servlet3.0新特性源代码

package com.org.servlet3; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.MultipartConfig; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.Part; /** * @project servlet3.0 * servlet3.0的文件上传 * @date:2012-5-21 *在创建项目的时候首先添加Tomcat7.x的支持,然后把apache-tomcat-7.0.27\conf\web.xml拷贝到项目WEB-INF目录下 *把之前的web.xml覆盖.. 配置留下 &lt;?xml version="1.0" encoding="ISO-8859-1"?&gt; <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app> */ @SuppressWarnings("all") @WebServlet(name="fileUploadServlet",urlPatterns="/fileUploadServlet") @MultipartConfig(maxRequestSize=222222)//设置文件上传大小 public class FileUploadServlet extends HttpServlet { /** *访问 *http://localhost:8080/servlet3.0/ */ protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { req.setCharacterEncoding("utf-8"); Part part=req.getPart("file"); //获取页面的name //System.out.println(part.getName()); System.out.println(System.getProperty("user.dir"));//输出当前的项目存放的路径 String uploadPath=req.getSession().getServletContext().getRealPath("/upload"); System.out.println(uploadPath);//输出上传的文件路径 String value=part.getHeader("content-disposition");//设置头信息 System.out.println(value); String sub=value.substring(value.lastIndexOf("=")+2,value.length()-1);//截取文件 System.out.println("file size: \t"+part.getSize());//文件的大小 part.write(uploadPath+sub);//写入文件 } }