replaceall.java

来自「JSP新闻发布系统 JSP新闻发布系统」· Java 代码 · 共 38 行

package net.ijsp.news.util;

/**
 * <p>Title: 字符替换函数</p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company:ijsp.net </p>
 * @author ccjsmile
 * @version 1.0
 */

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();
  }

}