簡介
Spring提供spring-test-5.2.1.RELEASE.jar 可以整合junit。
優勢：可以簡化測試代碼（不需要手動創建上下文，即手動創建spring容器）
使用spring和junit集成的步驟
1.導入jar包
2.創建包com.igeek.test,創建類SpringTest
通過@RunWith注解，使用junit整合spring
通過@ContextConfiguration注解，指定spring容器的位置
3.通過@Autowired注解，注入需要測試的對象
在這里注意兩點：
將測試對象注入到測試用例中
測試用例不需要配置<context:component-scan base-package="com.igeek"/></context:component-scan>，因為使用測試類運行的時候，會自動啟動注解的支持(僅對該測試類啟用)
舉例說明一下
1.第一種：在applicationContext.xml中不開啟注解掃描
配置文件:
<?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:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop
https://www.springframework.org/schema/aop/spring-aop.xsd">
<bean id="userService" class="com.igeek.service.impl.UserServiceImpl"></bean>
</beans>
service層:
public class UserServiceImpl implements IUserService {
@Override
public void save() {
System.out.println("save...");
}
}
測試類:
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class Test01 {
@Autowired
private IUserService userService;
@Test
public void test01(){
userService.save();
}
}
2.第二種：在applicationContext.xml中開啟注解掃描
配置文件:
<?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:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop
https://www.springframework.org/schema/aop/spring-aop.xsd">
<!--開啟注解掃描-->
<context:component-scan base-package="com.igeek"></context:component-scan>
</beans>
service層:
@Service("userService")
public class UserServiceImpl implements IUserService {
@Override
public void save() {
System.out.println("save...");
}
}
測試類:
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class Test01 {
@Autowired
private IUserService userService;
@Test
public void test01(){
userService.save();
}
}