长春做网络推广的公司,淄博优化网站排名,网络免费,学校的网站的代码模板下载功能介绍#xff1a;利用 Servlet 和表单提交#xff0c;选择本地文件上传到服务器。上传的文件可以是文本文件或图像文件或任何文档#xff0c;不能是文件夹。需要引入的 jar 文件#xff1a;commons-fileupload-1.3.2、commons-io-2.5.jar。下载链接#xff1a;将下载好…功能介绍利用 Servlet 和表单提交选择本地文件上传到服务器。上传的文件可以是文本文件或图像文件或任何文档不能是文件夹。需要引入的 jar 文件commons-fileupload-1.3.2、commons-io-2.5.jar。下载链接将下载好的jar包复制到项目/WebContent/WEB-INF/lib 文件夹下实现代码fileUpload.jsp:文件上传的界面页pageEncodingUTF-8%文件上传文件上传选择一个文件FileUploadServlet.java:文件上传处理package com.company.project.servlet.fileupload;import java.io.File;import java.io.IOException;import java.io.PrintWriter;import java.util.List;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 org.apache.commons.fileupload.FileItem;import org.apache.commons.fileupload.FileUploadException;import org.apache.commons.fileupload.disk.DiskFileItemFactory;import org.apache.commons.fileupload.servlet.ServletFileUpload;WebServlet(/file-upload-servlet)public class FileUploadServlet extends HttpServlet {private static final long serialVersionUID 1L;// 文件上传的存储路径private static final String SAVE_PATH file-upload;// 上传配置// 配置内存临界值private static final int MEMORY_THRESHOLD 1024 * 1024 * 3; // 3MB// 配置最大文件大小private static final int MAX_FILE_SIZE 1024 * 1024 * 40; // 40MB// 配置请求大小private static final int MAX_REQUEST_SIZE 1024 * 1024 * 50; // 50MBpublic FileUploadServlet() {super();}protected void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doPost(request, response);}protected void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {// 检测是否为多媒体文件if (!ServletFileUpload.isMultipartContent(request)) {// 如果不是则停止PrintWriter out response.getWriter();out.println(表单必须包含 enctypemultipart/form-data);out.flush();out.close();return;}// 配置上传参数DiskFileItemFactory factory new DiskFileItemFactory();// 设置内存临界值 - 超过后将产生临时文件并存储于临时目录中factory.setSizeThreshold(MEMORY_THRESHOLD);ServletFileUpload upload new ServletFileUpload(factory);// 设置上传文件最大值upload.setFileSizeMax(MAX_FILE_SIZE);// 设置最大请求值(包含文件和表单数据)upload.setSizeMax(MAX_REQUEST_SIZE);// 中文处理upload.setHeaderEncoding(UTF-8);// 创建保存路径String uploadPath request.getServletContext().getRealPath(./) File.separator SAVE_PATH;// 如果路径不存在则创建File uploadDir new File(uploadPath);if (!uploadDir.exists()) {uploadDir.mkdir();}try {SuppressWarnings(unchecked)List formItems upload.parseRequest(request);if (formItems ! null formItems.size() 0) {//迭代表单数据for (FileItem fileItem : formItems) {//处理不在表单的字段if(!fileItem.isFormField()) {String fileName new File(fileItem.getName()).getName();String filePath uploadPath File.separator fileName;File storeFile new File(filePath);// 在控制台输出文件的上传路径 System.out.println(filePath);// 保存文件到硬盘 fileItem.write(storeFile);request.setAttribute(message,文件上传成功!);}}}} catch (FileUploadException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (Exception e) {request.setAttribute(message,错误信息: e.getMessage());}//文件上传完成跳转request.getServletContext().getRequestDispatcher(/page/UploadMes.jsp).forward(request, response);}}UploadMes.jsp:文件传输完成跳转页pageEncodingUTF-8%文件上传结果${message }效果图
