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<dependency>

    <groupId>org.apache.httpcomponents</groupId>

    <artifactId>httpclient</artifactId>

    <version>4.5.3</version>

</dependency>

<dependency>

    <groupId>org.apache.httpcomponents</groupId>

    <artifactId>httpmime</artifactId>

    <version>4.5.3</version>

</dependency>

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public static void upload2() throws ClientProtocolException, IOException{

    CloseableHttpClient httpClient = HttpClientBuilder.create().build();

    CloseableHttpResponse httpResponse = null;

    RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(200000).setSocketTimeout(200000000).build();

    HttpPost httpPost = new HttpPost("http://localhost:8080/WEY.WebApp/auth/right/right/receiveFile.html");

    httpPost.setConfig(requestConfig);

    MultipartEntityBuilder multipartEntityBuilder = MultipartEntityBuilder.create();

    //multipartEntityBuilder.setCharset(Charset.forName("UTF-8"));

    //File file = new File("F:\\Ken\\1.PNG");

    //FileBody bin = new FileBody(file); 

    File file = new File("F:\\Ken\\abc.pdf");

    //multipartEntityBuilder.addBinaryBody("file", file,ContentType.create("image/png"),"abc.pdf");

    //当设置了setSocketTimeout参数后，以下代码上传PDF不能成功，将setSocketTimeout参数去掉后此可以上传成功。上传图片则没有个限制

    //multipartEntityBuilder.addBinaryBody("file",file,ContentType.create("application/octet-stream"),"abd.pdf");

    multipartEntityBuilder.addBinaryBody("file",file);

    //multipartEntityBuilder.addPart("comment", new StringBody("This is comment", ContentType.TEXT_PLAIN));

    multipartEntityBuilder.addTextBody("comment", "this is comment");

    HttpEntity httpEntity = multipartEntityBuilder.build();

    httpPost.setEntity(httpEntity);

    httpResponse = httpClient.execute(httpPost);

    HttpEntity responseEntity = httpResponse.getEntity();

    int statusCode= httpResponse.getStatusLine().getStatusCode();

    if(statusCode == 200){

        BufferedReader reader = new BufferedReader(new InputStreamReader(responseEntity.getContent()));

        StringBuffer buffer = new StringBuffer();

        String str = "";

        while(!StringUtil.isRealEmpty(str = reader.readLine())) {

            buffer.append(str);

        }

        System.out.println(buffer.toString());

    }

    httpClient.close();

    if(httpResponse!=null){

        httpResponse.close();

    }

}

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public static void upload() { 

       CloseableHttpClient httpclient = HttpClients.createDefault(); 

       //CloseableHttpClient httpclient = HttpClientBuilder.create().build();

       try { 

           HttpPost httppost = new HttpPost("http://localhost:8080/WEY.WebApp/auth/right/right/receiveFile.html"); 

           RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(200000).setSocketTimeout(200000).build();

           httppost.setConfig(requestConfig);

           FileBody bin = new FileBody(new File("F:\\Ken\\abc.pdf")); 

           StringBody comment = new StringBody("This is comment", ContentType.TEXT_PLAIN); 

           HttpEntity reqEntity = MultipartEntityBuilder.create().addPart("file", bin).addPart("comment", comment).build(); 

           httppost.setEntity(reqEntity); 

           System.out.println("executing request " + httppost.getRequestLine()); 

           CloseableHttpResponse response = httpclient.execute(httppost); 

           try { 

               System.out.println(response.getStatusLine()); 

               HttpEntity resEntity = response.getEntity(); 

               if (resEntity != null) { 

                   String responseEntityStr = EntityUtils.toString(response.getEntity());

                   System.out.println(responseEntityStr);

                   System.out.println("Response content length: " + resEntity.getContentLength()); 

               } 

               EntityUtils.consume(resEntity); 

           } finally { 

               response.close(); 

           } 

       } catch (ClientProtocolException e) { 

           e.printStackTrace(); 

       } catch (IOException e) { 

           e.printStackTrace(); 

       } finally { 

           try { 

               httpclient.close(); 

           } catch (IOException e) { 

               e.printStackTrace(); 

           } 

       } 

   }

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public String post() throws ClientProtocolException, IOException{

    CloseableHttpClient httpClient = HttpClientBuilder.create().build();

    CloseableHttpResponse httpResponse = null;

    HttpPost httpPost = new HttpPost("http://localhost:8080/WEY.WebApp/auth/right/right/receivePost.html");

    RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(20000).setSocketTimeout(22000).build();

    httpPost.setConfig(requestConfig);

    List<NameValuePair> params = new ArrayList<NameValuePair>();

    params.add(new BasicNameValuePair("user.loginId", "Lin"));

    params.add(new BasicNameValuePair("user.employeeName","令狐冲"));

    UrlEncodedFormEntity entity = new UrlEncodedFormEntity(params,Charset.forName("UTF-8"));

    httpPost.setEntity(entity);

    httpResponse = httpClient.execute(httpPost);

    HttpEntity responseEntity = httpResponse.getEntity();

    if(responseEntity!=null){

        String content = EntityUtils.toString(responseEntity,"UTF-8");

        System.out.println(content);

    }

    if(httpResponse!=null){

        httpResponse.close();

    }

    if(httpClient!=null){

        httpClient.close();

    }

    return null;

}