淘宝短链解析

yujian

2019-10-11 976e5b59b00c8ea661f555a483109e3f5faf5fd5

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package org.yeshi.utils; 
 
import java.util.ArrayList; 
import java.util.List; 
 
public class ListUtil { 
    /** 
     * 求交集 
     *  
     * @param list1 
     * @param list2 
     * @return 
     */ 
    public static List<String> getIntersection(List<String> list1, List<String> list2) { 
        List<String> targetList = new ArrayList<>(); 
        targetList.addAll(list1); 
        targetList.retainAll(list2); 
        return targetList; 
    } 
 
    /** 
     * 求差集 
     *  
     * @param list1 
     * @param list2 
     * @return 
     */ 
    public static List<String> getDifference(List<String> list1, List<String> list2) { 
        List<String> targetList = new ArrayList<>(); 
        if (list1.size() >= list2.size()) { 
            targetList.addAll(list1); 
            targetList.removeAll(list2); 
 
        } else { 
            targetList.addAll(list2); 
            targetList.removeAll(list1); 
        } 
 
        return targetList; 
    } 
}