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??Spring?AOP??????????

??????????????Spring AOP??????????????????????????AOP???

1. ??????POM??

???????????POM??????????????????Spring?AspectJ?

       
            
     
      junit
             
     
      junit
             
     
      4.11
             
     
      test
         
        
        
            
     
      org.springframework
             
     
      spring-context
             
     
      5.0.2.RELEASE
         
        
        
            
     
      org.aspectj
             
     
      aspectjweaver
             
     
      1.8.7
         
    
   

2. ??????????

??????????????????????

package com.ljf.spring.aop.service;public interface IAccountService {    void saveAccount();    void updateAccount(int i);    int deleteAccount();}

package com.ljf.spring.aop.service.impl;import org.springframework.stereotype.Service;@Service("accountService")public class AccountService implements IAccountService {    @Override    public void saveAccount() {        System.out.println("?????");        //int i = 1 / 0; // ??????????    }    @Override    public void updateAccount(int i) {        System.out.println("?????" + i);    }    @Override    public int deleteAccount() {        System.out.println("?????");        return 0;    }}

3. ???????????

??????AOP??????????????????????

package com.ljf.spring.aop.util;import org.aspectj.lang.ProceedingJoinPoint;import org.aspectj.lang.annotation.*;import org.springframework.stereotype.Component;@Component("logger")@Aspectpublic class Logger {    @Pointcut("execution(* com.ljf.spring.aop.service.impl.*.*(..))")    private void pt1() {}    @Before("pt1()")    public void beforePrintLog() {        System.out.println("?????Logger???beforePrintLog????????????");    }    @AfterReturning("pt1()")    public void afterReturningPrintLog() {        System.out.println("?????Logger???afterReturningPrintLog????????????");    }    @After("pt1()")    public void afterPrintLog() {        System.out.println("?????Logger???afterPrintLog????????????");    }    @Around("pt1()")    public Object aroundPringLog(ProceedingJoinPoint pjp) {        Object rtValue = null;        try {            Object[] args = pjp.getArgs();            System.out.println("Logger???aroundPringLog??????????????");            rtValue = pjp.proceed(args);            System.out.println("Logger???aroundPringLog??????????????");            return rtValue;        } catch (Throwable t) {            System.out.println("Logger???aroundPringLog??????????????");            throw new RuntimeException(t);        } finally {            System.out.println("Logger???aroundPringLog??????????????");        }    }}

4. ??Spring XML?????AOP

?Spring?XML????????????AOP??????????

5. ????

???????????????????

package com.ljf.spring.aop;import com.ljf.spring.aop.service.IAccountService;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class App {    public static void main(String[] args) {        ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");        IAccountService as = (IAccountService) ac.getBean("accountService");        as.saveAccount();    }}

??????????????????Spring AOP?????????????????????????????

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