自定义HttpClient工具类

自定义HttpClient工具类

简介

• 依赖
  
  org.apache.httpcomponents
  httpclient
  4.5.6
  
  

api

• 发送get请求: doGet(String url);
• 发送post请求，传参数json: *doPostJson(String url, String jsonParam);*

源码

• import java.util.HashMap;
  import java.util.Map;
   
  import org.apache.http.HttpEntity;
  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.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.protocol.HTTP;
  import org.apache.http.util.EntityUtils;
   
  import com.alibaba.fastjson.JSON;
   
  /* 依赖
  
  org.apache.httpcomponents
  httpclient
  4.5.6
  
  */
  public class HttpClientUtils {
  	
  	public static void main(String[] args) {
  		doGet("http://127.0.0.1/test1");
  		
  		Map data = new HashMap();
  		data.put("code", "002");
  		data.put("name", "测试");
  		doPostJson("http://127.0.0.1/test2", Object2String(data));
  		
  	}
  	
  	public static void doPostJson(String url, String jsonParam){
          try {
              CloseableHttpClient client = null;
              CloseableHttpResponse response = null;
              try {
                  HttpPost httpPost = new HttpPost(url);
                  httpPost.setHeader(HTTP.CONTENT_TYPE, "application/json");
                  httpPost.setEntity(new StringEntity(jsonParam, ContentType.create("text/json", "UTF-8")));
                  client = HttpClients.createDefault();
                  response = client.execute(httpPost);
                  int code = response.getStatusLine().getStatusCode();
                  HttpEntity entity = response.getEntity();
                  String result = EntityUtils.toString(entity);
                  System.err.println(code);
                  System.err.println(result);
              } finally {
                  if (response != null) {
                      response.close();
                  }
                  if (client != null) {
                      client.close();
                  }
              }
          } catch (Exception e) {
              e.printStackTrace();
          }
  	}
  	
  	
  	public static void doGet(String url){
          try {
              CloseableHttpClient client = null;
              CloseableHttpResponse response = null;
              try {
                  HttpGet httpGet = new HttpGet(url);
                  client = HttpClients.createDefault();
                  response = client.execute(httpGet);
                  HttpEntity entity = response.getEntity();
                  String result = EntityUtils.toString(entity);
                  int code = response.getStatusLine().getStatusCode();
                  System.err.println(result);
                  System.err.println(code);
              } finally {
                  if (response != null) {
                      response.close();
                  }
                  if (client != null) {
                      client.close();
                  }
              }
          } catch (Exception e) {
              e.printStackTrace();
          }
  	}
  	
  	/** 将输入参数  转换为json字符串 */
  	public static String Object2String(Object obj){
  //		try {
  //			return new ObjectMapper().writeValueAsString(obj);
  //		} catch (JsonProcessingException e) {
  //			e.printStackTrace();
  //		}
  		
  		return JSON.toJSONString(obj);
  	}
  	
  	
  	//TODO 待解决： 服务端接收后有中文款乱码问题
  //	public static void doPostForm(String url, String formParam){
  //        try {
  //            CloseableHttpClient client = null;
  //            CloseableHttpResponse response = null;
  //            try {
  //                // 创建一个提交数据的容器
  //                List parames = new ArrayList<>();
  //                parames.add(new BasicNameValuePair("userId", "001"));
  //                parames.add(new BasicNameValuePair("userName", "测试"));
  //                
  //                HttpPost httpPost = new HttpPost(url);
  //                httpPost.setHeader(HTTP.CONTENT_TYPE, "application/x-www-form-urlencoded;charset=UTF-8");
  //                httpPost.setEntity(new UrlEncodedFormEntity(parames, "UTF-8"));
  //                client = HttpClients.createDefault();
  //                response = client.execute(httpPost);
  //                HttpEntity entity = response.getEntity();
  //                String result = EntityUtils.toString(entity);
  //                System.err.println(result);
  //            } finally {
  //                if (response != null) {
  //                    response.close();
  //                }
  //                if (client != null) {
  //                    client.close();
  //                }
  //            }
  //        } catch (Exception e) {
  //            e.printStackTrace();
  //        }
  //	}
  }