目錄
一立莉、攔截器對(duì)于參數(shù)的驗(yàn)證問題
二、嘗試方案之使用攔截器
三、使用spring的注解 @ControllerAdvice

一:攔截器對(duì)于參數(shù)的驗(yàn)證問題

問題場(chǎng)景：
由于之前的參數(shù)驗(yàn)證都是放在參數(shù)體里面,沒有放到方法參數(shù)上或者頭部，請(qǐng)求數(shù)據(jù)參數(shù)格式為json所以對(duì)于所有的接口欠气，我需要驗(yàn)證這公共部分的正確與否，所以我現(xiàn)在需要對(duì)請(qǐng)求到controller之前進(jìn)行攔截镜撩，并進(jìn)行這部分公共參數(shù)的驗(yàn)證,所以本身最先想到了兩種方案時(shí)使用過濾器预柒，要么使用攔截器，但是做的過程中得到第三種方案琐鲁。具體見下

二卫旱、嘗試方案之使用攔截器

2.1先上代碼如下：

public class AuthInterceptor extends HandlerInterceptorAdapter {
private static final Logger log = Logger.getLogger(AuthInterceptor.class);
//本來時(shí)打算在這里面獲取到參數(shù)，然后對(duì)公共部分進(jìn)行驗(yàn)證    
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
        throws Exception {
        String token = request.getParameter("appId");;
        if(StringUtils.isblack(token)){
               //使用流寫出對(duì)象围段，提示token不能為空;
               ResultBean result = new ResultBean("10001","token不能為空")
               ...
              return false;
          }
        //注釋一
        /*
        StringBuffer sb = new StringBuffer();
        InputStreamReader isr = new InputStreamReader(request.getInputStream());
        BufferedReader br = new BufferedReader(isr);  
         String s = "";   
         while ((s = br.readLine()) != null) {  
             sb.append(s);  
         }  
         System.out.println(sb.toString());
        */

        //注釋二
        /*  
        if(handler instanceof HandlerMethod){
            HandlerMethod handlerMethod = (HandlerMethod)handler;
            MethodParameter[] methodParameters = handlerMethod.getMethodParameters();
            for(MethodParameter methodParameter : methodParameters){
            System.out.println(methodParameter.getParameterName());
            }
        }
        }
       */  

xml中配置如下：
<mvc:interceptors>
    <mvc:interceptor>
        <mvc:mapping path="/*.cgi"/>
        <mvc:mapping path="/test/*.cgi"/>
        <bean class="com.mouse.moon.common.auth.AuthInterceptor"></bean>
    </mvc:interceptor>
</mvc:interceptors>

上述代碼部分顾翼，可以看出，我在preHandle(...) 方法中想獲取參數(shù)奈泪，然后
在這里面做統(tǒng)一的驗(yàn)證适贸，成功則繼續(xù)望下走,失敗則直接以流的形式寫出
錯(cuò)誤對(duì)象。在前面的問題中已經(jīng)說明涝桅，參數(shù)是以json的格式傳入到后臺(tái)拜姿，
并且功能部分都是放在json的數(shù)據(jù)中，所以這里request獲取到的數(shù)據(jù)為
空數(shù)據(jù)冯遂。
2.2 :看到注釋一中的代碼,我在這里使用流的形式來讀取到請(qǐng)求數(shù)據(jù),然后此時(shí)我獲取到相關(guān)的參數(shù)蕊肥，可是當(dāng)我繼續(xù)往下走時(shí),請(qǐng)求到達(dá)controller卻報(bào)錯(cuò)，錯(cuò)誤的意思大致就是說流沒了,因?yàn)槲覀冊(cè)跀r截器里面讀取了流，所以在controller中沒辦法再次讀取流了壁却，使得其直接拋出異常批狱。異常如下：

org.springframework.http.converter.HttpMessageNotReadableException: Required request body is missing: public com.mouse.moon.common.bean.ResultBean com.mouse.person.controller.PersonController.getPersonInfo(com.mouse.moon.common.bean.ParameBean) throws com.mouse.moon.common.exception.ExceptionAbstract
    at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.readWithMessageConverters(RequestResponseBodyMethodProcessor.java:151)
    at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:125)
    at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:78)
    at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:162)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:129)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:814)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:737)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1074)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2466)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2455)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

主要是“Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: Required request body is missing:”
所以我就在想，那么此時(shí)我們既然讀到了流展东，然后再把流寫出不就可以了赔硫，可是我查閱了下資料，發(fā)現(xiàn)攔截器沒辦法進(jìn)行這操作盐肃，倒是過濾器時(shí)可以獲取到流后再寫回去爪膊。
然后我又試驗(yàn)了網(wǎng)上說的使用注釋二的代碼進(jìn)行參數(shù)獲取，結(jié)果獲取的參數(shù)都是空的砸王。
所以至此推盛，使用攔截器來做參數(shù)驗(yàn)證這一步基本上宣告失敗了，必須得另外處理方式处硬，所以打算使用過濾器小槐，但是再解決的過錯(cuò)中跟朋友交流了下，說到有這么一個(gè)注解 @ControllerAdvice結(jié)合HttpEntity<String> 來使用荷辕，我就轉(zhuǎn)門去看了下，得到了我最后的解決方案件豌，當(dāng)然疮方，過濾器的查到的資料可以試試
https://my.oschina.net/vernon/blog/363693?fromerr=2jheR52d

