Struts2文件下载

最新推荐文章于 2024-06-29 22:48:48 发布

原创最新推荐文章于 2024-06-29 22:48:48 发布 · 466 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#struts #下载

1、download.jsp

<body>
     <h1>文件下载内容：</h1><br/>
         banner.jpg下载地址：<a href="FileDownLoad?num=1">点击下载1</a>
         <br/><br/>
         banner.rar下载地址：<a href="FileDownLoad?num=2">点击下载2</a>

  </body>

2、FileDownLoad.java

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

import com.opensymphony.xwork2.ActionSupport;

/**
 * 文件下载Action
 * @author hanwen
 *
 * 2015-5-23 下午07:50:33
 */
public class FileDownLoad extends ActionSupport{

    private int num;

    private String file;

    private InputStream inputStream;

    public String execute(){
        if(1 == num){
            this.file = "banner.jpg";
            //获取资源路径
            //inputStream = ServletActionContext.getServletContext().getResourceAsStream("E:\\images\\banner.jpg");
            try {
                inputStream = new FileInputStream(new File("E:\\images\\banner.jpg"));
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            }
        }else if(2 == num){
            this.file = "banner.rar";
            //获取资源路径
            try {
                inputStream = new FileInputStream(new File("E:\\images\\banner.rar"));
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            }
        }
        return SUCCESS;
    }

    public int getNum() {
        return num;
    }

    public void setNum(int num) {
        this.num = num;
    }

    public String getFile() {
        return file;
    }

    public void setFile(String file) {
        this.file = file;
    }

    public InputStream getInputStream() {
        return inputStream;
    }

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

3、struts.xml

<package name="default" namespace="/" extends="struts-default">
        <!-- 文件下载 -->
        <action name="FileDownLoad" class="com.hanwen.action.FileDownLoad">
            <!-- 结果类型必须写成type="stream",与之对应的处理类是 org.apache.struts2.dispatcher.StreamResult -->
            <result type="stream">
               <!-- 下载文件的文件类型，application/octet-stream 表示不限制下载类型 -->
               <param name="contentType">application/octet-stream</param>
               <!-- attachment;fileName=${在Action 类中获取的文件名} -->
               <param name="contentDisposition">attachment;fileName=${file}</param>
               <!-- 下载文件的文件位置 -->
               <param name="inputName">inputStream</param>
               <!-- 下载文件的缓冲大小 -->
               <param name="bufferSize">10240</param> 
            </result>
        </action>

    </package>