封装HttpClient简化调用第三方api

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/u012557538/article/details/82383681

 一：工具类

package com.jianlejun.util;

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

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import com.alibaba.fastjson.JSONObject;

/**
 * HttpClient操作类
 * 
 * @author allan
 */
public class ApiUtils {

	public static URI buildUri(String url, Map<Object, Object> paramMap) throws URISyntaxException {
		URIBuilder builder = new URIBuilder(url);
		if (paramMap != null && !paramMap.isEmpty()) {
			for (Entry<Object, Object> entry : paramMap.entrySet()) {
				if (entry.getValue() instanceof java.util.List) {
					List<Object> list = (List<Object>) entry.getValue();
					List<NameValuePair> nvps = new ArrayList();
					for (Object value : list) {
						nvps.add(new BasicNameValuePair(entry.getKey().toString(), value.toString()));
					}
					builder.setParameters(nvps);
				} else {
					builder.setParameter(entry.getKey().toString(), entry.getValue().toString());
				}
			}
		}
		return builder.build();
	}

	/**
	 * 
	 * @param          <T>
	 * @param url      请求的apiUrl
	 * @param paramMap ?a=b&c=d形式参数
	 * @param token    认证token
	 * @param clazz    需要传递的json数据
	 * @return
	 * @throws URISyntaxException
	 * @throws ClientProtocolException
	 * @throws IOException
	 */
	public static <T> String postApi(String url, Map paramMap, String token, T clazz)
			throws URISyntaxException, ClientProtocolException, IOException {
		HttpPost post = new HttpPost(buildUri(url, paramMap));
		if (token != null) {
			post.setHeader("Authorization", "Bearer " + token);
		}
		if (clazz != null) {
			StringEntity httpEntity = new StringEntity(JSONObject.toJSONString(clazz), "UTF-8");
			httpEntity.setContentType("application/json;charset=UTF-8");
			post.setEntity(httpEntity);
		}
		HttpResponse resp = createHttpClient().execute(post);
		String respData = EntityUtils.toString(resp.getEntity());
		return respData == null ? "" : respData;
	}

	public static String getApi(String url, Map<Object, Object> paramMap, String token)
			throws URISyntaxException, ClientProtocolException, IOException {
		HttpGet get = new HttpGet(buildUri(url, paramMap));
		if (token != null) {
			get.setHeader("Authorization", "Bearer " + token);
		}
		HttpResponse resp = createHttpClient().execute(get);
		String respData = EntityUtils.toString(resp.getEntity());
		return respData == null ? "" : respData;
	}

	public static <T> String putApi(String url, Map paramMap, String token, T clazz)
			throws URISyntaxException, ClientProtocolException, IOException {
		HttpPut put = new HttpPut(buildUri(url, paramMap));
		if (token != null) {
			put.setHeader("Authorization", "Bearer " + token);
		}
		if (clazz != null) {
			StringEntity httpEntity = new StringEntity(JSONObject.toJSONString(clazz), "UTF-8");
			httpEntity.setContentType("application/json;charset=UTF-8");
			put.setEntity(httpEntity);
		}
		HttpResponse resp = createHttpClient().execute(put);
		String respData = EntityUtils.toString(resp.getEntity());
		return respData == null ? "" : respData;
	}

	public static HttpClient createHttpClient() {
		return HttpClients.createDefault();
	}
}

 二：客户端

package com.jianlejun.service;

import java.io.IOException;
import java.net.URISyntaxException;
import java.text.ParseException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.http.client.ClientProtocolException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.alibaba.fastjson.JSONObject;
import com.jianlejun.common.util.DateUtil;
import com.jianlejun.common.util.PropertyConfigurer;
import com.jianlejun.dto.Constant;
import com.jianlejun.request.AdjustDeskRequest;
import com.jianlejun.request.GetStatusHistoryRequest;
import com.jianlejun.request.GetTokenRequest;
import com.jianlejun.util.ApiUtils;

@Service
public class Client {
	private static Logger LOG = LoggerFactory.getLogger(Client.class);
	private String baseApiUrl;
	private String uniqueName;
	private String password;

	// 直接赋值，仅供测试使用,
	public Client() {
		baseApiUrl = "http://jianlejun.xxx.cn";
		uniqueName = "userName";
		password = "password";
	}

	public String getToken() throws ClientProtocolException, URISyntaxException, IOException {
		String respData = ApiUtils.postApi(baseApiUrl + Constant.DESK_API_URI.GET_TOKEN, null, null,
				new GetTokenRequest(uniqueName, password));
		JSONObject obj = JSONObject.parseObject(respData);
		return obj.getString("data");
	}
    //http://aa.bb.cn?aa=11&aa=22&aa=33
	public String getStatus(List<String> ids) throws ClientProtocolException, URISyntaxException, IOException {
		Map paramMap = new HashMap();
		if (ids == null || ids.isEmpty()) {
			paramMap = null;
		} else {
			paramMap.put("deskId", ids);
		}
		String respData = ApiUtils.getApi(baseApiUrl + Constant.DESK_API_URI.GET_STATUS, paramMap,
				this.getToken());
		return respData;
	}

	public String getStatusHistory(GetStatusHistoryRequest req)
			throws ClientProtocolException, URISyntaxException, IOException, ParseException {
		Map paramMap = new HashMap();
		if (req == null) {
			paramMap = null;
		} else {
			if (req.getDeskId() != null) {
				paramMap.put("deskId", req.getDeskId());
			}
			if (req.getStartTime() != null) {
				paramMap.put("startTime", DateUtil.format(req.getStartTime()));
			}
			if (req.getEndTime() != null) {
				paramMap.put("endTime", DateUtil.format(req.getEndTime()));
			}
			if (req.getOffset() != null) {
				paramMap.put("offset", req.getOffset());
			}
			if (req.getLimit() != null) {
				paramMap.put("limit", req.getLimit());
			}
		}
		String respData = ApiUtils.getApi(baseApiUrl + Constant.DESK_API_URI.GET_STATUS_HISTORY, paramMap,
				this.getToken());
		return respData;
	}
}

三：常量类

package com.jianlejun.dto;

public class Constant {
	
	public static class LOCK_STATUS {
		public static final String LOCK_STATUS_ON = "on";
		public static final String LOCK_STATUS_OFF = "off";
	}
	public static class DESK_API_URI{
		public static final String GET_TOKEN = "/api/token"; 
		public static final String GET_DESKS = "/xxx/ids"; 
		public static final String GET_STATUS = "/xxx/status"; ）
		public static final String ADJUST_HEIGHT = "/xxx/{deskId}/xxx"; 
		public static final String ADJUST_LOCK_STATUS = "/xxx/{deskId}/xxx"; 
		public static final String GET_STATUS_HISTORY = "/xxx/xxxx"; 
	}
}

四：测试类

public class Test {
	public static void main(String[] args) throws ClientProtocolException, URISyntaxException, IOException, ParseException {
		Client c = new Client();
		List<String> ids = new ArrayList();
		ids.add("1234567-da60-40fb-b14b-35c553b22899");
		ids.add("7654321-eb62-4dab-be32-9de0065f3bd2");
		System.out.println(c.getStatus(ids));
	}
}

五：DTO

package com.jianlejun.request;

public class GetTokenRequest {
	private String unique_name;
	private String password;

	public GetTokenRequest(String uniqueName, String password) {
		this.unique_name = uniqueName;
		this.password = password;
	}

	public String getUnique_name() {
		return unique_name;
	}

	public void setUnique_name(String unique_name) {
		this.unique_name = unique_name;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

}