Question

我得到以下错误：java.lang.IllegalStateException：在使用Struts2实现JSON时，已经为此请求调用了getInputStream（）。例外：

org.apache.struts2.json.JSONException: org.apache.struts2.json.JSONException: 
    java.lang.reflect.InvocationTargetException
        org.apache.struts2.json.JSONWriter.bean(JSONWriter.java:230)
        org.apache.struts2.json.JSONWriter.process(JSONWriter.java:160)
        org.apache.struts2.json.JSONWriter.value(JSONWriter.java:126)
        org.apache.struts2.json.JSONWriter.write(JSONWriter.java:94)
        org.apache.struts2.json.JSONUtil.serialize(JSONUtil.java:115)
        org.apache.struts2.json.JSONResult.createJSONString(JSONResult.java:197)
        org.apache.struts2.json.JSONResult.execute(JSONResult.java:170)
        com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:374)
    ...........

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


org.apache.catalina.connector.Request.getReader(Request.java:1242)
    org.apache.catalina.connector.RequestFacade.getReader(RequestFacade.java:506)
    javax.servlet.ServletRequestWrapper.getReader(ServletRequestWrapper.java:212)
    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    java.lang.reflect.Method.invoke(Unknown Source)
    org.apache.struts2.json.JSONWriter.bean(JSONWriter.java:210)
    org.apache.struts2.json.JSONWriter.process(JSONWriter.java:160)
    org.apache.struts2.json.JSONWriter.value(JSONWriter.java:126)
    org.apache.struts2.json.JSONWriter.add(JSONWriter.java:355)
    org.apache.struts2.json.JSONWriter.bean(JSONWriter.java:215)
    org.apache.struts2.json.JSONWriter.process(JSONWriter.java:160)
    org.apache.struts2.json.JSONWriter.value(JSONWriter.java:126)
    org.apache.struts2.json.JSONWriter.write(JSONWriter.java:94)
    org.apache.struts2.json.JSONUtil.serialize(JSONUtil.java:115)
    org.apache.struts2.json.JSONResult.createJSONString(JSONResult.java:197)
    org.apache.struts2.json.JSONResult.execute(JSONResult.java:170)

.........

请帮我解决这个错误，因为我遇到了这个问题我有几个问题：我已经实现了ServletRequestAware并使用它来获取userLocale。它是否与JSONWriter对象冲突。

Answer 1

我假设您使用的是Struts的2.x版本，我遇到了同样的问题并发现了Struts的一个现有错误 - explained here

实际上，RequestAware或SessionAware的任何操作都会自动绑定会话和请求。我从行动中移除了我的请求获取，事情开始正常。

java.lang.IllegalStateException：已经为此请求调用了getInputStream（）+ Struts2和JSON

1 个答案: