Java 中 Pattern MULTILINE 字段及其示例
一般情况下启用多行模式,无论其中包含多少行,元字符 ^ 和 $ 都匹配指定字符开头和结尾。
示例 1
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class MULTILINE_Example {
public static void main( String args[] ) {
//String regex = "(^This)";//.*t$)";
String input = "2234 This is a sample text\n"
+ "1424 This second 2335 line\n"
+ "This id third 455 line\n"
+ "Welcome to Tutorialspoint\n";
Pattern pattern = Pattern.compile("^([0-9]+).*");//, Pattern.MULTILINE);
Matcher matcher = pattern.matcher(input);
while(matcher.find()) {
System.out.println(matcher.group(1));
}
}
}
输出
2234
当您将这用作 compile() 方法的标志值时,整个输入序列都将被视为单行,元字符 ^ 和 $ 匹配给定输入序列的开头和结尾。
示例 2
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class MULTILINE_Example {
public static void main( String args[] ) {
//String regex = "(^This)";//.*t$)";
String input = "2234 This is a sample text\n"
+ "1424 This second 2335 line\n"
+ "This id third 455 line\n"
+ "Welcome to Tutorialspoint\n";
Pattern pattern = Pattern.compile("^([0-9]+).*", Pattern.MULTILINE);
Matcher matcher = pattern.matcher(input);
while(matcher.find()) {
System.out.println(matcher.group(1));
}
}
}
输出
2234 1424
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