xutils android上传图片，服务器怎么接收处理?报错

请教一下：

xutils在上传图片的时候，java服务器怎么做接收操作啊，用jfinal getfile时报错

java.lang.RuntimeException: java.io.IOException: Corrupt form data: premature ending
at com.jfinal.upload.MultipartRequest.wrapMultipartRequest(MultipartRequest.java:121)
at com.jfinal.upload.MultipartRequest.<init>(MultipartRequest.java:59)
at com.jfinal.core.Controller.getFiles(Controller.java:600)
at com.jfinal.core.Controller.getFile(Controller.java:607)
at com.langya.controller.H_Users_Controller.addPics(H_Users_Controller.java:119)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.jfinal.core.ActionInvocation.invoke(ActionInvocation.java:55)
at com.jfinal.core.ActionHandler.handle(ActionHandler.java:73)
at com.jfinal.core.JFinalFilter.doFilter(JFinalFilter.java:72)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
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)

谢谢