ajax实现文件上传，多文件上传，追加参数

时间：2023-03-09 18:26:45
ajax实现文件上传，多文件上传，追加参数

1.html部分实现代码:

<!DOCTYPE html>

<html>

<head>

<meta charset="UTF-8">

<title>文件上传</title>

</head>

<body>

<form id= "uploadForm">

      <p >指定文件名： <input type="text" name="filename" value= ""/></p >

      <p >上传文件： <input type="file" name="file1" id="file1"  multiple="multiple"  /></p>

      <p >上传文件： <input type="file" name="file2" id="file2" /></p>

      <p >上传文件： <input type="file" name="file3" id="file3" /></p>

      <input type="button" value="上传" onclick="doUpload()" />

</form>

<script type="text/javascript" src="lib/jquery/1.9.1/jquery.min.js"></script>

<script type="text/javascript" src="lib/layer/2.4/layer.js"></script>

<script type="text/javascript" src="js/common.js"></script>

<script type="text/javascript">

//获取token

var token = parent.window.document.getElementById("token").value;    

function doUpload() {

    var formData = new FormData();

    formData.append("token", token);

    formData.append("file1", $('#file1')[0].files[0]);

    formData.append("file2", $('#file2')[0].files[0]);

    formData.append("file3", $('#file3')[0].files[0]);

    $.ajax({

         url: 'bookController/uploadMult' ,

         type: 'post',

         data: formData,

         cache: false,

         processData: false,

         contentType: false,

         async: false

    }).done(function(res) {

    }).fail(function(res) {

    });

}

</script>

</body>

</html>

2.后台部分:

多文件上传方式处理:

    @RequestMapping(value = "/uploadMult", method = RequestMethod.POST)

    @ResponseBody

    public String uploadMult(HttpServletRequest request) {

         // 转型为MultipartHttpRequest：

        MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;

        // 获得文件：

        List<MultipartFile> files = multipartRequest.getFiles("file1");

        List<MultipartFile> files2 = multipartRequest.getFiles("file2");

        List<MultipartFile> files3 = multipartRequest.getFiles("file3");

        if (files.isEmpty()) {

            return "false";

        }

        String path = "F:/test";

        for (MultipartFile file : files) {

            String fileName = file.getOriginalFilename();

            int size = (int) file.getSize();

            System.out.println(fileName + "-->" + size);

            if (file.isEmpty()) {

                return "false";

            } else {

                File dest = new File(path + "/" + fileName);

                if (!dest.getParentFile().exists()) { // 判断文件父目录是否存在

                    dest.getParentFile().mkdir();

                }

                try {

                    file.transferTo(dest);

                } catch (Exception e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                    return "false";

                }

            }

        }

        return "true";

    }

单个文件上传方式处理:

    @RequestMapping(value = "/upload", method = RequestMethod.POST)

    @ResponseBody

    public String upload(@RequestParam("file") MultipartFile file, HttpServletRequest request) {

        String contentType = file.getContentType();

        String fileName = file.getOriginalFilename();

        /*

         * System.out.println("fileName-->" + fileName);

         * System.out.println("getContentType-->" + contentType);

         */

        String filePath = request.getSession().getServletContext().getRealPath("upload/");

        try {

            uploadFile(file.getBytes(), filePath, fileName);

        } catch (Exception e) {

            // TODO: handle exception

        }

        // 返回json

        System.out.println("上传成功!");

        return "true";

    }

    public static void uploadFile(byte[] file, String filePath, String fileName) throws Exception {

        File targetFile = new File(filePath);

        if (!targetFile.exists()) {

            targetFile.mkdirs();

        }

        FileOutputStream out = new FileOutputStream(filePath + fileName);

        out.write(file);

        out.flush();

        out.close();

    }

springboot文件上传参数配置：在application.properties文件中配置上传大小限制：

#文件上传

#Spring Boot 1.3.x或者之前

multipart.maxFileSize=800Kb

multipart.maxRequestSize=1000Mb

#Spring Boot 1.4.x或者之后

spring.http.multipart.maxFileSize=100Mb

spring.http.multipart.maxRequestSize=1000Mb

#maxFileSize 是单个文件大小

#maxRequestSize是设置总上传的数据大小

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