三、使用spring的注解 @ControllerAdvice

3.1: @ControllerAdvice說明
該注解時(shí)再spring3.2之后增加的茧彤，見名大概意思是控制器增強(qiáng)骡显。
@ControllerAdvice注解內(nèi)部使用@ExceptionHandler、@InitBinder曾掂、@ModelAttribute注解的方法應(yīng)用到所有的 @RequestMapping注解的方法惫谤。
3.2:描述
我這里使用了結(jié)合的方式使用,@ModelAttribute結(jié)合@ExceptionHandler進(jìn)行結(jié)合使用，現(xiàn)在@ModelAttribute中進(jìn)行參數(shù)獲取珠洗，然后轉(zhuǎn)換為相應(yīng)的對(duì)象,獲取后對(duì)參數(shù)進(jìn)行驗(yàn)證溜歪，但是驗(yàn)證失敗后我們要怎么處理了，這里面沒辦法返回錯(cuò)誤碼呀许蓖，所以如果驗(yàn)證失敗就拋出異常蝴猪，然后再@ExceptionHandler中進(jìn)行統(tǒng)一處理。驗(yàn)證通過就吧獲取的參數(shù)返回即可膊爪，那么此時(shí)在controller中獲取參數(shù)需要使用@ModelAttribute進(jìn)行獲取自阱。代碼如下：

@ControllerAdvice
public class ValidateControllerAdvice {

    private static final Logger log = Logger.getLogger(ValidateControllerAdvice.class);

    @ModelAttribute
    public ParameBean getBobyInfo(HttpEntity<String> httpEntity,HttpServletRequest request,HttpServletResponse response) throws JsonParseException, JsonMappingException, IOException, CommonValidateException {    
    //獲取參數(shù)
        String data = httpEntity.getBody();
        ObjectMapper objectMapper =  new ObjectMapper();
        ParamBean paramBean = data != null ? objectMapper.readValue(data, ParamBean.class) : null;
        if (pb != null)
        {
            String secretId = paramBean.getSecretId();
            String token = paramBean.getToken();
            if(StringUtils.isBlank(secretId)){
                throw new ValidateException( Enums.ERROR_SECRETID_NOTNULL,
                        "SECRETID不能為空");
            }else if(StringUtils.isBlank(token)){
                throw new ValidateException( Enums.ERROR_TOKEN_NOT_NULL,
                        "token不能為空");
            }else if(validate(token)){
                        throw new ValidateException( Enums.ERROR_TOKEN_INVALID,
                        "無效的token");  
              }
        }
        return paramBean;    
    }
    
     //捕獲ValidateException的異常，統(tǒng)一返回
    @ExceptionHandler({ValidateException.class})
    @ResponseBody
    public ResultBean validateException(ValidateException ex){
        ResultBean result = new ResultBean();
        result.setResultCode(ex.getResultCode());
        result.setResultMsg(ex.getResultMsg());
        return result;
    }
}

四:隱患

幾天后米酬，測(cè)試發(fā)現(xiàn)了一個(gè)問題沛豌，就是比如我的返回?cái)?shù)據(jù)，我想轉(zhuǎn)換時(shí)間不反回長整形赃额，而是"yyyy-MM-dd HH:mm:ss"的形式加派，所以我使用jackson的配置方案如下

  
      
      <mvc:annotation-driven>
        <mvc:message-converters>
            <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
                <property name="objectMapper">
                    <bean class="com.fasterxml.jackson.databind.ObjectMapper">
                        <property name="serializationInclusion" value="NON_NULL"/>
                          <property name="dateFormat">  
                            <bean class="java.text.SimpleDateFormat">  
                                <constructor-arg type="java.lang.String" value="yyyy-MM-dd HH:mm:ss" />  
                            </bean>  
                        </property>  
                    </bean>
                </property>
                <property name="supportedMediaTypes">
                    <list>
                        <value>application/json;charset=UTF-8</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
     </mvc:annotation-driven> 

