├── .gitignore ├── LICENSE ├── README.md ├── example └── example.go ├── go.mod ├── go.sum ├── json2struct.go ├── json2struct_test.go ├── map2struct.go ├── map2struct_test.go ├── util └── util.go ├── yaml2struct.go └── yaml2struct_test.go /.gitignore: -------------------------------------------------------------------------------- 1 | /.idea 2 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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-------------------------------------------------------------------------------- 1 | # go2struct 2 | Convert arbitrary formats to Go Struct (including json, toml, yaml, etc.) 3 | 4 | ### Installation 5 | 6 | Run the following command under your project: 7 | 8 | > go get -u github.com/NICEXAI/go2struct 9 | 10 | ### Feature 11 | - [x] Map to struct 12 | - [x] JSON to struct 13 | - [x] YAML to struct 14 | - [ ] TOML to struct 15 | 16 | ### Example 17 | 18 | ```go 19 | package main 20 | 21 | import ( 22 | "encoding/json" 23 | "fmt" 24 | "github.com/NICEXAI/go2struct" 25 | ) 26 | 27 | type Message struct { 28 | Code int `json:"code"` 29 | Success bool `json:"success"` 30 | Msg struct { 31 | Content string 32 | } `json:"msg"` 33 | } 34 | 35 | func main() { 36 | var options map[string]interface{} 37 | 38 | message := Message{ 39 | Code: 200, 40 | Msg: struct{ Content string }{Content: "Hello"}, 41 | } 42 | 43 | bData, err := json.Marshal(message) 44 | if err != nil { 45 | fmt.Printf("json marshal failed, error: %v", err) 46 | return 47 | } 48 | _ = json.Unmarshal(bData, &options) 49 | 50 | //map to struct 51 | structTxt := go2struct.Map2Struct("message", options) 52 | 53 | fmt.Printf("map to struct success, result: \n%s", structTxt) 54 | 55 | // json to struct 56 | jsonTemp := ` 57 | { 58 | "code": 200, 59 | "success": true, 60 | "msg": { 61 | "content": "Hello" 62 | } 63 | } 64 | ` 65 | 66 | res, err := go2struct.JSON2Struct("message", []byte(jsonTemp)) 67 | if err != nil { 68 | fmt.Printf("json to struct failed, error: \n%v", err) 69 | return 70 | } 71 | fmt.Printf("json to struct success, result: \n%s", res) 72 | 73 | // yaml to struct 74 | temp := ` 75 | code: 200 76 | success: true 77 | msg: 78 | content: Hello 79 | ` 80 | 81 | res, err = go2struct.YAML2Struct("message", []byte(temp)) 82 | if err != nil { 83 | fmt.Printf("yaml to struct failed, error: \n%v", err) 84 | return 85 | } 86 | fmt.Printf("yaml to struct success, result: \n%s", res) 87 | } 88 | ``` 89 | -------------------------------------------------------------------------------- /example/example.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "encoding/json" 5 | "fmt" 6 | "github.com/NICEXAI/go2struct" 7 | ) 8 | 9 | type Message struct { 10 | Code int `json:"code"` 11 | Success bool `json:"success"` 12 | Msg struct { 13 | Content string 14 | } `json:"msg"` 15 | } 16 | 17 | func main() { 18 | var options map[string]interface{} 19 | 20 | message := Message{ 21 | Code: 200, 22 | Msg: struct{ Content string }{Content: "Hello"}, 23 | } 24 | 25 | bData, err := json.Marshal(message) 26 | if err != nil { 27 | fmt.Printf("json marshal failed, error: %v", err) 28 | return 29 | } 30 | _ = json.Unmarshal(bData, &options) 31 | 32 | //map to struct 33 | structTxt := go2struct.Map2Struct("message", options) 34 | 35 | fmt.Printf("map to struct success, result: \n%s", structTxt) 36 | 37 | // json to struct 38 | jsonTemp := ` 39 | { 40 | "code": 200, 41 | "success": true, 42 | "msg": { 43 | "content": "Hello" 