在struts.xml中配置如下

1         
     
      2             
      
       3                 
       application/octet-stream4                 
       inputStream
       5                 
       attachment;filename=${filename}
       6             
      
     

jsp页面中

user为action中传来的

1           
     
      2               
      3               
      4           
     5           下载

在User.java中

 

 

class User{    private String path;        //文件保存的路径    private String filename;    //文件名//文件下载  固定名字    private InputStream inputStream;    public InputStream getInputStream() {        return inputStream;    }    public void setInputStream(InputStream inputStream) {        this.inputStream = inputStream;    }    public String download()    {        String storePath=ServletActionContext.getServletContext().getRealPath("/files");        System.out.println("before" +path +"   "+ filename);　　　　　　　　//事实证明struts2中处理了相关参数, 并且通过url传输传给 path, filename中的值//        path=ServletActionContext.getRequest().getParameter("path");//        filename=ServletActionContext.getRequest().getParameter("filename");        System.out.println("after" +path +"   "+ filename);        try {            inputStream=new FileInputStream(storePath+"\\"+path+"\\"+filename);        } catch (FileNotFoundException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        return this.SUCCESS;    }}