客戶端發送文件：

/**

* 文件上傳

* @param remote_url 請求地址

* @param file 請求文件

* @return 響應結果

*/

public String httpClientUploadFile(String remote_url,File file) {

CloseableHttpClient httpClient = HttpClients.createDefault();

String result = "";

try {

String fileName = file.getName();

HttpPost httpPost = new HttpPost(remote_url);

MultipartEntityBuilder builder = MultipartEntityBuilder.create();

//binFile參數-服務端通過此參數獲取文件

builder.addBinaryBody("binFile", new FileInputStream(file), ContentType.MULTIPART_FORM_DATA, fileName);// 文件流

//filename-文件名參數

builder.addTextBody("filename", fileName);

HttpEntity entity = builder.build();

httpPost.setEntity(entity);

HttpResponse response = httpClient.execute(httpPost);// 執行提交

HttpEntity responseEntity = response.getEntity();

if (responseEntity != null) {

// 將響應內容轉換為字符串

result = EntityUtils.toString(responseEntity, Charset.forName("UTF-8"));

}

} catch (IOException e) {

e.printStackTrace();

} catch (Exception e) {

e.printStackTrace();

} finally {

try {

httpClient.close();

} catch (IOException e) {

e.printStackTrace();

}

}

return result;

}

服務端接收文件：

@RequestMapping(value = "downloadMinimumRateFile",method =RequestMethod.POST)public ResponseEntityminimumRateFileDownload(HttpServletRequest request){

ServletContext context=request.getSession().getServletContext();//將當前上下文初始化給 CommonsMultipartResolver (多部分解析器)

CommonsMultipartResolver resolver = newCommonsMultipartResolver(context);//判斷是否多文件上傳

if(resolver.isMultipart(request)) {

MultipartHttpServletRequest multRequest=(MultipartHttpServletRequest) request;

MultipartFile rcvFile= multRequest.getFile("binFile");

//具體的業務邏輯處理

//...

//...

}

}

總結

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