java字符替换函数（面试必考）

  java中用指定的字符串替换指定的字符串

public class StringReplacer
{
    private String str;

    public StringReplacer(String src, String before, String after) {
	   str = replaceString(src, before, after);
    }

    public String toString() {
	   return str;
    }

    public static String replaceString(String src,String before,String after) {
	  StringBuffer sb = new StringBuffer();
	  int oldidx = 0;
	  int idx = src.indexOf(before);
	  while (idx != -1) {
	    sb.append(src.substring(oldidx, idx)).append(after);
	    oldidx = idx + before.length();
	    idx = src.indexOf(before, oldidx);
	  }
	  if (oldidx < src.length())
	    sb.append(src.substring(oldidx));
	  return sb.toString();
    }
}

评论

1 楼 yanyan_zhl 2011-01-15  

貌似是spring源码里面的代码