使用HttpClient 获取第三方接口返回结果
最近需要在内网环境获取第三方接口提供的数据，只有jdk环境，没有maven环境，所以只能提前提供所需要的jar包
HttpClient 4
使用的jar包
代码
Request request = new Request(); try { //Set the request parameters. //AppKey, AppSecrect, Method and Url are required parameters. request.setKey("071fe245-9cf6-4d75-822d-c29945a1e06a"); request.setSecret("c6e52419-2270-4cb8-8bd4-ae7fdd01dcd5"); request.setMethod("GET"); request.setUrl("https://30030113-3657-4fb6-a7ef-90764239b038.apigw.cn-north-1.huaweicloud.com/app1?a=1"); request.addHeader("Content-Type", "text/plain");
//缺少验证
request.setBody("demo"); } catch (Exception e) { e.printStackTrace(); return; } CloseableHttpClient client = null; try { //Sign the request. HttpRequestBase signedRequest = Client.sign(request); //Send the request. client = HttpClients.custom().build(); HttpResponse response = client.execute(signedRequest); //Print the status line of the response. System.out.println(response.getStatusLine().toString()); //Print the header fields of the response. Header[] resHeaders = response.getAllHeaders(); for (Header h : resHeaders) { System.out.println(h.getName() + ":" + h.getValue()); } //Print the body of the response. HttpEntity resEntity = response.getEntity(); if (resEntity != null) { System.out.println(System.getProperty("line.separator") + EntityUtils.toString(resEntity, "UTF-8")); } } catch (Exception e) { e.printStackTrace(); } finally { try { if (client != null) { client.close(); } } catch (IOException e) { e.printStackTrace(); } }
HttpClient 5
使用jar包
代码
util类
import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Properties; import org.apache.hc.client5.http.classic.methods.HttpGet; import org.apache.hc.client5.http.impl.classic.CloseableHttpClient; import org.apache.hc.client5.http.impl.classic.CloseableHttpResponse; import org.apache.hc.client5.http.impl.classic.HttpClients; import org.apache.hc.core5.http.io.entity.EntityUtils; import org.apache.hc.core5.net.URIBuilder; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.JSONArray; import main.java.com.aostarit.data.ApiServiceTest; public class httpClientUnit { /* * * get请求 * @author slx * @date 2019/03/13 16:51 * @param [url, map] * @return HttpResult */ public static HttpResult doGet(String tableName, Map<String, Object> map) throws Exception { CloseableHttpClient httpClient = null; Properties pro=new Properties(); InputStream in = ApiServiceTest.class.getResourceAsStream("/main/resources/config/JDBC.properties"); pro.load(in); // 1 创建HttpClinet，相当于打开浏览器 httpClient = HttpClients.createDefault(); // 声明URIBuilder URIBuilder uriBuilder = new URIBuilder(pro.getProperty(tableName+".url")); // 判断参数map是否为非空 if (map != null) { // 遍历参数 for (Map.Entry<String, Object> entry : map.entrySet()) { // 设置参数 uriBuilder.setParameter(entry.getKey(), entry.getValue().toString()); } } // 2 创建httpGet对象，相当于设置url请求地址 HttpGet httpGet = new HttpGet(uriBuilder.build()); httpGet.addHeader("User-Agent","Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36"); httpGet.addHeader("Accept","application/json"); httpGet.addHeader("Authorization","Bearer 3893eb800a56905308236cfb63e9eb1c"); // httpGet.addHeader("appkey",pro.getProperty(tableName+"。appkey")); // httpGet.addHeader("appsecret",pro.getProperty(tableName+"。appsecret")); // 3 使用HttpClient执行httpGet，相当于按回车，发起请求 CloseableHttpResponse response = null; try { response = httpClient.execute(httpGet); } catch (IOException e) { HttpResult httpResult = new HttpResult(); httpResult.setCode(404); httpResult.setBody("接口请求失败！"); return httpResult; } // 4 解析结果，封装返回对象httpResult，相当于显示相应的结果 HttpResult httpResult = new HttpResult(); // 解析数据封装HttpResult if (response.getEntity() != null) { httpResult.setCode(response.getCode()); httpResult.setBody(EntityUtils.toString(response.getEntity(),"UTF-8")); } else { httpResult.setCode(response.getCode()); } in.close(); // 返回 return httpResult; } public static List<Map<String, Object>> json2Map(String jsonStr) throws Exception{ List<Map<String, Object>> resultList = new ArrayList<Map<String,Object>>(); try { Map<String, Object> data = new HashMap<String, Object>(); Map<String, Object> mapResult = JSON.parseObject(jsonStr); if (mapResult.get("data") != null) { //大小写返回 if(mapResult.get("data") != null && mapResult.get("data") != "") data = JSON.parseObject(mapResult.get("data").toString()); if(mapResult.get("DATA") != null && mapResult.get("DATA") != "") data = JSON.parseObject(mapResult.get("DATA").toString()); //根据返回内容，转为list String listStr = JSONArray.toJSONString(data.get("list")); List<Object> obj = JSON.parseArray(listStr); int i = 0; for (Object map : obj) { Map<String, Object> map2 = (Map<String, Object>) obj.get(i); resultList.add(map2); i ++; } } } catch (Exception e) { // TODO: handle exception e.printStackTrace(); } return resultList; } }
