java正则表达式检查字符串是否匹配，java正则表达式,package cn.o

java正则表达式检查字符串是否匹配，java正则表达式,package cn.o

package cn.outofmemory.snippets.core;import java.util.regex.Matcher;import java.util.regex.Pattern;public class CheckIfAStringMatchesAPattern {    public static void main(String[] args) {        String patternStr = "test";        Pattern pattern = Pattern.compile(patternStr);        String input = "this fails";        // create a matcher that will match the given input against this pattern        Matcher matcher = pattern.matcher(input);        boolean matchFound = matcher.matches();        System.out.println(input + " - matches: " + matchFound);        input = "this passes the test";        // reset the matcher with a new input sequence        matcher.reset(input);        matchFound = matcher.matches();        System.out.println(input + " - matches: " + matchFound);        // Attempts to match the input sequence, starting at the beginning        // of the region, against the pattern        matchFound = matcher.lookingAt();        System.out.println(input + " - matches from the beginning: " + matchFound);    }}

输出：

this fails - matches: falsethis passes the test - matches: falsethis passes the test - matches from the beginning: false