Struts2中文件下载出现java.lang.IllegalStateException异常如何解决

Question

Struts2中文件下载出现java.lang.IllegalStateException异常如何解决

java代码：

package com.elong.oa.web;

import java.io.File;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;

import javax.servlet.ServletContext;

import org.apache.struts2.ServletActionContext;
import org.apache.struts2.util.ServletContextAware;

import com.opensymphony.xwork2.Action;

/**
 * @author Administrator
 *
 */
/**
 * @author Administrator
 *
 */
public class FileDownLoadAction extends BaseAction {
	 private String fileName;
     
     public void setFileName(String fileName) {
             try {
				this.fileName = new String(fileName.getBytes("ISO-8859-1"),"utf-8");
			} catch (UnsupportedEncodingException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
     }
     
     
     public String getFileName() throws Exception  {
    	 //System.out.println(fileName.substring(fileName.lastIndexOf("/"),fileName.length())+"__name");
		 return new String(fileName.substring(fileName.lastIndexOf("\")+1,fileName.length()).getBytes("utf-8"),"ISO-8859-1");
	}


	public InputStream getInputStream() {
    	     
             return ServletActionContext.getServletContext().getResourceAsStream("/" + fileName);
     }
    
     public String execute(){
    	     System.out.println("==========");
    	     System.out.println("/"+fileName);
    	     System.out.println(ServletActionContext.getServletContext().getResourceAsStream("/" + fileName));
             return "success";
     }
	


       
}

struts.xml配置：

<action name="FileDownload" class="com.elong.oa.web.FileDownLoadAction">   
            <result type="stream" name="success">   
                   <param name="contentType">text/plain</param>
                   <param name="inputName">inputStream</param>
                   <param name="contentDisposition">attachment;filename="${fileName}"</param>
                   <param name="bufferSize">8192</param>
            </result>
	    </action>

Answer 1

错误的详细信息帖出来