3 | This is annotation based on Spring and Hibernate Version 4 project. 4 | 5 | Run project using maven command: mvn clean package tomcat7:run
6 | 7 | Short Tutorial & uses:
8 | 9 | Spring JSTL: 10 | ``` 11 | <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> 12 | <%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%> 13 | <%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%> 14 | <%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%> 15 | ``` 16 | 17 | 18 | ============File Upload:============= 19 | ```xml 20 | 1. pom.xml: 21 | 22 |
52 | 53 | ``` 54 | ```java 55 | 4. In Controller: 56 | @Controller 57 | @RequestMapping("/upload") 58 | public class FileUploadController { 59 | 60 | @RequestMapping(method = RequestMethod.GET) 61 | public String index() { 62 | return "fileUpload"; 63 | } 64 | 65 | @RequestMapping(method = RequestMethod.POST) 66 | public String upload(@RequestParam("file") MultipartFile file, Model model) throws IOException { 67 | byte[] bytes; 68 | 69 | if (!file.isEmpty()) { 70 | bytes = file.getBytes(); 71 | 72 | //Write in file. 73 | FileOutputStream out = new FileOutputStream( "D:\\temp\\"+ file.getOriginalFilename() ); 74 | out.write(bytes); 75 | out.close(); 76 | } 77 | 78 | System.out.println( "Received File:" + file.getOriginalFilename() ); 79 | 80 | model.addAttribute("successMsg", "File upload Success: "+ file.getOriginalFilename()); 81 | return "fileUpload"; 82 | } 83 | } 84 | ``` 85 | 86 | ===============Spring Rest API Call=============== 87 | ```xml 88 | 1. POM.xml : Need this for json to/from object: For SPRING REST Call 89 |
Rest Call Example:
146 | Go To Student147 | 148 |
149 | 150 | 151 | 152 | 164 | 165 | 166 | 167 | ``` 168 | ``` 169 | Where $.ajax is jquery Ajax server call method. 170 | content type: application/json is to modify header information from text/html to json. 171 | JSON.stringify is to convert JSON data to String. 172 | $.ajax({ 173 | type : "GET", 174 | contentType : "application/json", 175 | url : "api/rest", 176 | }).then(function(data) { 177 | $('#displayJSON').html(JSON.stringify(data)); 178 | }); 179 | 180 | It will care server api/rest url(that is rest usrl it only accept/resturn json data. 181 | ``` 182 | 183 |
184 | ======================LOG4J=====================
185 | log4j is a reliable, fast and flexible logging framework (APIs) written in Java.
186 | log4j has three main components:
187 | ``` 188 | loggers: Responsible for capturing logging information. 189 | appenders: Responsible for publishing logging information to various preferred destinations. 190 | layouts: Responsible for formatting logging information in different styles. 191 | It uses multiple levels, namely ALL, TRACE, DEBUG, INFO, WARN, ERROR and FATAL 192 | ``` 193 | **************** 194 | Log4j configuration in XML file format. (Create log4j.xml file in src/main/resources) 195 | **************** 196 | ``` 197 | 198 | 199 |
45 | 46 | ``` 47 | ```java 48 | 4. In Controller: 49 | @Controller 50 | @RequestMapping("/upload") 51 | public class FileUploadController { 52 | 53 | @RequestMapping(method = RequestMethod.GET) 54 | public String index() { 55 | return "fileUpload"; 56 | } 57 | 58 | @RequestMapping(method = RequestMethod.POST) 59 | public String upload(@RequestParam("file") MultipartFile file, Model model) throws IOException { 60 | byte[] bytes; 61 | 62 | if (!file.isEmpty()) { 63 | bytes = file.getBytes(); 64 | 65 | //Write in file. 66 | FileOutputStream out = new FileOutputStream( "D:\\temp\\"+ file.getOriginalFilename() ); 67 | out.write(bytes); 68 | out.close(); 69 | } 70 | 71 | System.out.println( "Received File:" + file.getOriginalFilename() ); 72 | 73 | model.addAttribute("successMsg", "File upload Success: "+ file.getOriginalFilename()); 74 | return "fileUpload"; 75 | } 76 | } 77 | ``` 78 | 79 | ===============Spring Rest API Call=============== 80 | ```xml 81 | 1. POM.xml : Need this for json to/from object: For SPRING REST Call 82 |
Rest Call Example:
139 | Go To Student140 | 141 |
142 | 143 | 144 | 145 | 157 | 158 | 159 | 160 | ``` 161 | ``` 162 | Where $.ajax is jquery Ajax server call method. 163 | content type: application/json is to modify header information from text/html to json. 164 | JSON.stringify is to convert JSON data to String. 165 | $.ajax({ 166 | type : "GET", 167 | contentType : "application/json", 168 | url : "api/rest", 169 | }).then(function(data) { 170 | $('#displayJSON').html(JSON.stringify(data)); 171 | }); 172 | 173 | It will care server api/rest url(that is rest usrl it only accept/resturn json data. 174 | ``` 175 | 176 |
177 | ======================LOG4J=====================
178 | log4j is a reliable, fast and flexible logging framework (APIs) written in Java.
179 | log4j has three main components:
180 | ``` 181 | loggers: Responsible for capturing logging information. 182 | appenders: Responsible for publishing logging information to various preferred destinations. 183 | layouts: Responsible for formatting logging information in different styles. 184 | It uses multiple levels, namely ALL, TRACE, DEBUG, INFO, WARN, ERROR and FATAL 185 | ``` 186 | **************** 187 | Log4j configuration in XML file format. (Create log4j.xml file in src/main/resources) 188 | **************** 189 | ``` 190 | 191 | 192 |
@FunctionalInterface, has been introduced. It
5 | * can be placed on an interface to declare the intention of it being a
6 | * functional interface. It will cause the interface to refuse to compile unless
7 | * you've managed to make it a functional interface. It's sort of like
8 | * @Override in this way; it declares intention and doesn't allow
9 | * you to use it incorrectly.
10 | *
11 | * An extremely valuable property of functional interfaces is that they can be
12 | * instantiated using lambdas. Here are a few examples of lambdas:
13 | *
14 | * @author ojhay
15 | *
16 | */
17 | @FunctionalInterface
18 | public interface Bank {
19 |
20 | /**
21 | * Java 8 is that of a "functional interface". An interface is a functional
22 | * interface if it defines exactly one abstract method. Ex: Runnable, Bank
23 | */
24 | public abstract String getName(); // "abstract" modifier not necessary
25 |
26 | /**
27 | * Default methods are not abstract, so a functional interface can define as
28 | * many default methods as it likes.
29 | */
30 | default double getRate() {
31 | return 1.0;
32 | }
33 |
34 | default double getMaxTransAmout(){
35 | return 1_00_000.0;
36 | }
37 |
38 | public static double getDollarExchangeRate() {
39 | return 105.5;
40 | }
41 |
42 | }
43 |
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/src/main/java/com/javastud/springmvcweb/java8/funcinterface/FunctionalInterfaceTest.java:
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1 | package com.javastud.springmvcweb.java8.funcinterface;
2 |
3 | //https://www.techempower.com/blog/2013/03/26/everything-about-java-8/
4 | public class FunctionalInterfaceTest {
5 | public static void main(String[] args) {
6 |
7 | // 1. Lambda: Runnable example
8 | Runnable normalR = new Runnable() {
9 | @Override
10 | public void run() {
11 | System.out.println("I am Normal Old Runnable.");
12 | }
13 | };
14 |
15 | Runnable lambdaR = () -> {
16 | System.out.println("I am New Lambda Runnable.");
17 | };
18 |
19 | // ==========================
20 |
21 | Bank normalGlobal = new Global();
22 | System.out.println(normalGlobal);
23 | System.out.println(normalGlobal.getName() + "\n-----------------");
24 |
25 | Bank annonymousGlobal = new Bank() {
26 | @Override
27 | public String getName() {
28 | return "Name: Annonymous Global Bank.";
29 | }
30 | };
31 | System.out.println(annonymousGlobal);
32 | System.out.println(annonymousGlobal.getName() + "\n-----------------");
33 |
34 | Bank lambdaGlobal = () -> "Name: Lambda Global Bank. ／人 ◕ ‿‿ ◕ 人＼";
35 | System.out.println(lambdaGlobal);
36 | System.out.println(lambdaGlobal.getName() + "\n-----------------");
37 |
38 | // OR for multiline code inside method.
39 | Bank lambdaGl = () -> {
40 | return "Name: Lambda Global Bank. ／人 ◕ ‿‿ ◕ 人＼";
41 | };
42 |
43 | }
44 | }
45 |
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/src/main/java/com/javastud/springmvcweb/java8/funcinterface/Global.java:
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1 | package com.javastud.springmvcweb.java8.funcinterface;
2 |
3 | public class Global implements Bank {
4 |
5 | @Override
6 | public String getName() {
7 | return "Global Bank";
8 | }
9 |
10 | @Override
11 | public double getRate() {
12 | return 6.5; // Bank.super.getRate();
13 | }
14 |
15 | @Override
16 | public String toString() {
17 | return "This is global bank child of Functional interface. Rate: " + getRate();
18 | }
19 |
20 | }
21 |
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/src/main/java/com/javastud/springmvcweb/java8/stream/LambdaStreamCollectorExample.java:
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1 | package com.javastud.springmvcweb.java8.stream;
2 |
3 | import java.util.Arrays;
4 | import java.util.Collections;
5 | import java.util.Comparator;
6 | import java.util.List;
7 | import java.util.stream.Collectors;
8 |
9 | public class LambdaStreamCollectorExample {
10 | public static void main(String[] args) {
11 |
12 | List-
48 |
10 | Loading the data just for you.
11 |
12 |
13 |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
8 |
9 |
10 |
11 |
14 | 15 | 16 | 17 |
18 |
19 |
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/src/main/webapp/WEB-INF/views/currency.jsp:
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1 | <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
2 | <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
3 | 11 |
Hello {{yourName}}!
12 | 13 |14 | 15 | 16 | 17 |
Currency
9 | 10 |
11 |
12 |
21 |
22 | -
13 |
- 14 | 17 | 18 |
15 | 16 | 17 |
18 |
19 |
20 |
26 |
27 |
28 |
29 |
21 |
22 | 
23 | ${fileName}
24 |
25 |