com.github.yulichang.toolkit.VersionUtils Maven / Gradle / Ivy

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An enhanced toolkit of Mybatis-Plus to simplify development.

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package com.github.yulichang.toolkit;

/**
 * 版本工具类
 *
 * @author yulichang
 * @since 1.4.4
 */
public class VersionUtils {

    public static int compare(String v1, String v2) {
        String[] v1s = v1.split("\\.");
        String[] v2s = v2.split("\\.");

        String[] vs = v1s.length > v2s.length ? v2s : v1s;
        for (int i = 0; i < vs.length; i++) {
            int compareV = compareV(v1s[i], v2s[i]);
            if (compareV != 0) {
                return compareV;
            }
        }
        if (v1s.length == v2s.length) {
            return 0;
        }
        return v1s.length > v2s.length ? 1 : -1;
    }

    private static int compareV(String v1, String v2) {
        if (isNumber(v1)) {
            if (isNumber(v2)) {
                return Integer.valueOf(v1).compareTo(Integer.valueOf(v2));
            } else {
                return 1;
            }
        } else {
            if (isNumber(v2)) {
                return -1;
            } else {
                return v1.compareTo(v2);
            }
        }
    }

    private static boolean isNumber(String str) {
        try {
            Integer.parseInt(str);
            return true;
        } catch (NumberFormatException e2) {
            return false;
        }
    }
}