ucenter在Java中实现单点登录问题，求分析。

Question

用的是DZ3.2,要实现Java接口单点登录，先已在ucenter后台管理中填写了新应用，并且通信成功，（所有的代码都是从discuz-ucenter-api-for-java中获取的源码），但当我测试时出现了一下问题：
//Discuz论坛的登录
Client uc = new Client();
String $result = uc.uc_user_login(user.getUsername(), user.getPassword());
String $ucsynlogin = "";
LinkedList rs = XMLHelper.uc_unserialize($result);
if(rs.size()>0){
int $uid = Integer.parseInt(rs.get(0));
String $username = rs.get(1);
String $password = rs.get(2);
String $email = rs.get(3);
if($uid > 0) {
$ucsynlogin = uc.uc_user_synlogin($uid);
} else if($uid == -1) {
System.out.println("用户不存在,或者被删除");
} else if($uid == -2) {
System.out.println("密码错");
} else {
System.out.println("未定义");
}
}
此时result的返回值为function $(id) { return document.getElementById(id);}，这是我第一个疑惑，为什么会返回这个，还有数组rs为空；追踪到 XMLHelper.uc_unserialize 方法，后台还报了个错误，如下所示：
PS：对于源码是完全copy自discuz-ucenter-api-for-java ，其他人都可以运行成功，我的问题出在哪？各位大神帮分析分析。
[Fatal Error] :1:145: XML 文档结构必须从头至尾包含在同一个实体内。
org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 145; XML 文档结构必须从头至尾包含在同一个实体内。
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:257)
at org.nercita.api.ucenter.XMLHelper.uc_unserialize(XMLHelper.java:37)
at org.nercita.manger.supervision.controllers.HomeController.loginin(HomeController.java:468)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:777)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:706)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.orm.hibernate4.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:150)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
Login failed
登录的结果:<?xml version="1.0" encoding="gbk"?><![CDATA[function $(id) { return document.getElementById(id);}

Answer 1

http://www.discuz.net/thread-3553733-1-1.html