java使用http获取 GET请求接口数据代码

一，postman截图：

二，java代码：

package com.cxqy.officialserver.dto.personalsub;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

/**
 * @Author y
 * @Date 2022/6/14 15:16
 * @Version 1.0
 */

public class GoodsPa {

    private String url;
    public GoodsPa(String url) {
        this.url = url;
    }

    public void process() {
        String res = HttpClientUtils.get((this.url));


        JSONObject object = JSONObject.parseObject(res);
        System.out.println("object------->"+object);

 //这里因为listDataMap中是数组的形式，所以要转成JSONArray来取
    JSONArray listDataMap =  (JSONArray)getValue(object,"list");

    //取出数组中第一个值里面所需要的key对应的value

        System.out.println(getValue(listDataMap.getJSONObject(0),"title"));
//        System.out.println(getValue(listDataMap.getJSONObject(0),"thumb"));
        System.out.println(getValue(listDataMap.getJSONObject(1),"title"));
//        System.out.println(getValue(listDataMap.getJSONObject(1),"thumb"));
        System.out.println(getValue(listDataMap.getJSONObject(2),"title"));
        //     System.out.println(getValue(listDataMap.getJSONObject(2),"thumb"));
        System.out.println(getValue(listDataMap.getJSONObject(3),"title"));
        //   System.out.println(getValue(listDataMap.getJSONObject(3),"thumb"));
        System.out.println(getValue(listDataMap.getJSONObject(4),"title"));
        //   System.out.println(getValue(listDataMap.getJSONObject(4),"thumb"));
        System.out.println(getValue(listDataMap.getJSONObject(5),"title"));
        //  System.out.println(getValue(listDataMap.getJSONObject(5),"thumb"));
        System.out.println(getValue(listDataMap.getJSONObject(6),"title"));
        //  System.out.println(getValue(listDataMap.getJSONObject(6),"thumb"));
        System.out.println(getValue(listDataMap.getJSONObject(7),"title"));
        // System.out.println(getValue(listDataMap.getJSONObject(7),"thumb"));
        System.out.println(getValue(listDataMap.getJSONObject(8),"title"));
        //  System.out.println(getValue(listDataMap.getJSONObject(8),"thumb"));
        System.out.println(getValue(listDataMap.getJSONObject(9),"title"));
        // System.out.println(getValue(listDataMap.getJSONObject(9),"thumb"));



//        List<JSONObject> items = (List<JSONObject>)((JSONObject)object.get("list")).get("title");
//        for(JSONObject item : items){
//            this.urlList.add(item.getString("title"));
//        }


    }

    public static Object getValue(JSONObject json, String key){
        if(json ==null){
            return null;
        }else {
            if(json.isEmpty()){
                return null;
            }else {
                return json.get(key);
            }
        }
    }

    public static void main(String[] args) {
        String url = "https://new.yunpinshop.com/app/ewei_shopv2_api.php?i=2&r=goods.get_list&page=132&comefrom=wxapp&openid=sns_wa_&mid=110454&merchid=&authkey=&timestamp=1655188745941";
        GoodsPa processor = new GoodsPa(url);

        processor.process();


    }
}

package com.cxqy.officialserver.dto.personalsub;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
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.HttpUriRequest;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustStrategy;
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.ssl.SSLContextBuilder;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.GeneralSecurityException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @Author yjl
 * @Date 2021/12/31 14:56
 * @Version 1.0
 */



public class HttpClientUtils {

    public static Map<String, List<String>> convertHeaders(Header[] headers) {
        Map<String, List<String>> results = new HashMap<String, List<String>>();
        for (Header header : headers) {
            List<String> list = results.get(header.getName());
            if (list == null) {
                list = new ArrayList<String>();
                results.put(header.getName(), list);
            }
            list.add(header.getValue());
        }
        return results;
    }

    /**
     * http的get请求
     * @param url
     */
    public static String get(String url) {
        return get(url, "UTF-8");
    }

    public static Logger logger = LoggerFactory.getLogger(HttpClientUtils.class);

    /**
     * http的get请求
     * @param url
     */
    public static String get(String url, String charset) {
        HttpGet httpGet = new HttpGet(url);
        httpGet.setHeader("Connection","keep-alive");
        httpGet.setHeader("Host","new.yunpinshop.com");
        httpGet.setHeader("Connection","keep-alive");
        httpGet.setHeader("Accept","*/*");
        return executeRequest(httpGet, charset);
    }

    /**
     * http的get请求，增加异步请求头参数
     * @param url
     */
    public static String ajaxGet(String url) {
        return ajaxGet(url, "UTF-8");
    }

