1.数组合并同时删除相同的元素2.删除数组某些元素

/** * 合并两个字符串去除重复的值（字符串必须以,分割） * * @param aStr * @param bStr * @return */private String mergeString(String aStr, String bStr) {    if (aStr == null || bStr == null) {        return null;    }    String[] aArr = aStr.split(",");    String[] bArr = bStr.split(",");    Set<String> set = Sets.newHashSet();    set.addAll(Arrays.asList(aArr));    set.addAll(Arrays.asList(bArr));    return Arrays.toString(set.toArray());}/** * 从targetStr中删除cutStr中的值（字符串必须以,分割） * * @param targetStr * @param cutStr * @return */private String cutString(String targetStr, String cutStr) {    if (targetStr == null || cutStr == null) {        return null;    }    String[] tarArr = targetStr.split(",");    String[] cutArr = cutStr.split(",");    Set<String> set = Sets.newHashSet();    set.addAll(Arrays.asList(tarArr));    set.removeAll(Arrays.asList(cutArr));    return Arrays.toString(set.toArray());}