測(cè)試得到的結(jié)果是

org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Can not deserialize instance of java.lang.String out of START_OBJECT token
 at [Source: java.io.PushbackInputStream@3a4f5e0b; line: 1, column: 1]; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.lang.String out of START_OBJECT token
 at [Source: java.io.PushbackInputStream@3a4f5e0b; line: 1, column: 1]
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:224)
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.read(AbstractJackson2HttpMessageConverter.java:208)
    at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:197)
    at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:141)
    at org.springframework.web.servlet.mvc.method.annotation.HttpEntityMethodProcessor.resolveArgument(HttpEntityMethodProcessor.java:123)
    at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:78)
    at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:162)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:129)
    at org.springframework.web.method.annotation.ModelFactory.invokeModelAttributeMethods(ModelFactory.java:136)
    at org.springframework.web.method.annotation.ModelFactory.initModel(ModelFactory.java:109)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:792)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:737)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1074)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2466)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2455)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)
Caused by: com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.lang.String out of START_OBJECT token
 at [Source: java.io.PushbackInputStream@3a4f5e0b; line: 1, column: 1]
    at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:148)
    at com.fasterxml.jackson.databind.DeserializationContext.mappingException(DeserializationContext.java:762)
    at com.fasterxml.jackson.databind.deser.std.StringDeserializer.deserialize(StringDeserializer.java:59)
    at com.fasterxml.jackson.databind.deser.std.StringDeserializer.deserialize(StringDeserializer.java:12)
    at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3066)
    at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2221)
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:221)
    ... 44 more
2016-12-10 16:47:28 [ http-apr-8080-exec-6:20921 ] - [ DEBUG ] Resolving exception from handler [public com.mouse.common.bean.ResultBean com.mouse.person.controller.PersonController.getPersonInfo(com.mouse.common.bean.ParameBean)]: org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Can not deserialize instance of java.lang.String out of START_OBJECT token
 at [Source: java.io.PushbackInputStream@3a4f5e0b; line: 1, column: 1]; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.lang.String out of START_OBJECT token
 at [Source: java.io.PushbackInputStream@3a4f5e0b; line: 1, column: 1]
2016-12-10 16:47:28 [ http-apr-8080-exec-6:20921 ] - [ DEBUG ] Resolving exception from handler [public com.mouse.common.bean.ResultBean com.mouse.person.controller.PersonController.getPersonInfo(com.mouse.common.bean.ParameBean) throws com.mouse.common.exception.ExceptionAbstract]: org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Can not deserialize instance of java.lang.String out of START_OBJECT token
 at [Source: java.io.PushbackInputStream@3a4f5e0b; line: 1, column: 1]; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.lang.String out of START_OBJECT token
 at [Source: java.io.PushbackInputStream@3a4f5e0b; line: 1, column: 1]
2016-12-10 16:47:28 [ http-apr-8080-exec-6:20921 ] - [ DEBUG ] Resolving exception from handler [public com.mouse.common.bean.ResultBean com.mouse.person.controller.PersonController.getPersonInfp(com.mouse.common.bean.ParamBean)]: org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Can not deserialize instance of java.lang.String out of START_OBJECT token
 at [Source: java.io.PushbackInputStream@3a4f5e0b; line: 1, column: 1]; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.lang.String out of START_OBJECT token
 at [Source: java.io.PushbackInputStream@3a4f5e0b; line: 1, column: 1]
2016-12-10 16:47:28 [ http-apr-8080-exec-6:20921 ] - [ WARN ] Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Can not deserialize instance of java.lang.String out of START_OBJECT token
 at [Source: java.io.PushbackInputStream@3a4f5e0b; line: 1, column: 1]; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.lang.String out of START_OBJECT token
 at [Source: java.io.PushbackInputStream@3a4f5e0b; line: 1, column: 1]
2016-12-10 16:47:28 [ http-apr-8080-exec-6:20921 ] - [ DEBUG ] Null ModelAndView returned to DispatcherServlet with name 'SpringMVC': assuming HandlerAdapter completed request handling
2016-12-10 16:47:28 [ http-apr-8080-exec-6:20922 ] - [ DEBUG ] Successfully completed request

想把所有的時(shí)間都轉(zhuǎn)換了叫确，但是發(fā)現(xiàn)這個(gè)在我接收參數(shù)的時(shí)候都有異常。今天在某位大神的指導(dǎo)下發(fā)現(xiàn)了問題所在哼丈，我們?cè)诩恿宿D(zhuǎn)換器后启妹，在發(fā)送請(qǐng)求的時(shí)候會(huì)講json數(shù)據(jù)使用MappingJackson2HttpMessageConverter此類進(jìn)行轉(zhuǎn)換，那么到了HttpEntity時(shí)已經(jīng)是對(duì)象了但是我們卻還是使用HttpEntity<String>接收
所以一直抱上面的錯(cuò)誤醉旦，轉(zhuǎn)換異常饶米。所以我們可以嘗試如下

ObjectMapper objectMapper = new ObjectMapper();
String json="{\n"+"\t\"appId":"\"123567\",\n"+"\t\"appcode":"\"sdasfa\"+"}";
objectMapper.readValue(json,String.class);

此時(shí)就會(huì)報(bào)錯(cuò)如上。所以接收點(diǎn)需要修改為HttpEntity<ParamEngine>的寫法车胡，接收處就不需要在轉(zhuǎn)換類型檬输，getBody()后就是ParamEngine對(duì)象。

五：浩學(xué)習(xí)

                                 __                                                        
                   __  _  ____ __|  |__ _____    ___
                   \ \/ \/ /  |  \  |  \\__  \  /  _ \   
                    \     /|  |  /   Y  \/ __ \(  <_> )
                     \/\_/ |____/|___|  (____  /\____/ 
                                      \/     \/          
走在自己的路上匈棘，遇到要遇到的人丧慈，經(jīng)歷要經(jīng)歷的事，這才是我們需要面對(duì)的主卫。努力逃默，come on!!!
                                                        公元2016年12月7號(hào)凌晨00點(diǎn)35分