golang 操作mysql测试用例

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package main
import (
"fmt"
"database/sql"
 _ "github.com/go-sql-driver/mysql"
)
type TestMysql struct {
db * sql.DB
}
func Init()(*TestMysql, error) {
 test := new (TestMysql)
 db, err := sql.Open("mysql","root:@tcp(172.16.3.8:3306)/jackma?charset=utf8")
 if err != nil {
  fmt.Println(err.Error())
  return test,nil
 }
 test.db = db
 return test, nil
}
func (test* TestMysql)Create(){
 if test.db == nil {
  return
 }
 stmt , err := test.db.Prepare("insert into test(name, id) values (?, ?)")
 if err != nil {
  fmt.Println(err.Error())
  return
 }
 defer stmt.Close()
 if result, err := stmt.Exec("jack",20); err == nil {
  if id, err := result.LastInsertId(); err == nil {
   fmt.Println("insert id :",id)
  }
 }
 if result, err := stmt.Exec("jack2",30); err == nil {
  if id, err := result.LastInsertId(); err == nil {
   fmt.Println("insert id :",id)
  }
 }
 if result, err := stmt.Exec("jack3",40); err == nil {
  if id, err := result.LastInsertId(); err == nil {
   fmt.Println("insert id :",id)
  }
 }
 if result, err := stmt.Exec("jack4",60); err == nil {
  if id, err := result.LastInsertId(); err == nil {
   fmt.Println("insert id :",id)
  }
 }
}
func (test *TestMysql)Update(){
 if(test.db == nil){
  return
 }
 stmt, err := test.db.Prepare("update test set name =? where id = ?")
 if err != nil {
  fmt.Println(err.Error())
  return
 }
 defer stmt.Close()
 if result, err := stmt.Exec("jackma4888",60); err == nil {
  if c, err := result.RowsAffected(); err == nil {
   fmt.Println("update count:",c)
  }
 }
}
func (test* TestMysql)Read(){
 if test.db == nil{
  return
 }
 rows , err := test.db.Query("select id, name from test")
 if err != nil {
  fmt.Println(err.Error())
  return
 }
 defer rows.Close()
 fmt.Println("")
 clos, _ := rows.Columns()
 for i := range clos {
  fmt.Print(clos[i])
  fmt.Print("\t")
 }
 fmt.Println("")
 var id int;
 var name string;
 for rows.Next() {
  if err := rows.Scan(&id, &name); err != nil {
   fmt.Print(id)
   fmt.Print("\t")
   fmt.Print(name)
   fmt.Print("\t")
   fmt.Print("\t\r\n")
  }
 }
}
func (test *TestMysql) Delete(){
 if test.db == nil{
  return
 }
 stmt , err := test.db.Prepare("delete from test where id = ?")
 if err != nil {
  fmt.Println(err.Error())
  return
 }
 defer stmt.Close()
 if result, err := stmt.Exec(20); err == nil {
  if c, err := result.RowsAffected(); err == nil {
   fmt.Println("delete count :",c)
  }
 }
}
func (test *TestMysql)Close(){
 if test.db != nil {
  test.db.Close()
 }
}
func main(){
 if test, err := Init(); err == nil {
  fmt.Println("create:")
  test.Create()
  fmt.Println("update:")
  test.Update()
  fmt.Println("read:")
  test.Read()
  fmt.Println("delete:")
  test.Delete()
  test.Read()
  fmt.Println("close:")
  test.Close()
 }
}

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