springboot使用aop攔截controller幹一些事導致controller裡的service們@Autowired全部注入失敗，報空指標

先整合使用aop吧

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-aop</artifactId>
</dependency>

properties加點玩意

#aop
spring.aop.proxy-target-class
 
=true
spring.aop.auto=true

proxy-target-class屬性值決定是基於介面的還是基於類的代理被建立。如果proxy-target-class 屬性值被設定為true，那麼基於類的代理將起作用（這時需要cglib庫）。如果proxy-target-class屬值被設定為false或者這個屬性被省略，那麼標準的JDK 基於介面的代理將起作用。
**

然後直接貼一個模型程式碼吧

**

package cc.datebook.aop;

import cc.datebook.utils.IpUtil;
import com.google.gson.Gson
 
;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context
 
.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.servlet.HandlerMapping;

import javax.servlet.http.HttpServletRequest;
import java.util.Map;

/**
 * Created by wangH on 2017/12/12.
 */
@Aspect
@Configuration
public class ControllerMonitorAop {

    private static final Logger logger = LoggerFactory.getLogger(ControllerMonitorAop.class);
    ThreadLocal<Long> startTime = new ThreadLocal<>();

    @Pointcut("execution(public * cc.datebook.web.*Controller.*(..))")
    public void excudeService() {}

    @Around("excudeService()")
    public Object doAround(ProceedingJoinPoint pjp) throws Throwable {
        RequestAttributes ra = RequestContextHolder.getRequestAttributes();
        ServletRequestAttributes sra = (ServletRequestAttributes) ra;
        HttpServletRequest request = sra.getRequest();

        String ipAddr = IpUtil.getIpAddr(request);
        String url = request.getRequestURL().toString();
        String method = request.getMethod();
        String uri = request.getRequestURI();
        String queryString = request.getQueryString();
        String params = "";
        if ("POST".equals(method)) {
            Object[] paramsArray = pjp.getArgs();
            params = argsArrayToString(paramsArray);
        } else {
            Map<?, ?> paramsMap = (Map<?, ?>) request.getAttribute(HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE);
            params = paramsMap.toString();
        }
        logger.info("request begin=>ipAddr: {}, url: {}, method: {}, uri: {}, params: {}", ipAddr, url, method, uri, params);

        // result的值就是被攔截方法的返回值
        Object result = pjp.proceed();
        Gson gson = new Gson();
        String ab = gson.toJson(result).toString();
        if (ab.length() > 200){
            ab = ab.substring(0,200);
        }
        logger.info("request end=>" + ab);
        return result;
    }

    /**
     * 請求引數拼裝
     * @param paramsArray
     * @return
     */
    private String argsArrayToString(Object[] paramsArray) {
        String params = "";
        if (paramsArray != null && paramsArray.length > 0) {
            for (int i = 0; i < paramsArray.length; i++) {
                Gson gson = new Gson();
                Object jsonObj = gson.toJson(paramsArray[i]);
                params += jsonObj.toString() + " ";
            }
        }
        return params.trim();
    }
}

但是攔截所有controller之後發現 service都注入失敗，一番折騰無疾而終。最後研究發現，這個aop只能適用於 protect 和public …
之後把controller中的所有方法都改成public就正常…

一個小坑吧