CloseableHttpClient 和 MultipartFile 配合上傳檔案
1 後臺
(1)java
@RequestMapping(value = "/showapi", method = RequestMethod.POST) public ResponseEntity showapi(@RequestParam("file") MultipartFile multipartFile) { byte[] byteImg = multipartFile.getBytes();
}
普通的介面,只不過接收引數型別為MultipartFile
(2)spring配置
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="maxUploadSize" value="100000" /> <property name="maxInMemorySize" value="100000" /> </bean>
dispatcherServlet是沒有處理multipart/form-data,需要單獨配置一個resolver,id="multipartResolver"預設如此設定(3)maven依賴
<dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.2.1</version> <!-- makesure correct version here --> </dependency>
2 客戶端
public static String decaptcha(File file) { CloseableHttpClient client = HttpClients.createDefault(); HttpPost post = new HttpPost(ReadProperties.read("captcha.url")); RequestConfig config = RequestConfig.custom().setSocketTimeout(30000).setConnectTimeout(20000).build(); post.setConfig(config);
FileBody fileBody = new FileBody(file, ContentType.DEFAULT_BINARY); MultipartEntityBuilder builder = MultipartEntityBuilder.create(); builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);builder.addPart("file", fileBody);
// 相當於 <input type="file" class="file" name="file">,匹配@RequestParam("file") // .addPart()可以設定模擬瀏覽器<input/>的表單提交
HttpEntity entity = builder.build(); post.setEntity(entity); String result = ""; try { CloseableHttpResponse e = client.execute(post); HttpEntity resEntity = e.getEntity(); if(entity != null) { result = EntityUtils.toString(resEntity); System.out.println("response content:" + result); } } catch (IOException var10) { logger.error("請求解析驗證碼io異常",var10); var10.printStackTrace(); } return result; }
附錄(瀏覽器請求資料格式):
------WebKitFormBoundaryqgkaBn8IHJCuNmiW
Content-Disposition: form-data; name="firstName"Charles
------WebKitFormBoundaryqgkaBn8IHJCuNmiW
Content-Disposition: form-data; name="lastName"Xavier
------WebKitFormBoundaryqgkaBn8IHJCuNmiW
Content-Disposition: form-data; name="email"[email protected]
------WebKitFormBoundaryqgkaBn8IHJCuNmiW
Content-Disposition: form-data; name="username"professorx
------WebKitFormBoundaryqgkaBn8IHJCuNmiW
Content-Disposition: form-data; name="password"letmein01
------WebKitFormBoundaryqgkaBn8IHJCuNmiW
Content-Disposition: form-data; name="profilePicture"; filename="me.jpg"Content-Type: image/jpeg
[[ Binary image data goes here ]]
------WebKitFormBoundaryqgkaBn8IHJCuNmiW--
這些name就是對映到@RequestParam(name)