框架雖好，開發效率很高，但是生產之後運行的效率真的有那麼一點點憂傷，所以不是大型的項目我都喜歡原生態的JSP+Servlet。
最近看黎明活老師的Android開發視頻，看到一個fileupload上傳工具，所以分享一下。
首先需要commons-fileupload-1.2.1.jar、commons-io-2.4.jar這兩個jar包，在Apache的官網上可以下載最新的。
Servlet：
package com.zjoa.servlet;
import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.UUID;
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.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
public class UploadServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost( request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
if(isMultipart){
FileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload fileUpload = new ServletFileUpload(factory);
try {
List<FileItem> items = fileUpload.parseRequest(request);
//String dir = request.getSession().getServletContext().getRealPath("/files");
String dir="d:/";
File firFile = new File(dir);
if(firFile.exists()){firFile.mkdirs();}
for (FileItem fileItem : items) {
if(fileItem.isFormField()){//文本類型
String name = fileItem.getFieldName();
String value = fileItem.getString();
System.out.println(name + "=" + value);
} else {//如果是文件類型
System.out.println(dir);
String strPath = fileItem.getName();//得到文件的路徑
String strName = UUID.randomUUID().toString();
int length = strPath.lastIndexOf('.');
strName = strName + strPath.substring(length);
System.out.println(strName);
File file = new File(firFile, strName);
fileItem.write(file);
}
}
} catch (FileUploadException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
<%@ 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=ISO-8859-1">
<title>上傳</title>
</head>
<body>
<form action="upload.do" method="post" enctype="multipart/form-data">
片名：<input type="text" name="title" /><br />
時常：<input type="text" name="timelength" /><br />
文件：<input type="file" name="info" /><br />
<input type="submit" value="提交" />
</form>
</body>
</html>