Mysql里查询字段为Json格式的数据模糊查询以及分页方法

 public void datagrid(CustomFormEntity customForm,HttpServletRequest request, HttpServletResponse response, DataGrid dataGrid) {
         //搜索参数
         StringBuffer searchSql=new StringBuffer("1=1");
         String showName = customForm.getShowName();
         if (StringUtil.isNotEmpty(showName) ) {
             searchSql.append(" and ").append(" mJson->'$.showName' like '%"+showName+"%'");
         }
         //头部
         StringBuffer sbHead=new StringBuffer();
         sbHead.append("SELECT * ");
         //查询体
         StringBuffer sbBody=new StringBuffer();
         sbBody.append(" from ");
         sbBody.append(" cf_model ");
         sbBody.append(" where ");
         sbBody.append(searchSql);
         sbBody.append(" order by sort asc");
         //查询
         Session session=this.systemService.getSession();
         //获取总数
         List<Object> listObj=systemService.findListbySql("select count(*) "+sbBody.toString());
         long count =Long.valueOf(""+listObj.get(0));

         int rows = dataGrid.getRows();
         int page = dataGrid.getPage();
         //解决查询搜索页码问题-获取不到数据
         if(((page-1)*rows)>=count){
             page=1;
         }
         //获取分页后数据
         String sql=sbHead.toString()+" "+sbBody.toString()+" LIMIT "+(page-1)*rows+","+dataGrid.getRows();
         //查询结构
         List<Map<String,Object>> c=systemService.findForJdbc(sql,new Object[]{});
         int size = c.size();
         List<Map<String,Object>> results= new ArrayList<Map<String,Object>>();
         for (int k = 0; k < size; k++) {
             Map map = (Map)JSON.parse((String)c.get(k).get("mJson"));
             map.put("id", c.get(k).get("id"));
             results.add(map);
         }
         //set data
         dataGrid.setResults(results);
         dataGrid.setTotal((int)count);
         TagUtil.datagrid(response, dataGrid);
     }

json表里面有个mJson字段数据如下面的Json格式

{"dataType":"1","id":"","ifMust":"1","laySort":"1","maxLen":"2","minLen":"1","showName":"身高"}

需要对其中的f开头的Json key值所对的value进行模糊查询，方法如下：

select *  from t_table_name where 1=1 and  mJson->'$.showName' like '%高%' order by sort asc