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jQuery实现异步上传一个或多个文件

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&emsp;号:<input type="text" name="id"><br>
 账户名:<input type="text" name="name"><br>
 金&emsp;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&emsp;号:<input type="text" name="id"><br>
 账户名:<input type="text" name="name"><br>
 金&emsp;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:

jQuery实现异步上传一个或多个文件

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。