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Servlet3.0新特性之批量上传

2016-10-19 11:20 405 查看

package com.xxx.action;

import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Collection;

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;

/**
* 批量上传文件
* @author Administrator
*
*/
@WebServlet(name="uploadPart",urlPatterns="/uploadPart")
@MultipartConfig
public class UploadPartServlet extends HttpServlet {

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
req.setCharacterEncoding("GBK");
resp.setCharacterEncoding("GBK");
resp.setContentType("text/html;charset=GBK");
//上传文件存储位置
String path=this.getServletContext().getRealPath("/WEB-INF/upload");
Collection<Part> parts=req.getParts();
for(Part part:parts){
//只处理上传文件区段
if (part.getName().startsWith("file")) {
String header=part.getHeader("content-disposition");
//System.out.println(header); //form-data; name="file2"; filename="11.jpg"
//String[] strArr=header.split(";");
//System.out.println(strArr.length);
//String[] tempName=strArr[2].split("=");
//String fileNmae=tempName[1].replaceAll("\"", "");
//System.out.println(fileNmae);
String fileName=getFileName(part);
part.write(path+File.separator+fileName);
}
}
}

private String getFileName(Part part) {
String header = part.getHeader("Content-Disposition");
String fileName = header.substring(header.indexOf("filename=\"") + 10, header.lastIndexOf("\""));
header.lastIndexOf("\"");
return fileName;
}

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
doGet(req, resp);
}
}

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%
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>My JSP 'upload.jsp' starting page</title>
</head>

<body>
<form action="${pageContext.request.contextPath}/uploadPart" method="post" enctype="multipart/form-data">
<input type="file" name="file1"><br>
<input type="file" name="file2"><br>
<input type="submit">
</form>
</body>
</html>

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