VERBOSE" = true ]; then 264 | echo $MAVEN_PROJECTBASEDIR 265 | fi 266 | MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS" 267 | 268 | # For Cygwin, switch paths to Windows format before running java 269 | if $cygwin; then 270 | [ -n "$M2_HOME" ] && 271 | M2_HOME=`cygpath --path --windows "$M2_HOME"` 272 | [ -n "$JAVA_HOME" ] && 273 | JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"` 274 | [ -n "$CLASSPATH" ] && 275 | CLASSPATH=`cygpath --path --windows "$CLASSPATH"` 276 | [ -n "$MAVEN_PROJECTBASEDIR" ] && 277 | MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"` 278 | fi 279 | 280 | WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain 281 | 282 | exec "$JAVACMD" \ 283 | $MAVEN_OPTS \ 284 | -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \ 285 | "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \ 286 | ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@" 287 | -------------------------------------------------------------------------------- /mvnw.cmd: -------------------------------------------------------------------------------- 1 | @REM ---------------------------------------------------------------------------- 2 | @REM Licensed to the Apache Software Foundation (ASF) under one 3 | @REM or more contributor license agreements. See the NOTICE file 4 | @REM distributed with this work for additional information 5 | @REM regarding copyright ownership. The ASF licenses this file 6 | @REM to you under the Apache License, Version 2.0 (the 7 | @REM "License"); you may not use this file except in compliance 8 | @REM with the License. You may obtain a copy of the License at 9 | @REM 10 | @REM http://www.apache.org/licenses/LICENSE-2.0 11 | @REM 12 | @REM Unless required by applicable law or agreed to in writing, 13 | @REM software distributed under the License is distributed on an 14 | @REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 | @REM KIND, either express or implied. See the License for the 16 | @REM specific language governing permissions and limitations 17 | @REM under the License. 18 | @REM ---------------------------------------------------------------------------- 19 | 20 | @REM ---------------------------------------------------------------------------- 21 | @REM Maven2 Start Up Batch script 22 | @REM 23 | @REM Required ENV vars: 24 | @REM JAVA_HOME - location of a JDK home dir 25 | @REM 26 | @REM Optional ENV vars 27 | @REM M2_HOME - location of maven2's installed home dir 28 | @REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands 29 | @REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a key stroke before ending 30 | @REM MAVEN_OPTS - parameters passed to the Java VM when running Maven 31 | @REM e.g. to debug Maven itself, use 32 | @REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000 33 | @REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files 34 | @REM ---------------------------------------------------------------------------- 35 | 36 | @REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on' 37 | @echo off 38 | @REM set title of command window 39 | title %0 40 | @REM enable echoing my setting MAVEN_BATCH_ECHO to 'on' 41 | @if "%MAVEN_BATCH_ECHO%" == "on" echo %MAVEN_BATCH_ECHO% 42 | 43 | @REM set %HOME% to equivalent of $HOME 44 | if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%") 45 | 46 | @REM Execute a user defined script before this one 47 | if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre 48 | @REM check for pre script, once with legacy .bat ending and once with .cmd ending 49 | if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat" 50 | if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd" 51 | :skipRcPre 52 | 53 | @setlocal 54 | 55 | set ERROR_CODE=0 56 | 57 | @REM To isolate internal variables from possible post scripts, we use another setlocal 58 | @setlocal 59 | 60 | @REM ==== START VALIDATION ==== 61 | if not "%JAVA_HOME%" == "" goto OkJHome 62 | 63 | echo. 64 | echo Error: JAVA_HOME not found in your environment. >&2 65 | echo Please set the JAVA_HOME variable in your environment to match the >&2 66 | echo location of your Java installation. >&2 67 | echo. 68 | goto error 69 | 70 | :OkJHome 71 | if exist "%JAVA_HOME%\bin\java.exe" goto init 72 | 73 | echo. 74 | echo Error: JAVA_HOME is set to an invalid directory. >&2 75 | echo JAVA_HOME = "%JAVA_HOME%" >&2 76 | echo Please set the JAVA_HOME variable in your environment to match the >&2 77 | echo location of your Java installation. >&2 78 | echo. 79 | goto error 80 | 81 | @REM ==== END VALIDATION ==== 82 | 83 | :init 84 | 85 | @REM Find the project base dir, i.e. the directory that contains the folder ".mvn". 