c3p0--jdbc基本操作二

package text;

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

import com.mchange.v2.c3p0.ComboPooledDataSource;

public class c3p0_01 {
	
	public static void main(String[] args) throws SQLException {
		
		ComboPooledDataSource c3p0pool = new ComboPooledDataSource("dev");
		Connection connection = c3p0pool.getConnection();
		//增 删 改 查
		//增
		/*
		String sql = "insert into users values(?,?,?,?)";
		PreparedStatement prepareStatement = connection.prepareStatement(sql);
		prepareStatement.setInt(1,2);
		prepareStatement.setString(2,"guo");
		prepareStatement.setString(3,"[email protected]");
		prepareStatement.setString(4,"guoasdsad");
		int i = prepareStatement.executeUpdate();
		
		System.out.println("成功增加"+i+"条数据");
		*/
		//删
		/*
		String sql = "delete from users where id = ?";
		PreparedStatement prepareStatement = connection.prepareStatement(sql);
		prepareStatement.setInt(1,2);
		int i = prepareStatement.executeUpdate();
		
		System.out.println("成功删除"+i+"条数据");
		*/
		//改
		/*
		String sql = "update users set name = ? where id = ?";
		PreparedStatement prepareStatement = connection.prepareStatement(sql);
		prepareStatement.setString(1,"guo123");
		prepareStatement.setInt(2,1);
		int i = prepareStatement.executeUpdate();
		
		System.out.println("成功修改"+i+"条数据");
		*/
		
		//查
		String sql = "select * from users where id = ?";
		PreparedStatement prepareStatement = connection.prepareStatement(sql);
		prepareStatement.setInt(1,1);
		ResultSet i = prepareStatement.executeQuery();
		
		while(i.next()) {
			System.out.println(i.getString("name"));
		}
		i.close();
		prepareStatement.close();
		connection.close();
		c3p0pool.close();
		
	}
}