Spring中的Jdbc

项目结构图：

(1)创建java project
(2)创建数据库(mysql)
create database mydb;
create table t_user(user_id int primary key auto_increment,username varchar(20),password varchar(20));
insert into t_user(username,password) values('java','1234');
insert into t_user(username,password) values('php','1234');

(3)添加spring类库

commons-logging.jar
log4j-1.2.15.jar
spring.jar
aspectjrt.jar(可选)
aspectjweaver.jar(可选)
(4)在src下添加spring配置文件
applicationContext.xml
log4j.properties
 建议：
      在搭建框架使用debug模式，
      开发程序使用info模式
(5)实体类
   com.tarena.entity.User
(6)连接数据库
   添加mysql驱动库：
      mysql-connector-java-5.1.16.jar
   在spring配置文件中配置：

<!-- 连接数据库 -->
	<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
		<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
		<property name="url" value="jdbc:mysql://127.0.0.1:3306/lirui"/>
		<property name="username" value="root"/>
		<property name="password" value="865631572"/>
	</bean>

(7)编写DAO
(a)IUserDao接口类

public interface IUserDao {
	int saveUser(User user);
	int deleteUserById(User user);
	int updateUserById(User user);
	
	List<Map<String,Object>> findAllUser();
	int countUser();
	User findUserById(User user);
	List<User> findAll();
}

(b)UserDaoImpl实现类

public class UserDaoImpl extends JdbcDaoSupport implements IUserDao {

	@Override
	public int saveUser(User user) {
		String sql = "insert into t_user(username,password) values(?,?)";
		return this.getJdbcTemplate().
			update(sql, new Object[]{
					user.getUsername(),user.getPassword()
			});
	}

	@Override
	public int deleteUserById(User user) {
		String sql = "delete from t_user where user_id=?";
		return this.getJdbcTemplate().update(sql, new Object[]{user.getUserId()});
	}

	@Override
	public int updateUserById(User user) {
		String sql = "update t_user set username=? where user_id=?";
		return this.getJdbcTemplate().update(sql, new Object[]{user.getUsername(),user.getUserId()});
	}

	@Override
	public int countUser() {
		String sql = "select count(*) from t_user";
		return this.getJdbcTemplate().queryForInt(sql);
	}

	@SuppressWarnings("unchecked")
	@Override
	public List<User> findAll() {
		String sql = "select * from t_user";
		
		return this.getJdbcTemplate().query(sql, new RowMapper(){

			@Override
			public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
				User user = new User();
				user.setUserId(rs.getInt("user_id"));
				user.setUsername(rs.getString("username"));
				user.setPassword(rs.getString("password"));
				return user;
			}});
	}

	@SuppressWarnings("unchecked")
	@Override
	public List<Map<String, Object>> findAllUser() {
		String sql = "select * from t_user";
		return this.getJdbcTemplate().queryForList(sql);
	}

	@Override
	public User findUserById(User user) {
		String sql = "select * from t_user where user_id = ?";
		return (User)this.getJdbcTemplate().queryForObject(sql,new Object[]{user.getUserId()}, new RowMapper(){

			@Override
			public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
				User user = new User();
				user.setUserId(rs.getInt("user_id"));
				user.setUsername(rs.getString("username"));
				user.setPassword(rs.getString("password"));
				return user;
			}});
	}

}

(c)在spring配置文件中配置UserDaoImpl

   <!-- dao -->
   <bean id="userDaoImpl" class="com.tarena.dao.impl.UserDaoImpl">
      <property name="dataSource" ref="dataSource"/>
   </bean>

其中name="dataSource"中不可改,因为UserDaoImpl继承JdbcDaoSupport类,这个类中有一个setDataSource(DataSource datasource)方法,采用的是Spring set方式

(8)测试
静态导包：
(1)jdk5.0以上
(2)方法必须是static修改方法
使用:
(1)import static 包名.静态方法名   例:import static org.junit.Assert.assertEquals;
(2)静态方法名(...)
   

//断言：预计值与实际值比较
assertEquals(预计值,实际值);     
UserDaoImplTest测试类:

 public class UserDaoImplTest {
 	private IUserDao iuserDao = null;
	@Before
	public void setUp(){
		ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");	
		iuserDao=(IUserDao)ac.getBean("userDaoImpl");
	}
	
	@Test
	@Ignore
	public void testSaveUser(){
		//IUserDao iuserDao = new UserDaoImpl();
	    User user = new User();
		user.setUsername("净净");
		user.setPassword("1234");
		int row= iuserDao.saveUser(user);
		//断言：预计值,实际值比较
		//assertEquals(预计值,实际值);
		assertEquals(1,row);
	}
	
	@Test
	@Ignore
	public void testDeleteUserById(){
		User user = new User();
		user.setUserId(3);
		int row = iuserDao.deleteUserById(user);
		assertEquals(1, row);
	}
	@Test
	@Ignore
	public void testUpdateUserById(){
		User user = new User();
		user.setUserId(5);
		user.setUsername("八戒");
		int row = iuserDao.updateUserById(user);
		assertEquals(1, row);
	}
	
	@Test
	@Ignore
	public void testFindAllUser(){
	  List<Map<String,Object>> list=iuserDao.findAllUser();	
	  /*for (Map<String, Object> map : list) {
		 System.out.println(map.get("user_id")+" "+
				            map.get("username")
		  		 
		 );
	  }*/
	  assertEquals(5, list.size());
	}
	@Test
	@Ignore
	public void testCountUser(){
		System.out.println(iuserDao.countUser());
	}
	
	@Test
	@Ignore
	public void testFindUserById(){
		User user = new User();
		user.setUserId(1);
		User u = iuserDao.findUserById(user);
		System.out.println(u.getUsername());
	}
	@Test
	public void testFindAll(){
		List<User> users = iuserDao.findAll();
		for (User user : users) {
			System.out.println(user.getUserId()+" "+
		                       user.getUsername()+" "+
		                       user.getPassword()
			);
			
		}
	}