post请求参数Json字符串包含数组的校验和处理

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);
        }
    }
}