JSONUtils

最新推荐文章于 2020-08-05 20:21:59 发布

转载最新推荐文章于 2020-08-05 20:21:59 发布 · 805 阅读

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本文介绍了一个实用的JSON工具类，该工具类提供了日期格式化、对象到Map转换及JSON字符串生成等功能，适用于Java项目的快速开发。

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package cn.net.zzfz.center.common.util;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializeConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.serializer.SimpleDateFormatSerializer;

import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

public class JSONUtils
{
   public static SerializeConfig dateSerialize(String format)
   {
       SerializeConfig mapping = new SerializeConfig();
       mapping.put(Date.class, new SimpleDateFormatSerializer(format));

       return mapping;
   }


   @SuppressWarnings({ "rawtypes", "unchecked" })
   public static Map<String, Object> object2Map(Object object)
   {
       Map<String, Object> returnMap = new HashMap<String, Object>();

       if (object == null) {
           return returnMap;
       }

       if(object instanceof Map) {
           return (Map) object;
       }

       BeanInfo beanInfo = null;
       try {
           beanInfo = Introspector.getBeanInfo(object.getClass());
       } catch (IntrospectionException e1) {
           return returnMap;
       }

       PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
       for (int i = 0; i < propertyDescriptors.length; i++) {
           try {
               PropertyDescriptor descriptor = propertyDescriptors[i];
               String propertyName = descriptor.getName();
               if (!propertyName.equals("class")) {
                   Method readMethod = descriptor.getReadMethod();
                   Object result = readMethod.invoke(object, new Object[0]);
                   if (result != null)
                       returnMap.put(propertyName, result);
               }
           } catch (NullPointerException e) {
           } catch (Exception e) {
               break;
           }
       }

       return returnMap;
   }

   public static String toJSONString(Object object, String dateFormat)
   {
       return JSON.toJSONString(object, dateSerialize(dateFormat), new SerializerFeature[0]);
   }
}