httpResult
package main.java.com.aostarit.utils; public class HttpResult { // 响应的状态码 private int code; // 响应的响应体 private String body; public int getCode() { return code; } public void setCode(int code) { this.code = code; } public String getBody() { return body; } public void setBody(String body) { this.body = body; } }
Test类
import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import main.java.com.aostarit.utils.HttpResult; import main.java.com.aostarit.utils.httpClientUnit; public class ApiServiceTest { public static void main(String[] args) throws Exception { String tableName = "COMPANYINFO"; Map<String, Object> map = new HashMap<String, Object>(); // map.put("param","50"); // map.put("pagesize","1"); map.put("offset","1"); map.put("limit","20"); map.put("gzzt","0"); map.put("_t","1606353457232"); HttpResult httpResult = httpClientUnit.doGet(tableName,map); System.out.println(httpResult.getCode()); System.out.println(httpResult.getBody()); List<Map<String, Object>> data= new ArrayList<Map<String,Object>>(); if (httpResult.getCode() == 200) { data = httpClientUnit.json2Map(httpResult.getBody()); } } }
public static HttpResult doGet(String tableName, Map<String, Object> map) throws Exception { CloseableHttpClient httpClient = null; Properties pro=new Properties(); InputStream in = ApiServiceTest.class.getResourceAsStream("/main/resources/config/JDBC.properties"); pro.load(in); // 1 创建HttpClinet，相当于打开浏览器 httpClient = HttpClients.createDefault(); // 声明URIBuilder URIBuilder uriBuilder = new URIBuilder(pro.getProperty(tableName+".url"));
// 判断参数map是否为非空 if (map != null) { // 遍历参数 for (Map.Entry<String, Object> entry : map.entrySet()) { // 设置参数 uriBuilder.setParameter(entry.getKey(), entry.getValue().toString()); } } // 2 创建httpGet对象，相当于设置url请求地址 HttpGet httpGet = new HttpGet(uriBuilder.build()); httpGet.addHeader("User-Agent","Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36"); httpGet.addHeader("Accept","application/json"); httpGet.addHeader("Authorization","Bearer 3893eb800a56905308236cfb63e9eb1c");// httpGet.addHeader("appkey",pro.getProperty(tableName+"。appkey"));// httpGet.addHeader("appsecret",pro.getProperty(tableName+"。appsecret")); // 3 使用HttpClient执行httpGet，相当于按回车，发起请求 CloseableHttpResponse response = null; try { response = httpClient.execute(httpGet); } catch (IOException e) { HttpResult httpResult = new HttpResult(); httpResult.setCode(404); httpResult.setBody("接口请求失败！"); return httpResult; }
// 4 解析结果，封装返回对象httpResult，相当于显示相应的结果 HttpResult httpResult = new HttpResult(); // 解析数据封装HttpResult if (response.getEntity() != null) { httpResult.setCode(response.getCode()); httpResult.setBody(EntityUtils.toString(response.getEntity(),"UTF-8")); } else { httpResult.setCode(response.getCode()); } in.close(); // 返回 return httpResult; } public static List<Map<String, Object>> json2Map(String jsonStr) throws Exception{ List<Map<String, Object>> resultList = new ArrayList<Map<String,Object>>(); try { Map<String, Object> data = new HashMap<String, Object>(); Map<String, Object> mapResult = JSON.parseObject(jsonStr); if (mapResult.get("data") != null) { //大小写返回 if(mapResult.get("data") != null && mapResult.get("data") != "") data = JSON.parseObject(mapResult.get("data").toString()); if(mapResult.get("DATA") != null && mapResult.get("DATA") != "") data = JSON.parseObject(mapResult.get("DATA").toString()); //根据返回内容，转为list String listStr = JSONArray.toJSONString(data.get("list")); List<Object> obj = JSON.parseArray(listStr); int i = 0; for (Object map : obj) {Map<String, Object> map2 = (Map<String, Object>) obj.get(i);resultList.add(map2);i ++;} }} catch (Exception e) {// TODO: handle exceptione.printStackTrace();} return resultList; }
