/***
* 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