struts2实现文件下载功能

strust2.xml:

 

 <!--下载  -->
  <action name="downloadFileAction" class="cn.tdtk.gtxy.mm.basicSettings.action.DownloadAction">
            <result name="success" type="streamx"> 
               <param name="contentType">application/octet-stream</param> 
               <param name="inputName">inputStream</param> 
               <param name="contentDisposition">attachment;filename="${downloadFileName}"</param> 
               <param name="bufferSize">1024</param> 
            </result> 
  </action>

 

action类：

 

import java.io.File; 
import java.io.FileInputStream; 
import java.io.InputStream; 
 

import java.net.URLDecoder;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport; 
 
public class DownloadAction extends ActionSupport { 
 
     
    private static final long serialVersionUID = -7758584364932001138L; 
     
    private InputStream inputStream; 
    private String downloadFileName;
    @Override 
    public String execute() throws Exception {
     String fileName1=URLDecoder.decode(ServletActionContext.getRequest().getParameter("fileName"),"UTF-8");
     String proPath=ServletActionContext.getServletContext().getRealPath("/");
      String realPath=proPath+"Fileupload\\mmDocLoad\\"+fileName1;
      System.out.println("realPath======:"+realPath);
         inputStream = new FileInputStream(new File(realPath)); 
         return SUCCESS; 
    } 
    public String getDownloadFileName() {
        String fileName=ServletActionContext.getRequest().getParameter("fileName");
        downloadFileName = fileName;
        try {
         downloadFileName = new String(downloadFileName.getBytes(), "ISO8859-1");
        } catch (Exception e) {
         e.printStackTrace();
        }
        //System.out.println("file name=============:"+downloadFileName);
        return downloadFileName;
     }

    public InputStream getInputStream() { 
        return inputStream; 
    } 
 
    public void setInputStream(InputStream inputStream) { 
        this.inputStream = inputStream; 
    }  
      
}
JS:

function downLoad123(){
 var strName = encodeURI(encodeURI('下载测试手册.doc'));
 var downUrl = root+'/basicSettings/downloadFileAction?fileName='+strName+'';
 $('#aaaa').attr('href',downUrl)
}

jsp:

<a href="#" id="aaaa"  onclick="downLoad123();">下载</a>