使用JDBC操作數據庫

準備工作

1.創建一個java項目導入mysql驅動包

2.在src目錄中創建一個新的Java類

 

JDBC查詢:

package com.ATedu.test;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class jdbctest {    
    public static void main(String[] args) {

        //鏈接對象
        Connection con=null;
        //查詢對象
        PreparedStatement ps=null;
        //結果集對象
        ResultSet rs=null;
        
        
        try {
            //加載數據庫驅動
            Class.forName("com.mysql.jdbc.Driver");
            
            //獲取連接 
            String url="jdbc:mysql://localhost:3306/ssm_mybatis?useSSL=false";
            String user="root";
            String password="a123456";
            con=DriverManager.getConnection(url, user, password);
            
            //查詢語句
            String sql="select * from user where u_sex = ?";
            //獲取statement
            ps=con.prepareStatement(sql);
            ps.setString(1, "0");
            
            //查詢輸出結果
            rs=ps.executeQuery();
            
            while(rs.next()) {
                System.out.println(rs.getString("u_id")+"   "+rs.getString("u_username")+"  "+rs.getString("u_sex"));
            }
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            try {
                rs.close();
                ps.close();
                con.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        
    }
}