Java 정규 표현식 기능 및 응용

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

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

 
Pattern pattern = Pattern.compile("Java "); 
Matcher matcher = pattern.matcher("Java  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; 
}