Spring Annotation注解進行aop的學習，annotationaop
使用Maven管理項目，pom文件為：
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1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
2 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
3 <modelVersion>4.0.0</modelVersion>
4 <groupId>com.dzg</groupId>
5 <artifactId>spring_study</artifactId>
6 <version>0.0.1-SNAPSHOT</version>
7 <properties>
8 <maven.compiler.source>1.8</maven.compiler.source>
9 <maven.compiler.target>1.8</maven.compiler.target>
10 <maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>
11 </properties>
12
13 <dependencies>
14 <dependency>
15 <groupId>org.springframework</groupId>
16 <artifactId>spring-context</artifactId>
17 <version>4.3.2.RELEASE</version>
18 </dependency>
19 <!-- https://mvnrepository.com/artifact/junit/junit -->
20 <dependency>
21 <groupId>junit</groupId>
22 <artifactId>junit</artifactId>
23 <version>4.12</version>
24 </dependency>
25 <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjrt -->
26 <dependency>
27 <groupId>org.aspectj</groupId>
28 <artifactId>aspectjrt</artifactId>
29 <version>1.8.9</version>
30 </dependency>
31 <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
32 <dependency>
33 <groupId>org.aspectj</groupId>
34 <artifactId>aspectjweaver</artifactId>
35 <version>1.8.9</version>
36 </dependency>
37 <!-- https://mvnrepository.com/artifact/aopalliance/aopalliance -->
38 <dependency>
39 <groupId>aopalliance</groupId>
40 <artifactId>aopalliance</artifactId>
41 <version>1.0</version>
42 </dependency>
43
44 </dependencies>
45 </project>
pom.xml
建立User類：
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1 package com.dzg.spring.model;
2
3 public class User {
4 private int id;
5 private String password;
6 private String username;
7 public int getId() {
8 return id;
9 }
10 public String getPassword() {
11 return password;
12 }
13 public String getUsername() {
14 return username;
15 }
16 public void setId(int id) {
17 this.id = id;
18 }
19 public void setPassword(String password) {
20 this.password = password;
21 }
22 public void setUsername(String username) {
23 this.username = username;
24 }
25 }
User.java
建立UserService類：
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1 package com.dzg.spring.service;
2
3 import javax.annotation.Resource;
4
5 import org.springframework.stereotype.Component;
6
7 import com.dzg.spring.dao.UserDAO;
8 import com.dzg.spring.model.User;
9
10 @Component
11 public class UserService {
12
13 private UserDAO userDAO;
14
15 public void add(User user) {
16 userDAO.save(user);
17 }
18
19 public UserDAO getUserDAO() {
20 return userDAO;
21 }
22
23 public UserService() {
24
25 }
26
27 @Resource(name = "u")
28 public void setUserDAO(UserDAO userDAO) {
29 this.userDAO = userDAO;
30 }
31
32 }
UserService.java
建立UserDAO接口類：
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1 package com.dzg.spring.dao;
2
3 import com.dzg.spring.model.User;
4
5 public interface UserDAO {
6 public void save(User user);
7 }
UserDAO.java
建立實現UserDAO接口的實體類UserDAOImpl類：
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1 package com.dzg.spring.dao.impl;
2
3 import org.springframework.stereotype.Component;
4
5 import com.dzg.spring.dao.UserDAO;
6 import com.dzg.spring.model.User;
7
8 @Component("u")
9 public class UserDAOImpl implements UserDAO {
10
11 @Override
12 public void save(User user) {
13 System.out.println("user saved!");
14 }
15
16 }
UserDAOImpl.java
建立LogInterceptor類：
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1 package com.dzg.spring.aop;
2
3 import org.aspectj.lang.annotation.Aspect;
4 import org.aspectj.lang.annotation.Before;
5 import org.springframework.stereotype.Component;
6
7 @Aspect
8 @Component("log")
9 public class LogInterceptor {
10
11 @Before("execution(public void com.dzg.spring.dao.impl.UserDAOImpl.save(com.dzg.spring.model.User))")
12 public void beforeMethod() {
13 System.out.println("save start!");
14 }
15
16 }
LogInterceptor.java
beans.xml文件：
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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" xmlns:context="http://www.springframework.org/schema/context"
4 xmlns:aop="http://www.springframework.org/schema/aop"
5 xsi:schemaLocation="http://www.springframework.org/schema/beans
6 http://www.springframework.org/schema/beans/spring-beans.xsd
7 http://www.springframework.org/schema/context
8 http://www.springframework.org/schema/context/spring-context.xsd
9 http://www.springframework.org/schema/aop
10 http://www.springframework.org/schema/aop/spring-aop.xsd">
11
12 <context:annotation-config></context:annotation-config>
13 <context:component-scan base-package="com.dzg.spring"></context:component-scan>
14 <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
15 <!-- <bean id="userDAO" class="com.dzg.spring.dao.impl.UserDAOImpl"></bean>
16 <bean id="logInterceptor" class="com.dzg.spring.aop.LogInterceptor"></bean>
17 <bean id="userService" class="com.dzg.spring.service.UserService"> <property
18 name="UserDAO" ref="userDAO" /> </bean> -->
19 </beans>
beans.xml
測試代碼（使用的是junit測試）
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1 package com.dzg.spring.service;
2
3 import org.junit.Test;
4 import org.springframework.context.support.ClassPathXmlApplicationContext;
5
6 import com.dzg.spring.model.User;
7
8 public class UserServiceTest {
9
10 @Test
11 public void testAdd() throws Exception {
12 ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml");
13
14 UserService service = (UserService) ctx.getBean("userService");
15 System.out.println(service.getClass());
16 User u = new User();
17 u.setUsername("zhangsan");
18 u.setPassword("zhangsan");
19 service.add(u);
20 ctx.close();
21 }
22
23 }
UserServiceTest.java
控制台輸出：
class com.dzg.spring.service.UserService$$EnhancerBySpringCGLIB$$21c652e7
Method Around Start!
Method start!
user saved!
Method Around Complete!
Method Complete!
