JSONObject与JSONArray的使用2

@Entity
@Table(name = "MARKET_LADDER_PRICE_INTERVAL")
@AttributeOverride(column = @Column(name = "INTERVAL_ID"), name = "id")
public class LadderPriceInterval extends IdEntity {
    private static final long serialVersionUID = 1L;
    
    private Integer beginNum;        // 开始区间
    private Integer endNum;            // 结束区间
    private String framId;         // 框架协议ID
    
    @Column(name = "BEGIN_NUM")
    public Integer getBeginNum() {
        return beginNum;
    }
    public void setBeginNum(Integer beginNum) {
        this.beginNum = beginNum;
    }
    @Column(name = "END_NUM")
    public Integer getEndNum() {
        return endNum;
    }
    public void setEndNum(Integer endNum) {
        this.endNum = endNum;
    }
    @Column(name = "FRAM_ID")
    public void setFramId(String framId) {
        this.framId = framId;
    }
    public void setSortNum(Integer sortNum) {
        this.sortNum = sortNum;
    }

}

    /**
     * 根据框架协议ID 获取商品阶梯价格
     */
    @RequestMapping(value = "/getLadListByFrameId")
    @ResponseBody
    public String getLadListByFrameId(String framId) {
          List<LadderPriceInterval> ladList=ladderPriceIntervalService.queryByFramId(framId);
          return  JSONArray.fromObject(ladList).toString();
    }

$.ajax({
                    type : "post",
                    data : {"framId":framId},
                    url : "/unionpay/scmarket/productController/getLadListByFrameId",
                    async : false,
                    success : function(data) {
                        var ladJson = new Array();
                        ladJson = eval("("+data+")");
                        if(ladJson!=null&&ladJson.length>=0){
                          for(var i in ladJson){
                                  var beginNum=ladJson[i].beginNum；
                                  var endNum=ladJson[i].endNum；  
                                 //你自己操作                                 
                              }
                        }
                   }
 });