java JDBC (六) org.apache.commons.dbutils 增删改

dbutils是apache封装了JDBC的工具类，比mysql-connector更方便些

下载地址：http://commons.apache.org/proper/commons-dbutils/download_dbutils.cgi

database.properties：

driver = com.mysql.jdbc.Driver
url = jdbc:mysql://192.168.0.207:3306/mydb
user = root
pwd = Console.Write21

package cn.sasa.demo5;

import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Properties;

public class DBProperties {
    public static String driver = "";
    public static String url = "";
    public static String user = "";
    public static String pwd = "";
    
    static {
        // 类的加载器
        try {
            InputStream input = DBProperties.class.getClassLoader().getResourceAsStream("database.properties");
            Properties properties = new Properties();
            properties.load(input);
            driver = properties.getProperty("driver");
            url = properties.getProperty("url");
            user = properties.getProperty("user");
            pwd = properties.getProperty("pwd");
        }catch(IOException ex) {
            
        }    
    }
    
    public static Connection getConnection() throws SQLException, ClassNotFoundException {
        Class.forName(driver);
        Connection conn = DriverManager.getConnection(url, user, pwd);
        return conn;
    }
}

package cn.sasa.demo5;

import java.sql.Connection;
import java.sql.SQLException;

import org.apache.commons.dbutils.DbUtils;
import org.apache.commons.dbutils.QueryRunner;

public class QueryRunnerDemo {
    public static void main(String[] args) throws SQLException, ClassNotFoundException {
        Connection conn =DBProperties.getConnection();
        
        //创建QueryRunner对象
        QueryRunner query = new QueryRunner();
        
//        String sql = "INSERT INTO `product` (`pname`, `price`, `ptype`) VALUES ( ?, ?, ?);";
//        Object[] params = {"键盘",100,"计算机配件"};
//        int row = query.update(conn, sql, params);
        
        String sql = "UPDATE product SET price=? WHERE pid=?";
        Object[] params = {222,11};
        int row = query.update(conn, sql, params);
    
//        String sql = "DELETE FROM product WHERE pid=?";
//        int row = query.update(conn, sql, 10);
        
        System.out.println(row);
        //释放资源
        DbUtils.closeQuietly(conn);
    }
}