AopContext.currentProxy()
原来在springAOP的用法中,只有代理的类才会被切入,我们在controller层调用service的方法的时候,是可以被切入的,但是如果我们在service层 A方法中,调用B方法,切点切的是B方法,那么这时候是不会切入的,解决办法就是如上所示,在A方法中使用((Service)AopContext.currentProxy()).B() 来调用B方法,这样一来,就能切入了!
AopContext.currentProxy()该用法的意义
具体的用法在下面的代码中可以体会:
@Configuration
@ComponentScan("com.dalianpai.spring5.aop")
@EnableAspectJAutoProxy(exposeProxy = true)//开启spring注解aop配置的支持
public class SpringConfiguration {
}
public class User implements Serializable {
private String id;
private String username;
private String password;
private String email;
private Date birthday;
private String gender;
private String mobile;
private String nickname;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public String getMobile() {
return mobile;
}
public void setMobile(String mobile) {
this.mobile = mobile;
}
public String getNickname() {
return nickname;
}
public void setNickname(String nickname) {
this.nickname = nickname;
}
}
@Service("userService")
public class UserServiceImpl implements UserService {
@Override
public void saveUser(User user) {
System.out.println("执行了保存用户"+user);
}
@Override
public void saveAllUser(List<User> users) {
for(User user : users){
UserService proxyUserServiceImpl = (UserService)AopContext.currentProxy();
proxyUserServiceImpl.saveUser(user);
}
}
}
public interface UserService {
/**
* 模拟保存用户
* @param user
*/
void saveUser(User user);
/**
* 批量保存用户
* @param users
*/
void saveAllUser(List<User> users);
}
@Component
@Aspect//表明当前类是一个切面类
public class LogUtil {
/**
* 用于配置当前方法是一个前置通知
*/
@Before("execution(* com.dalianpai.spring5.aop.service.impl.*.saveUser(..))")
public void printLog(){
System.out.println("执行打印日志的功能");
}
}
测试类:
public class SpringEnableAspecctJAutoProxyTest {
public static void main(String[] args) {
//1.创建容器
AnnotationConfigApplicationContext ac = new AnnotationConfigApplicationContext(SpringConfiguration.class);
//2.获取对象
UserService userService = ac.getBean("userService",UserService.class);
//3.执行方法
User user = new User();
user.setId("1");
user.setUsername("test");
List<User> users = new ArrayList<>();
users.add(user);
userService.saveAllUser(users);
}
}
如果去掉这行UserService proxyUserServiceImpl = (UserService)AopContext.currentProxy();