Java实体和redis中的Hash相互的转换代码,Java代码库,德仔网

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【Java】 Java实体和redis中的Hash相互的转换

作者:jessica / 发布于2014/12/30/ 942

项目中使用redis作为缓存,此代码用来将Java实体映射成redis中对应的Hash,和将redis中的Hash映射成Java实体


	package com.i91ku.onepiece.cache.utils;
	
	import com.google.common.collect.Maps;
	import com.i91ku.common.util.ObjectUtil;
	import org.apache.commons.beanutils.BeanUtils;
	import org.apache.commons.beanutils.ConvertUtils;
	import org.apache.commons.beanutils.converters.*;
	
	import java.beans.BeanInfo;
	import java.beans.IntrospectionException;
	import java.beans.Introspector;
	import java.beans.PropertyDescriptor;
	import java.lang.reflect.InvocationTargetException;
	import java.util.Map;
	
	/**
	* CreateDate : 14-12-22 上午11:51
	*
	* @author gongweixin
	* @version 1.1
	*/
	public class EntityUtils {
	
	 static {
	 ConvertUtils.register(new LongConverter(null), Long.class);
	 ConvertUtils.register(new ByteConverter(null), Byte.class);
	 ConvertUtils.register(new IntegerConverter(null), Integer.class);
	 ConvertUtils.register(new DoubleConverter(null), Double.class);
	 ConvertUtils.register(new ShortConverter(null), Short.class);
	 ConvertUtils.register(new FloatConverter(null), Float.class);
	 }
	
	 public static Map<String, String> objectToHash(Object obj) {
	 try {
	 Map<String, String> map = Maps.newHashMap();
	 BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
	 PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
	 for (PropertyDescriptor property : propertyDescriptors) {
	 if (!property.getName().equals("class")) {
	 if (property.getReadMethod().invoke(obj) != null) {
	 map.put(property.getName(), "" + property.getReadMethod().invoke(obj));
	 }
	 }
	 }
	 return map;
	 } catch (IntrospectionException | InvocationTargetException | IllegalAccessException e) {
	 throw new RuntimeException(e);
	 }
	 }
	
	 @SuppressWarnings("unchecked")
	 private static void hashToObject(Map<?, ?> map, Object obj) {
	 try {
	 BeanUtils.populate(obj, (Map)map);
	 } catch (IllegalAccessException | InvocationTargetException e) {
	 throw new RuntimeException(e);
	 }
	 }
	
	 @SuppressWarnings("unchecked")
	 public static <T> T hashToObject(Map<?, ?> map, Class c) {
	 if (ObjectUtil.isEmpty(map)) {
	 return null;
	 }
	 try {
	 Object obj = c.newInstance();
	 hashToObject(map, obj);
	 return (T)obj;
	 } catch (InstantiationException | IllegalAccessException e) {
	 throw new RuntimeException(e);
	 }
	 }
	}

试试其它关键字

　Java实体　　 redis　　Hash　

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