Java+HttpClient库 封装get、键值对格式的post、json格式的post请求的工具方法【杭州多测师_王sir】

 

package cn.duoceshi.springbootdemo.utils;

import cn.duoceshi.springbootdemo.Enum.CodeEnum;
import cn.duoceshi.springbootdemo.model.HttpClientResponse;
import org.apache.http.Header;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * 2023-8-30号  多测师
 * 封装get、键值对格式的post、json格式的post请求的工具方法
 */
public class HttpClientUtils {

    public static HttpClientResponse doGet(String url, Map<String, String> param){
        return doGet(url, param, null);
    }

    public static HttpClientResponse doGet(String url, Map<String, String> param, Map<String, String> headers) {

        // 创建Httpclient对象
        CloseableHttpClient httpclient = HttpClients.createDefault();
        HttpClientResponse response = null;
        try {
            // 创建uri
            URIBuilder builder = new URIBuilder(url);
            if (param != null) {
                for (String key : param.keySet()) {
                    builder.addParameter(key, param.get(key));
                }
            }
            URI uri = builder.build();

            // 创建http GET请求
            HttpGet httpGet = new HttpGet(uri);
            packageHeader(httpGet, headers);

            response = getHttpClientResponse(httpclient, httpGet);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                httpclient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return response;
    }

    private static HttpClientResponse getHttpClientResponse(CloseableHttpClient httpclient, HttpRequestBase httpBase) throws IOException {

        // 执行请求
        CloseableHttpResponse response = httpclient.execute(httpBase);

        // 封装成自定义的响应对象
        if (response == null){
            return HttpClientResponse.builder().status(CodeEnum.EXCEPTION.getCode()).build();   //响应为空返回500
        }
        int status = response.getStatusLine().getStatusCode();
        Header[] headers = response.getAllHeaders();
        Map<String, String> map = new HashMap<>();
        for (Header header : headers){
            map.put(header.getName(), header.getValue());
        }
        String body = EntityUtils.toString(response.getEntity(), "UTF-8");
        return HttpClientResponse.builder()
                .status(status)
                .headers(map)
                .body(body).build();
    }

    public static HttpClientResponse doPost(String url, Map<String, String> param){
        return doPost(url, param, null);
    }

    /**
     * 表单类型的post
     *
     * @param url
     * @param param
     * @return
     */
    public static HttpClientResponse doPost(String url, Map<String, String> param, Map<String, String> headers) {
        // 创建Httpclient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpClientResponse response = null;
        try {
            // 创建Http Post请求
            HttpPost httpPost = new HttpPost(url);
            // 创建参数列表
            if (param != null) {
                List<NameValuePair> paramList = new ArrayList();
                for (String key : param.keySet()) {
                    paramList.add(new BasicNameValuePair(key, param.get(key)));
                }
                // 模拟表单
                UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList);
                httpPost.setEntity(entity);
            }

            // 添加header
            packageHeader(httpPost, headers);

            // 执行http请求
            response = getHttpClientResponse(httpClient, httpPost);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                httpClient.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

        return response;
    }


    public static HttpClientResponse doPostJson(String url, String json){
        return doPostJson(url, json, null);
    }

    /**
     * json类型的post接口
     * @param url
     * @param json
     * @return
     */
    public static HttpClientResponse doPostJson(String url, String json, Map<String, String> headers) {
        // 创建Httpclient对象
        CloseableHttpClient httpClient = HttpClients.createDefault();
        HttpClientResponse response = null;
        try {
            // 创建Http Post请求
            HttpPost httpPost = new HttpPost(url);
            // 创建请求内容
            StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);
            httpPost.setEntity(entity);

            // 添加header
            packageHeader(httpPost, headers);

            // 执行http请求
           response = getHttpClientResponse(httpClient, httpPost);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                httpClient.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        return response;
    }

    private static void packageHeader(HttpRequestBase httpBase, Map<String, String> headers) {
        //如果headers不为空、拿到键值对并且设置到请求头当中去
        if (headers != null) {
            for (Map.Entry<String, String> entry : headers.entrySet()) {
                httpBase.setHeader(entry.getKey(), entry.getValue());
            }
        }
    }
}