(5)正規表現——Java

import java.util.regex.Matcher; import java.util.regex.Pattern; public class ReTest { //        ： public static void main(String args[]){ //1、         matches() //   Java  ,           Pattern pattern1=Pattern.compile("^Java.*"); Matcher matcher1=pattern1.matcher("Java   "); boolean b=matcher1.matches(); System.out.println(b);//true //2、          split() Pattern pattern2=Pattern.compile("[,|]+"); String[] strs=pattern2.split("Java Hello World Java,Hello,,World|Sun"); for(int i=0;i<strs.length;i++){ System.out.print(strs[i]+" "); }//Java Hello World Java Hello World Sun System.out.println(); //3、    （      ）replaceFirst() Pattern pattern3 = Pattern.compile("     "); Matcher matcher3 = pattern3.matcher("      Hello World,      Hello World"); //             System.out.println(matcher3.replaceFirst("Java")); //Java Hello World,      Hello World //4、    （  ）replaceAll() Pattern pattern4 = Pattern.compile("     "); Matcher matcher4 = pattern4.matcher("      Hello World,      Hello World"); //            System.out.println(matcher4.replaceAll("Java")); //Java Hello World,Java Hello World //5、    （    ）appendReplacement()、appendTail() Pattern pattern5 = Pattern.compile("     "); Matcher matcher5 = pattern5.matcher("      Hello World,      Hello World "); StringBuffer sbr = new StringBuffer(); while (matcher5.find()) { matcher5.appendReplacement(sbr, "Java"); } System.out.println(sbr);//Java Hello World,Java matcher5.appendTail(sbr); System.out.println(sbr);//Java Hello World,Java Hello World //6、          String str="[email protected]"; //Pattern.CASE_INSENSITIVE：        Pattern pattern6 = Pattern.compile("[\\w[.-]]+@[\\w[.-]]+\\.[\\w]+",Pattern.CASE_INSENSITIVE); Matcher matcher6 = pattern6.matcher(str); System.out.println(matcher6.matches()); //true //7、  html   //+?     ，Pattern.DOTALL：        Pattern pattern7 = Pattern.compile("<.+?>", Pattern.DOTALL); Matcher matcher7=pattern7.matcher("<a href=\"index.html\">  </a>"); String string = matcher7.replaceAll(""); System.out.println(string);//   //8、  html         //（）    ,0          ，1       Pattern pattern8 = Pattern.compile("href=\"(.+?)\""); Matcher matcher8 = pattern8.matcher("<a href=\"index.html\">  </a>"); if(matcher8.find()){//     System.out.println(matcher8.group(0));//href="index.html" System.out.println(matcher8.group(1));//index.html } //9、  http://   Pattern pattern9 = Pattern.compile("(http://|https://){1}[\\w[.-/]:]+"); Matcher matcher9 = pattern9.matcher("dsdsds<http://dsds//gfgffdfd>fdf"); StringBuffer buffer = new StringBuffer(); while(matcher9.find()){ buffer.append(matcher9.group()); buffer.append("\r
");  } System.out.println(buffer.toString());//http://dsds//gfgffdfd //10、    {}    String st = "Java        {0} -{1} "; String[][] object={new String[]{"\\{0\\}","1995"},new String[]{"\\{1\\}","2007"}}; for(int i=0;i<object.length;i++){ String[] result=object[i]; Pattern pattern = Pattern.compile(result[0]); Matcher matcher = pattern.matcher(st); st=matcher.replaceAll(result[1]); } System.out.println(st); } }