jQuery實現非同步上傳一個或多個檔案
阿新 • • 發佈:2020-08-18
本文例項為大家分享了jQuery實現非同步上傳一個或多個檔案的具體程式碼,供大家參考,具體內容如下
首先使用SpringMvc檔案上傳,需要引入第三方上傳檔案的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>
響應json需要匯入的包:
<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>
接下來看jsp檔案:
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>首頁</title> </head> <body> <p>同步上傳一個檔案</p> <form action="upload/testUpload" method="post" enctype="multipart/form-data"> <input type="file" name="upload"><br> <input type="submit" value="上傳"> </form> <hr> <p>非同步上傳一個檔案</p> <form id="formData" method="post" enctype="multipart/form-data"> <input type="file" name="upload"><br> <input id="sub" type="button" value="上傳"> </form> <hr> <p>非同步上傳一個檔案,且表單有其他資料</p> <form id="formData2" method="post" enctype="multipart/form-data"> 編 號:<input type="text" name="id"><br> 賬戶名:<input type="text" name="name"><br> 金 額:<input type="text" name="money"><br> <input type="file" name="upload"><br> <input id="sub2" type="button" value="上傳"> </form> <hr> <p>非同步上傳多個檔案,且表單有其他資料</p> <form id="formData3" method="post" enctype="multipart/form-data"> 編 號:<input type="text" name="id"><br> 賬戶名:<input type="text" name="name"><br> 金 額:<input type="text" name="money"><br> <input type="file" name="upload" multiple="multiple"><br> <input id="sub3" type="button" value="上傳"> </form> <script type="text/javascript" src="js/jquery-3.3.1.js"></script> <script> $(function () { //非同步上傳一個檔案 $("#sub").click(function () { var file = new FormData($("#formData")[0]); $.post({ url:'upload/testUpload',contentType:false,//jQuery不要去設定Content-Type請求頭 processData:false,//jQuery不要去處理髮送的資料 cache:false,//不快取 dataType:'json',//返回型別json data:file,//檔案資料 success:function (res) { console.log(res); } }); }); //非同步上傳一個檔案,帶表單引數 $("#sub2").click(function () { //將form表單轉換為FormData物件 var data = new FormData(document.querySelector("#formData2")); $.post({ url:'upload/testUpload2',//返回型別json data:data,//表單資料 success:function (res) { console.log(res); },error:function (error) { console.log(error); } }); }); //非同步上傳多個檔案,帶表單引數 $("#sub3").click(function () { //將form表單轉換為FormData物件 var data = new FormData(document.querySelector("#formData3")); $.post({ url:'upload/testUpload3',error:function (error) { console.log(error); } }); }); }); </script> </body> </html>
下面是controller:
@Controller @RequestMapping("/upload") public class FileController { /** * 同步檔案一個上傳和非同步上傳一個檔案,共同使用這一個控制器方法 * @param request * @param upload * @return * @throws IOException */ @RequestMapping(value = "/testUpload",method = RequestMethod.POST) public String upload(HttpServletRequest request,MultipartFile upload) throws IOException { //獲取檔案的儲存路徑 String path = request.getServletContext().getRealPath("/uploads"); //獲取上傳檔案的名稱 String filename = upload.getOriginalFilename(); //獲取隨機字串 String prefix = UUID.randomUUID().toString().replaceAll("-",""); filename = prefix + "_" + filename; //建立檔案物件 File file = new File(path); //判斷路徑是否存在,不存在則建立 if(!file.exists()){ file.mkdir(); } //上傳檔案 upload.transferTo(new File(file,filename)); return "success"; } /** * 非同步檔案上傳和表單資料 * @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 { //獲取檔案的儲存路徑 String path = request.getServletContext().getRealPath("/uploads"); //獲取上傳檔案的名稱 String filename = upload.getOriginalFilename(); //獲取隨機字串 String prefix = UUID.randomUUID().toString().replaceAll("-",filename)); return account; } /** * 非同步多個檔案上傳和表單資料 * @param request * @param upload 採用陣列接收 * @return * @throws IOException */ @RequestMapping(value = "/testUpload3",method = RequestMethod.POST) public @ResponseBody Account upload3(HttpServletRequest request,MultipartFile[] upload,Account account) throws IOException { //獲取檔案的儲存路徑 String path = request.getServletContext().getRealPath("/uploads"); //建立檔案物件 File file = new File(path); //判斷路徑是否存在,不存在則建立 if(!file.exists()){ file.mkdir(); } for (MultipartFile multipartFile : upload) { //獲取上傳檔案的名稱 String filename = multipartFile.getOriginalFilename(); //獲取隨機字串 String prefix = UUID.randomUUID().toString().replaceAll("-",""); filename = prefix + "_" + filename; //上傳檔案 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.... }
注意事項:
上傳檔案時,表單的 enctype 修改為:multipart/form-data;
後端使用 MultipartFile upload 物件接收,upload 必須和 <input> 的name屬性一致;
上傳多個檔案,給 <input> 新增:multiple=“multiple”
效果:
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支援我們。