struts2--页面传递文件名下载

来源：互联网发布：js解析json数组 map 编辑：程序博客网时间：2024/06/05 14:49

页面jsp

action 控制层

package com.imooc.action;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class FileDownloadAction extends ActionSupport {
public String inputPath;//文件下载的路径
public String filename;
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;
}
@Override
public String execute() throws Exception {
return SUCCESS;
}

public InputStream getInputStream() throws IOException{
//获取下载路径
String path = ServletActionContext.getServletContext().getRealPath("/images");
//对应文件的路径
String filepath = path+"\\"+filename;
//得到下载的文件
File file = new File(filepath);
//把文件信息以流的方式返回
return FileUtils.openInputStream(file);

//return ServletActionContext.getServletContext().getResourceAsStream(inputPath);
}
public String getDownloadFileName(){
String downloadFileName="";
try {
downloadFileName=URLEncoder.encode("下载文件.jpg", "UTF-8");
} catch (UnsupportedEncodingException e) {

e.printStackTrace();
}
return downloadFileName;
}
}

struts.xml

<action name="download" class="com.imooc.action.FileDownloadAction">
<param name="inputPath">/images/img3-lg.jpg</param>
<result name="success" type="stream">
<param name="contentType">application/octet-stream</param>
<param name="inputName">inputStream</param>
<param name="contentDisposition">attachment;filename="${downloadFileName}"</param>
<param name="bufferSize">8192</param>
</result>
</action>

阅读全文

0 0