JDBC PreparedStatement实现数据库的添加操作

PrepardStatement实现数据库的添加操作

package com.cloud.preparedstatement.crud;

import com.cloud.statement.crud.StatementTest;
import org.junit.Test;

import java.io.InputStream;
import java.sql.*;
import java.text.SimpleDateFormat;
import java.util.Properties;
import java.util.SimpleTimeZone;

/*
* 使用PreparedStatement来替换Statement，实现对数据表的增删改查操作
*增删改，查
*/
public class PreparedStatementUpdateTest {
    //向customers表中添加一条记录
    @Test
    public void testInsert(){
        Connection conn = null;
        PreparedStatement ps = null;
        try {
            //1.读取配置文件中的4个基本信息
//        InputStream is = PreparedStatementUpdateTest.class.getClassLoader().getResourceAsStream("jdbc.properties");
            InputStream is = ClassLoader.getSystemClassLoader().getResourceAsStream("jdbc.properties");
            Properties pros = new Properties();
            pros.load(is);

            String user = pros.getProperty("user");
            String password = pros.getProperty("password");
            String url = pros.getProperty("url");
            String driverClass = pros.getProperty("driverClass");

            //2.加载驱动
            Class.forName(driverClass);

            //3.获取连接
            conn = DriverManager.getConnection(url,user,password);

            System.out.println(conn);

            //4.预编译sql语句，返回PreparedStatement的实例
            String sql = "insert into customers(name,email,birth)values(?,?,?)";
            ps = conn.prepareStatement(sql);
            //5.填充占位符
            ps.setString(1,"哪吒");
            ps.setString(2,"nazha@gmail.com");
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            java.util.Date date = sdf.parse("1000-01-01");
            ps.setDate(3,new Date(date.getTime()));
            //6.执行操作
            ps.execute();
            System.out.println("插入数据成功！");
        }catch (Exception e)
        {
            e.printStackTrace();
        }finally {
            //7.资源的关闭
            try {
                if (ps!=null)
                ps.close();
            }catch (SQLException e)
            {
                e.printStackTrace();
            }
            try{
                if (conn!=null )
                conn.close();
            }catch (SQLException e)
            {
                e.printStackTrace();;
            }
        }
    }
}

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