44 | } 45 | } 46 | ` 47 | 48 | res, err := go2struct.JSON2Struct("message", []byte(jsonTemp)) 49 | if err != nil { 50 | fmt.Printf("json to struct failed, error: \n%v", err) 51 | return 52 | } 53 | fmt.Printf("json to struct success, result: \n%s", res) 54 | 55 | // yaml to struct 56 | temp := ` 57 | code: 200 58 | success: true 59 | msg: 60 | content: Hello 61 | ` 62 | 63 | // supports custom field tag name 64 | res, err = go2struct.YAML2Struct("message", []byte(temp), "mapstructure") 65 | if err != nil { 66 | fmt.Printf("yaml to struct failed, error: \n%v", err) 67 | return 68 | } 69 | fmt.Printf("yaml to struct success, result: \n%s", res) 70 | } 71 | -------------------------------------------------------------------------------- /go.mod: -------------------------------------------------------------------------------- 1 | module github.com/NICEXAI/go2struct 2 | 3 | go 1.17 4 | 5 | require gopkg.in/yaml.v2 v2.4.0 6 | -------------------------------------------------------------------------------- /go.sum: -------------------------------------------------------------------------------- 1 | gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM= 2 | gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= 3 | gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY= 4 | gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ= 5 | -------------------------------------------------------------------------------- /json2struct.go: -------------------------------------------------------------------------------- 1 | package go2struct 2 | 3 | import "encoding/json" 4 | 5 | // JSON2Struct convert json to struct 6 | func JSON2Struct(name string, data []byte, args ...string) ([]byte, error) { 7 | var m map[string]interface{} 8 | 9 | if err := json.Unmarshal(data, &m); err != nil { 10 | return nil, err 11 | } 12 | 13 | return Map2Struct(name, m, args...), nil 14 | } 15 | -------------------------------------------------------------------------------- /json2struct_test.go: -------------------------------------------------------------------------------- 1 | package go2struct 2 | 3 | import ( 4 | "testing" 5 | ) 6 | 7 | func TestJSON2Struct(t *testing.T) { 8 | temp := ` 9 | { 10 | "code": 200, 11 | "success": true, 12 | "msg": { 13 | "content": "Hello" 14 | } 15 | } 16 | ` 17 | 18 | res, err := JSON2Struct("message", []byte(temp)) 19 | if err != nil { 20 | t.Fatalf("json to struct failed, error: \n%v", err) 21 | return 22 | } 23 | t.Logf("json to struct success, result: \n%s", res) 24 | } 25 | -------------------------------------------------------------------------------- /map2struct.go: -------------------------------------------------------------------------------- 1 | package go2struct 2 | 3 | import ( 4 | "fmt" 5 | "github.com/NICEXAI/go2struct/util" 6 | "strings" 7 | ) 8 | 9 | const ( 10 | structFirst = "type " 11 | structLast = "}" 12 | // $name $isSlice struct { 13 | structStartTag = "%s %sstruct {\n" 14 | // $space} `$tag:\"%name\"`\n" 15 | structEndTag = "%s} `%s:\"%s\"`\n" 16 | structSpace = " " 17 | // $space $name $type `$tag:"$nameFormat"` 18 | structFieldTag = "%s%s %s `%s:\"%s\"`\n" 19 | ) 20 | 21 | // Map2Struct convert map to struct 22 | func Map2Struct(name string, m map[string]interface{}, args ...string) []byte { 23 | cellNodes := convertMapToCellNode(name, m, false, 0, args...) 24 | structTxt, _ := util.FormatGoStruct(strings.Join(cellNodes, "")) 25 | return []byte(structTxt) 26 | } 27 | 28 | func convertMapToCellNode(name string, m map[string]interface{}, isSlice bool, tier int, args ...string) (cn []string) { 29 | tagName := "json" 30 | if len(args) > 0 { 31 | tagName = args[0] 32 | } 33 | if tier == 0 { 34 | cn = append(cn, structFirst) 35 | } 36 | wrapperSpace := getSpaceByTier(tier - 1) 37 | if isSlice { 38 | cn = append(cn, fmt.Sprintf(structStartTag, wrapperSpace+util.UnderscoreToUpperCamelCase(name), "[]")) 39 | } else { 40 | cn = append(cn, fmt.Sprintf(structStartTag, wrapperSpace+util.UnderscoreToUpperCamelCase(name), "")) 41 | } 42 | 43 | for field, val := range m { 44 | fName := util.UnderscoreToUpperCamelCase(field) 45 | fType := getFiledType(val) 46 | 47 | if fType == "struct" { 48 | if list, ok := val.(map[interface{}]interface{}); ok { 49 | //convert map[interface{}]interface{} to map[string]interface{} 50 | newVal := make(map[string]interface{}) 51 | for k, v := range list { 52 | strKey := fmt.Sprintf("%v", k) 53 | newVal[strKey] = v 54 | } 55 | val = newVal 56 | } 57 | } 58 | 59 | if fType != "struct" && fType != "slice" { 60 | cn = append(cn, fmt.Sprintf(structFieldTag, getSpaceByTier(tier), fName, fType, tagName, util.UpperCamelCaseToUnderscore(field))) 61 | } 62 | 63 | if fType == "struct" { 64 | child := convertMapToCellNode(field, val.(map[string]interface{}), false, tier+1, args...) 65 | cn = append(cn, child...) 66 | } 67 | 68 | if fType == "slice" { 69 | subList, _ := val.([]interface{}) 70 | if len(subList) > 0 { 71 | fSubType := getFiledType(subList[0]) 72 | if fSubType != "struct" && fSubType != "slice" { 73 | cn = append(cn, fmt.Sprintf(structFieldTag, getSpaceByTier(tier), fName, "[]"+fSubType, tagName, util.UpperCamelCaseToUnderscore(field))) 74 | } 75 | if fSubType == "struct" { 76 | if sList, ok := subList[0].(map[interface{}]interface{}); ok { 77 | //convert map[interface{}]interface{} to map[string]interface{} 78 | sNewVal := make(map[string]interface{}) 79 | for k, v := range sList { 80 | strKey := fmt.Sprintf("%v", k) 81 | sNewVal[strKey] = v 82 | } 83 | subList[0] = sNewVal 84 | } 85 | 86 | child := convertMapToCellNode(field, subList[0].(map[string]interface{}), true, tier+1, args...) 87 | cn = append(cn, child...) 88 | } 89 | } 90 | } 91 | } 92 | 93 | if tier == 0 { 94 | cn = append(cn, structLast) 95 | } else { 96 | cn = append(cn, fmt.Sprintf(structEndTag, wrapperSpace, tagName, name)) 97 | } 98 | return cn 99 | } 100 | 101 | func getSpaceByTier(tier int) (s string) { 102 | for i := 0; i < tier+1; i++ { 103 | s += structSpace 104 | } 105 | return s 106 | } 107 | 108 | func getFiledType(filed interface{}) string { 109 | switch filed.(type) { 110 | case float64: 111 | if strings.Contains(fmt.Sprintf("%v", filed), ".") { 112 | return "float64" 113 | } 114 | return "int" 115 | case int: 116 | return "int" 117 | case bool: 118 | return "bool" 119 | case string: 120 | return "string" 121 | case map[string]interface{}: 122 | return "struct" 123 | case map[interface{}]interface{}: 124 | return "struct" 125 | case []interface{}: 126 | return "slice" 127 | default: 128 | return "" 129 | } 130 | } 131 | -------------------------------------------------------------------------------- /map2struct_test.go: -------------------------------------------------------------------------------- 1 | package go2struct 2 | 3 | import ( 4 | "encoding/json" 5 | "testing" 6 | ) 7 | 8 | type Message struct { 9 | Code int `json:"code"` 10 | Success bool `json:"success"` 