jdbc工具

package com.song.testjdbc.lesson2.utils;

import java.io.IOException;
import java.io.InputStream;
import java.sql.*;
import java.util.Properties;

public class JdbcUtils {
    private static String driver=null;
    private static String url=null;
    private static String username=null;
    private static String password=null;
    static{
        try{
            InputStream in = JdbcUtils.class.getClassLoader().getResourceAsStream("db.properties");
            Properties properties = new Properties();
            properties.load(in);
            driver = properties.getProperty("drive");
            url = properties.getProperty("url");
            username = properties.getProperty("username");
            password = properties.getProperty("password");
            //驱动加载
            Class.forName(driver);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    //获取连接
    public static Connection getconnection() throws SQLException {
        return DriverManager.getConnection(url,username,password);
    }
    //释放资源
    public static void release(Connection connection, Statement statement, ResultSet resultSet) throws SQLException {
        if (connection!=null){
            connection.close();
        }
        if (statement!=null){
            statement.close();
        }
        if (resultSet!=null){
            resultSet.close();
        }
    }
}

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/tb_user?useUnicode=true&characterEncoding=utf8&useSSL=true
username=root
password=123456

package com.song.testjdbc.lesson2;

import com.song.testjdbc.lesson2.utils.JdbcUtils;

import java.sql.*;

public class testinsert {
    public static void main(String[] args) throws SQLException {
        Connection connection=null;
        Statement statement = null;
        ResultSet resultSet = null;
        try {
            connection = JdbcUtils.getconnection();//获取数据库
            statement = connection.createStatement();//获取sql的执行对象
            String sql = "INSERT into tb_user(userid,username,userPwd,userAge) VALUES (44,'啊song','111','11')";
            int i = statement.executeUpdate(sql);
            if (i>0){
                System.out.println("插入成功");
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            JdbcUtils.release(connection,statement,resultSet);
        }
    }
}

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