json包含数组如何转换为javabean

Map<String, Class> classMap = new HashMap<String, Class>();
classMap.put("orderList", OrderListBean.class);
classMap.put("subOrderList", SubOrderListBean.class);
classMap.put("merchList", MerchListBean.class);
CodeInputBean bean = (CodeInputBean) JSONObject.toBean(
JSONObject.fromObject(json), CodeInputBean.class, classMap);

public class OrderListBean {

private String merNo;
private String orderId;
private String adv;
private String orderMsg;
private String merchSrc;
private String msgType;
private List<SubOrderListBean> subOrderList;
}

public class SubOrderListBean {

private List<MerchListBean> merchList;//数量amount
private String subOrderId;//子订单号
private BigDecimal orderAmt;
private BigDecimal paymentAmt;
private BigDecimal unpayAmt;
private String merchName;//商品名称
private String merchId; //商城商品编号
private String merchCode;//核销平台 导入商品编号
private String merchDecription;//商品描述<短信信息>
private String createDate;
private String endDate;
}

public class MerchListBean {
private String merchOrderId;
}