자바 정규 표현 식 기초,인 스 턴 스 학습 자료 수집 대전<br>오리지널

//   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)); 
}

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|.]*");
	}