Springboot中使用AOP特性非常简单，使用@AspectJ注解，然后再配置中开启AspectJ即可。在日常的应用，有时可以将日志记录和异常处理在一个拦截器中统一处理，但有时在项目中无法通过一个拦截器解决所有切面问题，此时，就需要将日志、异常处理等拦截器功能拆分开来，但有一点是相同的，就是在需要时增加一个抽象层次用于拦截。

基础知识

这部分的细节主要是注解的使用，可以参看之后示例。

参考资料

http://www.cnblogs.com/best/p/5736422.html

实践

AOP配置

@Configuration@EnableAspectJAutoProxypublic class AOPConfig {}

Log（AOP）实例

@Aspect@Componentpublic final class LogInterceptor {    private final static int DEFAULT_MAX_LOG_LENGTH = 8192;    @Pointcut("execution(*  com.bjork.ws.XXXWSImplForSpring.*(..))")    public void serviceMethodPointcut() {    }    @Pointcut("execution( * com.bjork.ws.agent..*.*(..)) && @annotation(com.bjork.ws.core.AgentOriginalMethod)")    public void agentOriginalMethodPointcut() {    }    @Around("serviceMethodPointcut() || agentOriginalMethodPointcut()")    // @Around("agentOriginalMethodPointcut()")    public Object Interceptor(ProceedingJoinPoint pjp) throws Throwable {        // 获取aop相关信息        Signature signature = pjp.getSignature();        MethodSignature methodSignature = (MethodSignature) signature;        Method targetMethod = methodSignature.getMethod();        Class
     returnType = targetMethod.getReturnType();        Object result = null;        Logger logger = LoggerFactory.getLogger(pjp.getTarget().getClass());        try {            // 设置默认返回值            result = returnType.newInstance();            logger.info(String.format("%s方法调用开始！", targetMethod.getName()));            // 约定只有一个参数            Object uniqueParameter = pjp.getArgs()[0];            logRequest(JsonHelper.serialize(uniqueParameter), logger);            result = pjp.proceed();            logResponse(JsonHelper.serialize(result), logger);        } finally {            logger.info(String.format("%s方法调用结束！", targetMethod.getName()));        }        return result;    }    protected void logRequest(String requestString, Logger logger) {        if (requestString.length() <= DEFAULT_MAX_LOG_LENGTH)            logger.info(String.format("请求体为：%s", requestString));    }    protected void logResponse(String responseString, Logger logger) {        if (responseString.length() <= DEFAULT_MAX_LOG_LENGTH)            logger.info(String.format("响应体为：%s", responseString));    }}

Exception （AOP）实例

@Aspect@Componentpublic final class ServiceInterceptor {    @Pointcut("execution(* com.bjork.ws.service..*(..)) "        + "&& @annotation(com.bjork.ws.core.ServiceOpenMethod)")    public void serviceMethodPointcut() {    }    @Around("serviceMethodPointcut()")    public GenericResult Interceptor(ProceedingJoinPoint pjp) {        // 获取aop相关信息        Signature signature = pjp.getSignature();        MethodSignature methodSignature = (MethodSignature) signature;        Method targetMethod = methodSignature.getMethod();        // Class
     returnType = targetMethod.getReturnType();        GenericResult result = new GenericResult();        Logger logger = LoggerFactory.getLogger(pjp.getTarget().getClass());        try {            // 设置默认返回值            // result = returnType.newInstance();            // 约定只有一个参数            Object uniqueParameter = pjp.getArgs()[0];            result = (GenericResult) pjp.proceed();        } catch (ValidException vex) {            result.getResultInfo().setIsSuccessful(false);            result.getResultInfo().setCode(vex.getErrorCode());            result.getResultInfo().setMessage(vex.getMessage());            logger.info(vex.getMessage());        } catch (BizException bex) {            result.getResultInfo().setIsSuccessful(false);            result.getResultInfo().setCode(bex.getErrorCode());            result.getResultInfo().setMessage(bex.getMessage());            logger.warn(bex.getMessage());        } catch (ExternalCallException ecex) {            result.getResultInfo().setIsSuccessful(false);            result.getResultInfo().setCode(ecex.getErrorCode());            result.getResultInfo().setMessage(ecex.getMessage());            logger.warn(ecex.getMessage());        } catch (Throwable ex) {            result.getResultInfo().setIsSuccessful(false);            result.getResultInfo().setCode(ExceptionInfo.SYSTEM_EXCEPTION_CODE);            result.getResultInfo().setMessage(ExceptionInfo.SYSTEM_EXCEPTION_MESSAGE);            logger.error(ex.getMessage(), ex);        } finally {        }        return result;    }}

AutoConfiguration配置

@SpringBootApplication(exclude = { DataSourceAutoConfiguration.class })//@SpringBootApplication@ComponentScan("com.xxx.ws")public class ServiceInitializer extends SpringBootServletInitializer {    @Override    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {        return application.sources(ServiceInitializer.class);    }    @Bean    public LogAspect logAspect() {        return new LogAspect();    }    @Bean    public ServiceExceptionAspect serviceExceptionAspect() {        return new ServiceExceptionAspect();    }}