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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