import java.util.regex.*;
public class StringBuffer{
public static void main(String args[]){
String str="123张三123王123";
String s1=str+"aaa"+"vvv"+"cccc";
StringBuffer buffer=new StringBuffer();
buffer.append(str);
buffer.append("aaa");
buffer.append("vvv");
buffer.append("cccc");
System.out.println("flags==="+buffer.toString());
}
}
