正则表达式：
[A-Za-z]+[A-Za-z0-9_,"#;.() \s]*[.]$或^([A-Z]){1}[^.]*.
测试代码：
import java.util.regex.Matcher;import java.util.regex.Pattern;public class Contain_Test {public static void main(String[] args) {String example1="I am a handsome boy.";String example2="Where there is a will, there is a way.";String regex="[A-Za-z]+[A-Za-z0-9_,\"#;.() \\s]*[.]$";//匹配一句英文语句。String anotherRegex="^([A-Z]){1}[^.]*.";Pattern pattern=pile(regex);Pattern anotherPattern=pile(anotherRegex);Matcher matcher1=pattern.matcher(example1);Matcher matcher2=pattern.matcher(example2);Matcher matcher3=anotherPattern.matcher(example1);Matcher matcher4=anotherPattern.matcher(example2);boolean result1=matcher1.matches();boolean result2=matcher2.matches();boolean result3=matcher3.matches();boolean result4=matcher4.matches();System.out.println("regex's result:");System.out.println(example1+" =>"+result1);System.out.println(example2+" =>"+result2);System.out.println("anotherRegex's result:");System.out.println(example1+" =>"+result3);System.out.println(example2+" =>"+result4);}}
测试结果：
regex's result:I am a handsome boy. =>trueWhere there is a will, there is a way. =>trueanotherRegex's result:I am a handsome boy. =>trueWhere there is a will, there is a way. =>true
