Java 正则表达式示例

package test.com;

import static org.junit.Assert.*;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.junit.Test;
/**
 * Unit Test for domain regular expression
 * @author Joe
 */
public class DomainRegexTester {

    private final static Pattern mainDomainPattern = Pattern.compile("(m\\.)?((www|en|pt|es|ru)\\.)?okchem\\.com");

    private final static Pattern vipDomainPattern = Pattern.compile("(\\w{3,30})\\.(m\\.)?((en|pt|es|ru)\\.)okchem\\.com");

    public static boolean match(String regex, String text) {
        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(text);

        return matcher.matches();
    }

    @Test
    public void testMatchGroup_NonVIP_PC() {        
        Matcher pcMatcherWww = mainDomainPattern.matcher("www.okchem.com");
        if(pcMatcherWww.find()) {
            assertTrue("www".equals(pcMatcherWww.group(3)));
            assertTrue("www.".equals(pcMatcherWww.group(2)));
        }

        Matcher pcMatcherEn = mainDomainPattern.matcher("en.okchem.com");
        if(pcMatcherEn.find()) {
            assertTrue(pcMatcherEn.group(1)==null);
            assertTrue("en".equals(pcMatcherEn.group(3)));
        }


        Matcher mobileMatcherEn = mainDomainPattern.matcher("m.okchem.com");
        if(mobileMatcherEn.find()) {
            assertTrue("m.".equals(mobileMatcherEn.group(1)));
        } 

        Matcher mobileMatcherEs = mainDomainPattern.matcher("m.es.okchem.com");
        if(mobileMatcherEs.find()) {
            assertTrue("es".equals(mobileMatcherEs.group(3)));
            assertTrue("es.".equals(mobileMatcherEs.group(2)));
        }  

    }


    @Test
    public void testMainDomainMatch() {        
       assertTrue(matchMain("www.okchem.com"));
       assertTrue(matchMain("pt.okchem.com"));
       assertTrue(matchMain("es.okchem.com"));
       assertTrue(matchMain("pt.okchem.com"));
       assertTrue(matchMain("ru.okchem.com"));

       assertTrue(matchMain("m.okchem.com"));
       assertTrue(matchMain("m.pt.okchem.com"));
       assertTrue(matchMain("m.es.okchem.com"));
       assertTrue(matchMain("m.ru.okchem.com"));      

       assertTrue(matchMain("m.www.okchem.com"));
       assertFalse(matchMain("m.www.icoding.tech"));
    }

    public void testVipDomainmatch() {
        /*** VIP store domain ***/
        assertTrue(matchVIP("vipcode.ru.okchem.com"));
        assertTrue(matchVIP("vipcode.en.okchem.com"));
        assertTrue(matchVIP("vipcode.es.okchem.com"));
        assertTrue(matchVIP("vipcode.pt.okchem.com"));

        assertTrue(matchVIP("vipcode.m.pt.okchem.com"));
        assertTrue(matchVIP("vipcode.m.ru.okchem.com"));
        assertTrue(matchVIP("vipcode.m.en.okchem.com"));
        assertTrue(matchVIP("vipcode.m.es.okchem.com"));

        assertFalse(matchVIP("v.pt.okchem.com"));// vipcode is too short
        assertTrue(matchVIP("abcdefghij12345678901234567980.en.okchem.com"));// vipcode is just 30
        assertFalse(matchVIP("abcdefghij123456789012345679801.pt.okchem.com"));// vipcode is too short

        assertFalse(matchVIP("v.m.pt.okchem.com"));// vipcode is too short
        assertTrue(matchVIP("abcdefghij12345678901234567980.m.pt.okchem.com"));// vipcode is just 30
        assertFalse(matchVIP("abcdefghij123456789012345679801.m.pt.okchem.com"));// vipcode is too short
    }

    public static boolean matchMain(String text) {
        Matcher matcher = mainDomainPattern.matcher(text);
        return matcher.matches();
    }
    public static boolean matchVIP(String text) {
        Matcher matcher = vipDomainPattern.matcher(text);
        return matcher.matches();
    }

