Mysql总结_04_JAVA使用JDBC连接MySQL数据库

1.下载 mysql驱动

截止目前最新驱动： mysql-connector-java-5.1.41-bin.jar

官方下载地址：http://www.mysql.com/downloads/connector/j/

2.添加驱动jar包到eclipse中

三个方法：

（1）添加到tomcat的lib文件夹下,再将之build path到项目中

（2）项目右键—>build path—>configure build path—>java build path—>libraries—>Add External Jars

 (3)  项目右键—>build path—>configure build path—>java build path—>libraries—>Add  Jars

 

3.数据库连接类

package com.ray.helloworld;

import java.sql.Connection;  
import java.sql.DriverManager;  
import java.sql.SQLException;  
  
public class DBHelper {  
    public static final String url = "jdbc:mysql://127.0.0.1/test";  
    public static final String name = "com.mysql.jdbc.Driver";  
    public static final String user = "root";  
    public static final String password = "123";  
  
    public Connection conn = null;  

  
    public DBHelper() {  
        try {  
            //1.加载数据库驱动
            Class.forName(name); 
            //2.与数据库建立连接
            conn = DriverManager.getConnection(url, user, password);
            
            if(!conn.isClosed())
                System.out.println("成功连接数据库");
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
  
    
    
    
    public void close() {  
        try {  
            this.conn.close();  
           // this.pst.close();  
        } catch (SQLException e) {  
            e.printStackTrace();  
        }  
    }  
}  

4.测试类

package com.ray.helloworld;
import java.sql.ResultSet;  
import java.sql.SQLException;  
  
public class TestDBHelper {  
  
    static String sql = null;  
    static DBHelper db1 = null;  
    static ResultSet ret = null;  
  
    public static void main(String[] args) {  
         try { 
      
        db1 = new DBHelper();
        
        System.out.println(db1);
            db1.close();//关闭连接  
            
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }  
  
}