HttpClient调用接口传递文件参数

方法一：使用 org.apache.commons.httpclient;的HttpClient

• 具体代码:

public Map<String, Object> officialOcrUpload(String filePath) {        Map<String, Object> reContent = new HashMap<>();        String soapResponseInfo = "";        File targeFile = new File(filePath);        HttpClient httpClient = new HttpClient();        PostMethod postMethod = new PostMethod(OFFICIAL_ENDPOINT+"?bizType=tm");        int state = 500;        try {            FilePart filePart = new FilePart(targeFile.getName(), targeFile);            filePart.setContentType("multipart/form-data");            filePart.setName("file");            Part[] parts = {filePart};            postMethod.setRequestEntity(new MultipartRequestEntity(parts, postMethod.getParams()));            httpClient.getHttpConnectionManager().getParams().setConnectionTimeout(Integer.valueOf(OFFICIAL_TIMEOUT));//设置连接超时            state = httpClient.executeMethod(postMethod);            if (state == HttpStatus.SC_OK) {                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(postMethod.getResponseBodyAsStream(), "utf-8"));                String responseLine = "";                while((responseLine = bufferedReader.readLine()) != null){                    soapResponseInfo += responseLine;                }            }        } catch (FileNotFoundException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (HttpException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } finally {            reContent.put("status", state);            reContent.put("body", soapResponseInfo);            postMethod.releaseConnection();            if (state == HttpStatus.SC_OK) {                reContent = queryOfficalDoc(soapResponseInfo);            }        }        return reContent;    }

方法二：使用org.apache.http.impl.client;的HttpClient

• maven中引用的jar包

<dependency>          <groupId>org.apache.httpcomponents</groupId>          <artifactId>httpmime</artifactId>          <version>4.3</version>        </dependency><dependency>          <groupId>org.apache.httpcomponents</groupId>          <artifactId>httpcore</artifactId>          <version>4.4.6</version>        </dependency>

• 具体代码

public String officialFileUpload(String filepath){        CloseableHttpClient httpClient = HttpClients.createDefault();        HttpPost httpPost = new HttpPost(OFFICIAL_ENDPOINT+"?bizType=tm");        String result = "";        try {            FileBody bin = new FileBody(new File(filepath));            MultipartEntityBuilder reqEntity = MultipartEntityBuilder.create();            reqEntity.addPart("file", bin);            HttpEntity httpEntity = reqEntity.build();            httpPost.setEntity(httpEntity);            HttpResponse response = httpClient.execute(httpPost);            HttpEntity responseEntity = response.getEntity();            if (responseEntity != null) {                result = EntityUtils.toString(responseEntity, Charset.forName("UTF-8"));            }        } catch (ClientProtocolException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } finally {            httpPost.releaseConnection();        }        return result;    }

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