Struts2下载

package com.tcf.action;

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;

import com.opensymphony.xwork2.ActionSupport;

public class DownLoadAction extends ActionSupport {
    private String inputPath;
    private String fileName;
    private InputStream  inputStream;
    private String contentType;
    
    public String getInputPath() {
        return inputPath;
    }


    public void setInputPath(String inputPath) {
        this.inputPath = inputPath;
    }


    public String getFileName() {
        return fileName;
    }


    public void setFileName(String fileName) {
        this.fileName = fileName;
    }
    
    public String getContentType() {
        return contentType;
    }


    public InputStream getInputStream() {
        return inputStream;
    }


    public void setInputStream(InputStream inputStream) {
        this.inputStream = inputStream;
    }


    public void setContentType(String contentType) {
        this.contentType = contentType;
    }

    public String execute(){
        try {
            this.inputStream = new BufferedInputStream(new FileInputStream(inputPath+"/"+fileName));
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return SUCCESS;
    }
}

struts.xml

<action name="download" class="com.tcf.action.DownLoadAction">
    <param name="inputPath">E:/temp</param>
    <param name="fileName">back.gif</param>
    <result type="stream">
        <param name="contentType">image/gif</param>
        <param name="inputName">inputStream</param>
        <!-- 附件 -->
        <param name="contentDisposition">
                attachment;filename="${fileName}"
        </param>
        <param name="bufferSize">4096</param>
    </result>
</action>

download.jsp

<a href="download.action" >下载</a>