一、AOP
目前创新互联建站已为成百上千家的企业提供了网站建设、域名、网络空间、网站运营、企业网站设计、寻乌网站维护等服务，公司将坚持客户导向、应用为本的策略，正道将秉承"和谐、参与、激情"的文化，与客户和合作伙伴齐心协力一起成长，共同发展。
AOP为Aspect Oriented Programming的缩写，意为：面向切面编程，通过预编译方式和运行期动态代理实现程序功能的统一维护的一种技术。 AOP是OOP的延续，是软件开发中的一个热点，也是Spring框架中的一个重要内容，是函数式编程的一种衍生范型。
二、实现
引入依赖
org.springframework.boot spring-boot-starter-aop org.springframework.boot spring-boot-starter-web org.springframework.boot spring-boot-starter-test test
新建SysLog类
package com.example.aop.annotation;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface SysLog {
String value() default " ";
}
新建SysLogAspect类
package com.example.aop.annotation;
import com.example.aop.service.LogService;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import java.lang.reflect.Method;
@Aspect
@Component
public class SysLogAspect {
@Autowired
private LogService logService;
@Pointcut("@annotation(com.example.aop.annotation.SysLog)")
public void logPointCut() {}
@Before("logPointCut()")
public void before(JoinPoint joinPoint) {
long beginTime = System.currentTimeMillis();
MethodSignature signature = (MethodSignature) joinPoint.getSignature();
Method method = signature.getMethod();
SysLog annotation = method.getAnnotation(SysLog.class);
String value = annotation.value();
Object[] args = joinPoint.getArgs();
try {
logService.log(beginTime, "before " + method.getName());
} catch (Exception e) {
}
}
@Around("logPointCut()")
public Object around(ProceedingJoinPoint joinPoint) throws Throwable {
long beginTime = System.currentTimeMillis();
MethodSignature signature = (MethodSignature) joinPoint.getSignature();
Method method = signature.getMethod();
SysLog annotation = method.getAnnotation(SysLog.class);
String value = annotation.value();
Object[] args = joinPoint.getArgs();
Object object = joinPoint.proceed(args);
try {
logService.log(beginTime, "around " + method.getName());
} catch (Exception e) {
}
return object;
}
@After("logPointCut()")
public void after(JoinPoint joinPoint) {
long beginTime = System.currentTimeMillis();
MethodSignature signature = (MethodSignature) joinPoint.getSignature();
Method method = signature.getMethod();
SysLog annotation = method.getAnnotation(SysLog.class);
String value = annotation.value();
Object[] args = joinPoint.getArgs();
try {
logService.log(beginTime, "after " + method.getName());
} catch (Exception e) {
}
}
@AfterReturning("logPointCut()")
public void afterReturning(JoinPoint joinPoint) {
long beginTime = System.currentTimeMillis();
MethodSignature signature = (MethodSignature) joinPoint.getSignature();
Method method = signature.getMethod();
SysLog annotation = method.getAnnotation(SysLog.class);
String value = annotation.value();
Object[] args = joinPoint.getArgs();
try {
logService.log(beginTime, "after returning " + method.getName());
} catch (Exception e) {
}
}
@AfterThrowing("logPointCut()")
public void afterThrowing(JoinPoint joinPoint) {
long beginTime = System.currentTimeMillis();
MethodSignature signature = (MethodSignature) joinPoint.getSignature();
Method method = signature.getMethod();
SysLog annotation = method.getAnnotation(SysLog.class);
String value = annotation.value();
Object[] args = joinPoint.getArgs();
try {
logService.log(beginTime, "after throwing " + method.getName());
} catch (Exception e) {
}
}
}
新建TestService类
package com.example.aop.service;
import com.example.aop.dto.TestDomain;
import com.example.aop.annotation.SysLog;
import org.springframework.stereotype.Service;
@Service
public class TestService {
@SysLog("log-1")
public void log1(String name, TestDomain testDomain) {
System.out.println("print log 1" + name + " " + testDomain.toString());
}
@SysLog("log-2")
public void log2(String name, TestDomain testDomain) {
System.out.println("print log 2" + name + " " + testDomain.toString());
}
@SysLog("throw-exception")
public void throwException() {
System.out.println("throw exception");
int i = 3/0;
}
}
新建TestController
package com.example.aop.controller;
import com.example.aop.dto.TestDomain;
import com.example.aop.service.TestService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class TestController {
@Autowired
private TestService testService;
@GetMapping("test")
public String test(@RequestParam("p1") String p1) {
TestDomain testDomain = new TestDomain();
testDomain.setId("1");
testDomain.setTitle("t1");
testService.log1(p1, testDomain);
testService.log2(p1, testDomain);
testService.throwException();
return "hello aop";
}
}
三、测试
运行AopApplication, 然后访问http://localhost:8080/test?p1=123,可以看到控制台有以下输出：
before log1 at: 1554903984403
print log 1123 com.example.aop.dto.TestDomain@2a7a4cd5
around log1 at: 1554903984402
after log1 at: 1554903984409
after returning log1 at: 1554903984409
before log2 at: 1554903984409
print log 2123 com.example.aop.dto.TestDomain@2a7a4cd5
around log2 at: 1554903984409
after log2 at: 1554903984410
after returning log2 at: 1554903984410
before throwException at: 1554903984410
throw exception
after throwException at: 1554903984410
after throwing throwException at: 1554903984410
github地址:https://github.com/lijun003/SpringBoot-AOP-log
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持创新互联。
