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
}

}