java後臺開發免費的物件儲存Bmob
阿新 • • 發佈：2018-12-14
對於很多開發者來說，特別是學生黨來說，找一個不要錢的物件儲存再好不過了，下面給大家推薦bmob給大家，官方網站https://www.bmob.cn/，他提供儲存少量是免費的，對於開發者來說足夠了
一、首先是匯入
<dependencies> <dependency> <groupId>com.github.bmob</groupId> <artifactId>javasdk</artifactId> <version>1.0.1-rc1</version> </dependency> <dependency> <groupId>com.squareup.retrofit2</groupId> <artifactId>retrofit</artifactId> <version>2.5.0</version> </dependency> <dependency> <groupId>com.squareup.retrofit2</groupId> <artifactId>converter-gson</artifactId> <version>2.5.0</version> </dependency> <dependency> <groupId>com.squareup.retrofit2</groupId> <artifactId>adapter-rxjava</artifactId> <version>2.5.0</version> </dependency> <dependency> <groupId>com.squareup.okhttp3</groupId> <artifactId>logging-interceptor</artifactId> <version>3.12.0</version> </dependency> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency> </dependencies>
二、後臺程式碼
@RequestMapping(value = "/doUpload", method = RequestMethod.POST) public void doUploadFile(@RequestParam("file") MultipartFile file) { File f = null; if (file.equals("") || file.getSize() <= 0) { file = null; } else { InputStream ins = null; try { ins = file.getInputStream(); } catch (IOException e) { e.printStackTrace(); } f = new File(file.getOriginalFilename()); inputStreamToFile(ins, f); } uploadFile(f); } /** * MultipartFile轉file * @param ins InputStream * @param file File */ private void inputStreamToFile(InputStream ins, File file) { try { OutputStream os = new FileOutputStream(file); int bytesRead = 0; byte[] buffer = new byte[8192]; while ((bytesRead = ins.read(buffer, 0, 8192)) != -1) { os.write(buffer, 0, bytesRead); } os.close(); ins.close(); } catch (Exception e) { e.printStackTrace(); } } /** * 上傳圖片返回URL * @param file File */ private static void uploadFile(File file) { Bmob.getInstance().init("id", "key");//bmob上申請的 final BmobFile bmobFile = new BmobFile(file); bmobFile.uploadFile(new UploadListener() { @Override public void onSuccess() { System.out.println(bmobFile.getCdnName() + "-" + bmobFile.getFilename() + "-" + bmobFile.getUrl()); } @Override public void onFailure(BmobException ex) { System.err.println(ex.getMessage()); } }); }
三，前端程式碼
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>$Title$</title> </head> <body> <form method="post" action="/doUpload" enctype="multipart/form-data"> <input type="file" name="file"/> <button type="submit" >提交</button> </form> </body> </html>
四、總結
這樣就完成了圖片上傳，然後bmob那邊返回圖片URL，開發者就可以對URL做出相應的處理了，是不是很簡單啊