版本号比较[versionCompare]

ゝ一世哀愁。 2022-05-14 02:16 169阅读 0赞

/*** * 版本号比较 * @param v1 版本号a * @param v2 版本号b * @return -1代表不是合格版本号；0代表一样大、1 代表版本号a大于版本号b、2代表版本号b大于版本号a */
        public static Integer versionCompare(String v1,String v2){
            Pattern pattern = Pattern.compile("\\d+(\\.\\d+)*");
            if(!(pattern.matcher(v1).matches()) || !(pattern.matcher(v2).matches())){
                //非合格版本号
                return -1;
            }
            String[] s1=v1.split("\\.");
            String[] s2=v2.split("\\.");
    
            //最小数组长度
            int length = s1.length < s2.length ? s1.length : s2.length;
    
            for (int i=0;i <length;i++){
                int diff = Integer.valueOf(s1[i]) - Integer.valueOf(s2[i]);
                if(diff == 0){
                    continue;
                }else {
                    // 1 参数a大于参数b 、2 参数a小于参数b
                    return diff > 0 ? 1:2;
                }
            }
    
            //【特殊情况】
            String[] s3 = new String[]{};
            Integer ben = 0;
            Integer end = 0;
            Integer flag = 0;
            if(s1.length > s2.length){
                s3 = s1;
                ben = s2.length;
                end = s1.length;
                flag = 1;
    
            }
            if(s2.length > s1.length){
                s3 = s2;
                ben = s1.length;
                end = s2.length;
                flag = 2;
            }
            if(s3.length > 0){
                for (int j=ben;j <end;j++){
                    int s3Val = Integer.valueOf(s3[j]);
                    if(s3Val > 0){
                        return flag;
                    }
                }
            }
    
            //一样大
            return 0;
    
        }

测试：

System.out.println(ToolUtils.versionCompare("10.0.0","10.0.0"));//0
       System.out.println(ToolUtils.versionCompare("10.0.0","10.0.1"));//2
       System.out.println(ToolUtils.versionCompare("10.0.0","10.0"));//0
       System.out.println(ToolUtils.versionCompare("10.0.0","a.0"));//-1
       System.out.println(ToolUtils.versionCompare("9.6.0","9.0.61"));//1