1.5 GO json转Map

package mainimport ( ???"encoding/json" ???"fmt" ???"strconv")/*以mysql 从库show slave status查询返回的json串为例查询show slave status以json方式返回将之转为map[string]interface{}遍历map转为map[string]stringmap[key]返回查询的参数值 */func getJSONValue(key string) string { ???ss := []byte(`{"Auto_Position":0,"Channel_Name":"","Connect_Retry":60,"Exec_Master_Log_Pos":450949253,"Executed_Gtid_Set":"","Last_Errno":0,"Last_Error":"","Last_IO_Errno":0,"Last_IO_Error":"","Last_IO_Error_Timestamp":"","Last_SQL_Errno":0,"Last_SQL_Error":"","Last_SQL_Error_Timestamp":"","Master_Bind":"","Master_Host":"10.10.10.10","Master_Info_File":"/data/mysql/data/tanpf/master.info","Master_Log_File":"mysql-bin.000269","Master_Port":3309,"Master_Retry_Count":86400,"Master_SSL_Allowed":"No","Master_SSL_CA_File":"","Master_SSL_CA_Path":"","Master_SSL_Cert":"","Master_SSL_Cipher":"","Master_SSL_Crl":"","Master_SSL_Crlpath":"","Master_SSL_Key":"","Master_SSL_Verify_Server_Cert":"No","Master_Server_Id":330901,"Master_TLS_Version":"","Master_UUID":"5a1c5dfb-b721-11e8-a53e-6c92bf2e0119","Master_User":"db_slave","Read_Master_Log_Pos":450949253,"Relay_Log_File":"mysql-relay-bin.000811","Relay_Log_Pos":450949466,"Relay_Log_Space":285022926812,"Relay_Master_Log_File":"mysql-bin.000269","Replicate_Do_DB":"","Replicate_Do_Table":"","Replicate_Ignore_DB":"","Replicate_Ignore_Server_Ids":"","Replicate_Ignore_Table":"","Replicate_Rewrite_DB":"","Replicate_Wild_Do_Table":"","Replicate_Wild_Ignore_Table":"performance_schema.%,information_schema.%,test.%","Retrieved_Gtid_Set":"","SQL_Delay":0,"SQL_Remaining_Delay":null,"Seconds_Behind_Master":0,"Skip_Counter":0,"Slave_IO_Running":"Yes","Slave_IO_State":"Waiting for master to send event","Slave_SQL_Running":"Yes","Slave_SQL_Running_State":"Slave has read all relay log; waiting for more updates","Until_Condition":"None","Until_Log_File":"","Until_Log_Pos":0}`) ???var f interface{} ???err := json.Unmarshal(ss, &f) ???if err != nil { ???????fmt.Println(err) ???} ???m := f.(map[string]interface{}) ???mnew := make(map[string]string) ???//val := m[key].(string) ???res := "" ???for k, v := range m { ???????switch vv := v.(type) { ???????case string: ???????????//fmt.Println(k, "is string", vv) ???????????res = vv ???????????mnew[k] = res ???????case int, int8, int16, int32, int64,uint, uint8, uint16, uint32, uint64: ???????????res = fmt.Sprintf("%v",vv) ???????????mnew[k] = res ???????????//fmt.Println(k, "is int", vv) ???????case float32: ???????????res = strconv.FormatFloat(float64(vv),‘f‘,0,64) ???????????mnew[k] = res ???????????//fmt.Println(k, "is float32", vv) ???????case float64: ???????????res = strconv.FormatFloat(vv,‘f‘,0,64) ???????????mnew[k] = res ???????????//fmt.Println(k, "is float64", res) ???????case []interface{}: ???????????fmt.Println(k, "is an array:") ???????????for i, u := range vv { ???????????????fmt.Println(i, u) ???????????} ???????default: ???????????//fmt.Println(k, "is of a type I don‘t know how to handle") ???????????res = fmt.Sprintf("%v",vv) ???????????mnew[k] = res ???????} ???} ???res = mnew[key] ???return res}func main() { ???//获取主从延迟 ???res := getJSONValue("Seconds_Behind_Master") ???fmt.Println(res)}