校园商铺-2项目设计和框架搭建-9验证Service

1. 新建接口

main: com.csj2018.o2o.service/AreaService.java

package com.csj2018.o2o.service;
import java.util.List;
import com.csj2018.o2o.entity.Area;
public interface AreaService {
	List<Area> getAreaList();
}

2. 新建实现类

main: com.csj2018.o2o.service.impl/AreaServiceImpl.java

package com.csj2018.o2o.service.impl;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.csj2018.o2o.dao.AreaDao;
import com.csj2018.o2o.entity.Area;
import com.csj2018.o2o.service.AreaService;
@Service
public class AreaServiceImpl implements AreaService{
	@Autowired
	private AreaDao areaDao;
	@Override
	public List<Area> getAreaList(){
		return areaDao.queryArea();
	}
}

3. 修改基类

test: com.csj2018.o2o/BaseTest.java

package com.csj2018.o2o;

import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
/**
 * 配置spring和junit整合，junit启动式加载springIOC容器
 */
@RunWith(SpringJUnit4ClassRunner.class)
//告诉junit spring配置文件的位置
@ContextConfiguration({"classpath:spring/spring-dao.xml","classpath:spring/spring-service.xml"})
public class BaseTest {

}

4. 测试类

test: com.csj2018.o2o.service/AreaServiceTest.java

package com.csj2018.o2o.service;

import static org.junit.Assert.assertEquals;

import java.util.List;

import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;

import com.csj2018.o2o.BaseTest;
import com.csj2018.o2o.entity.Area;

public class AreaServiceTest extends BaseTest{
	@Autowired
	private AreaService areaService;
	@Test
	public void testGetAreaList() {
		List<Area> areaList = areaService.getAreaList();
		assertEquals("南苑",areaList.get(0).getAreaName());
	}

}

## 问题： ### 1.AreaServiceTest运行错误 ```#log 九月 21, 2019 6:21:41 下午 org.springframework.test.context.TestContextManager prepareTestInstance 严重: Caught exception while allowing TestExecutionListener [org.springframework.test.context.support.DependencyInjectionTestExecutionListener@2d554825] to prepare test instance [com.csj2018.o2o.service.AreaServiceTest@26abb146] org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'com.csj2018.o2o.service.AreaServiceTest': Unsatisfied dependency expressed through field 'areaService'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.csj2018.o2o.service.AreaService' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} ... Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.csj2018.o2o.service.AreaService' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1486) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1104) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585) ... ```

原因：
1. spring-service.xml文件配置错误 ，修正即可
2. AreaServiceImpl.java是否缺少注释，如Controller注解