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版本号比较工具类

秦瑟读书 2022-03-15 阅读 78
/**
 * 比较版本号的大小 (两个版本号格式应尽量相同)
 *
 * @param v1 版本号1
 * @param v2 版本号2
 * @return 正数:v1大   负数:v2大  0:相等
 */
public static int checkVersion(String v1, String v2) {
    String[] verArr1 = v1.split("\\.");
    String[] verArr2 = v2.split("\\.");
    int idx = 0;
    int minLength = Math.min(verArr1.length, verArr2.length);
    int diff = 0;
    while (idx < minLength
            && (diff = verArr1[idx].length() - verArr2[idx].length()) == 0
            && (diff = verArr1[idx].compareTo(verArr2[idx])) == 0) {
        ++idx;
    }
    diff = (diff != 0) ? diff : verArr1.length - verArr2.length;
    return diff;
}
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