public static void main(String[] args) { ParamUtil paramUtil = new ParamUtil(); paramUtil.setType("1"); List<ConUtil> conUtilList = new ArrayList<ConUtil>(); ConUtil conUtil = new ConUtil(); conUtil.setArg("aaaa"); conUtil.setMsg("bbbb"); conUtil.setShortname("cccc"); conUtil.setValue("dddd"); conUtilList.add(conUtil); conUtil = new ConUtil(); conUtil.setArg("eeee"); conUtil.setMsg("rrrr"); conUtil.setShortname("tttt"); conUtil.setValue("yyyy"); conUtilList.add(conUtil); paramUtil.setConUtilList(conUtilList); paramUtil.setTablename("444444444444"); System.out.println(JsonUtil.buildNormalBinder().toJson(paramUtil)); }