文章摘要
文章主要讨论了几个正则表达式，包括IPv4、IPv6、HTTP、域名和空字符串的验证。这些正则表达式被组合成一个统一的正则表达式`finalRegex`，用于匹配合法的网络地址、网页地址和有效域名。文章详细描述了这些正则表达式的结构，并提供了多个测试用例来验证它们的正确性。这些测试用例涵盖了IPv4的前缀长度、IPv6的前缀长度、HTTP/HTTPS链接、域名的有效性和异常情况，以及空字符串的匹配情况。通过这些测试，展示了正则表达式对各种合法和非法输入的识别能力，确保了正则表达式的可靠性和实用性。
import org.junit.Test;
public class IPv6Test {
public static final String ipv4Regex=”(^((22[0-3]丨2[0-1][0-9]|[0-1][0-9][0-9]|0[1 -9][0-9]|([0-9])]{1,2})([.](25[0-5]|2[0-4][0-9]|[0-1][0-9][0-9]|0[1 -9][0-9]|([0-9])]{1,2})){3})$)”;
public static final String ipv6Regex=”(^(([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}{1}|:))|(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}{1}|((22[0-3]丨2[0-1][0-9]|[0-1][0-9][0-9]|0[1 -9][0-9]|([0-9])]{1,2})([.](25[0-5]|2[0-4][0-9]|[0-1][0-9][0-9]|0[1 -9][0-9]|([0-9])]{1,2})){3})|:))|(([0-9A-Fa-f]{1,4}:){5}(:[0-9A-Fa-f]{1,4}{1,2}|:((22[0-3]丨2[0-1][0-9]|[0-1][0-9][0-9]|0[1 -9][0-9]|([0-9])]{1,2})([.](25[0-5]|2[0-4][0-9]|[0-1][0-9][0-9]|0[1 -9][0-9]|([0-9])]{1,2})){3})|:))|(([0-9A-Fa-f]{1,4}:){4}(:[0-9A-Fa-f]{1,4}{1,3}|:((22[0-3]丨2[0-1][0-9]|[0-1][0-9][0-9]|0[1 -9][0-9]|([0-9])]{1,2})([.](25[0-5]|2[0-4][0-9]|[0-1][0-9][0-9]|0[1 -9][0-9]|([0-9])]{1,2})){3})|:))|(([0-9A-Fa-f]{1,4}:){3}(:[0-9A-Fa-f]{1,4}{1,4}|:((22[0-3]丨2[0-1][0-9]|[0-1][0-9][0-9]|0[1 -9][0-9]|([0-9])]{1,2})([.](25[0-5]|2[0-4][0-9]|[0-1][0-9][0-9]|0[1 -9][0-9]|([0-9])]{1,2})){3})|:))|(([0-9A-Fa-f]{1,4}:){2}(:[0-9A-Fa-f]{1,4}{1,5}|:((22[0-3]丨2[0-1][0-9]|[0-1][0-9][0-9]|0[1 -9][0-9]|([0-9])]{1,2})([.](25[0-5]|2[0-4][0-9]|[0-1][0-9][0-9]|0[1 -9][0-9]|([0-9])]{1,2})){3})|:))|(([0-9A-Fa-f]{1,4}:){1}(:[0-9A-Fa-f]{1,4}{1,6}|:((22[0-3]丨2[0-1][0-9]|[0-1][0-9][0-9]|0[1 -9][0-9]|([0-9])]{1,2})([.](25[0-5]|2[0-4][0-9]|[0-1][0-9][0-9]|0[1 -9][0-9]|([0-9])]{1,2})){3})|:))|(:(:[0-9A-Fa-f]{1,4}{1,7}|:((22[0-3]丨2[0-1][0-9]|[0-1][0-9][0-9]|0[1 -9][0-9]|([0-9])]{1,2})([.](25[0-5]|2[0-4][0-9]|[0-1][0-9][0-9]|0[1 -9][0-9]|([0-9])]{1,2})){3})|:))$)”;
public static final String httpRegex=”(^((http|https|HTTP|HTTPS)://.{1,245})$)”;
public static final String domainRegex=”(^(([a-zA-Z0-9](([a-zA-Z0-9]|[-]){0-61}[a-zA-Z0-9])?[.])+[a-zA-Z0-9]{2,6}$)”;
public static final String emptyRegex=”(^$)”;
public static final String finalRegex=ipv4Regex + “|” + ipv6Regex + “|” + httpRegex + “|” + domainRegex + “|” + emptyRegex;
public static void main(String args[]) {
try {
} catch (Exception e) {
e.printStackTrace(System.out);
}
}
// 第一个字段长度为3的测试用例
@Test
public void testIpv4_1() {
assert (“200.255.255.255”.matches(finalRegex));
assert (“223.255.255.255”.matches(finalRegex));
assert (“224.255.255.255”.matches(finalRegex));
assert (“192.0.0.1”.matches(finalRegex));
assert (“127.0.0.1”.matches(finalRegex));
assert (“100.0.0.1”.matches(finalRegex));
assert (“090.0.0.1”.matches(finalRegex));
assert (“009.0.0.1”.matches(finalRegex));
}
// 第一个字段长度为1或2的测试用例
@Test
public void testIpv4_2() {
assert (“09.255.255.255”.matches(finalRegex));
assert (“90.255.255.255”.matches(finalRegex));
assert (“00.255.255.255″.matches(finalRegex));
assert (!”-.0.0.1″.matches(finalRegex));
assert (“0.0.0.1”.matches(finalRegex));
assert (“1.0.0.1”.matches(finalRegex));
}
// 测试后面三个字节
@Test
public void testIpv4_3() {
assert (“200.0.255.255”.matches(finalRegex));
