Struts2文件下载
1 public class DownLoadAction extends ActionSupport{
2
3 private static final long serialVersionUID = 1L;
4 //要下载的文件名
5 private String filename;
6 public String getFilename() {
7 return filename;
8 }
9 public void setFilename(String filename) {
10 this.filename = filename;
11 }
12
13 /**
14 * 这个方法的方法名称是由result的type的属性值对应的类的属性决定的
15 * (inputName)
16 * @throws FileNotFoundException
17 */
18 public InputStream getInputStream() throws FileNotFoundException {
19 String path = ServletActionContext.getRequest().getRealPath("/download/");
20 return new FileInputStream(new File(path, filename));
21 }
22
23 /**
24 * struts2里面的下载
25 * 我们实际被访问的页面只是做了一个页面跳转
26 */
27 public String stream() {
28 return SUCCESS;
29 }
30 }
struts.xml
1 <!DOCTYPE struts PUBLIC 2 "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" 3 "http://struts.apache.org/dtds/struts-2.3.dtd"> 4 <struts> 5 <!-- 配置常量--> 6 <!-- 配置struts2编码常量只针对post提交方式 7 get提交方式的乱码问题需要我们手动解决 8 --> 9 <constant name="struts.i18n.encoding" value="UTF-8"/> 10 <!-- 配置访问action的后缀名 --> 11 <constant name="struts.action.extension" value="action,,"/> 12 <!-- 13 struts.devMode:struts2的开发者模式 14 在开发阶段：我们一般都会设置为true,这样我们在修改struts.xml的时候,就不用重启服务器了 15 生产环境,设置为false 16 --> 17 <constant name="struts.devMode" value="true"/> 18 <!-- 引入关联配置文件 --> 19 <include file="struts-json.xml"/> 20 <include file="struts-upload.xml"/> 21 <include file="struts-download.xml"/> 22 </struts>
struts-download.xml
1 <?xml version="1.0" encoding="UTF-8" ?>
2 <!DOCTYPE struts PUBLIC
3 "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
4 "http://struts.apache.org/dtds/struts-2.3.dtd">
5 <struts>
6 <constant name="struts.multipart.maxSize" value="1000000000"/>
7 <package name="bamaw_download" namespace="/" extends="struts-default">
8 <action name="stream" class="com.tbamaw.web.action.DownLoadAction">
9 <result type="stream" name="success">
10 <param name="contentDisposition">attachment;filename=${filename}</param>
11 </result>
12 </action>
13 </package>
14 </struts>
1 <%@ page language="java" contentType="text/html; charset=UTF-8"
2 pageEncoding="UTF-8"%>
3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
4 <html>
5 <head>
6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
7 <title>Insert title here</title>
8 </head>
9 <body>
10 <a href="${pageContext.request.contextPath }/stream.action?filename=baba.jpg">下载</a>
11 </body>
12 </html>
servlet-api的方式文件下载
1.建立DownLoadAction
2.配置struts.xml
3.发送文件下载请求
时间： 2024-10-24 13:49:48