SmartUpload實現文件上傳時file和表單文本同時提交的問題

時間 2019-11-05

標籤 smartupload 實現文件上傳 file 表單文本同時提交問題欄目 HTML 简体版

原文原文鏈接

JSP頁面：css

<%@ page language="java" import="java.util.*" 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>My JSP 'index.jsp' starting page</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->
  </head>
  
  <body>
    <form action="UploadServlet" enctype="multipart/form-data" method="post">
            用戶姓名：<input type="text" name="userName" /><br/>
            上傳頭像：<input type="file" name="userPhoto" /><br/>
            <input type="submit" value="提交">
    </form>
  </body>
</html>

Servlet代碼：html

package com.gy.servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.jspsmart.upload.File;
import com.jspsmart.upload.SmartUpload;

public class UploadServlet extends HttpServlet {

    /**
     * Constructor of the object.
     */
    public UploadServlet() {
        super();
    }

    /**
     * Destruction of the servlet. <br>
     */
    public void destroy() {
        super.destroy(); // Just puts "destroy" string in log
        // Put your code here
    }

    /**
     * The doGet method of the servlet. <br>
     *
     * This method is called when a form has its tag value method equals to get.
     * 
     * @param request the request send by the client to the server
     * @param response the response send by the server to the client
     * @throws ServletException if an error occurred
     * @throws IOException if an error occurred
     */
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doPost(request, response);
    }

    /**
     * The doPost method of the servlet. <br>
     *
     * This method is called when a form has its tag value method equals to post.
     * 
     * @param request the request send by the client to the server
     * @param response the response send by the server to the client
     * @throws ServletException if an error occurred
     * @throws IOException if an error occurred
     */
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        response.setContentType("text/html");
        request.setCharacterEncoding("utf-8");
        response.setCharacterEncoding("utf-8");
        PrintWriter out = response.getWriter();
        try{
            SmartUpload su = new SmartUpload();//建立SmartUpload對象
            su.setCharset("utf-8");//設置編碼
            su.initialize(this.config,request,response);//初始化設置             
            su.setAllowedFilesList("gif,bmp,jpg");//設置容許上傳的文件擴展名
            su.setMaxFileSize(2*1024*1024);//設置單個文件容許最大長度(單位：字節)
            su.setTotalMaxFileSize(10*1024*1024);//設置上傳文件的總大小(單位：字節)
            su.upload();//將文件數據上傳
            //注意：使用SmartUpload對象獲取request這句代碼要放在upload()方法後面，不然拿不到數據
            out.print(su.getRequest().getParameter("userName"));
            File f = su.getFiles().getFile(0);//獲取第一個上傳文件
            String savePath = "upload\\";
            savePath += f.getFileName();//組裝存儲路徑
            f.saveAs(savePath);//將文件保存到指定位置
            out.println("上傳成功！");
        }catch(Exception ex){
            ex.printStackTrace();
            out.println("上傳異常："+ex.getMessage());
        }
        out.flush();
        out.close();
    }

    private ServletConfig config;
    /**
     * Initialization of the servlet. <br>
     *
     * @throws ServletException if an error occurs
     */
    public void init(ServletConfig config) throws ServletException {
        // Put your code here
        this.config = config;
    }

}