Spring註解AOP及單元測試junit(6)

2019-03-10/20:19:56

演示:將xml配置方式改為註解方式

靜態以及動態代理推薦博客:https://blog.csdn.net/javazejian/article/details/56267036

junit單元測試jar包:https://share.weiyun.com/5pKuXVL

1.註解配置業務類

　　使用@Component("s") 註解ProductService 類表示業務類的Bean名字為 s 

 1 package service;
 2  
 3 import org.springframework.stereotype.Component;
 4  
 5 @Component("s")
 6 public class ProductService {
 7     public void doSomeService(){
 8         System.out.println("doSomeService");
 9     }
10      
11 }

2.註解配置切麵AOP

　　@Aspect 註解表示這是一個切麵
　　@Component 表示這是一個bean,由Spring進行管理
　　在切麵類的具體的方法前加上一句，表示這個切點被觸發的時候，執行該函數，用Around方式，相當於把這個切點和這個切點的處理方法關聯起來。

　　@Around(value = "execution(* service.ProductService.*(..))") 表示對service.ProductService 這個類中的所有方法進行切麵操作.

　　含義就是，當expression中的函數被調用時，就會用around形式來觸發切麵函數，這條語句放在誰前面，誰就被定義為切麵函數，也就是輔助功能。 

 1 package aspect;
 2 import org.aspectj.lang.ProceedingJoinPoint;
 3 import org.aspectj.lang.annotation.Around;
 4 import org.aspectj.lang.annotation.Aspect;
 5 import org.springframework.stereotype.Component;
 6  
 7 @Aspect
 8 @Component
 9 public class LoggerAspect {
10      
11     @Around(value = "execution(* service.ProductService.*(..))")
12     public Object log(ProceedingJoinPoint joinPoint) throws Throwable {
13         System.out.println("start log:" + joinPoint.getSignature().getName());
14         Object object = joinPoint.proceed();
15         System.out.println("end log:" + joinPoint.getSignature().getName());
16         return object;
17     }
18 }

3.配置文件applicationContext.xml

　　去掉原有的配置添加三行配置　　

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xmlns:aop="http://www.springframework.org/schema/aop"
 5     xmlns:tx="http://www.springframework.org/schema/tx"
 6     xmlns:context="http://www.springframework.org/schema/context"
 7     xsi:schemaLocation="
 8    http://www.springframework.org/schema/beans
 9    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
10    http://www.springframework.org/schema/aop
11    http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
12    http://www.springframework.org/schema/tx
13    http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
14    http://www.springframework.org/schema/context     
15    http://www.springframework.org/schema/context/spring-context-3.0.xsd">
16   
17     <context:component-scan base-package="aspect"/>
18     <context:component-scan base-package="service"/>
19     <aop:aspectj-autoproxy/> 
20    
21 </beans>

 4.單元測試junit

　　1.下載jar包地址在文章引用部分   junit-4.12.jar和hamcrest-all-1.3.jar    記得Add

　　2.修改TestSpring

　　@RunWith(SpringJUnit4ClassRunner.class) 表示這是一個Spring的測試類

　　@ContextConfiguration("classpath:applicationContext.xml")定位Spring的配置文件

　　@Autowired給這個測試類裝配Category對象

　　@Test測試邏輯，列印c對象的名稱

　　3.單元測試用的例子是博主SpringIOC/DI這篇文章中的例子參考鏈接https://www.cnblogs.com/bencoper/p/10494369.html

　　4.所有代碼

　TestSpring　

 1 package test;
 2  
 3 import org.junit.Test;
 4 import org.junit.runner.RunWith;
 5 import org.springframework.beans.factory.annotation.Autowired;
 6 import org.springframework.test.context.ContextConfiguration;
 7 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 8  
 9 import pojo.Category;
10  
11 @RunWith(SpringJUnit4ClassRunner.class)
12 @ContextConfiguration("classpath:applicationContext.xml")
13 public class TestSpring {
14     @Autowired
15     Category c;
16  
17     @Test
18     public void test(){
19         System.out.println(c.getName());
20     }
21 }

 1 package com.how2java.test;
 2 
 3 import org.springframework.context.ApplicationContext;
 4 
 5 import org.springframework.context.support.ClassPathXmlApplicationContext;
 6 
 7 import pojo.Category;
 8 
 9 public class TestSpringOldWay {
10 
11     public static void main(String[] args) {
12         ApplicationContext context = new ClassPathXmlApplicationContext(new String[] { "applicationContext.xml" });
13 
14         Category c = (Category) context.getBean("c");
15 
16         System.out.println(c.getName());
17     }
18 }

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xmlns:aop="http://www.springframework.org/schema/aop"
 5     xmlns:tx="http://www.springframework.org/schema/tx"
 6     xmlns:context="http://www.springframework.org/schema/context"
 7     xsi:schemaLocation="
 8    http://www.springframework.org/schema/beans 
 9    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
10    http://www.springframework.org/schema/aop 
11    http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
12    http://www.springframework.org/schema/tx 
13    http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
14    http://www.springframework.org/schema/context      
15    http://www.springframework.org/schema/context/spring-context-3.0.xsd">
16  
17     <bean name="c" class="pojo.Category">
18         <property name="name" value="category 1" />
19     </bean>
20  
21 </beans>

 1 package pojo;
 2  
 3 public class Category {
 4     private int id;
 5     private String name;
 6  
 7     public int getId() {
 8         return id;
 9     }
10     public void setId(int id) {
11         this.id = id;
12     }
13     public String getName() {
14         return name;
15     }
16     public void setName(String name) {
17         this.name = name;
18     }
19 
20 }

 測試結果