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Java连接Mysql数据库增删改查实现
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Java連接Mysql數據庫增刪改查實現
時間比較趕，我這里只實現查詢，有時間再添加另外兩個
難度 : ???（全星5顆星的情況下）
新建一個動態的網站工程，
把jar包全部復制進去，主要要那個mysql-connector-java那個jar包，重要通知，我的mysql版本是5.7.18-log版本，這個jar版本夠，如果你裝的是mysql8點幾的版本，則帶不起來，需要高版本的驅動版；
package com
.anhui
.dajun
;import java
.sql
.Connection
;
import java
.sql
.DriverManager
;
import java
.sql
.ResultSet
;
import java
.sql
.SQLException
;
import java
.sql
.Statement
;public class JDBCUtil {private static final String URL
= "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8";private static final String DRIVERS
= "com.mysql.jdbc.Driver";private static final String USERNAME
= "root";private static final String PASSWORRD_STRING
= "root";public static void main(String
[] args
) {Connection connection
= null
;ResultSet rs
= null
;Statement stmt
= null
;try {try {Class
.forName(DRIVERS
);connection
= DriverManager
.getConnection(URL
, USERNAME
, PASSWORRD_STRING
);stmt
= connection
.createStatement();String sql
= "SELECT * FROM tt_user";rs
= stmt
.executeQuery(sql
);while (rs
.next()) {System
.out
.println("Id 是 : " + rs
.getString("id") + " | " + "姓名 : " + rs
.getString("name") + " | "+ "年齡 ： " + rs
.getString("age") + " | " + " 地址 : " + rs
.getString("address"));System
.out
.println("--------------------------------");}} catch (SQLException e
) {e
.printStackTrace();} catch (ClassNotFoundException e
) {e
.printStackTrace();}} finally {if (rs
!= null
) {try {rs
.close();} catch (SQLException e
) {e
.printStackTrace();}}if (stmt
!= null
) {try {stmt
.close();} catch (SQLException e
) {e
.printStackTrace();}}if (connection
!= null
) {try {connection
.close();} catch (SQLException e
) {e
.printStackTrace();}}}}}
;create table `tt_user
` (`id
` int ,`name
` varchar ,`age
` int ,`address
` varchar
);
insert into `tt_user
` (`id
`, `name
`, `age
`, `address
`) values('1','大軍','26','上海市');
insert into `tt_user
` (`id
`, `name
`, `age
`, `address
`) values('2','楊紅','24','云南');
insert into `tt_user
` (`id
`, `name
`, `age
`, `address
`) values('3','趙劉','27','陜西');
insert into `tt_user
` (`id
`, `name
`, `age
`, `address
`) values('4','李四','23','安徽');
insert into `tt_user
` (`id
`, `name
`, `age
`, `address
`) values('5','劉六','30','安徽安慶');
insert into `tt_user
` (`id
`, `name
`, `age
`, `address
`) values('6','王二','22','北京市');
insert into `tt_user
` (`id
`, `name
`, `age
`, `address
`) values('7','123','213','213');
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