使用DbUtils实现CRUD

commons-dbutils 这是 Apache 提供了一个开源组织 JDBC工具库，它是JDBC简包，学习成本低，和使用dbutils可以大大简化jdbc的工作量，同一时候也不会影响程序的性能。因此dbutils成为非常多不喜欢hibernate的公司的首选。

/**
 * DbUtils的使用方法:利用DbUtils实现增删改查操作
 * @project_name Day12
 * @class_name DbUtilsDemo1
 * @author Dovinya
 * @data 2014-8-27 下午11:07:09
 * @version 1
 * @notes
 */
/*
 create database day12;
 use day12;
 create table table1 (
 	id int primary key auto_increment,
 	name varchar(20),
 	salary double
 );
 
 insert into table1 values(null,'zhang',234.5);
 insert into table1 values(null,'li',234.5);
 insert into table1 values(null,'wang',3242);
 insert into table1 values(null,'zhao',32543);
 insert into table1 values(null,'pan',4654);
 insert into table1 values(null,'he',4235);
 
 *
 */
public class DbUtilsDemo1 {
	/*
	 * 利用DbUtils实现更改操作
	 */
	public void update() throws SQLException {
 
			//获取数据源对象
			QueryRunner runner = new QueryRunner(new ComboPooledDataSource());
			runner.update("update table1 set salary =100");
	}
 
	@Test
	public void add() throws SQLException{
		//获取数据源对象
		QueryRunner runner = new QueryRunner(new ComboPooledDataSource());
		runner.update("insert into table1 values(1,?
 
,?)","lisi",1000);
	}
	@Test
	public void delete() throws SQLException{
		//获取数据源对象
		QueryRunner runner = new QueryRunner(new ComboPooledDataSource());
		runner.update("delete from table1 where name = 'lisi'");
	}
 
	@Test
	public void query() throws SQLException{
		//获取数据源对象
		QueryRunner runner = new QueryRunner(new ComboPooledDataSource());
		List<User> list = runner.query("select *from table1 where id<?
 
", new ResultSetHandler<List<User>>(){
 
			@Override
			public List<User> handle(ResultSet rs) throws SQLException {
 
				List<User> list = new ArrayList<User>();
				while(rs.next()){
					User user = new User();
					user.setId(rs.getInt("id"));
					user.setName(rs.getString("name"));
					user.setSalary(rs.getDouble("salary"));
 
					list.add(user);
				}
 
				return list;
			}
 
		}, 5);
 
		System.out.println(list); //这里能够加断点调试观察
	}
 
}

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