[开发测试]httpClient请求接口，用httpEntity接受结果

标题

包含get和post的有参和无参的请求
post有参请求用httpEntity接受，处理成JsonObject类型

方法

package com.shzu.xyf.finding_sql_install_system.finding_sql_install_system.common;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import org.apache.http.*;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class HttpClientUtils {
    //    无参数的Get请求
    public static HttpEntity getWithoutParams(String url) {

        CloseableHttpClient httpClient = HttpClientBuilder.create().build();
        // 创建Get请求
        HttpGet httpGet = new HttpGet(url);

        // 响应模型
        CloseableHttpResponse response = null;
        try {
            // 由客户端执行(发送)Get请求
            response = httpClient.execute(httpGet);
            // 从响应模型中获取响应实体
            HttpEntity responseEntity = response.getEntity();
            System.out.println("响应状态为:" + response.getStatusLine());
            if (responseEntity != null) {
                System.out.println("响应内容长度为:" + responseEntity.getContentLength());
                System.out.println("响应内容为:" + EntityUtils.toString(responseEntity));
                return responseEntity;
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (ParseException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                // 释放资源
                if (httpClient != null) {
                    httpClient.close();
                }
                if (response != null) {
                    response.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

    //    带参数的Get请求
    public static HttpEntity getWithParams(String url, Map<String, String> paramMap) {
        // 获得Http客户端(可以理解为:你得先有一个浏览器;注意:实际上HttpClient与浏览器是不一样的)
        CloseableHttpClient httpClient = HttpClientBuilder.create().build();

        // 参数
        StringBuffer params = new StringBuffer();
        try {
            // 字符数据最好encoding以下;这样一来，某些特殊字符才能传过去(如:某人的名字就是“&”,不encoding的话,传不过去)

            for (Map.Entry<String, String> paramsEntry : paramMap.entrySet()) {
                params.append(paramsEntry.getKey() + "=" + URLEncoder.encode(paramsEntry.getValue(), "utf-8"));
                params.append("&");
            }
            params.deleteCharAt(params.length() - 1);


        } catch (UnsupportedEncodingException e1) {
            e1.printStackTrace();
        }

        // 创建Get请求
        HttpGet httpGet = new HttpGet(url + "?" + params);
        // 响应模型
        CloseableHttpResponse response = null;
        try {
            // 配置信息
            RequestConfig requestConfig = RequestConfig.custom()
                    // 设置连接超时时间(单位毫秒)
                    .setConnectTimeout(5000)
                    // 设置请求超时时间(单位毫秒)
                    .setConnectionRequestTimeout(5000)
                    // socket读写超时时间(单位毫秒)
                    .setSocketTimeout(5000)
                    // 设置是否允许重定向(默认为true)
                    .setRedirectsEnabled(true).build();

            // 将上面的配置信息 运用到这个Get请求里
            httpGet.setConfig(requestConfig);

            // 由客户端执行(发送)Get请求
            response = httpClient.execute(httpGet);

            // 从响应模型中获取响应实体
            HttpEntity responseEntity = response.getEntity();
            System.out.println("响应状态为:" + response.getStatusLine());
            if (responseEntity != null) {
                System.out.println("响应内容长度为:" + responseEntity.getContentLength());
                System.out.println("响应内容为:" + EntityUtils.toString(responseEntity));
                return responseEntity;
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (ParseException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                // 释放资源
                if (httpClient != null) {
                    httpClient.close();
                }
                if (response != null) {
                    response.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

//    不带参数的post请求
    public static HttpEntity postWithoutParam(String url){
        // 获得Http客户端(可以理解为:你得先有一个浏览器;注意:实际上HttpClient与浏览器是不一样的)
        CloseableHttpClient httpClient = HttpClientBuilder.create().build();

        // 创建Post请求
        HttpPost httpPost = new HttpPost(url);
        // 响应模型
        CloseableHttpResponse response = null;
        try {
            // 由客户端执行(发送)Post请求
            response = httpClient.execute(httpPost);
            // 从响应模型中获取响应实体
            HttpEntity responseEntity = response.getEntity();

            System.out.println("响应状态为:" + response.getStatusLine());
            if (responseEntity != null) {
                System.out.println("响应内容长度为:" + responseEntity.getContentLength());
                System.out.println("响应内容为:" + EntityUtils.toString(responseEntity));
                return responseEntity;
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (ParseException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                // 释放资源
                if (httpClient != null) {
                    httpClient.close();
                }
                if (response != null) {
                    response.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return null;
    }

    //    带参数的Post请求
    public static String getStrToPostWithParams(String url,JSONObject params) throws URISyntaxException {
        // 获得Http客户端(可以理解为:你得先有一个浏览器;注意:实际上HttpClient与浏览器是不一样的)
        CloseableHttpClient httpClient = HttpClientBuilder.create().build();

        // 创建Post请求
        // 参数
        URI uri = new URI(url);

        HttpPost httpPost = new HttpPost(uri);


        // 将user对象转换为json字符串，并放入entity中
        StringEntity entity = new StringEntity(JSON.toJSONString(params), "UTF-8");

        // post请求是将参数放在请求体里面传过去的;这里将entity放入post请求体中
        httpPost.setEntity(entity);

        httpPost.setHeader("Content-Type", "application/json;charset=utf8");

        // 响应模型
        CloseableHttpResponse response = null;
        try {
            // 由客户端执行(发送)Post请求
            response = httpClient.execute(httpPost);
            // 从响应模型中获取响应实体
            byte[] bytes = EntityUtils.toByteArray(response.getEntity());
            System.out.println("响应状态为:" + response.getStatusLine());
            if (bytes != null) {
                String resultStr = new String(bytes,"UTF-8");
                JSONObject jsonObject = JSONObject.parseObject(resultStr);
                return jsonObject.toJSONString();
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (ParseException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                // 释放资源
                if (httpClient != null) {
                    httpClient.close();
                }
                if (response != null) {
                    response.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

}

Demo

public class demo {
    public static void main(String[] args) throws JSONException, URISyntaxException, IOException {
        String url = "http://localhost:8000/post";
        JSONObject params = new JSONObject();
        params.put("eee","eee");
//        HttpEntity httpEntity = HttpClientUtils.postWithParams(url, params);
        String strToPostWithParams = HttpClientUtils.getStrToPostWithParams(url, params);

      JSONObject jsonObject = JSONObject.parseObject(strToPostWithParams);
        System.out.println(jsonObject.get("code"));

    }
}

测试接口

    @PostMapping("/post")
    @ResponseBody
    public JSONObject test(@RequestBody JSONObject data){
        System.out.println(data);
        JSONObject result = new JSONObject();
        result.put("code",1);
        return result;
    }