java 多个小数点比较大小

亦凉 2022-12-02 15:10 124阅读 0赞

# #

public static void main(String[] args) {
            System.out.println(versionCompare("1.0.1","1.0.1.1"));
            System.out.println(versionCompare("1.0.1","1.0.1.0"));
            System.out.println(versionCompare("1.0.1","1.0.2"));
            System.out.println(versionCompare("1.0.3","1.0.2"));
    
    }
    
      /**
         *  ver1 > ver2 = 1
         *  ver1 = ver2 = 0
         *  ver1 < ver2 = -1
         * @param ver1
         * @param ver2
         * @return
         */
        public static int versionCompare(String ver1, String ver2){
            if(ver1.equals(ver2)){
                return 0;
            }
            String[] verArr1 = ver1.split("\\.");
            String[] verArr2 = ver2.split("\\.");
            int maxflag = 1;
            int minLen = 0;
            if(verArr1.length > verArr2.length){
                minLen = verArr2.length;
            }else{
                minLen = verArr1.length;
                maxflag = 2;
            }
            for(int i = 0; i < minLen; i++){
                if(Integer.valueOf(verArr1[i]) - Integer.valueOf(verArr2[i]) > 0){
                    return 1;
                }else if(Integer.valueOf(verArr1[i]) - Integer.valueOf(verArr2[i]) < 0){
                    return -1;
                }
            }
            if(maxflag == 1){
                for (int j = minLen; j < verArr1.length; j++) {
                    if(Integer.valueOf(verArr1[j]).intValue() > 0){
                        return 1;
                    }
                }
            }else{
                for (int k = minLen; k < verArr2.length; k++) {
                    if(Integer.valueOf(verArr2[k]).intValue() > 0){
                        return -1;
                    }
                }
            }
            return 0;
        }

## 输出 ##

![20200831180906743.png][]

[20200831180906743.png]: /images/20221123/5b01787f92964c4c9882d063c95a570c.png