Time format solution for Golang structure JSON

A recent development project found a time format problem for JSON conversion of a struct.

That is, this 1993-01-01t20:08:23.000000028+08:00 represents the UTC method. From what we used to say, it's more like hope.

1993-01-01 20:08:23 this format.

The re-replication code is as follows:

Package Mainimport ("Time" "Encoding/json") type Student struct {name string ' JSON: ' name ' ' Brith time. Time ' JSON: "Brith" '}func Main () {stu:=student{Name: "Qiangmzsx", Brith:time. Date (1993, 1, 1, 8,. Local),} b,err:=json. Marshal (stu) if Err!=nil {println (Err)} println (string (b))//{"name": "Qiangmzsx", "Brith": "1993-01-01t20:0 8:23.000000028+08:00 "}}

In the face of such problems, how is Golang solved?

There are two kinds of solutions, let's take a look at each one.

pass time. Time Type alias

Type jsontime time. time//  implements its JSON serialization method func  (This jsontime)  marshaljson ()   ([]byte, error)  {     var stamp = fmt. Sprintf ("\"%s\ "",  time. Time (this). Format ("2006-01-02 15:04:05"))     return []byte (stamp), nil}type  student1 struct {    name string      ' JSON: ' Name ' '     Brith JsonTime   ' JSON: "Brith" '}func main ()   {     stu1:=student1{        name: "Qiangmzsx",         brith:jsontime (time. Date (1993, 1, 1, 20, 8, 23, 28, time. Local)),     }    b1,err:=json. Marshal (STU1)     if err!=nil {         println (ERR)    &nbsP;}     println (String (B1))//{"name": "Qiangmzsx", "Brith": "1993-01-01 20:08:23"}}

Using struct-body combination methods

It's a bit more complicated than the first, and I'm not recommending it as an extended tutorial.

type student2 struct {    name string      ' JSON: "Name"     //  be sure to ignore the JSON tag settings and not parse out the     brith time. time   ' JSON: '-' '}//  implements its JSON serialization method func  (This student2)  marshaljson ()   ([]byte ,  error)  {    //  defines an alias for the struct     TYPE ALIASSTU  Student2    //  define a new structural body     tmpstudent:= struct {         aliasstu        brith  string  ' JSON: ' Brith '     }{         Aliasstu: (Aliasstu) (this),         brith:this. Brith.format ("2006-01-02 15:04:05"),     }    return json. Marshal (tmpstudent)}func main ()   {     stu2:=student2{        name: "Qiangmzsx",         brith:time. Date (1993, 1, 1, 20, 8, 23, 28, time. Local),     }    b2,err:=json. Marshal (STU2)     if err!=nil {         println (Err)     }    println (String (b2))//{"name": "Qiangmzsx", "Brith": "1993-01-01 20:08:23"}}

This method uses the combination of Golang structure, can realize the inheritance of OOP, but also embodies golang flexibility.

Below, the above code is composed of the whole.

package mainimport  (     "Time"      "Encoding/json"      //"FMT"      "FMT") type student struct {     Name string      ' JSON: ' Name ' '     brith time. time  ' JSON: "Brith" '}type jsontime time. time//  implements its JSON serialization method func  (This jsontime)  marshaljson ()   ([]byte, error)  {     var stamp = fmt. Sprintf ("\"%s\ "",  time. Time (this). Format ("2006-01-02 15:04:05"))     return []byte (stamp), nil}type  student1 struct {    name string      ' JSON: ' Name ' '     Brith JsonTime   ' JSON: "Brith" '}type student2 struct {     Name string      ' JSON: ' Name ' '    &NBsp;//  Be sure to ignore the JSON tag settings do not parse out the     brith time. time   ' JSON: '-' '}//  implements its JSON serialization method func  (This student2)  marshaljson ()   ([]byte ,  error)  {    //  defines an alias for the struct     TYPE ALIASSTU  Student2    //  define a new structural body     tmpstudent:= struct {         aliasstu        brith  string  ' JSON: ' Brith '     }{         Aliasstu: (Aliasstu) (this),         brith:this. Brith.format ("2006-01-02 15:04:05"),     }    return json. Marshal (tmpstudent)}func main ()   {    stu:=Student{         name: "Qiangmzsx",        &NBsp Brith:time. Date (1993, 1, 1, 20, 8, 23, 28, time. Local),     }    b,err:=json. Marshal (Stu)     if err!=nil {         println (Err)     }    println (string (b))//{"name": "Qiangmzsx", "Brith": " 1993-01-01t20:08:23.000000028+08:00 "}    println (" =================== ")      stu1:=student1{        name: "Qiangmzsx",         brith:jsontime (time. Date (1993, 1, 1, 20, 8, 23, 28, time. Local)),     }    b1,err:=json. Marshal (STU1)     if err!=nil {         println (Err)     }    println (String (B1))//{"name": "Qiangmzsx", "Brith": "1993-01-01 20:08:23 "}    println (" =================== ")     stu2:= Student2{        name: "Qiangmzsx",         brith:time. Date (1993, 1, 1, 20, 8, 23, 28, time. Local),     }    b2,err:=json. Marshal (STU2)     if err!=nil {         println (Err)     }    println (String (b2))//{"name": "Qiangmzsx", "Brith": "1993-01-01 20:08:23"}}

It is worth mentioning that add  marshaljson ,unmarshaljson, string  method to any struct, implement custom JSON output format and printing way.