Spring2.5注解实例+Junit4注解测试方法

Eclipse导入jar文件,spring-test.jar,spring.jar(版本2.5),junit-4.4.jar

Spring的IOC注入的方式有:setter方式,构造函数方式,注解方式。

注解方式可以在xml文件中对整个文件夹的bean配置,注入的时候通过注解标签调用,使代码更加简洁,易于维护。

通过一个简单的例子+测试来说明:

dao.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans
	xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
	<context:component-scan
		base-package="org.zlex.spring.dao" />
</beans>

 context:component-scan配置包的路径。

AccountDao.java

package org.zlex.spring.dao;

import org.zlex.spring.domain.Account;

public interface AccountDao {
	/**
	 * 读取用户信息
	 * 
	 * @param username
	 * @return
	 */
	Account read(String username);
}

 AccountDaoImpl.java

package org.zlex.spring.dao.impl;

import org.springframework.stereotype.Component;
import org.springframework.stereotype.Repository;
import org.zlex.spring.dao.AccountDao;
import org.zlex.spring.domain.Account;

@Component("accountDao")
public class AccountDaoImpl implements AccountDao {

	public Account read(String username) {
		return new Account(username,"wolf");
	}
}

@Component注解表示bean的名字为accountDao,可以写成其他的名字。

@Repository注解作用同上,但是bean的名字同类名,方法名第一个字母小写。

Test.java测试类

package org.zlex.spring.test;

import org.junit.After;
import org.junit.Before;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.zlex.spring.dao.AccountDao;
import org.zlex.spring.domain.Account;


@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath:dao.xml"})   
public class Test2 extends AbstractJUnit4SpringContextTests {
  @Autowired
    AccountDao accountDao;
	
  @Before
  public void setUp() throws Exception{
	System.out.println("setUp ...");
  }
    @After
    public void tearDown() throws Exception{
    	System.out.println("tearDown ...");
    }
    
   @org.junit.Test
    public void findAll()
    {
    	Account account = accountDao.read("中国");
		
	System.out.println(account.getUsername());
	System.out.println(account.getPassword());
   }

}

 @Autowired自动注入注解标签。也可以通过@Resource(name="accountDao")来注入。

posted @ 2013-05-03 13:50  全新时代-小小程序员大梦想  阅读(403)  评论(0编辑  收藏  举报