ValidateHelper.java

package org.xueyao.utils.base;

import java.lang.reflect.Array;
import java.util.Collection;
import java.util.Date;
import java.util.Map;

/**
 * 判断对象、字符串、集合是否为空、不为空
 * 
 * @Author:chenssy
 * @date:2014年8月4日
 */
public final class ValidateHelper {
	
	/**
	 *  判断数组是否为空
	 * @author chenssy
	 * @date Dec 23, 2013
	 * @param array
	 * @return boolean
	 */
	@SuppressWarnings("unused")
	private static <T> boolean isEmptyArray(T[] array){
		if (array == null || array.length == 0){
			return true;
		}
		else{
			return false;
		}
	}
	
	/**
	 *  判断数组是否不为空
	 * @author chenssy
	 * @date Dec 23, 2013
	 * @param array
	 * @return boolean
	 */
	public static <T> boolean isNotEmptyArray(T[] array){
		if (array != null && array.length > 0){
			return true;
		}
		else{
			return false;
		}
	}
	
	/**
	 *  判断字符串是否为空
	 * @author chenssy
	 * @date Dec 23, 2013
	 * @param string
	 * @return boolean
	 */
	public static boolean isEmptyString(String string){
		if (string == null || string.length() == 0){
			return true;
		}
		else{
			return false;
		}
	}
	
	/**
	 *  判断字符串是否不为空
	 * @author chenssy
	 * @date Dec 23, 2013
	 * @param string
	 * @return boolean
	 */
	public static boolean isNotEmptyString(String string){
		if (string != null && string.length() > 0){
			return true;
		}
		else{
			return false;
		}
	}
	
	/**
	 *  判断集合是否为空
	 * @author chenssy
	 * @date Dec 26, 2013
	 * @param collection
	 * @return boolean
	 */
	public static boolean isEmptyCollection(Collection<?> collection){
		if (collection == null || collection.isEmpty()){
			return true;
		}
		else{
			return false;
		}
	}
	
	/**
	 *  判断集合是否不为空
	 * @author chenssy
	 * @date Dec 26, 2013
	 * @param collection
	 * @return boolean
	 */
	public static boolean isNotEmptyCollection(Collection<?> collection){
		if (collection != null && !collection.isEmpty()){
			return true;
		}
		else{
			return false;
		}
	}
	
	/**
	 *  判断map集合是否不为空
	 * @author chenssy
	 * @date Dec 26, 2013
	 * @param map
	 * @return boolean
	 */
	@SuppressWarnings("rawtypes")
	public static boolean isNotEmptyMap(Map map){
		if (map != null && !map.isEmpty()){
			return true;
		}
		else{
			return false;
		}
	}
	
	/**
	 *  判断map集合是否为空
	 * @author ming.chen
	 * @date Dec 26, 2013
	 * @param map
	 * @return boolean
	 */
	@SuppressWarnings("rawtypes")
	public static boolean isEmptyMap(Map map){
		if (map == null || map.isEmpty()){
			return true;
		}
		else{
			return false;
		}
	}
	
	/**
	 * 检验对象是否为空,String 中只有空格在对象中也算空.
	 * @param object
	 * @return 为空返回true,否则false.
	 */
	@SuppressWarnings("rawtypes")
	public static boolean isEmpty(Object object) {
		if (null == object)
			return true;
		else if (object instanceof String)
			return "".equals(object.toString().trim());
		else if (object instanceof Iterable)
			return !((Iterable) object).iterator().hasNext();
		else if (object.getClass().isArray())
			return Array.getLength(object) == 0;
		else if (object instanceof Map)
			return ((Map) object).size() == 0;
		else if (Number.class.isAssignableFrom(object.getClass()))
			return false;
		else if (Date.class.isAssignableFrom(object.getClass()))
			return false;
		else
			return false;
	}
}