    /**
     * http的get请求，增加异步请求头参数
     *
     * @param url
     */
    public static String ajaxGet(String url, String charset) {
        HttpGet httpGet = new HttpGet(url);
        httpGet.setHeader("X-Requested-With", "XMLHttpRequest");
        return executeRequest(httpGet, charset);
    }

    /**
     * @param url
     * @return
     */
    public static String ajaxGet(CloseableHttpClient httpclient, String url) {
        HttpGet httpGet = new HttpGet(url);
        httpGet.setHeader("X-Requested-With", "XMLHttpRequest");
        return executeRequest(httpclient, httpGet, "UTF-8");
    }

    /**
     * http的post请求，传递map格式参数
     */
    public static String post(String url, Map<String, String> dataMap) {
        return post(url, dataMap, "UTF-8");
    }

    /**
     * http的post请求，传递map格式参数
     */
    public static String post(String url, Map<String, String> dataMap, String charset) {
        HttpPost httpPost = new HttpPost(url);
        try {
            if (dataMap != null) {
                List<NameValuePair> nvps = new ArrayList<NameValuePair>();
                for (Map.Entry<String, String> entry : dataMap.entrySet()) {
                    nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
                }
                UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(nvps, charset);
                formEntity.setContentEncoding(charset);
                httpPost.setEntity(formEntity);
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return executeRequest(httpPost, charset);
    }

    /**
     * http的post请求，增加异步请求头参数，传递map格式参数
     */
    public static String ajaxPost(String url, Map<String, String> dataMap) {
        return ajaxPost(url, dataMap, "UTF-8");
    }

    /**
     * http的post请求，增加异步请求头参数，传递map格式参数
     */
    public static String ajaxPost(String url, Map<String, String> dataMap, String charset) {
        HttpPost httpPost = new HttpPost(url);
        httpPost.setHeader("X-Requested-With", "XMLHttpRequest");
        try {
            if (dataMap != null) {
                List<NameValuePair> nvps = new ArrayList<NameValuePair>();
                for (Map.Entry<String, String> entry : dataMap.entrySet()) {
                    nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
                }
                UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(nvps, charset);
                formEntity.setContentEncoding(charset);
                httpPost.setEntity(formEntity);
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return executeRequest(httpPost, charset);
    }

    /**
     * http的post请求，增加异步请求头参数，传递json格式参数
     */
    public static String ajaxPostJson(String url, String jsonString) {
        return ajaxPostJson(url, jsonString, "UTF-8");
    }

    /**
     * http的post请求，增加异步请求头参数，传递json格式参数
*/
public static String ajaxPostJson(String url, String jsonString, String charset) {
        HttpPost httpPost = new HttpPost(url);        httpPost.setHeader
("X-Requested-With", "XMLHttpRequest");        StringEntity stringEntity = 

new StringEntity(jsonString, charset);// 解决中文乱码问题
        stringEntity.setContentEncoding(charset);        stringEntity.setContentType
("application/json");        httpPost.setEntity
(stringEntity);        
return executeRequest(httpPost, charset);    
}

/**
     * 执行一个http请求，传递HttpGet或HttpPost参数
*/
public static String executeRequest(HttpUriRequest httpRequest) {
return executeRequest(httpRequest, "UTF-8");    
}

/**
     * 执行一个http请求，传递HttpGet或HttpPost参数
*/
public static String executeRequest(HttpUriRequest httpRequest, String charset) {
        CloseableHttpClient httpclient;        
if ("https".equals(httpRequest.getURI().getScheme())) {
            httpclient = createSSLInsecureClient();        
} else {
            httpclient = HttpClients.createDefault();        
}
        String result = "";        
try {
try {
                CloseableHttpResponse response = httpclient.execute(httpRequest);                HttpEntity entity = 
null;                
try {
                    entity = response.getEntity();                    result = EntityUtils.
toString(entity, charset);                
} finally {
                    EntityUtils.consume(entity);                    response.close
();                
}
            } finally {
                httpclient.close();            
}
        } catch (IOException ex) {
            ex.printStackTrace();        
}
return result;    
}

public static String executeRequest(CloseableHttpClient httpclient, HttpUriRequest httpRequest, String charset) {
        String result = "";        
try {
try {
                CloseableHttpResponse response = httpclient.execute(httpRequest);                HttpEntity entity = 
null;                
try {
                    entity = response.getEntity();                    result = EntityUtils.
toString(entity, charset);                
} finally {
                    EntityUtils.consume(entity);                    response.close
();                
}
            } finally {
                httpclient.close();            
}
        } catch (IOException ex) {
            ex.printStackTrace();        
}
return result;    
}