}

package test.com;

import static org.junit.Assert.*;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.junit.Test;
/**
 * Unit Test for domain regular expression
 * @author Joe
 */
public class DomainRegexTester {

    private final static Pattern pattern = Pattern.compile("(\\w{3,30}\\.)?(m\\.)?((www|en|pt|es|ru)\\.)?okchem\\.com");


    public static boolean match(String regex, String text) {
        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(text);

        return matcher.matches();
    }

    @Test
    public void testMatchGroup_NonVIP_PC() {        
        Matcher matcher1 = pattern.matcher("www.okchem.com");
        if(matcher1.find()) {
            assertTrue("www.".equals(matcher1.group(1)));
            assertTrue(matcher1.group(2)==null);
            assertTrue(matcher1.group(3)==null);
            assertTrue(matcher1.group(4)==null);
        }

        Matcher matcher2 = pattern.matcher("en.okchem.com");
        if(matcher2.find()) {
            assertTrue("en".equals(matcher2.group(4)));
            assertTrue(matcher2.group(2)==null);
            assertTrue("en.".equals(matcher2.group(3)));
        }
    }
    @Test
    public void testMatchGroup() {        
        Matcher matcher = pattern.matcher("www.okchem.com");
        if(matcher.find()) {
            assertTrue("www.".equals(matcher.group(1)));
            assertTrue(matcher.group(2)==null);
            assertTrue(matcher.group(3)==null);
        }
    }

    @Test
    public void testParseLanguage_NonLanguage() throws Exception {        
        assertTrue(parseLanguageFromText("www.okchem.com")==null);
        assertTrue(parseLanguageFromText("m.okchem.com")==null);
    }
    @Test
    public void testParseLanguage_HasLanguage() throws Exception {        
        assertTrue("pt".equals(parseLanguageFromText("pt.okchem.com")));
        assertTrue("pt".equals(parseLanguageFromText("m.pt.okchem.com")));
        assertTrue("ru".equals(parseLanguageFromText("vipcode.ru.okchem.com")));
        assertTrue("pt".equals(parseLanguageFromText("vipcode.m.pt.okchem.com")));
    }

    @Test
    public void testDomainMatch() {        
       assertTrue(match("www.okchem.com"));
       assertTrue(match("pt.okchem.com"));
       assertTrue(match("es.okchem.com"));
       assertTrue(match("pt.okchem.com"));
       assertTrue(match("ru.okchem.com"));

       assertTrue(match("m.okchem.com"));
       assertTrue(match("m.pt.okchem.com"));
       assertTrue(match("m.es.okchem.com"));
       assertTrue(match("m.ru.okchem.com"));

       /*** VIP store domain ***/

       assertTrue(match("vipcode.ru.okchem.com"));
       assertTrue(match("vipcode.en.okchem.com"));
       assertTrue(match("vipcode.es.okchem.com"));
       assertTrue(match("vipcode.pt.okchem.com"));

       assertTrue(match("vipcode.m.pt.okchem.com"));
       assertTrue(match("vipcode.m.ru.okchem.com"));
       assertTrue(match("vipcode.m.en.okchem.com"));
       assertTrue(match("vipcode.m.es.okchem.com"));   

       assertFalse(match("vi.pt.okchem.com"));// vipcode is too short      
       assertTrue(match("abcdefghij12345678901234567980.en.okchem.com"));// vipcode is just 30
       assertFalse(match("abcdefghij123456789012345679801.pt.okchem.com"));// vipcode is too short

       assertFalse(match("vi.m.pt.okchem.com"));// vipcode is too short       
       assertTrue(match("abcdefghij12345678901234567980.m.pt.okchem.com"));// vipcode is just 30
       assertFalse(match("abcdefghij123456789012345679801.m.pt.okchem.com"));// vipcode is too short

       assertTrue(match("m.www.okchem.com"));
       assertFalse(match("m.www.icoding.tech"));
    }

    public static boolean match(String text) {
        Matcher matcher = pattern.matcher(text);
        return matcher.matches();
    }

    public static String parseLanguageFromText(String text) throws Exception {
        Matcher matcherPc = pattern.matcher(text);
        if(matcherPc.find()) {
            return matcherPc.group(4);
        }
        throw new Exception("Not Match");
    }

}