基于jsp的AJAX多文件上传的实例
最近的项目开发中，遇到了一个多文件上传的问题，即在不刷新页面的情况下，上传多个文件至服务器。现总结分享如下：
本文主要采用了基于jsp的ajax，jquery，servlet等技术。
1.upload.jsp
点击上传时，调用对应的fileupload函数，通过ajax将文件异步传送到servlet中处理。注意在文件上载时，所使用的编码类型应当是“multipart/form-data”，它既可以发送文本数据，也支持二进制数据上载。
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
Insert title here
2.PictureServlet.java
通过该servlet接受jsp上传的数据流，存储到相应路径，并解析出文件名。
package com.servlet;
import java.io.BufferedOutputStream;
import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.ServletInputStream;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.realty.base.action.BuildingAction;
/**
* Servlet implementation class PictureServlet
*/
@WebServlet("/PictureServlet")
public class PictureServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public PictureServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doPost(request,response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
response.setContentType("text/xml");//是xml
response.setHeader("Cache-Control", "no-cache");
response.setCharacterEncoding("UTF-8");
String filepath ="E:/pic/";//文件上传的路径，实际开发中一般用相对路径
String filename = "";
String name="";
ServletInputStream in = request.getInputStream();
byte[] buf = new byte[4048];
int len = in.readLine(buf, 0, buf.length);
String f = new String(buf, 0, len - 1);
while ((len = in.readLine(buf, 0, buf.length)) != -1) {
filename = new String(buf, 0, len,"utf-8");//解决汉字乱码问题
int j = filename.lastIndexOf("\"");
int s = filename.indexOf("filename");
name=filename.substring(s+10,j);
filename = name;//通过上述处理可以得到上传的文件名
System.out.println("filename="+filename);
DataOutputStream fileStream = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(filepath+ filename)));
len = in.readLine(buf, 0, buf.length);
len = in.readLine(buf, 0, buf.length);
while ((len = in.readLine(buf, 0, buf.length)) != -1) {
String tempf = new String(buf, 0, len - 1);
if (tempf.equals(f) || tempf.equals(f + "--")) {
break;
}
else{
fileStream.write(buf, 0, len); // 写入
}
}
fileStream.close();
}
PrintWriter out=response.getWriter();
String result = filename ;
out.print(result);
out.close();
in.close();
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持中文源码网。