POST和GET请求

public static String doPost(String url){
        //创建httpClient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        CloseableHttpResponse response = null;
        String result = "";
        try{
            //创建http请求
            HttpPost httpPost = new HttpPost(url);
            httpPost.addHeader("Content-Type", "application/json");
            //创建请求内容
            String jsonStr = "{\"qry_by\":\"name\", \"name\":\"Tim\"}";
            StringEntity entity = new StringEntity(jsonStr);
            httpPost.setEntity(entity);
            response = httpClient.execute(httpPost);
            result = EntityUtils.toString(response.getEntity(),"utf-8");
            System.out.println(result);
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            //关闭资源
            if(response != null){
                try {
                    response.close();
                }catch (IOException ioe){
                    ioe.printStackTrace();
                }
            }
            if(httpClient != null){
                try{
                    httpClient.close();
                }catch (IOException ioe){
                    ioe.printStackTrace();
                }
            }
        }
        return result;
    }

 

public static String doGet(String url){
        CloseableHttpClient httpClient = null;
        CloseableHttpResponse response = null;
        String result = "";
        try{
            //通过默认配置创建一个httpClient实例
            httpClient = HttpClients.createDefault();
            //创建httpGet远程连接实例
            HttpGet httpGet = new HttpGet(url);
            //httpGet.addHeader("Connection", "keep-alive");
            //设置请求头信息
            httpGet.addHeader("Accept", "application/json");
            //配置请求参数
            RequestConfig requestConfig = RequestConfig.custom()
                    .setConnectTimeout(35000) //设置连接主机服务超时时间
                    .setConnectionRequestTimeout(35000)//设置请求超时时间
                    .setSocketTimeout(60000)//设置数据读取超时时间
                    .build();
            //为httpGet实例设置配置
            httpGet.setConfig(requestConfig);
            //执行get请求得到返回对象
            response = httpClient.execute(httpGet);
            //通过返回对象获取返回数据
            HttpEntity entity = response.getEntity();
            //通过EntityUtils中的toString方法将结果转换为字符串，后续根据需要处理对应的reponse code
            result = EntityUtils.toString(entity);
            System.out.println(result);

        }catch (ClientProtocolException e){
            e.printStackTrace();
        }catch (IOException ioe){
            ioe.printStackTrace();
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            //关闭资源
            if(response != null){
                try {
                    response.close();
                }catch (IOException ioe){
                    ioe.printStackTrace();
                }
            }
            if(httpClient != null){
                try{
                    httpClient.close();
                }catch (IOException ioe){
                    ioe.printStackTrace();
                }
            }
        }
        return result;
    }