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简化获取ip范围代码

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田金成 2025-03-26 19:03:41 +08:00
parent d254f7670d
commit 7f4ed213ac
1 changed files with 6 additions and 28 deletions
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34
hutool-core/src/main/java/cn/hutool/core/net/Ipv4Util.java
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@ -115,37 +115,15 @@ public class Ipv4Util {
public static List<String> list(String ipFrom, String ipTo) {
// 确定ip数量
final int count = countByIpRange(ipFrom, ipTo);
final int[] from = Convert.convert(int[].class, StrUtil.splitToArray(ipFrom, CharUtil.DOT));
final int[] to = Convert.convert(int[].class, StrUtil.splitToArray(ipTo, CharUtil.DOT));
long ipFromLong = ipv4ToLong(ipFrom);
final List<String> ips = new ArrayList<>(count);
// 是否是循环的第一个值
boolean aIsStart = true, bIsStart = true, cIsStart = true;
// 是否是循环的最后一个值
boolean aIsEnd, bIsEnd, cIsEnd;
// 循环的结束值
int aEnd = to[0], bEnd, cEnd, dEnd;
for (int a = from[0]; a <= aEnd; a++) {
aIsEnd = (a == aEnd);
// 本次循环的结束结束值
bEnd = aIsEnd ? to[1] : 255;
for (int b = (aIsStart ? from[1] : 0); b <= bEnd; b++) {
// 在上一个循环是最后值的基础上进行判断
bIsEnd = aIsEnd && (b == bEnd);
cEnd = bIsEnd ? to[2] : 255;
for (int c = (bIsStart ? from[2] : 0); c <= cEnd; c++) {
// 在之前循环是最后值的基础上进行判断
cIsEnd = bIsEnd && (c == cEnd);
dEnd = cIsEnd ? to[3] : 255;
for (int d = (cIsStart ? from[3] : 0); d <= dEnd; d++) {
ips.add(a + "." + b + "." + c + "." + d);
}
cIsStart = false;
}
bIsStart = false;
}
aIsStart = false;
for (int i = 0; i < count; i++) {
ips.add(longToIpv4(ipFromLong+i));
}
return ips;
}