86 | @REM Fallback to current working directory if not found. 87 | 88 | set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR% 89 | IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir 90 | 91 | set EXEC_DIR=%CD% 92 | set WDIR=%EXEC_DIR% 93 | :findBaseDir 94 | IF EXIST "%WDIR%"\.mvn goto baseDirFound 95 | cd .. 96 | IF "%WDIR%"=="%CD%" goto baseDirNotFound 97 | set WDIR=%CD% 98 | goto findBaseDir 99 | 100 | :baseDirFound 101 | set MAVEN_PROJECTBASEDIR=%WDIR% 102 | cd "%EXEC_DIR%" 103 | goto endDetectBaseDir 104 | 105 | :baseDirNotFound 106 | set MAVEN_PROJECTBASEDIR=%EXEC_DIR% 107 | cd "%EXEC_DIR%" 108 | 109 | :endDetectBaseDir 110 | 111 | IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig 112 | 113 | @setlocal EnableExtensions EnableDelayedExpansion 114 | for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a 115 | @endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS% 116 | 117 | :endReadAdditionalConfig 118 | 119 | SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe" 120 | set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar" 121 | set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain 122 | 123 | set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.2/maven-wrapper-0.4.2.jar" 124 | FOR /F "tokens=1,2 delims==" %%A IN (%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties) DO ( 125 | IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B 126 | ) 127 | 128 | @REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central 129 | @REM This allows using the maven wrapper in projects that prohibit checking in binary data. 130 | if exist %WRAPPER_JAR% ( 131 | echo Found %WRAPPER_JAR% 132 | ) else ( 133 | echo Couldn't find %WRAPPER_JAR%, downloading it ... 134 | echo Downloading from: %DOWNLOAD_URL% 135 | powershell -Command "(New-Object Net.WebClient).DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')" 136 | echo Finished downloading %WRAPPER_JAR% 137 | ) 138 | @REM End of extension 139 | 140 | %MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %* 141 | if ERRORLEVEL 1 goto error 142 | goto end 143 | 144 | :error 145 | set ERROR_CODE=1 146 | 147 | :end 148 | @endlocal & set ERROR_CODE=%ERROR_CODE% 149 | 150 | if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost 151 | @REM check for post script, once with legacy .bat ending and once with .cmd ending 152 | if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat" 153 | if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd" 154 | :skipRcPost 155 | 156 | @REM pause the script if MAVEN_BATCH_PAUSE is set to 'on' 157 | if "%MAVEN_BATCH_PAUSE%" == "on" pause 158 | 159 | if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE% 160 | 161 | exit /B %ERROR_CODE% 162 | -------------------------------------------------------------------------------- /pom.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 4.0.0 5 | 6 | org.springframework.boot 7 | spring-boot-starter-parent 8 | 2.1.3.RELEASE 9 | 10 | 11 | com.ramostear 12 | file-handling 13 | 0.0.1-SNAPSHOT 14 | file-handling 15 | Demo project for Spring Boot 16 | 17 | 18 | 1.8 19 | 20 | 21 | 22 | 23 | org.springframework.boot 24 | spring-boot-starter-thymeleaf 25 | 26 | 27 | org.springframework.boot 28 | spring-boot-starter-freemarker 29 | 30 | 31 | org.springframework.boot 32 | spring-boot-starter-web 33 | 34 | 35 | 36 | org.projectlombok 37 | lombok 38 | true 39 | 40 | 41 | org.springframework.boot 42 | spring-boot-starter-test 43 | test 44 | 45 | 46 | 47 | 48 | 49 | 50 | org.springframework.boot 51 | spring-boot-maven-plugin 52 | 