assert (“200.01.255.255”.matches(finalRegex));
assert (“200.10.255.255″.matches(finalRegex));
assert (!”200.256.255.255”.matches(finalRegex));
assert (“200.001.255.255”.matches(finalRegex));
assert (“200.255.0.255”.matches(finalRegex));
assert (“200.255.01.255”.matches(finalRegex));
assert (“200.255.10.255″.matches(finalRegex));
assert (!”200.255.256.255”.matches(finalRegex));
assert (“200.255.001.255”.matches(finalRegex));
assert (“200.255.255.0”.matches(finalRegex));
assert (“200.255.255.01”.matches(finalRegex));
assert (“200.255.255.10″.matches(finalRegex));
assert (!”200.255.255.256”.matches(finalRegex));
assert (“200.255.255.001″.matches(finalRegex));
}
// 测试异常
@Test
public void testIpv4_4() {
assert (!”200″.matches(finalRegex));
assert (!”200.1″.matches(finalRegex));
assert (!”200.1″.matches(finalRegex));
assert (!”200.1.1″.matches(finalRegex));
assert (!”200.1.1.1.1”.matches(finalRegex));
}
@Test
public void testIpv6_1() {
assert (“1:2:3:4:5:6:7::”.matches(finalRegex));
assert (“1:2:3:4:5:6:7:8”.matches(finalRegex));
assert (“1:2:3:4:5:6::”.matches(finalRegex));
assert (“1:2:3:4:5:6::8”.matches(finalRegex));
assert (“1:2:3:4:5::”.matches(finalRegex));
assert (“1:2:3:4:5::8”.matches(finalRegex));
assert (“1:2:3:4::”.matches(finalRegex));
assert (“1:2:3:4::8”.matches(finalRegex));
assert (“1:2:3::”.matches(finalRegex));
assert (“1:2:3::8”.matches(finalRegex));
assert (“1:2::”.matches(finalRegex));
assert (“1:2::8”.matches(finalRegex));
assert (“1::”.matches(finalRegex));
assert (“1::8”.matches(finalRegex));
assert (“::”.matches(finalRegex));
assert (“::8”.matches(finalRegex));
assert (“::7:8”.matches(finalRegex));
assert (“::6:7:8”.matches(finalRegex));
assert (“::5:6:7:8”.matches(finalRegex));
assert (“::4:5:6:7:8”.matches(finalRegex));
assert (“::3:4:5:6:7:8”.matches(finalRegex));
assert (“::2:3:4:5:6:7:8”.matches(finalRegex));
assert (“::192.168.1.1”.matches(finalRegex));
}
@Test
public void testIpv6_2() {
assert (“A:0f:0F:FFFF:5:6:7:8″.matches(finalRegex));
assert (!”A:0f:0F:FFFF1:5:6:7:8″.matches(finalRegex));
assert (!”G:0f:0F:FFFF:5:6:7:8”.matches(finalRegex));
}
@Test
public void testHttp() {
assert (“https://a.com”.matches(finalRegex));
assert (“https://a.b.c.com”.matches(finalRegex));
assert (“https://a”.matches(finalRegex));
assert (“https://a.comdddd”.matches(finalRegex));
assert (!”https://afadfadfadfadfadfadfadfadfadfffffffffffffffffffffffffffffffffffffffffffffffdfadfadfadfadfadfadfadfaafadfadfadfadfadfadfadfadfadfffffffffffffffffffffffffffffffffffffffffffffffdfadfadfadfadfadfadfadfaafadfadfadfadfadfadfadfadfadfffffffffffffffffffffffffffffffffffffffffffffffdfadfadfadfadfadfadfadfa.comdddd”
.matches(finalRegex));
}
@Test
public void testDomain() {
assert (“a.com”.matches(finalRegex));
assert (“a.bdfad-dfadf.c.com”.matches(finalRegex));
assert (!”a.-bdfad-dfadf.c.com”.matches(finalRegex));
assert (“abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWSYZabcdefghijk.com”.matches(finalRegex));
assert (!”abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWSYZabcdefghijk1.com”.matches(finalRegex));
}
@Test
public void testEmpty() {
assert (“”.matches(finalRegex));
assert (!”1″.matches(finalRegex));
}
}