Java使用JDBC的Statement对象查询数据库示例

一.数据表结构

CREATE TABLE `userinfo` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `username` varchar(50) DEFAULT NULL,
  `pwd` varchar(50) DEFAULT NULL,
  `inDate` datetime DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=15 DEFAULT CHARSET=utf8;

二.示例代码

package cn.wdl.db;

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

public class JDBCTest {

    public static void main(String[] args) {
        try {
            Class.forName("com.mysql.jdbc.Driver");
            String url="jdbc:mysql://127.0.0.1:3306/soft18?characterEncoding=UTF-8";
            //访问MySQL数据库的用户名
            String username="root";
            //访问MySQL的密码
            String pwd="XXXXXX";
            
            Connection conn  = DriverManager.getConnection(url,username,pwd);
            
            Statement stmt  = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);
            
            String sql="select * from userinfo where username='wangdl' and pwd='wdl'";
            ResultSet rs = stmt.executeQuery(sql);
            while(rs.next()) {
                System.out.print(rs.getInt("id")+"\t"+rs.getString("username")+"\t"+rs.getString("pwd"));
            }
            
        }catch(ClassNotFoundException ex) {
            ex.printStackTrace();
        }catch(SQLException ex1) {
            ex1.printStackTrace();
        }

    }

}