自定义类库:常用判空操作工具类

一、项目上校验空和空集合地方非常多，可以编写一个工具类统一校验

package com.moy.custom.utils;

import java.util.Collection;
import java.util.Map;

/**
 * [Project]:moy-gradle-project  <br/>
 * [Email]:moy25@foxmail.com  <br/>
 * [Date]:2018/1/31  <br/>
 * [Description]: 常用判空操作 <br/>
 *
 * @author YeXiangYang
 */
public abstract class NullUtils {

    /**
     * 对象是空，返回<tt>true<tt/>
     */
    public static boolean objectIsNull(Object obj) {
        return null == obj;
    }

    /**
     * 对象不是空，返回<tt>true<tt/>
     */
    public static boolean objectnIsNotNull(Object obj) {
        return !objectIsNull(obj);
    }

    /**
     * 集合是空或者个数小于零，返回<tt>true<tt/>
     */
    public static boolean collectionIsEmpty(Collection collection) {
        return null == collection || (collection.size() <= 0);
    }

    /**
     * 集合不是空并且个数大于零，返回<tt>true<tt/>
     */
    public static boolean collectionIsNotEmpty(Collection collection) {
        return !collectionIsNull(collection);
    }

    /**
     * Map是空或者个数小于零，返回<tt>true<tt/>
     */
    public static boolean mapIsEmpty(Map map) {
        return null == map || (map.size() <= 0);
    }

    /**
     * map不是空并且个数大于零，返回<tt>true<tt/>
     */
    public static boolean mapIsNotEmpty(Map map) {
        return !mapIsEmpty(map);
    }

    /**
     * CharSequence是空或者长度小于零，返回<tt>true<tt/>
     */
    public static boolean charSequenceIsEmpty(CharSequence charSequence) {
        return null == charSequence || (charSequence.length() <= 0);
    }

    /**
     * CharSequence不是空并且长度大于零，返回<tt>true<tt/>
     */
    public static boolean charSequenceIsNotEmpty(CharSequence charSequence) {
        return !charSequenceIsEmpty(charSequence);
    }

}

 

yexiangyang

moyyexy@gmail.com

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