SpringMVC多个文件上传及上传后立即显示图片功能

2024-07-13 10:12:51

字体：大中小

来源：转载

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多文件上传就是改良一个方法把MultipartFile类换成CommonsMultipartFile类，因为上传多个文件用数组方式的话MultipartFile类不能初始化，它不支持数组

package com.meng.upload;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import javax.servlet.http.HttpServletRequest;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.multipart.MultipartFile;import org.springframework.web.multipart.commons.CommonsMultipartFile;@Controllerpublic class upload {  @RequestMapping(value="/upload",method=RequestMethod.POST)  public String upload(@RequestParam("file1") CommonsMultipartFile[] file1, HttpServletRequest request) {    for (CommonsMultipartFile commonsMultipartFile : file1) {      try {        File file = new File(request.getServletContext().getRealPath("upload"),            System.currentTimeMillis() + "_"                + commonsMultipartFile.getOriginalFilename());        System.out.println(file.getPath()+"");        FileOutputStream fileOutputStream = new FileOutputStream(file);        fileOutputStream.write(commonsMultipartFile.getBytes());        fileOutputStream.close();      } catch (Exception e) {        // TODO Auto-generated catch block        e.printStackTrace();      }    }    return "ok";  }}

index.jsp页面上传立即显示图片

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><html> <head>  <title>My JSP 'index.jsp' starting page</title>  <script type="text/javascript">  //判断浏览器是否支持FileReader接口  if (typeof FileReader == 'undefined') {    alert("<h1>当前浏览器不支持FileReader接口</h1>");  }   //选择图片，马上预览  function xmTanUploadImg(obj) {    var file = obj.files[0];    var reader = new FileReader();    reader.onload = function(e) {      var img = document.getElementById("img1");      img.src = e.target.result;    }    reader.readAsDataURL(file);  }  </script> </head> <body>  <form action="upload.upload" method="post" enctype="multipart/form-data">    file1::<input type="file" name="file1" accept=".jpg,.png" onchange="xmTanUploadImg(this)" />    <input type="submit" />    <img id="img1" />  </form> </body></html>

总结

以上所述是小编给大家介绍的SpringMVC多个文件上传及上传后立即显示图片功能，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对VeVb武林网网站的支持！

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