20171030_chr_download 文件下载改进版

最新推荐文章于 2024-11-20 08:30:55 发布

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最新推荐文章于 2024-11-20 08:30:55 发布

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分类专栏： Struts2 文章标签： download

本文链接：https://blog.youkuaiyun.com/qq_34101492/article/details/78801816

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文件下载改进版

/20171030_chr_download/src/nuc/sw/action/DownloadAction.java

package nuc.sw.action;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

import com.opensymphony.xwork2.ActionSupport;

public class DownloadAction extends ActionSupport {
    private String inputPath;
    private String contentType;
    private String downFileName;
    public String getInputPath() {
        return inputPath;
    }
    public void setInputPath(String inputPath) {    
            try {
                this.inputPath = new String(inputPath.getBytes("iso8859-1"),"utf-8");
            } catch (UnsupportedEncodingException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }       
    }
    public String getContentType() {
        return contentType;
    }
    public void setContentType(String contentType) {
        this.contentType = contentType;
    }
    public String getDownFileName() throws UnsupportedEncodingException {
                return URLEncoder.encode(downFileName, "utf-8");
    }
    public void setDownFileName(String downFileName) {
        try {
            this.downFileName = new String(downFileName.getBytes("iso8859-1"),"utf-8");
        } catch (UnsupportedEncodingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
    //下载文件的入口
    public InputStream getTargetFile() {
        /*InputStream is=ServletActionContext.getServletContext().getResourceAsStream(inputPath);
        System.out.println(is);
        return is;*/
        InputStream is=null;
        try {
            is = new FileInputStream(inputPath);
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return is;
    }
}

/20171030_chr_download/src/struts.xml

<struts>
    <!-- Add packages here -->
    <package name="downloadPackage" namespace="/" extends="struts-default">
      <action name="download" class="nuc.sw.action.DownloadAction">
       <result type="stream">
        <param name="contentType">${contentType}</param>
        <param name="inputName">targetFile</param>
        <param name="contentDisposition">attachment;filename="${downFileName}"</param>     
       </result>
      </action>
     </package>
</struts>

/20171030_chr_download/WebContent/download.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
 <a href="download?inputPath=F:\123.txt&contentType=text/plain&downFileName=123.txt">使用struts2框架下载</a>
 </form>
</body>
</html>