HTTP协议post请求返回json数据

雨点打透心脏的1/2处 2023-10-17 12:56 53阅读 0赞

1.  有两种方式：大家详细看看，非常好用！

import java.io.BufferedReader;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import java.util.ArrayList;
    import java.util.List;
    import java.util.Map;
    
    import org.apache.http.HttpEntity;
    import org.apache.http.HttpResponse;
    import org.apache.http.HttpStatus;
    import org.apache.http.NameValuePair;
    import org.apache.http.client.HttpClient;
    import org.apache.http.client.entity.UrlEncodedFormEntity;
    import org.apache.http.client.methods.HttpPost;
    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.JSON;
    import com.jingyou.application.common.JSONUtils;
    public class HttpClientCheHuiTDH {
        public static String doPost(Map map)throws Exception {
    		//1 获得HttpClient这个工具类
        	HttpClient client = HttpClients.createDefault();
        	//2 设置Http请求方式 （get,post）
        	HttpPost post = new HttpPost("http://36.110.41.67:8090/dwjk/api/getAjbsAndAh/getNAjbs");//getAh
        	post.setHeader("systemid", "jingyoutimes");
        	post.setHeader("authcode", "3699185f24ddaa775805d5c476701098");
        	//3 传递数据
        //	JSONObject response = null;
        	String jsonTDH = JSONUtils.bean2json(map);
        	System.out.println(jsonTDH);
            try {
              StringEntity s = new StringEntity(jsonTDH.toString());
              s.setContentEncoding("UTF-8");
              s.setContentType("application/json");//发送json数据需要设置contentType
              post.setEntity(s);
              HttpResponse res = client.execute(post);
              if(res.getStatusLine().getStatusCode() == HttpStatus.SC_OK){
                HttpEntity entity = res.getEntity();
                String result = EntityUtils.toString(res.getEntity());// 返回json格式：
               // response = JSONObject.fromObject(result);
                System.out.println(result);
                return result;
              }
            } catch (Exception e) {
              throw new RuntimeException(e);
            }
            return null;
        	
        	//NameValuePair  NJbfyPair = new BasicNameValuePair("NJbfy","2050");
        /*	NameValuePair  NJbfyPair = new BasicNameValuePair("NJbfy","1700");
        	List<NameValuePair> params = new ArrayList<NameValuePair>();
        	params.add(NJbfyPair);
        	HttpEntity sendEntity = new UrlEncodedFormEntity(params,"UTF-8");
        	post.setEntity(sendEntity);
        	//4 发送请求  并 接受响应
        	HttpResponse response = client.execute(post);
        	
        	 * HttpClient中 把请求 或 响应的数据 都称之为 HttpEntity;
        	 
        	HttpEntity entity = response.getEntity();
        	InputStream is = entity.getContent();
        	//开始 传统的IO操作
        	InputStreamReader isr =  new InputStreamReader(is,"UTF-8");
        	BufferedReader br  = new BufferedReader(isr);
        	String flag = null;
        	while(true){
        		flag = br.readLine();
        		if(flag==null)break;
        		System.out.println(flag);
        		return flag;
        	}
        	return flag;*/
    	}
    }