/**
* @title JSON转换属性过滤器 * @description 用于JSON lib的JSON转换 * @author maohuidong * @date 2017-04-06 */public class JsonConvertPropertyFilter implements PropertyFilter { /** * @function apply * @param obj：待转换的对象 s： 对象的属性 value：对象的属性值 * @description JSON转换属性过滤器（Hibernate） * @return true:过滤 false:不过滤 * @author maohuidong * @date 2017-04-06 */ @Override public boolean apply(Object obj, String s, Object value) { // hibernate代理对象未初始化，则过滤掉 if (value instanceof HibernateProxy) { LazyInitializer initializer = ((HibernateProxy) value) .getHibernateLazyInitializer(); if (initializer.isUninitialized()) { return true; } } // Hibernate持久化集合为初始化，则过滤掉（实体关联一对多） if (value instanceof PersistentCollection) { PersistentCollection collection = (PersistentCollection) value; if (!collection.wasInitialized()) { return true; } } return false; }}
/**
* @function objStreamOutput * @param 无 * @description 输出流封装 * @return 无 * @author maohuidong * @date 2017-04-09 */ protected void objStreamOutput(Object object,List<String> fieldFilter) throws IOException{ HttpServletResponse response = ServletActionContext.getResponse(); response.setCharacterEncoding("utf-8"); PrintWriter pWriter = response.getWriter(); //Json过滤 JsonConfig jsonConfig = new JsonConfig(); jsonConfig.setIgnoreDefaultExcludes(false); if(fieldFilter == null){ fieldFilter = new ArrayList<String>(); } //Json转换过滤没用的字段 fieldFilter.add("hibernateLazyInitializer"); String[] filter = new String[fieldFilter.size()]; filter = fieldFilter.toArray(filter); jsonConfig.setExcludes(filter); //Json转换过滤未初始化的数据 jsonConfig.setJsonPropertyFilter(new JsonConvertPropertyFilter()); //结果转换为json字符串 String str = ""; //结果集能实例化为List if(object instanceof List){ JSONArray jsonArray = JSONArray.fromObject(object, jsonConfig); str = jsonArray.toString(); }else if(object instanceof String){ str = (String) object; }else if(object instanceof Number){ str = object.toString(); } else{ JSONObject jsonObject = JSONObject.fromObject(object, jsonConfig); str = jsonObject.toString(); } pWriter.print(str); pWriter.flush(); pWriter.close(); }