datatables接收自定义返回参数

"sAjaxSource" : "<%=PATH%>/listt?&now=" + new Date().getTime(), 
　　//服务器端，数据回调处理 
　　"fnServerData" : function(sSource, aDataSet, fnCallback, oSettings) {
　　　　oSettings.jqXHR = $.ajax({ 
　　　　"dataType" : ‘json‘, 
　　　　"type" : "POST", 
　　　　"url" : sSource, 
　　　　"data" : aDataSet, 
　　　　"success" : fnCallback 
　　});
}

"fnDrawCallback" : function(oSettings){

//取出服务器返回的自定义参数

　　var aaMap = JSON.parse(oSettings.jqXHR.responseText).aaMap;
　　var totalInsurMoney = aaMap.totalInsurMoney;
　　var totalMoney = aaMap.totalMoney;
　　
}

package cn.shibei.dto;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * 
 * @author huangfeihong
 *
 */
public class DataTablesGrid implements java.io.Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = -7580029322263269040L;
    private long iTotalRecords;// 过滤前总记录数
    private long iTotalDisplayRecords;// 过滤后总记录数，未开启过滤，不使用
    private String sSearch;// 页面发来的参数，原样返回
    private List aaData = new ArrayList();// 包含数据的list
    private Map<Object, Object> aaMap = new HashMap<Object, Object>();//自定义返回参数及数据

    public DataTablesGrid() {
    }

    public DataTablesGrid(long iTotalRecords, long iTotalDisplayRecords,
            String sSearch, List aaData) {
        super();
        this.iTotalRecords = iTotalRecords;
        this.iTotalDisplayRecords = iTotalDisplayRecords;
        this.sSearch = sSearch;
        this.aaData = aaData;
    }

    public long getiTotalRecords() {
        return iTotalRecords;
    }

    public void setiTotalRecords(long iTotalRecords) {
        this.iTotalRecords = iTotalRecords;
    }

    public long getiTotalDisplayRecords() {
        return iTotalDisplayRecords;
    }

    public void setiTotalDisplayRecords(long iTotalDisplayRecords) {
        this.iTotalDisplayRecords = iTotalDisplayRecords;
    }

    public String getsSearch() {
        return sSearch;
    }

    public void setsSearch(String sSearch) {
        this.sSearch = sSearch;
    }

    public List getAaData() {
        return aaData;
    }

    public void setAaData(List aaData) {
        this.aaData = aaData;
    }

    public static long getSerialversionuid() {
        return serialVersionUID;
    }

    public Map<Object, Object> getAaMap() {
        return aaMap;
    }

    public void setAaMap(Map<Object, Object> aaMap) {
        this.aaMap = aaMap;
    }

}