01.创建一个下载的页面 （我们的下载是把文件的路径写成固定的）
<body> <form action="user/download" method="post"> <input type="text" name="download"/> <input type="submit" value="下载"/> </form> </body>
02.创建对应的struts.xml文件
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts> <!--设置开发模式 --> <constant name="struts.devMode" value="true"/> <package name="default" namespace="/user" extends="struts-default"> <!-- 文件下载 --> <action name="download" class="cn.bdqn.action.DownloadAction" method="download"> <result name="input">/error.jsp</result> <result type="stream"> <!-- ${fileName} 后台获取的fileName --> <param name="contentDisposition">attachment;filename=${fileName}</param> </result> </action> </package> </struts>
03.创建对应Action
public class DownloadAction extends ActionSupport { private String download; //文件下载的路径 private String fileName; //下载的文件名称 private InputStream inputStream; //创建输入流对象 //文件下载 public String download(){ try { inputStream=new FileInputStream(download); // E:U1cat.jpg 只获取文件名 int index=download.lastIndexOf("\"); fileName=download.substring(index+1); //防止下载时候中文乱码 try { fileName=URLEncoder.encode(fileName, "utf-8"); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } } catch (FileNotFoundException e) { e.printStackTrace(); return INPUT; } return SUCCESS; } public String getDownload() { return download; } public void setDownload(String download) { this.download = download; } public String getFileName() { return fileName; } public void setFileName(String fileName) { this.fileName = fileName; } public InputStream getInputStream() { return inputStream; } public void setInputStream(InputStream inputStream) { this.inputStream = inputStream; } }
