【重构】 利用 cos 组件实现jsp中上传附件

时间：2022-10-11 07:55:04

利用JSP&Servlet重构项目 利用 cos 组件实现jsp中上传附件

fileUpload.jsp --> FileUploadController.java --> fileUploadResult.jsp

fileUpload.jsp

<%@ 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=UTF-8">

<title>文件上传demo</title>

<link href="/web01//css/main.css" rel="stylesheet" type="text/css" />

</head>

<%@ include file="top.jsp" %>

<body>

    <form action="/web01/fileUploadController" name="frm1" method="post" enctype="multipart/form-data">

        文件名：<input type="file" name="file1" size="50"><br>

        <input type="submit" value="上传">

    </form>

</body>

<%@ include file="bottom.jsp" %>

</html>

FileUploadController.java

package com.test.IF.controller;

import java.io.IOException;

import java.util.Enumeration;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import com.oreilly.servlet.MultipartRequest;

import com.oreilly.servlet.multipart.DefaultFileRenamePolicy;

/**

 * Servlet implementation class FileUploadController

 */

@WebServlet("/fileUploadController")

public class FileUploadController extends HttpServlet {

    private static final long serialVersionUID = 1L;

    /**

     * @see HttpServlet#HttpServlet()

     */

    public FileUploadController() {

        super();

    }

    /**

     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)

     */

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        this.doPost(request, response);

    }

    /**

     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)

     */

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        // 文件要保存的路径

        String savePath = "d:/test/uploadfile/";

        int sizeLimit = 30 * 1024 * 1024;

        String fileName = "";

        String fileSystemName = "";

        long fileSize = 0;

        MultipartRequest multi = new MultipartRequest(request, savePath, sizeLimit, "UTF-8", new DefaultFileRenamePolicy());

        Enumeration fileNames = multi.getFileNames();

        while (fileNames.hasMoreElements()) {

            fileName = (String) fileNames.nextElement();

            fileSystemName = multi.getFilesystemName(fileName);

            if (fileSystemName != null) {

                fileSize = multi.getFile(fileName).length() / 1024;

            }

        }

        request.setAttribute("fileSystemName", fileSystemName);

        request.setAttribute("fileSize", fileSize);

        request.getRequestDispatcher("/view/fileUploadResult.jsp").forward(request, response);

    }

}

fileUploadResult.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<!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=UTF-8">

<title>文件上传demo</title>

<link href="/web01//css/main.css" rel="stylesheet" type="text/css" />

</head>

<%@ include file="top.jsp" %>

<body>

文件上传成功！<br>

文件名：<c:out value="${requestScope.fileSystemName }"></c:out><br>

文件大小：<c:out value="${requestScope.fileSize }"></c:out>

</body>

<%@ include file="bottom.jsp" %>

</html>

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