/**
     * 创建 SSL连接，防止证书问题报错sslexception异常！！！！！！
*/
public static CloseableHttpClient createSSLInsecureClient() {
try {
            SSLContext sslContext = new SSLContextBuilder().loadTrustMaterial(new TrustStrategy() {
@Override
public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
return true;                
}
            }).build();            SSLConnectionSocketFactory sslsf = 
new SSLConnectionSocketFactory(sslContext, new HostnameVerifier() {
@Override
public boolean verify(String hostname, SSLSession session) {
return true;                
}
            });            
return HttpClients.custom().setSSLSocketFactory(sslsf).build();        
} catch (GeneralSecurityException ex) {
throw new RuntimeException(ex);        
}
    }
}

三，输出结果：

得到筛选后数据。

使用postman循环调用接口插入数据库

优化代码：

业务层：

@Override
    public boolean addGoods() {


        Integer s = aPcUserMapper.selectLog();
        int page = s+1;
        if (page <= 160 ){


        String url = "https://new.yunpinshop.com/app/ewei_shopv2_api.php?i=2&r=goods.get_list&page="+page+"&comefrom=wxapp&openid=sns_wa_&mid=110454&merchid=&authkey=&timestamp=1655188745941";

        String res = HttpClientUtils.get(url);

        JSONObject object = JSONObject.parseObject(res);
        System.out.println("object------->" + object);
        //这里因为listDataMap中是数组的形式，所以要转成JSONArray来取
        JSONArray listDataMap = (JSONArray) getValue(object, "list");
        //取出数组中第一个值里面所需要的key对应的value


        List<GoodsEntity> dd = new ArrayList<>();
        GoodsEntity good = new GoodsEntity();
        good.setGoodsName((String) getValue(listDataMap.getJSONObject(0), "title"));
        good.setPic((String) getValue(listDataMap.getJSONObject(0), "thumb"));
        dd.add(good);
        aPcUserMapper.addGoods(good);
        good.setGoodsName((String) getValue(listDataMap.getJSONObject(1), "title"));
        good.setPic((String) getValue(listDataMap.getJSONObject(1), "thumb"));
        dd.add(good);
        aPcUserMapper.addGoods(good);
        good.setGoodsName((String) getValue(listDataMap.getJSONObject(2), "title"));
        good.setPic((String) getValue(listDataMap.getJSONObject(2), "thumb"));
        dd.add(good);
        aPcUserMapper.addGoods(good);
        good.setGoodsName((String) getValue(listDataMap.getJSONObject(3), "title"));
        good.setPic((String) getValue(listDataMap.getJSONObject(3), "thumb"));
        dd.add(good);
        aPcUserMapper.addGoods(good);
        good.setGoodsName((String) getValue(listDataMap.getJSONObject(4), "title"));
        good.setPic((String) getValue(listDataMap.getJSONObject(4), "thumb"));
        dd.add(good);
        aPcUserMapper.addGoods(good);
        good.setGoodsName((String) getValue(listDataMap.getJSONObject(5), "title"));
        good.setPic((String) getValue(listDataMap.getJSONObject(5), "thumb"));
        dd.add(good);
        aPcUserMapper.addGoods(good);
        good.setGoodsName((String) getValue(listDataMap.getJSONObject(6), "title"));
        good.setPic((String) getValue(listDataMap.getJSONObject(6), "thumb"));
        dd.add(good);
        aPcUserMapper.addGoods(good);
        good.setGoodsName((String) getValue(listDataMap.getJSONObject(7), "title"));
        good.setPic((String) getValue(listDataMap.getJSONObject(7), "thumb"));
        dd.add(good);
        aPcUserMapper.addGoods(good);
        good.setGoodsName((String) getValue(listDataMap.getJSONObject(8), "title"));
        good.setPic((String) getValue(listDataMap.getJSONObject(8), "thumb"));
        dd.add(good);
        aPcUserMapper.addGoods(good);
        good.setGoodsName((String) getValue(listDataMap.getJSONObject(9), "title"));
        good.setPic((String) getValue(listDataMap.getJSONObject(9), "thumb"));
        dd.add(good);
        int i = aPcUserMapper.addGoods(good);
        if (i>0){
            GoodLog goodLog =new GoodLog();
            goodLog.setLog(s);
            int is = aPcUserMapper.addGoodsLog(goodLog);
            if (is > 0){
                return  true;
            }
        }

//        List<JSONObject> items = (List<JSONObject>)((JSONObject)object.get("list")).get("title");
//        for(JSONObject item : items){
//            this.urlList.ad\'
//
//            '
//            uiuiuuid(item.getString("title"));
//        }
        }
        return true;

    }

    public static Object getValue (JSONObject json, String key){
        if (json == null) {
            return null;
        } else {
            if (json.isEmpty()) {
                return null;
            } else {
                return json.get(key);
            }
        }
    }