关于json的前后台处理

function forSave(){
      var table = document.getElementById("tableId");
      var tbody = table.getElementsByTagName("tbody")[0];
      var trs = tbody.getElementsByTagName("tr");

      var trsArr = [];
      var i = 0;
      for (i = 0;i < trs.length;i++){
          var obj = {};
        var tds  = trs[i].getElementsByTagName("td");
        for (var j = 0;j < tds.length;j++){
            var ss = tds[j].childNodes[0].value;
            var ss1 =encodeURI(encodeURI( tds[j].childNodes[0].name));



            obj[ss1] = ss;


        }


        trsArr.push(obj);


      }   
      alert(JSON.stringify(trsArr));//将json对象转化为字符串
      var bburl = "<%=request.getContextPath() %>/bbDeal";
      alert(bburl);
      $.ajax({
            url:bburl,
            async:false,
            data:{"data":JSON.stringify(trsArr)},
            dataType:"json",
            type:'post'
        });
} 

后台

package com.genersoft.yjgl.bbhz.kcswtzfjh.bbInsert;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;


import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.json.JSONArray;
import org.json.JSONException;

import com.genersoft.yjgl.bbhz.kcswtzfjh.data.Kcswtzfjh;



public class BbDealServlet extends HttpServlet{
    private static Log log = LogFactory.getLog(BbDealServlet.class);
    public void init(){

    }
    protected void doGet(HttpServletRequest req,HttpServletResponse rep) throws ServletException, IOException{



    }

    protected void doPost(HttpServletRequest req,HttpServletResponse rep) throws ServletException, IOException{
    //  JsonObject object=(JsonObject)new JsonParser().parse("data"); 
        req.setCharacterEncoding("utf-8");
        log.debug("------------------>doPost"+req.getParameter("data"));
        try {
            JSONArray jsonarray = new JSONArray(req.getParameter("data"));
            int len = jsonarray.length();
            List list = new ArrayList(); 
            for (int i = 0;i 
            {
                Kcswtzfjh kcswtzfjh = new Kcswtzfjh();
                jsonarray.getJSONObject(0).get("depot_name");
                kcswtzfjh.setDepot_name((String) jsonarray.getJSONObject(0).get("depot_name"));

                list.add(kcswtzfjh);

            }
        } catch (JSONException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }





    }



}