本文实例为大家分享了jQuery实现异步上传一个或多个文件的具体代码，供大家参考，具体内容如下
首先使用SpringMvc文件上传，需要引入第三方上传文件的jar：
<dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version> </dependency>
响应json需要导入的包：
<dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.9.0</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.9.0</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> <version>2.9.0</version> </dependency>
接下来看jsp文件：
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>首页</title> </head> <body> <p>同步上传一个文件</p> <form action="upload/testUpload" method="post" enctype="multipart/form-data"> <input type="file" name="upload"><br> <input type="submit" value="上传"> </form> <hr> <p>异步上传一个文件</p> <form id="formData" method="post" enctype="multipart/form-data"> <input type="file" name="upload"><br> <input id="sub" type="button" value="上传"> </form> <hr> <p>异步上传一个文件,且表单有其他数据</p> <form id="formData2" method="post" enctype="multipart/form-data"> 编 号:<input type="text" name="id"><br> 账户名:<input type="text" name="name"><br> 金 额:<input type="text" name="money"><br> <input type="file" name="upload"><br> <input id="sub2" type="button" value="上传"> </form> <hr> <p>异步上传多个文件,且表单有其他数据</p> <form id="formData3" method="post" enctype="multipart/form-data"> 编 号:<input type="text" name="id"><br> 账户名:<input type="text" name="name"><br> 金 额:<input type="text" name="money"><br> <input type="file" name="upload" multiple="multiple"><br> <input id="sub3" type="button" value="上传"> </form> <script type="text/javascript" src="/UploadFiles/2021-04-02/jquery-3.3.1.js">下面是controller：
@Controller @RequestMapping("/upload") public class FileController { /** * 同步文件一个上传和异步上传一个文件，共同使用这一个控制器方法 * @param request * @param upload * @return * @throws IOException */ @RequestMapping(value = "/testUpload",method = RequestMethod.POST) public String upload(HttpServletRequest request, MultipartFile upload) throws IOException { //获取文件的保存路径 String path = request.getServletContext().getRealPath("/uploads"); //获取上传文件的名称 String filename = upload.getOriginalFilename(); //获取随机字符串 String prefix = UUID.randomUUID().toString().replaceAll("-", ""); filename = prefix + "_" + filename; //创建文件对象 File file = new File(path); //判断路径是否存在，不存在则创建 if(!file.exists()){ file.mkdir(); } //上传文件 upload.transferTo(new File(file,filename)); return "success"; } /** * 异步文件上传和表单数据 * @param request * @param upload * @return * @throws IOException */ @RequestMapping(value = "/testUpload2",method = RequestMethod.POST) public @ResponseBody Account upload2(HttpServletRequest request, MultipartFile upload, Account account) throws IOException { //获取文件的保存路径 String path = request.getServletContext().getRealPath("/uploads"); //获取上传文件的名称 String filename = upload.getOriginalFilename(); //获取随机字符串 String prefix = UUID.randomUUID().toString().replaceAll("-", ""); filename = prefix + "_" + filename; //创建文件对象 File file = new File(path); //判断路径是否存在，不存在则创建 if(!file.exists()){ file.mkdir(); } //上传文件 upload.transferTo(new File(file,filename)); return account; } /** * 异步多个文件上传和表单数据 * @param request * @param upload 采用数组接收 * @return * @throws IOException */ @RequestMapping(value = "/testUpload3",method = RequestMethod.POST) public @ResponseBody Account upload3(HttpServletRequest request, MultipartFile[] upload, Account account) throws IOException { //获取文件的保存路径 String path = request.getServletContext().getRealPath("/uploads"); //创建文件对象 File file = new File(path); //判断路径是否存在，不存在则创建 if(!file.exists()){ file.mkdir(); } for (MultipartFile multipartFile : upload) { //获取上传文件的名称 String filename = multipartFile.getOriginalFilename(); //获取随机字符串 String prefix = UUID.randomUUID().toString().replaceAll("-", ""); filename = prefix + "_" + filename; //上传文件 multipartFile.transferTo(new File(file,filename)); } return account; } }public class Account implements Serializable { private int id; private String name; private float money; //getter or setter.... }注意事项：
上传文件时，表单的 enctype 修改为：multipart/form-data；
后端使用 MultipartFile upload 对象接收，upload 必须和 <input> 的name属性一致；
上传多个文件，给 <input> 添加：multiple=“multiple”
效果：
更多精彩内容请参考专题《ajax上传技术汇总》，《javascript文件上传操作汇总》和《jQuery上传操作汇总》进行学习。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
