Java中的模式CANON_EQ字段和示例
仅当两个字符规范相等时，Pattern类的CANON_EQ字段才匹配两个字符。当将此值用作compile()方法的标志值时，两个字符将被匹配，且仅当它们的完全规范分解相等时才匹配。
规范分解是Unicode文本规范化形式之一
例子1
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class CANON_EQ_Example {
public static void main( String args[] ) {
String regex = "b\u0307";
//编译正则表达式
Pattern pattern = Pattern.compile(regex, Pattern.CANON_EQ);
//检索匹配器对象
Matcher matcher = pattern.matcher("\u1E03");
if(matcher.matches()) {
System.out.println("Match found");
} else {
System.out.println("Match not found");
}
}
}输出结果
Match found
例子2
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class CANON_EQ_Example {
public static void main( String args[] ) {
String regex = "a\u030A";
//编译正则表达式
Pattern pattern = Pattern.compile(regex, Pattern.CANON_EQ);
//检索匹配器对象
String [] input = {"\u00E5", "a\u0311", "a\u0325", "a\u030A", "a\u1E03", "a\uFB03" };
for (String ele : input) {
Matcher matcher = pattern.matcher(ele);
if(matcher.matches()) {
System.out.println(ele+" is a match for "+regex);
} else {
System.out.println(ele+" is not a match for "+regex);
}
}
}
}输出结果
å is a match for a? a? is not a match for a? a? is not a match for a? a? is a match for a? a? is not a match for a? a? is not a match for a?