replaceall.java

一个用jsp技术实现的新闻发布系统

package net.ijsp.news.util;

/**
*  Title  字符替换函数
*  @author: ccjsmile
*  Company: http://www.ijsp.net
*  Copyright: Copyright (c) 2003
*  @version 1.0 beta
*/

public class ReplaceAll {

	/**
	* 字符替换函数（JDK1.4那个有点bug，没有采用）
	* @param String,String,String 
	* @return String
	*/
   public static String replace(String source,String oldString,String newString) {
    if(source == null) 
		return null;
    StringBuffer output = new StringBuffer();
	    int lengOfsource = source.length();
		int lengOfold = oldString.length();
		int posStart = 0;
		int pos;
			while((pos = source.indexOf(oldString,posStart)) >= 0) {
		      output.append(source.substring(posStart,pos));
		      output.append(newString);
		      posStart = pos + lengOfold;
			}
	    if(posStart < lengOfsource) {
		  output.append(source.substring(posStart));
		}
	    return output.toString();
  }

}