data_fusion/DataFusion/src/com/zskk/control/ViewController.java

package com.zskk.control;

import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.alibaba.fastjson.JSON;
import com.jfinal.core.Controller;
import com.jfinal.plugin.activerecord.Db;
import com.jfinal.plugin.activerecord.Record;
import okhttp3.FormBody;
import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;

public class ViewController extends Controller {

	private static final MediaType JSON_CODE = MediaType.get("application/json; charset=utf-8");

	private static final OkHttpClient OKHTTP_CLIENT = new OkHttpClient();

	/**
	 * 在被连接数据库执行sql语句
	 */
	public void executeSql() {
		try {
			List<Record> d = Db.use("connected").find(this.getPara("sqlstr"));
			this.renderJson(d);
		} catch (Exception e) {
			// TODO: handle exception
			renderText(e.toString());
		}
		
	}

	/**
	 * post请求
	 * @param url-请求地址
	 * @param map-参数集合
	 * @return
	 */
	private static String doPost(String url, Map<String, String> map) {
		FormBody.Builder builder = new FormBody.Builder();
		for (String key : map.keySet()) {
			builder.add(key, map.get(key));
		}

		RequestBody formBody = builder.build();

		Request request = new Request.Builder().url(url).post(formBody).build();
		
		try (Response response = OKHTTP_CLIENT.newCall(request).execute()) {
			if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);
			String content = response.body().string();
			return content;
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return null;
		}
	}
	
	/**
	 * 日期字符串格式转换
	 * @param dateStr
	 * @return
	 */
	private Date parseStringToDate(String dateStr) {
		if (dateStr == null) {
			return new Date();
		}
		SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
	    Date date = null;
		try {
			date = sdf.parse(dateStr);
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
        return date;
	}

	public static void main(String[] args) {
        Map<String,String> paramsMap=new HashMap<String,String>();
        paramsMap.put("institution_id", "44100001");

		String contentString = doPost("https://risserver3.pacsonline.cn/butt/getExam/butt/getExam", paramsMap);
		System.out.println(contentString);

	}
}