在java。util中的java.io.StringTokenizer类能对单个字符串进行解析，在jdk1.4中的split也可以对单个字符串进行解析，但都不能对Reader流进行解析，在多个字符解析的时候也不能返回分割两个字符串的字符串，下面这个类就是为了解决这个问题而写的，还可以在准备包括一些最基本的解析类型，*和?

可以设置多个split进行解析，在解析的时候返回对应的分割字符串

程序可以直接运行

/* * 创建日期 2005-4-4 * * 更改所生成文件模板为 * 窗口 > 首选项 > Java > 代码生成 > 代码和注释 */package com.csii.template;

import java.io.IOException;import java.io.InputStreamReader;import java.io.Reader;import java.io.StringReader;import java.util.Iterator;

/** * author wsl * * 更改所生成类型注释的模板为 * 窗口 > 首选项 > Java > 代码生成 > 代码和注释 */public class ReaderToken implements Iterator {

 private Reader reader = null;//存放准备解析的字符流 private String[] splits = null;//准备用来分割字符流的ｔｏｋｅｎ private StringBuffer HasRead = new StringBuffer();//存放从流中已经读的字符 private String[] splitsSf = null;//由于可能存在一些统配符，所以此处存放统配符在ｔｏｋｅｎ时的字符，比如在abcdefgh /**  *   */ public ReaderToken(Reader reader, String[] split) {  super();  this.reader = reader;  this.splits = split;  splitsSf = new String[split.length];  for (int i = 0; i < split.length; i++) {   splitsSf[i] = "";  } }

 /* （非 Javadoc）  * see java.util.Iterator#hasNext()  */ public boolean hasNext() {  if (indexOf() > -1) {   return true;  }  return false; } private int currentsplit = -1; private int indexOf() {

  currentsplit = -1;  int[] pos = new int[splits.length];  for (int i = 0; i < pos.length; i++) {   splitsSf[i] = "";   pos[i] = 0;  } //初试位置符号

  try {   while (true) {

    for (int j = 0; j < pos.length; j++) {     if (pos[j] >= splits[j].length()) {      currentsplit = j;

      return currentsplit;

      //如果当前ｐｏｓ里面的长度达到最ｓｐｌｉｔｓ里面的最大值，返回当前的ｓｐｌｉｔ     }    }

    char readchar = (char) reader.read();

    if (readchar == -1) {     return currentsplit;    }

    if (readchar == 65535) {     return currentsplit;    }

    HasRead.append(readchar);

    for (int i = 0; i < pos.length; i++) {

     char splitposchar = splits[i].charAt(pos[i]);

     if (splitposchar == readchar) {      pos[i]++;      splitsSf[i] += readchar;     } else if (splitposchar == '*') {      char nextchar = splits[i].charAt((pos[i] + 1));      //得到*后面一个字符,一般统配符都表示为1*2      if (nextchar == readchar) {       pos[i]++;       pos[i]++;      }      splitsSf[i] += readchar;     } else if (splitposchar == '?') {      pos[i]++;      splitsSf[i] += readchar;     } else {

      pos[i] = 0;      splitsSf[i] = "";     }

    }

   }

  } catch (IOException e) {

   e.printStackTrace();  }

  return -1; }

 /* （非 Javadoc）  * see java.util.Iterator#next()  */ public Object next() {

  int i = HasRead.length() - splitsSf[currentsplit].length();

  StringBuffer sf = new StringBuffer();  sf = this.HasRead;  HasRead = new StringBuffer();  //   if(i<0){  //    i=0;  //   }  sf.setLength(i);  return sf;

 } public String getToken() {  return splits[this.currentsplit]; } public String getTokenInReader() {  return splitsSf[currentsplit]; } public Object getEnd() {  return this.HasRead; } /* （非 Javadoc）  * see java.util.Iterator#remove()  */ public void remove() {

 } public static void main(String[] args) throws IOException {  String[] a = new String[] { "a?a" };  String s = "cefaaasdbd";  ReaderToken token = new ReaderToken(new StringReader(s), a);  while (token.hasNext()) {   System.err.println("next---" + token.next());   System.err.println("token---" + token.getToken());   System.err.println(    "getTokenInReader---" + token.getTokenInReader());  }  System.err.println("end--" + token.getEnd());

  //  StringReader reader=new StringReader(s);  //  char c;  //  while((c=(char)reader.read())!=-1){  //   System.err.println(c);  //   System.out.println((long)c);  //  }

 }}