Java post请求工具类

1.post请求 参数为?a=1&b=2&c=3
2.post请求 参数为{“a”:1,“b”:2,“c”:3} JSON格式

package cn.test.test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicHeader;
import org.apache.http.protocol.HTTP;

import com.alibaba.fastjson.JSONObject;

public class URLConnection {
	 
	/**
	 * post请求封装 参数为?a=1&b=2&c=3
	 * @param path 接口地址
	 * @param Info 参数
	 * @return
	 * @throws IOException
	 */
    public static JSONObject postResponse(String path,String Info) throws IOException{
         
        //1, 得到URL对象 
        URL url = new URL(path); 
           
        //2, 打开连接 
        HttpURLConnection conn = (HttpURLConnection) url.openConnection(); 
           
        //3, 设置提交类型 
        conn.setRequestMethod("POST"); 
           
        //4, 设置允许写出数据,默认是不允许 false 
        conn.setDoOutput(true); 
        conn.setDoInput(true);//当前的连接可以从服务器读取内容, 默认是true 
           
        //5, 获取向服务器写出数据的流 
        OutputStream os = conn.getOutputStream(); 
        //参数是键值队  , 不以"?"开始 
        os.write(Info.getBytes()); 
        //os.write("googleTokenKey=&username=admin&password=5df5c29ae86331e1b5b526ad90d767e4".getBytes()); 
        os.flush();
        //6, 获取响应的数据 
       //得到服务器写回的响应数据 
        BufferedReader br=new BufferedReader(new InputStreamReader(conn.getInputStream(),"utf-8"));
        String str = br.readLine();   
        JSONObject json = JSONObject.parseObject(str);
        
        System.out.println("响应内容为:  " + json); 
               
      return  json;
    }
    /**
	 * post请求封装 参数为{"a":1,"b":2,"c":3}
	 * @param path 接口地址
	 * @param Info 参数
	 * @return
	 * @throws IOException
	 */
    public static JSONObject postResponse(String path,JSONObject Info) throws IOException{
    	HttpClient client = new DefaultHttpClient();
        HttpPost post = new HttpPost(path);
        
        post.setHeader("Content-Type", "application/json");
        post.addHeader("Authorization", "Basic YWRtaW46");
        String result = "";
        
        try {
            StringEntity s = new StringEntity(Info.toString(), "utf-8");
            s.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE,"application/json"));
            post.setEntity(s);

            // 发送请求
            HttpResponse httpResponse = client.execute(post);

            // 获取响应输入流
            InputStream inStream = httpResponse.getEntity().getContent();
            BufferedReader reader = new BufferedReader(new InputStreamReader(inStream, "utf-8"));
            StringBuilder strber = new StringBuilder();
            String line = null;
            while ((line = reader.readLine()) != null)
            strber.append(line + "\n");
            inStream.close();

            result = strber.toString();
            System.out.println(result);
            
            if (httpResponse.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
                System.out.println("请求服务器成功，做相应处理");
            } else {
                System.out.println("请求服务端失败");
            }

        } catch (Exception e) {
            System.out.println("请求异常");
            throw new RuntimeException(e);
        }

        return JSONObject.parseObject(result);
    }
	
}

//main
public static void main(String[] args) {
	try {
		JSONObject json = new JSONObject();
		
		//第一种post请求 参数为 a=1&b=2&c=3
		json = URLConnection.postResponse("https://www.apiopen.top/weatherApi", "city=上海&&test=111");
		System.out.println("json的数据为:" + json);
		
		//第二种post请求 参数为 json
		json.put("test", "参数1");
		json.put("test2", "参数2");
		json = URLConnection.postResponse("http://url", json);
	} catch (IOException e) {
		e.printStackTrace();
	}
}