JSON operation for Golang

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Package main Import ("Encoding/json" "FMT" "OS") type configstruct struct {Host string ' JSON:"Host"' Portint' JSON: ' Port '' Analyticsfile string ' JSON:"Analytics_file"' Staticfileversionint' JSON: ' Static_file_version '' Staticdir string ' JSON:"Static_dir"' TemplatesDir string ' JSON:"Templates_dir"' Sertcpsockethost string ' JSON:"Sertcpsockethost"' Sertcpsocketportint' JSON: ' Sertcpsocketport '' Fruits []string ' JSON:"Fruits"'} type other struct {sertcpsockethost string ' JSON:"Sertcpsockethost"' Sertcpsocketportint' JSON: ' Sertcpsocketport '' Fruits []string ' JSON:"Fruits"'} func main () {jsonstr:= ' {' host ': ' http://localhost:9090 ', ' Port ': 9090, ' analytics_file ': ', ' static_file_version ': 1, ' static_dir ': ' e:/ project/gotest/src/"," Templates_dir ":" e:/project/gotest/src/templates/"," Sertcpsockethost ":": 12340 "," Sertcpsocketport ": 12340," fruits ": [" apple "," peach "]}`     //JSON str goto map    vardat map[string]interface{}ifERR: = json. Unmarshal ([]byte(JSONSTR), &dat); Err = =Nil {fmt. Println ("==============json str Turn map=======================") fmt. PRINTLN (DAT) fmt. Println (dat["Host"])    }     //json str transfer struct    varconfig configstructifERR: = json. Unmarshal ([]byte(JSONSTR), &config); Err = =Nil {fmt. Println ("================json str Turn struct==") fmt. Println (config) fmt. Println (config. Host)}//json str to struct (partial field)    var Part OtherifERR: = json. Unmarshal ([]byte(JSONSTR), &part); Err = =Nil {fmt. Println ("================json str Turn struct==") fmt. Println (part) FMT. Println (part. Sertcpsocketport)}//struct to JSON str    ifB, err: = json. Marshal (config); Err = =Nil {fmt. Println ("================struct to JSON str==") fmt. Println (string (b))}//map to JSON strFmt. Println ("================map to JSON str=====================") ENC:=JSON. Newencoder (OS. Stdout) Enc. Encode (DAT)//array to json strArr: = []string{"Hello", "apple", "Python", "Golang", "base", "peach", "pear"} lang, err:=JSON. Marshal (arr)ifErr = =Nil {fmt. Println ("================array to JSON str==") fmt. Println (String (lang))}//json to []string    varwo []stringifERR: = json. Unmarshal (lang, &wo); Err = =Nil {fmt. Println ("================json to []string==") fmt. Println (wo)}}