sunnywang

import java.util.regex.*;

            public class Replacement{
            public static void main(String[] args) throws Exception {
            // 生成一个Pattern,同时编译一个正则表达式
            Pattern p = Pattern.compile("[/]+");
            //用Pattern的split()方法把字符串按"/"分割
            String[] result = p.split(
            "Kevin has seen《LEON》seveal times,because it is a good film."
            +"/ 凯文已经看过《这个杀手不太冷》几次了，因为它是一部"
            +"好电影。/名词:凯文。");
            for (int i=0; i<result.length; i++)
            System.out.println(result[i]);
            }
            }
            

//该例将把句子里的"Kelvin"改为"Kevin"
            import java.util.regex.*;
            public class MatcherTest{
            public static void main(String[] args)
            throws Exception {
            //生成Pattern对象并且编译一个简单的正则表达式"Kelvin"
            Pattern p = Pattern.compile("Kevin");
            //用Pattern类的matcher()方法生成一个Matcher对象
            Matcher m = p.matcher("Kelvin Li and Kelvin Chan are both working 
in Kelvin Chen's KelvinSoftShop company");
            StringBuffer sb = new StringBuffer();
            int i=0;
            //使用find()方法查找第一个匹配的对象
            boolean result = m.find();
            //使用循环将句子里所有的kelvin找出并替换再将内容加到sb里
            while(result) {
            i++;
            m.appendReplacement(sb, "Kevin");
            System.out.println("第"+i+"次匹配后sb的内容是："+sb);
            //继续查找下一个匹配对象
            result = m.find();
            }
            //最后调用appendTail()方法将最后一次匹配后的剩余字符串加到sb里；
            m.appendTail(sb);
            System.out.println("调用m.appendTail(sb)后sb的最终内容是:"+ sb.toString());
            }
            }

import java.util.regex.*;
            public class GroupTest{
            public static void main(String[] args)
            throws Exception {
            Pattern p = Pattern.compile("(ca)(t)");
            Matcher m = p.matcher("one cat,two cats in the yard");
            StringBuffer sb = new StringBuffer();
            boolean result = m.find();
            System.out.println("该次查找获得匹配组的数量为："+m.groupCount());
            for(int i=1;i<=m.groupCount();i++){
            System.out.println("第"+i+"组的子串内容为： "+m.group(i));
            }
            }
            }

import java.util.regex.*;
            public class Email {
            public static void main(String[] args) throws Exception {
            String input = args[0];
            //检测输入的EMAIL地址是否以 非法符号"."或"@"作为起始字符
            Pattern p = Pattern.compile("^\\.|^\\@");
            Matcher m = p.matcher(input);
            if (m.find()){
            System.err.println("EMAIL地址不能以'.'或'@'作为起始字符");
            }
            //检测是否以"www."为起始
            p = Pattern.compile("^www\\.");
            m = p.matcher(input);
            if (m.find()) {
            System.out.println("EMAIL地址不能以'www.'起始");
            }
            //检测是否包含非法字符
            p = Pattern.compile("[^A-Za-z0-9\\.\\@_\\-~#]+");
            m = p.matcher(input);
            StringBuffer sb = new StringBuffer();
            boolean result = m.find();
            boolean deletedIllegalChars = false;
            while(result) {
            //如果找到了非法字符那么就设下标记
            deletedIllegalChars = true;
            //如果里面包含非法字符如冒号双引号等，那么就把他们消去，加到SB里面
            m.appendReplacement(sb, "");
            result = m.find();
            }
            m.appendTail(sb);
            input = sb.toString();
            if (deletedIllegalChars) {
            System.out.println("输入的EMAIL地址里包含有冒号、逗号等非法字符，请修改");
            System.out.println("您现在的输入为: "+args[0]);
            System.out.println("修改后合法的地址应类似: "+input);
            }
            }
            }