实战演练java 调用http接口 post 例子

发起请求：

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.text.SimpleDateFormat;

import org.apache.http.util.TextUtils;

import com.alibaba.fastjson.JSONObject;

import cn.com.doone.tx.cloud.tool.common.util.Md5Util;

import java.util.Collection;
import java.util.Date;

public class IntfMain {

	//post请求方法
	 public static String post(String strURL, String params) {  
	        System.out.println(strURL);  
	        System.out.println(params); 
	        String result = "";
	        BufferedReader reader = null;
	        
	        StringBuilder sb = new StringBuilder();
	        BufferedReader in = null;
	        try {  
	            URL url = new URL(strURL);// 创建连接  
	            HttpURLConnection connection = (HttpURLConnection) url.openConnection();  
	            connection.setDoOutput(true);  
	            connection.setDoInput(true);  
	            connection.setUseCaches(false);  
	            connection.setInstanceFollowRedirects(true);  
	            connection.setRequestMethod("POST"); // 设置请求方式  
	            connection.setRequestProperty("Accept", "application/json"); // 设置接收数据的格式  
	            connection.setRequestProperty("Content-Type", "application/json"); // 设置发送数据的格式  
	            connection.connect();  
	            if (params != null && !TextUtils.isEmpty(params)) {
	                byte[] writebytes = params.getBytes();
	                // 设置文件长度
	             //   connection.setRequestProperty("Content-Length", String.valueOf(writebytes.length));
	                OutputStream outwritestream = connection.getOutputStream();
	                outwritestream.write(params.getBytes());
	                outwritestream.flush();
	                outwritestream.close();
	            }
	            int responseCode = connection.getResponseCode();  
		    	InputStream inputStream = null;  

		    	
	            if (responseCode == 200) {  
		    		inputStream = new BufferedInputStream(connection.getInputStream());  
	            } else {  
		    		inputStream = new BufferedInputStream(connection.getErrorStream());  
		    	} 
	            
	            in = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));
				String line;
				while ((line = in.readLine()) != null) {
					result+=line;
				}
	        } catch (Exception e) {
	            e.printStackTrace();
	        } finally {
	            if (reader != null) {
	                try {
	                    reader.close();
	                } catch (IOException e) {
	                    e.printStackTrace();
	                }
	            }
	        }
	        return result;
	    }
	  
	  
	  
	  

	public static void main(String[] args) {
		//String url = "http://localhost:28001/intf/send";
		String url = "http://###:##/gdctsWeb/intf/send";
		
		long createTime = new Date().getTime();
		long reqTime = new Date().getTime();
		
		String bodyStr="{\"creator\":\"4\",\"operator\":\"4\",\"operateType\":\"ADD\",\"channelCode\":\"V7\",\"synId\":\"556445\",\"name\":\"計算機团体345\",\"password\":\"345123\",\"registerTime\":\"2018-07-0121:00:00\",\"account\":\"account041\",\"custType\":\"2\",\"bindNumber\":\"15055556666\",\"groupContact\":[{\"contactName\":\"团体联系人\",\"contactNumber\":\"155555555\",\"email\":\"2222@qq.com\",\"occupation\":\"leader\",\"qq\":\"313131\",\"remark\":\"联系人备注\"}],\"groupInfoEvt\":[{\"address\":\"团体地址\",\"areaCode\":\"111\",\"busiArea\":\"222\",\"cityCode\":\"322\",\"custIndustry\":\"行业\",\"groupNature\":\"性质\",\"groupSize\":\"大\",\"name\":\"某团体客户\",\"provinceCode\":\"1111\",\"registeredCapital\":\"资本\",\"remark\":\"备注\",\"zipCode\":\"350000\"}],\"members\":[{\"name\":\"名称\",\"contactNumber\":\"111444\",\"cerType\":\"1\",\"cerNo\":\"6874268552552\",\"sex\":\"1\",\"age\":\"10\"}],\"resource\":\"介绍\"}";
		

		JSONObject paramJson = new JSONObject(true);
		JSONObject body = new JSONObject(true);
		body=JSONObject.parseObject(bodyStr);
		
		JSONObject head = new JSONObject(true);
		String intfCode = "CRM_CUSTGROUP004";
		String sysSecret="GRD01";
		String sysCode="V7";
		
		String signOri=sysCode+intfCode+sysSecret+reqTime;
		Collection