Go语言之mysql

短命女 2022-02-13 09:55 271阅读 0赞

## 1.导入Go-MySQL-Driver驱动包 ##

在命令行输入

go get github.com/go-sql-driver/mysql

## 2.go语言连接并操作MySQL数据库 ##

代码如下

package main
    
    import (
    	"database/sql"
    	"fmt"
    	_ "github.com/go-sql-driver/mysql"
    )
    
    func main(){
    	db,err:=sql.Open("mysql","root:123456@tcp(127.0.0.1:3306)/testgo?charset=utf8")
    	if err!=nil{
    		panic(err)
    	}else{
    		fmt.Println(db.Stats())
    	}
    
    	//插入用户
    
    	//statement,err:=db.Prepare("insert into user set username=?,password=?")
    	statement,err:=db.Prepare("insert into user(username,password) values(?,?)")
    
    	if err!=nil{
    		panic(err)
    	}else{
    		//fmt.Println(statement)
    		res,err:=statement.Exec("wangwu","wangwu1111")
    
    		if err!=nil{
    			panic(err)
    		}else{
    			//打印最后插入的id
    
    			fmt.Println(res.LastInsertId())
    		}
    	}
    	//修改用户
    
    	statement1,err:=db.Prepare("update user set username=? where id=?")
    	if err!=nil{
    		panic(err)
    	}else{
    		res,err:=statement1.Exec("wangwu1",3)
    		if err!=nil{
    			panic(err)
    		}else{
    			//打印影响的行
    			fmt.Println(res.RowsAffected())
    		}
    	}
    	//删除用户
    	statement2,err:=db.Prepare("delete  from user where id=?")
    	if err!=nil{
    		panic(err)
    	}else{
    		res,err:=statement2.Exec(1)
    		if err!=nil{
    			panic(err)
    		}else{
    			//打印影响的行
    			fmt.Println(res.RowsAffected())
    		}
    	}
    	//rows,err:=db.Query("select  * from user where id=2")
    
    	rows,err:=db.Query("select  * from user where username='"+"Sarah"+"'")
    
    
    	for rows.Next(){
    		var id int
    		var username string
    		var password string
    		//获取一行的数据
    		err=rows.Scan(&id,&username,&password)
    
    		if err!=nil{
    			panic(err)
    		}else{
    			fmt.Println("id:",id," username:",username," password:",password)
    		}
    	}
    
    	db.Close()
    
    
    }