Go 通过结构体指定字段进行排序

packagemainimport (
"fmt""sort")
// 对结构体指定字段进行排序typeUserstruct {
Namestring`json:"name"`// `json:"xxx"`：在结构体和json字符串字段顺序不一致的情况下：unmarshal根据tag去寻找对应字段的内容Ageint`json:"age"`}
// type Users []User// func SortByAge(u Users) {funcSortByAge(u []User) {
fmt.Printf("源数据：%+v\n", u)
sort.Slice(u, func(i, jint) bool { // descreturnu[i].Age>u[j].Age    })
fmt.Printf("按Age降序：%+v\n", u)
sort.Slice(u, func(i, jint) bool { // ascreturnu[i].Age<u[j].Age    })
fmt.Printf("按Age升序：%+v\n", u)
}
funcmain() {
// 初始化结构体对象数组：// 初始化方法1：// users := Users{//  {//      Name: "test1",//      Age:  22,//  },//  {//      Name: "test2",//      Age:  19,//  },//  {//      Name: "test3",//      Age:  25,//  },// }// 初始化方法2：varusers []UservaruUseru.Name="test1"u.Age=22users=append(users, u)
u.Name="test2"u.Age=20users=append(users, u)
u.Name="test3"u.Age=26users=append(users, u)
SortByAge(users)
}
// 输出：源数据：[{Name:test1Age:22} {Name:test2Age:20} {Name:test3Age:26}]
按Age降序：[{Name:test3Age:26} {Name:test1Age:22} {Name:test2Age:20}]
按Age升序：[{Name:test2Age:20} {Name:test1Age:22} {Name:test3Age:26}]

packagemainimport (
"fmt""sort")
typeUserstruct {
NamestringHighintWightint}
// 先根据身高 High 排序，在High相等时，再根据体重 Wight 排序，最后返回排序后结果funcTestSort(userArr []User) []User {
fori, val :=rangeuserArr {
userArr[i] =User{Name: val.Name, High: val.High, Wight: val.Wight}
    }
sort.Slice(userArr, func(i, jint) bool { // 根据High降序returnuserArr[i].High>userArr[j].High    })
sort.Slice(userArr, func(i, jint) bool {
ifuserArr[i].High==userArr[j].High { // 当High相等时returnuserArr[i].Wight>userArr[j].Wight// 根据Wight降序        } else {
returnuserArr[i].High>userArr[j].High        }
    })
returnuserArr}
funcmain() {
userInfoArr :=TestSort([]User{
        {
Name:  "user1",
High:  170,
Wight: 60,
        },
        {
Name:  "user2",
High:  170,
Wight: 80,
        },
        {
Name:  "user1",
High:  185,
Wight: 60,
        },
    })
fmt.Println("userInfoArr: ", userInfoArr)
}