在 两篇我们主要说的是文件的上传，既然有上传那就有下载，那么咱们看一下struts里面是怎么个下载法！
1.写个文件下载的表单页面：
<a href="downLoad.action?fileName=1111.jpg">下载文件</a>
很简单的我们写一行就行，需要注意的是，既然你要下载的是111.jpg文件，那么你的服务器里面肯定得有一个111.jpg在里面放着才能供你下载，要不然会报错的！！！
接着我们写一下DownLoadAction里面的方法：
package org.web; import java.io.BufferedInputStream; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.InputStream; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; public class DownLoadAction extends ActionSupport { private String inputPath; private String fileName; private String contentType; private InputStream inputStream; public String excute(){ return SUCCESS; } 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; } public String getContentType() { return contentType; } public void setContentType(String contentType) { this.contentType = contentType; } public InputStream getInputStream() throws FileNotFoundException { String path=ServletActionContext.getServletContext().getRealPath(inputPath); return new BufferedInputStream(new FileInputStream(path+"/"+fileName)); } public void setInputStream(InputStream inputStream) { this.inputStream = inputStream; } }
这个 DownLoadAction里面很简单，重要的是struts.xml配置文件里面的东西，那么请大家看：
<!-- 文件下载 --> <action name="downLoad" class="org.web.DownLoadAction"> <param name="inputPath">/upload</param> <result name="success" type="stream"> <param name="contentType">application/octet-stream</param> <param name="inputName">inputStream</param> <param name="contentDisposition"> attachment;filename="${fileName}" </param> <param name="bufferSize">4096</param> </result> </action>
这些文件上传和下载都是固定的套路，直接拿出来套上用就行！！！
