java 正则表达式基础，实例学习资料收集大全

//查找以Java开头,任意结尾的字符串

Pattern pattern = Pattern.compile( "^Java.*" );

Matcher matcher = pattern.matcher( "Java不是人" );

boolean b = matcher.matches(); //当条件满足时，将返回true，否则返回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( "正则表达式" );

Matcher matcher = pattern.matcher( "正则表达式 Hello World,正则表达式 Hello World" ); //替换第一个符合正则的数据

System.out.println(matcher.replaceFirst( "Java" ));

Pattern pattern = Pattern.compile( "正则表达式" );

Matcher matcher = pattern.matcher( "正则表达式 Hello World,正则表达式 Hello World" ); //替换第全部符合正则的数据

System.out.println(matcher.replaceAll( "Java" ));

Pattern pattern = Pattern.compile( "正则表达式" );

Matcher matcher = pattern.matcher( "正则表达式 Hello World,正则表达式 Hello World " );

StringBuffer sbr = new StringBuffer();

while (matcher.find()) {

  matcher.appendReplacement(sbr, "Java" );

}

matcher.appendTail(sbr);

System.out.println(sbr.toString());

String str= "ceponline@yahoo.com.cn" ;

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\">主页</ a >");

String string = matcher.replaceAll("");

System.out.println(string);

Pattern pattern = Pattern.compile( "href=\"(.+?)\"" );

Matcher matcher = pattern.matcher( "<a href=\"index.html\">主页</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\n" );

      System.out.println(buffer.toString());

}

String str = "Java目前的发展史是由{0}年-{1}年" ;

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(); // 用于承载文件路径

private String _path; // 用于承载未合并的正则公式

private String _regexp;

class MyFileFilter implements FileFilter {

     /** * 匹配文件名称 */

     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 ;

         }

     }

}

/** * 解析输入流 * @param inputs */

FilesAnalyze(String path, String regexp) {

     getFileName(path, regexp);

}

/** * 分析文件名并加入files * @param input */

private void getFileName(String path, String regexp) { // 目录

     _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 ;

}

/** * 显示输出信息 * @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|.]*" );

}