获取Content-type为application/json类型的传参不成功

sweetluo · 发表于 2017-3-19 18:18:45

//HTTP头部Content-type为application/json,而非大部分框架自动解析的application/x-www-form-urlencoded格式,需要自行读取后解析

public static JSONObject service(JSONObject params, ActionContext context) throws ServletException, IOException{
HttpServletRequest req = (HttpServletRequest)context.get(ActionContext.REQUEST);
HttpServletResponse resp = (HttpServletResponse)context.get(ActionContext.RESPONSE);
receivePost(req);
return null;
}

public static String receivePost(HttpServletRequest req) throws IOException, UnsupportedEncodingException {
      // 读取请求内容
      BufferedReader br = new BufferedReader(new InputStreamReader(req.getInputStream()));
      String line = null;
      StringBuilder sb = new StringBuilder();
      while((line = br.readLine())!=null){
         sb.append(line);
      }

      // 将资料解码返回
      String reqBody = sb.toString();
      System.out.println("resp:"+reqBody);
      return reqBody; //URLDecoder.decode(reqBody, HTTP.UTF_8);
}

获取不到参数，怎么处理？

liangyongfei · 发表于 2017-3-20 13:18:54

首先，请问你需要返回值吗？如果需要service 方法中不要 return null;
还有你receivePost 方法中return reqBody; 实际上没有任何作用！！并没有使用这个返回值！！

关于输入输出流的代码！建议上网搜一下吧！！想使用java实现什么能力？？
剩下的就是自己调试java代码，实现自己想要完成的事情
http://docs.wex5.com/debug-user-own-java-code/
http://docs.wex5.com/wex5-studio-question-list-2001/

调试过程中看一下哪儿不符合你的预期？？

sweetluo · 发表于 2017-3-20 14:09:45

需要返回值，下一步还要根据返回值处理，网上搜了一把，都不行，放在后面再慢慢折腾吧

liangyongfei · 发表于 2017-3-20 15:47:57

sweetluo 发表于 2017-3-20 14:09
需要返回值，下一步还要根据返回值处理，网上搜了一把，都不行，放在后面再慢慢折腾吧 ...

application/json类型表示传递参数类型为json对象！或者参数值应该写法是
params.getString("key")
只有上传文件的时候，才需要 req.getInputStream()
才需要ＩＯ流操作的吧！！ｊｓｏｎ格式的数据不需要通过IO输入获取吧！

sweetluo · 发表于 2017-3-20 16:54:50

application/x-www-form-urlencoded格式的可用下面的
String tradeStatus = req.getParameter("trade_status");

sweetluo · 发表于 2017-3-20 16:55:56

application/json类型　还是取不到

liangyongfei · 发表于 2017-3-20 17:03:13

sweetluo 发表于 2017-3-20 16:54
application/x-www-form-urlencoded格式的可用下面的
String tradeStatus = req.getParameter("trade_statu ...

baasServer 自定义action 传参和接受参数请参考：
http://docs.wex5.com/wex5-ui-question-list-2098/
写法不一样！不是直接在request 中获取的！

sweetluo · 发表于 2017-3-20 20:49:20

传入参数:
HTTP 请求类型 : POST
HTTP 数据格式 : JSON
HTTP Content-type : application/json

字段说明KeyTypeExample
signatureString32位小写
timestampLong1426817510111
channel_typeString‘WX’ or 'ALI’ or 'UN’ or 'KUAIQIAN’ or 'JD’ or 'BD’ or 'YEE’ or 'PAYPAL’ or 'BC’
sub_channel_typeString'WX_APP’ or 'WX_NATIVE’ or 'WX_JSAPI’ or 'WX_SCAN’ or 'ALI_APP’ or 'ALI_SCAN’ or 'ALI_WEB’ or 'ALI_QRCODE’ or 'ALI_OFFLINE_QRCODE’ or 'ALI_WAP’ or 'UN_APP’ or 'UN_WEB’ or 'PAYPAL_SANDBOX’ or 'PAYPAL_LIVE’ or 'JD_WAP’ or 'JD_WEB’ or 'YEE_WAP’ or 'YEE_WEB’ or 'YEE_NOBANKCARD’ or 'KUAIQIAN_WAP’ or 'KUAIQIAN_WEB’ or 'BD_APP’ or 'BD_WEB’ or 'BD_WAP’ or 'BC_TRANSFER’ or 'ALI_TRANSFER’
transaction_typeString'PAY’ or 'REFUND’ or 'TRANSFER'（TRANSFER只代表BC企业打款和支付宝打款；微信打款和红包，没有webhook）
transaction_idString'201506101035040000001’
transaction_feeInteger1 表示0.01元
trade_successBooltrue
message_detailMap(JSON){orderId:xxxx}

optional

Map(JSON)

