文件的下载
下载的界面：
<%@ 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>文件的下载</title>
</head>
<body>
<a href="fileDownload.action">下载图片</a>
</body>
</html>
action代码：
package action; import java.io.InputStream; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; public class FileDownload extends ActionSupport{ //指定文件的下载的路径 private String path; public String getPath() { return path; } public void setPath(String path) { this.path = path; } //该方法返回一个InputStream类型的输入流。是下载目标的文件的入口 public InputStream getInputStream()throws Exception{ return ServletActionContext.getServletContext().getResourceAsStream(path); } public String execute()throws Exception{ return SUCCESS; } }
struts.xml代码：
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"> <struts> <!-- 指定国际化资源文件的baseName为globalMessages --> <constant name="struts.custom.i18n.resources" value="globalMessages"/> <!-- 设置该应用使用的解码集 --> <constant name="struts.i18n.encoding" value="GBK"/> <package name="lee" extends="struts-default"> <!-- 配置处理文件上传的Action --> <action name="upload" class="action.UploadAction"> <!-- 动态设置Action的属性值 --> <param name="savePath">/upload</param> <!-- 配置Struts2默认的视图页面 --> <result>/succ.jsp</result> </action> <action name="fileDownload" class = "action.FileDownload"> <param name="path">/download/bg.jpg</param> <result name="success" type = "stream"> <!-- 设置stream属性对应的参数 --> <param name="contentType">image/jpg</param> <param name="inputName">inputStream</param> <param name="contentDisposition">attachment;filename="hlm.jpg" </param> <param name="bufferSize">40960</param> </result> </action> </package> </struts>
原文：http://www.cnblogs.com/aicpcode/p/4184798.html