使用smartupload.jar实现文件上传

1.将jar包添加到项目中:smartupload.jar

2.准备上传的页面

  1. <%--
  2.   Created by IntelliJ IDEA.
  3.   User: Administrator
  4.   To change this template use File | Settings | File Templates.
  5. --%>
  6. <%@ page contentType="text/html;charset=UTF-8" language="java" %>
  7. <html>
  8.   <head>
  9.     <title>$Title$</title>
  10.   </head>
  11.   <body>
  12.      <form action="/upload" method="post" enctype="multipart/form-data">
  13.        名称:<input type="text" name="uname" ><br>
  14.        文件:<input type="file" name="myfile"><br>
  15.         <input type="submit" value="上传">
  16.      </form>
  17.   </body>
  18. </html>

注:
(1)form标签中要添加enctype属性
(2)提交方式必须是post
(3).开始获取数据,保存文件

  1. package com.yhp.web;
  3. import com.jspsmart.upload.File;
  4. import com.jspsmart.upload.SmartUpload;
  5. import com.jspsmart.upload.SmartUploadException;
  7. import javax.servlet.ServletException;
  8. import javax.servlet.annotation.WebServlet;
  9. import javax.servlet.http.HttpServlet;
  10. import javax.servlet.http.HttpServletRequest;
  11. import javax.servlet.http.HttpServletResponse;
  12. import javax.servlet.jsp.JspFactory;
  13. import javax.servlet.jsp.PageContext;
  14. import java.io.IOException;
  16. /**
  17.  * Administrator
  18.  * uploadProject
  19.  * 面向对象面向君  不负代码不负卿
  20.  */
  21. @WebServlet(value = "/upload")
  22. public class UploadServlet extends HttpServlet {
  23.     @Override
  24.     protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
  25.           //1.创建对象
  26.         SmartUpload smartUpload = new SmartUpload();
  27.         //2.初始化
  28.         PageContext pageContext = JspFactory.getDefaultFactory().getPageContext(this, req, resp, null, false, 1024 * 5, true);
  29.         smartUpload.initialize(pageContext);
  30.         //3.设置编码方式
  31.         smartUpload.setCharset("utf-8");
  32.         //4.上传
  33.         try {
  34.             smartUpload.upload();
  35.         } catch (SmartUploadException e) {
  36.             e.printStackTrace();
  37.         }
  38.         //5.保存文件
  39.         File file = smartUpload.getFiles().getFile(0);
  40.         //6.得到文件的基本信息
  41.         String fileName = file.getFileName();
  42.         //指定服务器保存文件的路径
  43.         String url="uploadfile/"+fileName;
  44.         //保存文件
  45.         try {
  46.             file.saveAs(url,File.SAVEAS_VIRTUAL);
  47.         } catch (SmartUploadException e) {
  48.             e.printStackTrace();
  49.         }
  50.         //是否保存成功?--->如果上传成功，则页面中显示该文件
  51.         req.setAttribute("filename",fileName);
  52.         //7.测试:除文件以外的内容如何获取
  53.         String uname = smartUpload.getRequest().getParameter("uname");
  54.         System.out.println("uname="+uname);
  55.         //8.跳转页面
  56.         req.getRequestDispatcher("/success.jsp").forward(req,resp);
  57.     }
  58. }

注：
(1)此时如果表单中有其他数据时，不能通过request直接获取，需要通过SmartUpload对象获取
String name=su.getRequest().getParameter(“uname”);
并且该代码要在SmartUpload操作完成后添加
(2)解决乱码:
new String(name.getBytes(“GBK”),”utf-8”)
注:斜杠方向:/
注意:
image.png
image.png

smartupload常用方法

image.png