stringsplitter.java

来自「java web 开发,Java Xml 编程指南书籍源码」· Java 代码 · 共 48 行

package MyNa.utils;


public class StringSplitter{
  // to be used like StringTokenizer, but it can
  // return empty "tokens", and takes only one delim;
  // this may be a character or a string.
  String theString; char theDelim; int thePos;
  String theDelimStr=null; int theDelimLength;
  // nextToken is the token beginning at thePos

  public StringSplitter(String S,char d,int p){
    theString=S; theDelim=d; thePos=p; theDelimLength=1;
    if(thePos>=theString.length())thePos=-1;
    }

  public StringSplitter(String S,char d){this(S,d,0);}

  public StringSplitter(String S,String d,int p){
    theString=S; theDelimStr=d; thePos=p;
    theDelimLength=d.length();
    if(thePos>=theString.length())thePos=-1;
    }

  public StringSplitter(String S,String d){this(S,d,0);}

  public boolean hasMoreTokens(){return thePos>=0;}

  public String nextToken(){
    if(thePos<0) return null;
    int nextPos;
    if(theDelimStr==null) nextPos=theString.indexOf(theDelim,thePos);
    else nextPos=theString.indexOf(theDelimStr,thePos);
    String R;
    if(nextPos>=0){
       R=theString.substring(thePos,nextPos);
       thePos=nextPos+theDelimLength;
       }
    else {
      R=theString.substring(thePos);
      thePos=nextPos;
      }
    return R;
   } 
   
  } // end of StringSplitter utility class