53 | 54 | 55 | 56 | 57 | -------------------------------------------------------------------------------- /src/main/java/com/ramostear/application/FileHandlingApplication.java: -------------------------------------------------------------------------------- 1 | package com.ramostear.application; 2 | 3 | import org.springframework.boot.SpringApplication; 4 | import org.springframework.boot.autoconfigure.SpringBootApplication; 5 | 6 | @SpringBootApplication 7 | public class FileHandlingApplication { 8 | 9 | public static void main(String[] args) { 10 | SpringApplication.run(FileHandlingApplication.class, args); 11 | } 12 | 13 | } 14 | -------------------------------------------------------------------------------- /src/main/java/com/ramostear/application/controller/FileController.java: -------------------------------------------------------------------------------- 1 | package com.ramostear.application.controller; 2 | 3 | import com.ramostear.application.model.FileInfo; 4 | import com.ramostear.application.util.FileUtil; 5 | import org.springframework.beans.factory.annotation.Value; 6 | import org.springframework.core.io.InputStreamResource; 7 | import org.springframework.http.HttpHeaders; 8 | import org.springframework.http.HttpStatus; 9 | import org.springframework.http.MediaType; 10 | import org.springframework.http.ResponseEntity; 11 | import org.springframework.stereotype.Controller; 12 | import org.springframework.ui.Model; 13 | import org.springframework.web.bind.annotation.*; 14 | import org.springframework.web.multipart.MultipartFile; 15 | 16 | import javax.annotation.PostConstruct; 17 | import java.io.*; 18 | import java.util.Collection; 19 | import java.util.HashMap; 20 | import java.util.Map; 21 | 22 | /** 23 | * @author : ramostear 24 | * @date : 2019/3/8 0008-15:35 25 | */ 26 | @Controller 27 | public class FileController { 28 | 29 | private static String fileUploadRootDir = null; 30 | 31 | @Value ( "${file.upload.root.dir.windows}" ) 32 | String fileUploadRootDirWindows; 33 | 34 | @Value ( "${file.upload.root.dir.mac}" ) 35 | String fileUploadRootDirMac; 36 | 37 | @Value ( "${file.upload.root.dir.linux}" ) 38 | String fileUploadRootDirLinux; 39 | 40 | private static Map fileRepository = new HashMap<>(); 41 | 42 | @PostConstruct 43 | public void initFileRepository(){ 44 | FileInfo file1 = new FileInfo ().setFileName ( "bg1.jpg" ); 45 | FileInfo file2 = new FileInfo ().setFileName ( "bg2.jpg" ); 46 | FileInfo file3 = new FileInfo ().setFileName ( "bg3.jpg" ); 47 | fileRepository.put ( file1.getName (),file1 ); 48 | fileRepository.put ( file2.getName (),file2 ); 49 | fileRepository.put ( file3.getName (),file3 ); 50 | 51 | // 判断文件夹是否存在，不存在就创建 52 | String osName = System.getProperty("os.name"); 53 | if (osName.startsWith("Mac OS")) { 54 | // 苹果 55 | fileUploadRootDir = fileUploadRootDirMac; 56 | } else if (osName.startsWith("Windows")) { 57 | // windows 58 | fileUploadRootDir = fileUploadRootDirWindows; 59 | } else { 60 | // unix or linux 61 | fileUploadRootDir = fileUploadRootDirLinux; 62 | } 63 | FileUtil.createDirectories(fileUploadRootDir); 64 | } 65 | 66 | @GetMapping("/files") 67 | public String files(Model model){ 68 | Collection files = fileRepository.values (); 69 | model.addAttribute ( "data",files ); 70 | return "files"; 71 | } 72 | 73 | 74 | @PostMapping(value = "/upload",consumes = MediaType.MULTIPART_FORM_DATA_VALUE) 75 | @ResponseBody 76 | public String fileUpload(@RequestParam("file") MultipartFile file) throws IOException { 77 | 78 | File convertFile = new File ( fileUploadRootDir+file.getOriginalFilename ()); 79 | FileOutputStream fileOutputStream = new FileOutputStream ( convertFile ); 80 | fileOutputStream.write ( file.getBytes () ); 81 | fileOutputStream.close (); 82 | 83 | FileInfo fileInfo = new FileInfo() 84 | .setFileName ( file.getOriginalFilename()); 85 | 86 | fileRepository.put ( fileInfo.getName (),fileInfo); 87 | 88 | return "File is upload successfully"; 89 | } 90 | 91 | @GetMapping("/download/{fileName}") 92 | @ResponseBody 93 | public ResponseEntity downloadFile(@PathVariable(name = "fileName") String fileName) throws FileNotFoundException { 94 | 95 | File file = new File ( fileUploadRootDir+fileName); 96 | InputStreamResource resource = new InputStreamResource ( new FileInputStream ( file ) ); 97 | 98 | HttpHeaders headers = new HttpHeaders(); 99 | headers.add ( "Content-Disposition",String.format("attachment;filename=\"%s",fileName)); 100 | headers.add ( "Cache-Control","no-cache,no-store,must-revalidate" ); 101 | headers.add ( "Pragma","no-cache" ); 102 | headers.add ( "Expires","0" ); 103 | 104 | ResponseEntity responseEntity = ResponseEntity.ok() 105 | .headers ( headers ) 106 | .contentLength ( file.length ()) 107 | .contentType(MediaType.parseMediaType ( "application/txt" )) 108 | .body(resource); 109 | 110 | return responseEntity; 111 | } 112 | 113 | 114 | 115 | } 116 | -------------------------------------------------------------------------------- /src/main/java/com/ramostear/application/model/FileInfo.java: -------------------------------------------------------------------------------- 1 | package com.ramostear.application.model; 2 | 3 | import lombok.Data; 4 | 5 | import java.util.Date; 6 | 7 | /** 8 | * @author : ramostear 9 | * @date : 2019/3/8 0008-15:25 10 | */ 11 | @Data 12 | public class FileInfo { 13 | 14 | private String name; 15 | private Date uploadTime = new Date(); 16 | 17 | public FileInfo setFileName(String name){ 18 | this.setName ( name ); 19 | return this; 20 | } 21 | 22 | } 23 | -------------------------------------------------------------------------------- /src/main/java/com/ramostear/application/util/FileUtil.java: -------------------------------------------------------------------------------- 1 | package com.ramostear.application.util; 2 | 3 | import java.io.File; 4 | 5 | public class FileUtil { 6 | public static void createDirectories(String pathname) { 7 | File directories = new File(pathname); 8 | if (directories.exists()) { 9 | System.out.println("文件上传根目录已存在"); 10 | } else { // 如果目录不存在就创建目录 11 | if (directories.mkdirs()) { 12 | System.out.println("创建多级目录成功"); 13 | } else { 14 | System.out.println("创建多级目录失败"); 15 | } 16 | } 17 | } 18 | } 19 | -------------------------------------------------------------------------------- /src/main/resources/application.properties: -------------------------------------------------------------------------------- 1 | spring.freemarker.cache=false 2 | spring.freemarker.prefix= 3 | spring.freemarker.suffix=.html 4 | spring.freemarker.enabled=true 5 | spring.freemarker.charset=UTF-8 6 | spring.freemarker.template-loader-path=classpath:/templates/ 7 | file.upload.root.dir.windows = C:/work/upload/ 8 | file.upload.root.dir.mac = ~/upload/ 9 | file.upload.root.dir.linux = ~/upload/ -------------------------------------------------------------------------------- /src/main/resources/templates/files.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | file upload and download 6 | 7 | 8 | 9 |
10 |
11 |
12 |

File upload form:

13 |
14 |
15 |
16 |
17 | 18 |
19 | 20 |
21 |
22 |
23 |

File download list:

24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | <#if data?size gt 0> 32 | <#list data as file> 33 | 34 | 35 | 36 | 39 | 40 | 41 | <#else> 42 | 43 | 44 | 45 | 46 | 47 |
file nameupload timedownload
${file.name}${file.uploadTime?string("yyyy-MM-dd")} 37 | download 38 |
please upload a file.
48 |
49 |
50 |
51 | 52 | 53 | 67 | 68 | -------------------------------------------------------------------------------- /src/test/java/com/ramostear/application/FileHandlingApplicationTests.java: -------------------------------------------------------------------------------- 1 | package com.ramostear.application; 2 | 3 | import org.junit.Test; 4 | import org.junit.runner.RunWith; 5 | import org.springframework.boot.test.context.SpringBootTest; 6 | import org.springframework.test.context.junit4.SpringRunner; 7 | 8 | @RunWith(SpringRunner.class) 9 | @SpringBootTest 10 | public class FileHandlingApplicationTests { 11 | 12 | @Test 13 | public void contextLoads() { 14 | } 15 | 16 | } 17 | --------------------------------------------------------------------------------