post请求 http

public static String postParams(String url, Map<String, String> params, List<File> listFile) {
    
    
        // 获取连接客户端工具
        CloseableHttpClient httpClient = HttpClients.createDefault();
        CloseableHttpResponse response = null;
        try {
    
    
            // 创建POST请求对象
            HttpPost httpPost = new HttpPost(url);
            // 设置参数
            MultipartEntityBuilder multipartEntityBuilder = MultipartEntityBuilder.create();
            for (Iterator iter = params.keySet().iterator(); iter.hasNext(); ) {
    
    
                String name = (String) iter.next();
                String value = String.valueOf(params.get(name));
                multipartEntityBuilder.addTextBody(name, value, ContentType.TEXT_PLAIN.withCharset("UTF-8"));
            }
            for (File file : listFile) {
    
    
                multipartEntityBuilder.addPart("fileStream", new FileBody(file));
            }
            HttpEntity sentity = multipartEntityBuilder.build();
            httpPost.setEntity(sentity);
            
            response = httpClient.execute(httpPost);
            // 获得响应的实体对象
            HttpEntity entity = response.getEntity();
            // 使用Apache提供的工具类进行转换成字符串
            String entityStr = EntityUtils.toString(entity, "UTF-8");
            httpPost.releaseConnection();
            return entityStr;
        } catch (ClientProtocolException e) {
    
    
            e.printStackTrace();
        } catch (ParseException e) {
    
    
            e.printStackTrace();
        } catch (IOException e) {
    
    
            e.printStackTrace();
        } finally {
    
    
            // 释放连接
            if (null != response) {
    
    
                try {
    
    
                    response.close();
                    httpClient.close();
                } catch (IOException e) {
    
    
                    e.printStackTrace();
                }
            }
        }
        return null;
    }