利用commons-fileupload实现文件上传

本来想自己实现文件上传的，但是这需要对流进行分析，我就先用了Apache Commons组件实现。因为这段时间很忙，只好等过一段时间好好研究下，自己实现一个不依赖于第三方jar包的文件上传。

　　用了fileuploa组件后，文件上传简单多了。这里采用Ｓervlet实现文件上传，用到的第三方组建就只有一个fileupload和commos-io，commons－io是fileupload要用到的包.

1.处理上传操作的Servlet--FileUploadApache

package fileupload;import java.io.File;import java.io.IOException;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.fileupload.FileItem;import org.apache.commons.fileupload.FileUploadException;import org.apache.commons.fileupload.servlet.ServletFileUpload;public class FileUploadApache extends HttpServlet {private static final long serialVersionUID = 1L; private static final String REPOSITORY= "/home/zxj/apache/"; public FileUploadApache() { super(); }protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {doPost(request,response);}@SuppressWarnings("unchecked")protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {ServletFileUpload sfu = new ServletFileUpload();try {List<FileItem> li = sfu.parseRequest(request);for(int i = 0; i < li.size(); i ++){FileItem fi = li.get(i);if("uploadFile".equals(fi.getFieldName())){fi.write(new File(REPOSITORY+fi.getName()));}}} catch (FileUploadException e) {e.printStackTrace();} catch (Exception e) {e.printStackTrace();}}}

2.web.xml的配置

<servlet><description>利用commons-fileupload包辅助完成文件上传</description><display-name>FileUploadApache</display-name><servlet-name>FileUploadApache</servlet-name><servlet-class>fileupload.FileUploadApache</servlet-class></servlet><servlet-mapping><servlet-name>FileUploadApache</servlet-name><url-pattern>/FileUploadApache</url-pattern></servlet-mapping>

3.upload-view.jsp

<%@ 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>文件上传</title><mce:script type="text/javascript"></mce:script></head><body><center>实现文件上传<form action="#" method="post" enctype="multipart/form-data" name="fileupload" id="fileupload">文件<input type="file" name="uploadFile"><br/><input type="submit" value="上传" onclick="doupload(this)" name="FileUploadNoDependency" title="无第三方依赖文件上传" style=" width : 48px;" mce_style=" width : 48px;"><br/><input type="submit" value="上传" onclick="doupload(this)" name="FileUploadApache" title="利用commons-fileupload包辅助完成文件上传"></form><hr/></center></body></html>

说明：这里有两个按钮，一个是采用Ａpache包，一个是不依赖，不依赖我还没实现，也是暂时还不想实现。

4.部署到Ｔomcat或其他Ｗeb容器就可以通过浏览器访问了。

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利用commons-fileupload实现文件上传

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