JavaUtil/ObjectUtil.java at master · pgy1/JavaUtil · GitHub

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package cn.sinobest.ypgj.util;

import java.util.*;

/**
 * 对象判断
 * @author hexiaowei
 *
 */
public class ObjectUtil {

    /**
     * 判断对象是否Empty(null或元素为0)<br>
     * 实用于对如下对象做判断:String Collection及其子类 Map及其子类
     *
     * @param pObj
     *            待检查对象
     * @return boolean 返回的布尔值
     */
    public static boolean isEmpty(Object pObj) {
        if (pObj == null)
            return true;
        if (pObj == "")
            return true;
        if (pObj instanceof String) {
            if (((String) pObj).length() == 0) {
                return true;
            }
        } else if (pObj instanceof Collection) {
            if (((Collection) pObj).size() == 0) {
                return true;
            }
        } else if (pObj instanceof Map) {
            if (((Map) pObj).size() == 0) {
                return true;
            }
        }
        return false;
    }

    /**
     * 判断对象是否为NotEmpty(!null或元素>0)<br>
     * 实用于对如下对象做判断:String Collection及其子类 Map及其子类
     *
     * @param pObj
     *            待检查对象
     * @return boolean 返回的布尔值
     */
    public static boolean isNotEmpty(Object pObj) {
        if (pObj == null)
            return false;
        if (pObj == "")
            return false;
        if (pObj instanceof String) {
            if (((String) pObj).length() == 0) {
                return false;
            }
            if(((String) pObj).equalsIgnoreCase("null")) {
                return false;
            }
        } else if (pObj instanceof Collection) {
            if (((Collection) pObj).size() == 0) {
                return false;
            }
        } else if (pObj instanceof Map) {
            if (((Map) pObj).size() == 0) {
                return false;
            }
        }
        return true;
    }

}