Java 프로그래밍에서 정규 표현식의 기본 방법 사용하기

// Java , 
 Pattern pattern = Pattern.compile("^Java.*");
 Matcher matcher = pattern.matcher("Java ");
 boolean b= matcher.matches();
 // ， true， false
 System.out.println(b);

Pattern pattern = Pattern.compile("[, |]+");
String[] strs = pattern.split("Java Hello World Java,Hello,,World|Sun");
for (int i=0;i<strs.length;i++) {
  System.out.println(strs[i]);
} 

Pattern pattern = Pattern.compile(" ");
Matcher matcher = pattern.matcher("  Hello World,  Hello World");
// 
System.out.println(matcher.replaceFirst("Java"));

Pattern pattern = Pattern.compile(" ");
Matcher matcher = pattern.matcher("  Hello World,  Hello World");
// 
System.out.println(matcher.replaceAll("Java"));

Pattern pattern = Pattern.compile(" ");
Matcher matcher = pattern.matcher("  Hello World,  Hello World ");
StringBuffer sbr = new StringBuffer();
while (matcher.find()) {
  matcher.appendReplacement(sbr, "Java");
}
matcher.appendTail(sbr);
System.out.println(sbr.toString());

String str="[email protected]";
Pattern pattern = Pattern.compile("[\\w\\.\\-]+@([\\w\\-]+\\.)+[\\w\\-]+",Pattern.CASE_INSENSITIVE);
Matcher matcher = pattern.matcher(str);
System.out.println(matcher.matches());

Pattern pattern = Pattern.compile("<.+?>", Pattern.DOTALL);
Matcher matcher = pattern.matcher("<a href=\"index.html\"> </a>");
String string = matcher.replaceAll("");
System.out.println(string);

Pattern pattern = Pattern.compile("href=\"(.+?)\"");
Matcher matcher = pattern.matcher("<a href=\"index.html\"> </a>");
if(matcher.find())
 System.out.println(matcher.group(1));
}

// url
Pattern pattern = Pattern.compile("(http://|https://){1}[\\w\\.\\-/:]+");
Matcher matcher = pattern.matcher("dsdsds<http://dsds//gfgffdfd>fdf");
StringBuffer buffer = new StringBuffer();
while(matcher.find()){       
  buffer.append(matcher.group());    
  buffer.append("\r
");       
System.out.println(buffer.toString());
}

String str = "Java {0} -{1} ";
String[][] object={new String[]{"\\{0\\}","1995"},new String[]{"\\{1\\}","2007"}};
System.out.println(replace(str,object));

public static String replace(final String sourceString,Object[] object) {
      String temp=sourceString;  
      for(int i=0;i<object.length;i++){
           String[] result=(String[])object[i];
        Pattern  pattern = Pattern.compile(result[0]);
        Matcher matcher = pattern.matcher(temp);
        temp=matcher.replaceAll(result[1]);
      }
      return temp;
}

 // 
    private ArrayList files = new ArrayList();
    // 
    private String _path;
    // 
    private String _regexp;
    
    class MyFileFilter implements FileFilter {

       /**
        *  
        */
       public boolean accept(File file) {
        try {
         Pattern pattern = Pattern.compile(_regexp);
         Matcher match = pattern.matcher(file.getName());        
         return match.matches();
        } catch (Exception e) {
         return true;
        }
       }
      }
    
    /**
     *  
     * @param inputs
     */
    FilesAnalyze (String path,String regexp){
      getFileName(path,regexp);
    }
    
    /**
     *  files
     * @param input
     */
    private void getFileName(String path,String regexp) {
      // 
       _path=path;
       _regexp=regexp;
       File directory = new File(_path);
       File[] filesFile = directory.listFiles(new MyFileFilter());
       if (filesFile == null) return;
       for (int j = 0; j < filesFile.length; j++) {
        files.add(filesFile[j]);
       }
       return;
      }
  
    /**
     *  
     * @param out
     */
    public void print (PrintStream out) {
      Iterator elements = files.iterator();
      while (elements.hasNext()) {
        File file=(File) elements.next();
          out.println(file.getPath());  
      }
    }

    public static void output(String path,String regexp) {

      FilesAnalyze fileGroup1 = new FilesAnalyze(path,regexp);
      fileGroup1.print(System.out);
    }
  
    public static void main (String[] args) {
      output("C:\\","[A-z|.]*");
    }