java web 连接mysql

1.创建数据库

1 create database jdbc;

2.创建数据表

1 create table create table stu10( id int(10) primary key auto_increment, name varchar(20) not null, age varchar(10) not null, address varchar(20) not null);

3.通过insert语句增加数据

1 insert into stu10 values(1,‘码-奴‘,‘20‘,‘浙江嘉兴‘);

 4.创建连接数据库类

 1 package com.tu.jdbc;
 2
 3 import java.sql.Connection;
 4 import java.sql.DriverManager;
 5 import java.sql.SQLException;
 6
 7 public class Jdbc_con {
 8     public Connection getConnection(){
 9         try {
10             //加载数据库驱动
11             Class.forName("com.mysql.jdbc.Driver");
12             //连接数据库
13             return DriverManager.getConnection("jdbc:mysql://localhost:3306/jdbc","root","123");
14         } catch (Exception e) {
15             // TODO Auto-generated catch block
16             e.printStackTrace();
17         }
18         return null;
19     }
20
21     public void closeConection(Connection con){
22         if(con!=null){
23             try {
24                 con.close();
25             } catch (SQLException e) {
26                 // TODO Auto-generated catch block
27                 e.printStackTrace();
28             }
29         }
30     }
31 }

5.创建测试类

 1 package com.tu.jdbc;
 2
 3 import java.sql.Connection;
 4 import java.sql.ResultSet;
 5 import java.sql.SQLException;
 6 import java.sql.Statement;
 7
 8 public class Test {
 9
10     public static void main(String[] args) {
11         Test ts = new Test();
12         ts.list();
13
14     }
15
16     public void list() {
17         Jdbc_con jc = new Jdbc_con();
18         Connection jdbc = jc.getConnection();
19         String sql = "select id,name from stu10";
20         try {
21             Statement sm = jdbc.createStatement();
22             ResultSet rs = sm.executeQuery(sql);
23             while (rs.next()) {
24                 int id = rs.getInt(1);
25                 String name = rs.getString(2);
26                 System.out.println(id + name);
27             }
28         } catch (SQLException e) {
29             // TODO Auto-generated catch block
30             e.printStackTrace();
31         }
32
33     }
34 }