文件下载

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创建action

public class DownloadAction extends ActionSupport{

privateFile[]files;

publicString list(){

//取得文件保存路径

Stringpath=ServletActionContext.getServletContext().getRealPath("/upload");

File f=new File(path);

//获取目录下保存的文件

files=f.listFiles();

return"list";

}

//省略get/set

}

配置struts.xml

<actionname="*down" class="base.MyFileUpload"method="{1}">

<result name="list">/filelist.jsp</result>

</action>

创建fileslist.jsp

<body>

<c:forEachitems="${files }"var="f">

${f.name}<br/>

</c:forEach>

</body>

修改action代码

public class DownloadAction extends ActionSupport{

privateFile[]files;

privateStringfileName;

publicString list(){

//取得文件保存路径

Stringpath=ServletActionContext.getServletContext().getRealPath("/upload");

File f=new File(path);

//获取目录下保存的文件

files=f.listFiles();

return"list";

}

publicInputStream getDownloadFile()throws Exception{

String filePath =ServletActionContext.getRequest()

.getServletContext().getRealPath("/upload/"+fileName);

InputStream is = new FileInputStream(new File(filePath));

//解决下载文件名称问题

fileName=URLEncoder.encode(fileName,"UTF-8");

returnis;

}

publicvoid setFileName(String fileName)throws UnsupportedEncodingException {

//处理get请求中文乱码

this.fileName =newString(fileName.getBytes("iso8859-1"),"utf-8");

}

publicFile[] getFiles() {

returnfiles;

}

publicvoid setFiles(File[] files) {

this.files = files;

}

publicString getFileName() {

returnfileName;

}

修改struts.xml文件

<actionname="*down" class="base.DownloadAction"method="{1}">

<result name="list">/filelist.jsp</result>

<!-- 下载的文件数据存放的方法，该方法返回一个InputStream

例如取值为inputStream的属性需要编写getInputStream()方法-->

<param name="inputName">downloadFile</param>

attachment;filename=${fileName}

</param>

</result>

</action>

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