{“agent_id”:“Alice”}

==========================================================
如何接收?
StringBuffer json = new StringBuffer();
      String line = null;


      try {
        req.setCharacterEncoding("utf-8");
         BufferedReader reader = ((ServletRequest) req).getReader();
        //BufferedReader reader = req.getReader();
         while ((line = reader.readLine()) != null) {
            json.append(line);
         }
      } catch (Exception e) {
         e.printStackTrace();
      }

java.lang.IllegalStateException: getInputStream() has already been called for this request

================================================
JSONArray userCode = (JSONArray) params.get(req);
      Object [] o =userCode.toArray();
      for(int i=0;i<o.length;i++){
         System.out.println("--test------"+o);
      }

三月 20, 2017 8:41:06 下午 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet WeX5_Baas_Servlet threw exception
java.lang.NullPointerException
at beecloud.Receiver.service(Receiver.java:52)
at beecloud.Beecloud__do.receiver(Beecloud__do.java:107)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.justep.baas.action.Engine.execAction(Unknown Source)
at com.justep.baas.action.Engine.execAction(Unknown Source)
at com.justep.baas.servlet.BaasServlet.execService(Unknown Source)
at com.justep.baas.servlet.BaasServlet.service(Unknown Source)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:745)

2017-03-20 20:41:06 Action[beecloud/beecloud/receiver]执行失败，null
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.justep.baas.action.Engine.execAction(Unknown Source)
at com.justep.baas.action.Engine.execAction(Unknown Source)
at com.justep.baas.servlet.BaasServlet.execService(Unknown Source)
at com.justep.baas.servlet.BaasServlet.service(Unknown Source)

=================================================
JSONArray userCode = (JSONArray) params.get("optional");
      Object [] o =userCode.toArray();
      for(int i=0;i<o.length;i++){
         System.out.println("--test------"+o);
      }

严重: Servlet.service() for servlet WeX5_Baas_Servlet threw exception
java.lang.ClassCastException: com.alibaba.fastjson.JSONObject cannot be cast to com.alibaba.fastjson.JSONArray
at beecloud.Receiver.service(Receiver.java:51)
at beecloud.Beecloud__do.receiver(Beecloud__do.java:107)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.justep.baas.action.Engine.execAction(Unknown Source)
at com.justep.baas.action.Engine.execAction(Unknown Source)
at com.justep.baas.servlet.BaasServlet.execService(Unknown Source)
at com.justep.baas.servlet.BaasServlet.service(Unknown Source)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:745)

2017-03-20 20:43:40 Action[beecloud/beecloud/receiver]执行失败，com.alibaba.fastjson.JSONObject cannot be cast to com.alibaba.fastjson.JSONArray
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.justep.baas.action.Engine.execAction(Unknown Source)

sweetluo · 发表于 2017-3-20 20:54:05

https://github.com/beecloud/beec ... ebhook_receiver.jsp

找到的说明，怎么将这个改成WEX5可用的？

liangyongfei · 发表于 2017-3-21 11:30:39

sweetluo 发表于 2017-3-20 20:54
https://github.com/beecloud/beecloud-java/blob/master/demo/WebRoot/webhook_receiver_example/webhook_ ...

案例中，获取参数的写法：(JSONArray) params.get("code");
code是前端传递过来的参数啊！！你写的是
(JSONArray) params.get(req);
请问哪儿见过这种写法？？？传递的参数是req 对象？？

真的不知道你想实现什么？？请把需求说明白一些！！！

如果是使用BaasServer 的请求以及baas.js的方法进行传参和接收参数的！就按照案例的书写格式实现！！

如果是使用ajax 实现的请求BaasServer ，并且需要通过获取HttpServletRequest 对象来获取值的！就按照通用的方法获取参数！
但是请不要混合使用！！

不要用baas.js的请求，和正常的HttpServletRequest 对象传参和接收参数！

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