我试图从运行Struts2,Hibernate和
Spring的Web服务器下载文件,但我总是得到这个例外.
java.lang.IllegalArgumentException: Can not find a java.io.InputStream with the name [inputName] in the invocation stack. Check the <param name="inputName"> tag specified for this action.
org.apache.struts2.dispatcher.StreamResult.doExecute(StreamResult.java:237)
org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:186)
com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:371)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:275)
org.apache.struts2.interceptor.DeprecationInterceptor.intercept(DeprecationInterceptor.java:41)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:167)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265)
org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:249)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:249)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:252)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:139)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:189)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
com.riteshsangwan.ossoc.core.interceptors.AuthenticationInterceptor.intercept(AuthenticationInterceptor.java:34)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)
org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:562)
org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
我检查了inputName参数并调试了项目以找出InputStream不为null.
这是下载类
inputName= new ByteArrayInputStream(mf.getFileContent());
这是struts 2映射
<action name="downloadfile" class="com.riteshsangwan.ossoc.core.actions.DownloadFile">
<result name="success" type="stream">
<param name="inputName">inputName</param>
<param name="contentDisposition">attachment;filename=${fileName}</param>
<param name="contentType">${contentType}</param>
<param name="bufferSize">1024</param>
<param name="contentLength">${contentLength}</param>
<param name="allowCaching">false</param>
</result>
<result name="input">/user/files.jsp</result>
</action>
是因为ByteArrayInputStream或任何其他原因导致的异常.我有所有变量的公共getter和setter方法,我检查过它们都不是null.
编辑：DownloadFile类
package com.riteshsangwan.ossoc.core.actions;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.riteshsangwan.ossoc.core.dao.FilesBo;
import com.riteshsangwan.ossoc.core.entities.Files;
import com.riteshsangwan.ossoc.core.entities.Users;
import com.riteshsangwan.ossoc.core.util.MyFile;
import com.riteshsangwan.ossoc.core.util.Operations;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletContext;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.context.ServletContextAware;
public class DownloadFile extends ActionSupport implements ServletContextAware{
private long fid;
private String contentType;
private long contentLength;
private String fileName;
private InputStream inputName;
private ServletContext context;
private String downloadStatus;
private String downloadpassword;
private List fileList;
private Map<String,Object> session;
public String getFileName() {
return fileName;
}
public void setFileName(String fileName) {
this.fileName = fileName;
}
public List getFileList() {
return fileList;
}
public void setFileList(List fileList) {
this.fileList = fileList;
}
public String getDownloadStatus() {
return downloadStatus;
}
public void setDownloadStatus(String downloadStatus) {
this.downloadStatus = downloadStatus;
}
public String getDownloadpassword() {
return downloadpassword;
}
public void setDownloadpassword(String downloadpassword) {
this.downloadpassword = downloadpassword;
}
public String getStatus() {
return downloadStatus;
}
public void setStatus(String downloadStatus) {
this.downloadStatus = downloadStatus;
}
@Autowired
private FilesBo fbo;
@Autowired
private Operations operation;
public Operations getOperation() {
return operation;
}
public void setOperation(Operations operation) {
this.operation = operation;
}
public FilesBo getFbo() {
return fbo;
}
public void setFbo(FilesBo fbo) {
this.fbo = fbo;
}
public long getFid() {
return fid;
}
public void setFid(long fid) {
this.fid = fid;
}
public String getContentType() {
return contentType;
}
public void setContentType(String contentType) {
this.contentType = contentType;
}
public long getContentLength() {
return contentLength;
}
public void setContentLength(long contentLength) {
this.contentLength = contentLength;
}
public InputStream getInputName() {
return inputName;
}
public void setInputName(InputStream inputName) {
this.inputName = inputName;
}
@Override
public String execute(){
String response;
int a=10;
try
{
session=ActionContext.getContext().getSession();
Users u= (Users) session.get("user");
long uid=u.getUid();
fileList=fbo.getAllFiles(uid);
Files f=getFbo().getFileWithData(getFid());
MyFile mf=new MyFile();
mf.setFileContent(f.getFileData());
mf.setFileContentType(f.getFileContentType());
mf.setFileHash(f.getFileHash());
mf.setFileName(f.getFileName());
mf.setFileSize(f.getFileSize());
mf.setPassword(downloadpassword);
mf=operation.decrypt(mf);
fileName=mf.getFileName();
contentLength=mf.getFileSize();
contentType=mf.getFileContentType();
inputName=new ByteArrayInputStream(mf.getFileContent());
response=ActionSupport.SUCCESS;
}
catch(IOException e)
{
if(e.getMessage().equalsIgnoreCase("Message has been altered or password incorrect"))
{
downloadStatus="Message has been altered or incorrect password. Try again.";
}
response=ActionSupport.INPUT;
}
catch(Exception e)
{
downloadStatus="Some error occured. Try Again";
response=ActionSupport.INPUT;
}
return response;
}
@Override
public void setServletContext(ServletContext servletContext) {
this.context=servletContext;
}
}
最佳答案 好的,将inputName更改为inputStream.像这样
private InputStream inputStream;
public InputStream getInputStream() {
return inputStream;
}
public void setInputStream(InputStream inputStream) {
this.inputStream= inputStream;
}
参数inputName的默认设置是inputStream,因此,您可以删除它.另请注意,结果中的参数名称在值堆栈中查找.因此,如果在操作中公开getInputName之类的getter,则意味着要覆盖配置中的值.
