1.需求场景
利用servlet3.0 实现文件上传
2.项目环境
servlet jsp javabean
3.功能实现
package com.demo.action; import java.io.File; import java.io.IOException; import java.util.List; 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; @WebServlet("/uploadServlet") @MultipartConfig public class UploadServlet extends HttpServlet { private static final long serialVersionUID = 1L; @Override protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("UTF-8"); response.setContentType("text/html;charset=UTF-8"); String status="success"; String fileName="demo"; request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); response.setContentType("text/html;charset=utf-8"); // 存储路径 String savePath = request.getServletContext().getRealPath("uploadfile"); // 上传单个文件 // Servlet3.0将multipart/form-data的POST请求封装成Part,通过Part对上传的文件进行操作。 Part part = request.getPart("file");// 通过表单file控件(<input type="file" name="file">)的名字直接获取Part对象 // Servlet3没有提供直接获取文件名的方法,需要从请求头中解析出来 // 获取请求头,请求头的格式:form-data; name="file"; filename="demo.zip" String header = part.getHeader("content-disposition"); // 获取文件名 String fileName = getFileName(header); String filePath = savePath + File.separator + fileName; String newFileName = File.separator+System.currentTimeMillis()+".zip";//写成zip后缀,能够在window环境,浏览器下直接下载 String resultFielPath=savePath+newFileName; String downloadpath="uploadfile"+newFileName; // 把文件写到指定路径 part.write(filePath); List<String> strlist = FileUtil.readFile(filePath); if(strlist!=null && imeilist.size()>0){ for (int i = 0; i < strlist.size(); i++) { //文件写入 FileUtil.writeFile(strlist.get(i)+"\t"+result+"\n", resultFielPath); } } request.setAttribute("downloadpath",downloadpath); //文件下载路径 request.setAttribute("message", "上传解析成功"); request.setAttribute("status", status); request.getRequestDispatcher("index.jsp").forward(request,response); } /** * 根据请求头解析出文件名 * @param header 请求头 * @return 文件名 */ public String getFileName(String header) { String[] tempArr1 = header.split(";"); String[] tempArr2 = tempArr1[2].split("="); // 获取文件名,兼容各种浏览器 String fileName = tempArr2[1].substring(tempArr2[1].lastIndexOf("\\") + 1).replaceAll("\"", ""); return fileName; } }