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我在 JAVA 类中调用 .net webservice，它将从文本文件中读取字符串，然后 UTF8 对其进行编码并将该字符串返回给 JAVA。有时会出现正确的输出。但有时这会给出非法参数异常，即使文本文件中的文本格式正确。以下是我得到的例外：

**SEVERE: Servlet.service() for servlet BaseController threw exception
java.lang.IllegalArgumentException: The char '0x0' after 'return code:  502
<HEAD><TITLE>Parent proxy is not responding</TITLE></HEAD>
<BODY BGCOLOR="white" FGCOLOR="black"><H1>Parent proxy is not responding</H1><HR>
<FONT FACE="Helvetica,Arial"><B>
Description: Parent proxy is not responding</B></FONT>
<HR>
<!-- default "Parent proxy is not responding" response (502) -->
</BODY>
' is not a valid XML character.
    at org.apache.axis.components.encoding.AbstractXMLEncoder.encode(AbstractXMLEncoder.java:110)
    at org.apache.axis.utils.XMLUtils.xmlEncodeString(XMLUtils.java:131)
    at org.apache.axis.utils.DOM2Writer.normalize(DOM2Writer.java:344)
    at org.apache.axis.utils.DOM2Writer.print(DOM2Writer.java:246)
    at org.apache.axis.utils.DOM2Writer.print(DOM2Writer.java:208)
    at org.apache.axis.utils.DOM2Writer.serializeAsXML(DOM2Writer.java:77)
    at org.apache.axis.utils.DOM2Writer.serializeAsXML(DOM2Writer.java:60)
    at org.apache.axis.utils.DOM2Writer.nodeToString(DOM2Writer.java:49)
    at org.apache.axis.utils.XMLUtils.privateElementToString(XMLUtils.java:433)
    at org.apache.axis.utils.XMLUtils.ElementToString(XMLUtils.java:442)
    at org.apache.axis.utils.XMLUtils.getInnerXMLString(XMLUtils.java:542)
    at org.apache.axis.AxisFault.dumpToString(AxisFault.java:388)
    at org.apache.axis.AxisFault.printStackTrace(AxisFault.java:789)
    at java.lang.Throwable.printStackTrace(Throwable.java:451)
    at com.hcl.webservice.BaseController.doPost(BaseController.java:155)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    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:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    at java.lang.Thread.run(Thread.java:680)
**

请帮助解决这个问题。提前致谢

4

1 回答 1

0

该消息表明完整的以下字符串之后的 NULL 字符 (0x0)：

return code:  502
<HEAD><TITLE>Parent proxy is not responding</TITLE></HEAD>
<BODY BGCOLOR="white" FGCOLOR="black"><H1>Parent proxy is not responding</H1><HR>
<FONT FACE="Helvetica,Arial"><B>
Description: Parent proxy is not responding</B></FONT>
<HR>
<!-- default "Parent proxy is not responding" response (502) -->
</BODY>

不是有效的 XML 字符。换句话说，您遇到了涉及父代理的网络问题，并且 HTTP 响应的正文包含 HTML 格式的人类可读的问题描述。您的服务客户端正在尝试将此文本解析为 XML，因此您的错误。

于 2013-07-25T15:06:29.510 回答