11 | Msg struct { 12 | Content string 13 | } `json:"msg"` 14 | } 15 | 16 | func TestMap2Struct(t *testing.T) { 17 | var options map[string]interface{} 18 | 19 | message := Message{ 20 | Code: 200, 21 | Msg: struct{ Content string }{Content: "Hello"}, 22 | } 23 | 24 | bData, err := json.Marshal(message) 25 | if err != nil { 26 | t.Fatalf("json marshal failed, error: %v", err) 27 | return 28 | } 29 | _ = json.Unmarshal(bData, &options) 30 | t.Logf("map to struct success, result: \n%s", Map2Struct("message", options)) 31 | } 32 | -------------------------------------------------------------------------------- /util/util.go: -------------------------------------------------------------------------------- 1 | package util 2 | 3 | import ( 4 | "bytes" 5 | "go/format" 6 | "go/parser" 7 | "go/token" 8 | "strings" 9 | "unicode" 10 | ) 11 | 12 | // UnderscoreToUpperCamelCase word change from underscore to upperCamelCase 13 | func UnderscoreToUpperCamelCase(n string) string { 14 | var cList []string 15 | 16 | for _, cell := range strings.Split(n, "_") { 17 | cList = append(cList, strings.Title(cell)) 18 | } 19 | 20 | return strings.Join(cList, "") 21 | } 22 | 23 | // UpperCamelCaseToUnderscore word change from upperCamelCase to underscore 24 | func UpperCamelCaseToUnderscore(n string) string { 25 | var ( 26 | cList []rune 27 | isUpper bool 28 | ) 29 | 30 | for i, cell := range n { 31 | if unicode.IsUpper(cell) { 32 | if i != 0 && !isUpper { 33 | cList = append(cList, '_') 34 | } 35 | cList = append(cList, unicode.ToLower(cell)) 36 | isUpper = true 37 | } else { 38 | cList = append(cList, cell) 39 | isUpper = false 40 | } 41 | } 42 | 43 | return string(cList) 44 | } 45 | 46 | // FormatGoStruct format the go struct text 47 | func FormatGoStruct(txt string) (string, error) { 48 | buffer := bytes.NewBufferString("") 49 | choreTxt := "package main\n\n" 50 | newTxt := choreTxt + string(txt) 51 | 52 | f, err := parser.ParseFile(token.NewFileSet(), "", []byte(newTxt), 0) 53 | if err != nil { 54 | return "", err 55 | } 56 | 57 | if err = format.Node(buffer, token.NewFileSet(), f); err != nil { 58 | return "", err 59 | } 60 | 61 | structTxt := strings.Replace(buffer.String(), choreTxt, "", 1) 62 | return structTxt, nil 63 | } 64 | -------------------------------------------------------------------------------- /yaml2struct.go: -------------------------------------------------------------------------------- 1 | package go2struct 2 | 3 | import "gopkg.in/yaml.v2" 4 | 5 | // YAML2Struct convert yaml to struct 6 | func YAML2Struct(name string, data []byte, args ...string) ([]byte, error) { 7 | var m map[string]interface{} 8 | 9 | if err := yaml.Unmarshal(data, &m); err != nil { 10 | return nil, err 11 | } 12 | 13 | return Map2Struct(name, m, args...), nil 14 | } 15 | -------------------------------------------------------------------------------- /yaml2struct_test.go: -------------------------------------------------------------------------------- 1 | package go2struct 2 | 3 | import "testing" 4 | 5 | func TestYAML2Struct(t *testing.T) { 6 | temp := ` 7 | code: 200 8 | success: true 9 | msg: 10 | content: Hello 11 | ` 12 | 13 | res, err := YAML2Struct("message", []byte(temp)) 14 | if err != nil { 15 | t.Fatalf("yaml to struct failed, error: \n%v", err) 16 | return 17 | } 18 | t.Logf("yaml to struct success, result: \n%s", res) 19 | } 20 | --------------------------------------------------------------------------------