java 回车替换换行

//第一种方式
import java.util.regex.Pattern;
import java.util.regex.Matcher;
 
...
// 4 different combinaisons
Pattern CRLF = Pattern.compile("(
|
|
|

)");
Matcher m = CRLF.matcher(myString);
 
if (m.find()) {
  newString = m.replaceAll("<br>");
}
//第二种方式
 
newString = myString.replaceAll("(
|
|
|

)", "<br>");

测试

import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
public class StringTest {
 
	public static String sss(String myString){
		String newString=null;
		Pattern CRLF = Pattern.compile("(
|
|
|

)");
		Matcher m = CRLF.matcher(myString);
		if (m.find()) {
		  newString = m.replaceAll("<br>");
		}
		return newString;
	}
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		String aaa="sdfsfdsfsdf
,dsfsdfsdf
";
		//aaa.replace("s", "x");
		String newStr=sss(aaa);
		System.out.println(newStr);
	}
 
}