java组件smartupload实现上传文件功能_JAVA教程

java组件smartupload实现上传文件功能

2020-06-23 12:59pop1030123 JAVA教程

这篇文章主要为大家详细介绍了java组件smartupload实现上传文件功能,具有一定的参考价值，感兴趣的小伙伴们可以参考一下

使用jsp和serlvet来实现最简单的上传，供大家参考，具体内容如下

1、页面index.jsp

				?

									<%@ page language="java" pageEncoding="UTF-8"%> 

									<% 

									String path = request.getContextPath(); 

									String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 

									%> 

									<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 

									<html> 

									 <head> 

									 <base href="<%=basePath%>"> 

									 <title>index.jsp</title> 

									 <meta http-equiv="pragma" content="no-cache"> 

									 <meta http-equiv="cache-control" content="no-cache"> 

									 <meta http-equiv="expires" content="0"> 

									 </head> 

									 <body> 

									 <form action="upload" method="post" enctype="multipart/form-data"> 

									 <br> 

									 姓名：<input type="text" name="uname"/> 

									 <br> 

									 上传文件:<input type="file" name="pic"/> 

									 <br> 

									 <input type="submit" value="提交"></input> 

									 </form> 

									 </body> 

									</html>

2、action跳转到了upload的servlet，所以要web.xml里面配置，web.xml:

				?

									<?xml version="1.0" encoding="UTF-8"?> 

									<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"

									 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

									 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 

									 http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> 

									 <servlet> 

									 <servlet-name>uploadAction</servlet-name> 

									 <servlet-class>com.pop.action.SmartuploadAction</servlet-class> 

									 </servlet> 

									 <servlet-mapping> 

									 <servlet-name>uploadAction</servlet-name> 

									 <url-pattern>/upload/*</url-pattern> 

									 </servlet-mapping> 

									 <welcome-file-list> 

									 <welcome-file>index.jsp</welcome-file> 

									 </welcome-file-list> 

									</web-app>

3、映射到的action文件，SmartuploadAction.java:

				?

									package com.pop.action; 

									import java.io.IOException; 

									import javax.servlet.ServletException; 

									import javax.servlet.http.HttpServlet; 

									import javax.servlet.http.HttpServletRequest; 

									import javax.servlet.http.HttpServletResponse; 

									import javax.servlet.jsp.JspFactory; 

									import javax.servlet.jsp.PageContext; 

									import com.soft4j.httpupload4j.Request; 

									import com.soft4j.httpupload4j.SmartUpload; 

									import com.soft4j.httpupload4j.SmartUploadException; 

									public class SmartuploadAction extends HttpServlet { 

									 private static final long serialVersionUID = -8610555375032925108L; 

									 @Override

									 protected void doPost(HttpServletRequest req, HttpServletResponse resp) 

									  throws ServletException, IOException { 

									 req.setCharacterEncoding("utf-8"); 

									 resp.setCharacterEncoding("utf-8"); 

									 SmartUpload su = new SmartUpload(); 

									 // 由于multipart/form-data的传输原因导致req不能使用，所以使用smartupload产生的request 

									 Request reqest = su.getRequest(); 

									 // 获得pageContext对象 

									 PageContext pageContext = JspFactory.getDefaultFactory() 

									  .getPageContext(this, req, resp, null, true, 8192, true); 

									 su.initialize(pageContext); 

									 try { 

									  su.upload(); 

									  // 上传到本项目的upload目录 

									  su.save("upload"); 

									 } catch (SmartUploadException e) { 

									  e.printStackTrace(); 

									 } 

									 // 使用smartupload产生的reqest对象来获得页面传递的参数 

									 String uname = reqest.getParameter("uname"); 

									 System.out.println(uname); 

									 } 

									}