传入参数类型 {
"aaa":"aaaa",
"bbb":"bbb",
"ccc":"ccc",
"waterMark":[{'name':'默认name1','position':'默认地址1'},{'name':'默认name2','position':'默认地址2'}]

}

遍历 

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.util.HashMap;

import java.util.Map;

import org.apache.log4j.Logger;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import com.alibaba.fastjson.JSON;

import com.alibaba.fastjson.JSONArray;

import com.alibaba.fastjson.JSONObject;

import com.xxx.live.core.util.others.ConfigUtil;

import com.xxxx.live.webapp.util.HttpClientUtil;

import com.xxxx.mobilevideo.core.util.StringUtil;

/**

 * Servlet implementation class CloudCutStreamServlet

 */

public class CloudCutStreamServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    Logger log = Logger.getLogger(RecordFinishServlet.class);

    /**

     * @see HttpServlet#HttpServlet()

     */

    public CloudCutStreamServlet() {

        super();

    }

    /**

     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse

     *      response)

     */

    protected void doGet(HttpServletRequest req, HttpServletResponse resp)

            throws ServletException, IOException {

        // TODO Auto-generated method stub

        this.doPost(req, resp);

    }

    /**

     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse

     *      response)

     */

    protected void doPost(HttpServletRequest req, HttpServletResponse resp)

            throws ServletException, IOException {

        //1.校验参数

        JSONObject resultMap = this.getResutltMap(req);

        if (null == resultMap) {

            response(resp, getMsg(false, "请求参数格式不正确", "10002"));

            return;

        }

        String liveName = resultMap.getString("liveName");

        String masterUrl = resultMap.getString("masterUrl");

        String slaveUrl = resultMap.getString("slaveUrl"); // 可以为空

        String reason=resultMap.getString("reason");       // 切流原因不可以为空

        JSONArray waterMark=resultMap.getJSONArray("waterMark"); //接收对象里的数组

        //判断水印是否为空，为空则使用默认水印，

        if(waterMark.isEmpty()){

            //使用默认的水印

            String waterMarkDefaultValue="[{'name':'默认name1','position':'默认地址1'},{'name':'默认name2','position':'默认地址2'}]";

            resultMap.put("waterMark", waterMarkDefaultValue);

        }else{

            //水印不为空判断数组中的json的key值是否为空

            int jsonSize =  waterMark.size(); //获取数组长度

            for(int i=0;i<jsonSize;i++){

                JSONObject jsonTemp = (JSONObject)waterMark.getJSONObject(i);

                if(StringUtil.isNullStr(jsonTemp.getString("name"))||StringUtil.isNullStr(jsonTemp.getString("position"))){

                    response(resp, getMsg(false, "参数为空", "10001"));

                    return;

                }

            }

        }

        // 接受参数校验

        if (StringUtil.isNullStr(liveName) || StringUtil.isNullStr(masterUrl)||StringUtil.isNullStr(reason)) {

            response(resp, getMsg(false, "参数为空", "10001"));

            return;

        }

        //参数正常

        try {

            String result ="";

            String change_source_url = ConfigUtil.getProperty("change_source_Url");

            response(resp, getMsg(true, "请求成功", "99999"));

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

    public JSONObject getResutltMap(HttpServletRequest req) {

        String requestStr = "";

        StringBuilder sb = new StringBuilder();

        InputStream is = null;

        BufferedReader dis = null;

        try {

            is = req.getInputStream();

            dis = new BufferedReader(new InputStreamReader(is, "utf-8"));

            String str = "";

            while ((str = dis.readLine()) != null) {

                sb.append(str);

            }

        } catch (IOException e) {

            e.printStackTrace();

        } finally {

            try {

                if (dis != null) {

                    dis.close();

                }

                if (is != null) {

                    is.close();

                }

            } catch (IOException e) {

                e.printStackTrace();

            }

        }

        requestStr = sb.toString();

        try {

            JSONObject json = JSON.parseObject(requestStr);

            return json;

        } catch (Exception e) {

        }

        return null;

    }

    private String getMsg(boolean success, String msg, String errCode) {

        Map<String, Object> returnMap = new HashMap<String, Object>();

        returnMap.put("success", success);

        returnMap.put("msg", msg);

        returnMap.put("errCode", errCode);

        String returnJson = JSON.toJSONString(returnMap);

        return returnJson;

    }

    private void response(HttpServletResponse resp, String msg) {

        try {

            resp.setContentType("text/html");

            resp.setCharacterEncoding("UTF-8");

            PrintWriter out = resp.getWriter();

            out.println(msg);

            out.close();

        } catch (Exception e) {

            log.error(e.getMessage(), e);

        }

    }

}