feat(Go-StudyExample):创建项目，添加使用示例如下：

map与struct之间转换的处理工具使用示例，参考代码地址：https://github.com/mitchellh/mapstructure json与struct之间转换处理工具使用示例
2020-04-28 17:51:57 +08:00
commit 4feb1f61f2
7 changed files with 263 additions and 0 deletions
@@ -0,0 +1,110 @@
+/*
+ *  @Author : huangzj
+ *  @Time : 2020/3/27 15:38
+ *  @Description：
+ */
+
+package example
+
+import (
+	"encoding/json"
+	"fmt"
+	"time"
+)
+
+type Time time.Time
+
+const (
+	timeFormart = "2006-01-02 15:04:05"
+)
+
+//-------------------结构体----------------
+
+type Person struct {
+	Id       int64  `json:"id"`
+	Name     string `json:"name"`
+	Birthday Time   `json:"birthday"`
+}
+
+type json1 struct {
+	Name      string    `json:"name"`       //测试一下别名
+	Value     string    `json:"value,-"`    //测试一下,有别名也有 - 能被转换
+	Value1    string    `json:"-"`          //测试一下,只有 - 能被转换
+	method1   string    `json:"method1"`    //测试一下私有属性不能被转换
+	Now       time.Time `json:"now"`        //测试一下时间字段可否被转换
+	Now1      Time      `json:"now1"`       //自定义时间转换的格式
+	Age       int       `json:",omitempty"` //测试一下 omitempty 值为空不能被转换
+	AgeString string    `json:",omitempty"` //测试一下字符串 omitempty 值为空 不能被转换
+	Length    int       `json:",String"`    //测试一下tag里面带有string的自动转换
+	Person    Person    //测试一下多级的结构
+}
+
+//-----------------------------------------示例方法
+
+/*
+ * 测试序列化功能
+ */
+func JsonMarshalTest() {
+	j := json1{
+		Name:    "name",
+		Value:   "value",
+		Value1:  "value1",
+		method1: "method1",
+		Now:     time.Now(),
+		Now1:    Time(time.Now()),
+		Age:     0,
+		Length:  24,
+		Person: Person{
+			Id:       123,
+			Name:     "xxxx",
+			Birthday: Time(time.Now()),
+		},
+	}
+
+	b, err := json.Marshal(j)
+	if err != nil {
+		panic(err.Error())
+	}
+
+	fmt.Print(string(b))
+
+}
+
+/*
+ * 测试序列化功能
+ */
+func JsonUnmarshalTest() {
+	src := `{"id":5,"name":"xiaoming","birthday":"2016-06-30 16:09:51"}`
+	p := new(Person)
+	err := json.Unmarshal([]byte(src), &p)
+
+	var m map[string]interface{}
+	_ = json.Unmarshal([]byte(src), &m)
+	if err != nil {
+		panic(err.Error())
+	}
+}
+
+//-------------------------接口实现
+
+//实现该方法，实现对应的时间处理，json应该是没有支持时间处理的
+func (t *Time) UnmarshalJSON(data []byte) (err error) {
+	now, err := time.ParseInLocation(`"`+timeFormart+`"`, string(data), time.Local)
+	*t = Time(now)
+	return
+}
+
+/*
+ * 实现该方法，确定时间格式的输出
+ */
+func (t Time) MarshalJSON() ([]byte, error) {
+	b := make([]byte, 0, len(timeFormart)+2)
+	b = append(b, '"')
+	b = time.Time(t).AppendFormat(b, timeFormart)
+	b = append(b, '"')
+	return b, nil
+}
+
+func (t Time) String() string {
+	return time.Time(t).Format(timeFormart)
+}
@@ -0,0 +1,94 @@
+package example
+
+import (
+	entity2 "Go-StudyExample/entity"
+	"encoding/json"
+	"fmt"
+	"github.com/goinggo/mapstructure"
+)
+
+//-----------------------json数据---------------------
+var document = `{"loginName":"sptest1","userType":{"userTypeId":1,"userTypeName":"normal_user","t":"2026-01-02 15:04:05"}}`
+
+var document1 = `{"cobrandId":10010352,"channelId":-1,"locale":"en_US","tncVersion":2,"people":[{"name":"jack","age":{"birth":10,"year":2000,"animals":[{"barks":"yes","tail":"yes"},{"barks":"no","tail":"yes"}]}},{"name":"jill","age":{"birth":11,"year":2001}}]}`
+
+var document2 = `[{"name":"bill"},{"name":"lisa"}]`
+
+//-----------------------------结构体-----------------------
+type Animal struct {
+	Barks string `jpath:"barks"`
+}
+
+type People struct {
+	Age     int      `jpath:"age.birth"` // jpath is relative to the array
+	Animals []Animal `jpath:"age.animals"`
+}
+
+type Items struct {
+	Categories []string `jpath:"categories"`
+	Peoples    []People `jpath:"people"` // Specify the location of the array
+}
+
+//---------------------------------测试方法------------------------
+
+func MapStructureTestFunc() {
+	var te entity2.Entity
+	m := make(map[string]interface{})
+	m["Num"] = 1
+	m["S"] = "test"
+	m["T"] = map[string]string{"1": "1", "2": "2"}
+
+	err := mapstructure.Decode(m, &te)
+	if err != nil {
+		panic(err.Error())
+	}
+
+	fmt.Print(te.Num, " ", te.S, " ", te.T)
+}
+
+func MapStructureTestFunc1() {
+	var docMap map[string]interface{}
+	_ = json.Unmarshal([]byte(document), &docMap)
+
+	var user entity2.User
+	err := mapstructure.Decode(docMap, &user)
+
+	if err != nil {
+		panic(err.Error())
+	}
+	fmt.Println(user.T.Format("2006-01-02 15:04:05"))
+	fmt.Println(user, " ", user.UserType.UserTypeId, " ", user.UserType.UserTypeName)
+}
+
+type NameDoc struct {
+	Name string `jpath:"name"`
+}
+
+func MapStructureTestFunc2() {
+
+	sliceScript := []byte(document2)
+	var sliceMap []map[string]interface{}
+	_ = json.Unmarshal(sliceScript, &sliceMap)
+
+	var myslice []NameDoc
+	err := mapstructure.DecodeSlicePath(sliceMap, &myslice)
+
+	if err != nil {
+		panic(err.Error())
+	}
+
+	fmt.Println(myslice[0], " ", myslice[1])
+}
+
+func MapStructureTestFunc3() {
+	docScript := []byte(document1)
+	var docMap map[string]interface{}
+	_ = json.Unmarshal(docScript, &docMap)
+
+	var items Items
+	err := mapstructure.DecodePath(docMap, &items)
+	if err != nil {
+		panic(err.Error())
+	}
+	fmt.Println(items.Peoples[0], items.Peoples[1])
+}