Als ich Struts2 verwendet, um eine Datei hochzuladen, klickte ich in jsp submit, aber Tomcat zeigte mir die falsche Nachricht, ich habe im Internet gesucht, aber ich kann die Antwort nicht finden, also hoffe ich, dass mir jemand helfen kann, danke!Hochladen einer Datei mit Struts2 (der Webserver, den ich benutze ist Tomcat 7)
die falsche Botschaft ist unter:
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error() that prevented it from fulfilling this request.
exception
java.lang.NullPointerException
java.io.FileInputStream.<init>(FileInputStream.java:134)
lanxiaoxing.upload.upLoadAction.execute(upLoadAction.java:58)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:601)
com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:441)
com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:280)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:243)
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:165)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:252)
org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:179)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:306)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:130)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:165)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:179)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488)
org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
Anmerkung Der vollständige Stack-Trace von der Ursache ist in den Apache Tomcat/7.0.26 Protokolle zur Verfügung. Apache Tomcat/7.0.26
die struts.xml ist:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"
"http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<package name="lanxiaoxing.user" extends="struts-default">
<action name="loginUser" class="lanxiaoxing.user.userAction">
<result name="success">success.jsp</result>
<result name="error">error.jsp</result>
</action>
</package>
<package name="lanxiaoxing.upload" extends="struts-default">
<action name="upLoad" class="lanxiaoxing.upload.upLoadAction">
<result name="SUCCESS">upload_success.jsp</result>
</action>
</package>
</struts>
die upLoadAction.java ist:
package lanxiaoxing.upload;
import java.io.*;
import javax.servlet.http.*;
import org.apache.struts2.*;
import com.opensymphony.xwork2.*;
public class upLoadAction extends ActionSupport{
/**
*
*/
private static final long serialVersionUID = 1L;
private File lanxiaoxingfile;
private String lanxiaoxingfileContentType;
private String lanxiaoxingfileName;
private String savePath;
private String getSavePath(){
HttpServletRequest request = ServletActionContext.getRequest();
return request.getSession().getServletContext().getRealPath(savePath);
}
public File getlanxiaoxingfile(){
return lanxiaoxingfile;
}
public void setlanxiaoxingfile(File lanxiaoxingfile){
this.lanxiaoxingfile=lanxiaoxingfile;
}
public String getlanxiaoxingfileContentType(){
return lanxiaoxingfileContentType;
}
public void setlanxiaoxingfileContenType(String lanxiaoxingfileContentType){
this.lanxiaoxingfileContentType=lanxiaoxingfileContentType;
}
public String getlanxiaoxingfileName(){
return lanxiaoxingfileName;
}
public void setlanxiaoxingfileName(String lanxiaoxingfileName){
this.lanxiaoxingfileName=lanxiaoxingfileName;
}
public void setsavePath(String savePath){
this.savePath=savePath;
}
public String execute() throws Exception{
setsavePath("");
FileOutputStream fos = new FileOutputStream(getSavePath()+"\\"+getlanxiaoxingfileName());
FileInputStream fis = new FileInputStream(getlanxiaoxingfile());
byte[]buffer = new byte[1024];
int len=0;
while((len=fis.read(buffer))>0){
fos.write(buffer, 0, len);
}
return SUCCESS;
}
}
Sieht so aus, als könnte die Datei nicht gefunden werden. Kann ich Ihr Aktions-Mapping auf struts.xml und JAVA sehen? – batbaatar
möchte diesen Teil sehen 'lanxiaoxing.upload.upLoadAction.execute (upLoadAction.java:58)' –