对html格式的文本进行指定数据提取的问题

String html="<table width=/"200/" border=/"1/">
  <tr>
    <td>text</td>
    <td> aaaa</td>
  </tr>
  <tr>
    <td>text2</td>
    <td> aaaa</td>
  </tr>
  <tr>
    <td>text3</td>
    <td> aaaa</td>
  </tr>
  <tr>
    <td>text4</td>
    <td> aaaa</td>
  </tr>
  <tr>
    <td>text5</td>
    <td> aaaa</td>
  </tr>
  <tr>
    <td>text6</td>
    <td> aaaa</td>
  </tr>
</table>";
现在要把每行的第一列里的内容和第二列的内容以hashtable的key和value形式提取出来,具体怎么写?...现在似乎没有思路..最后应该是返回个List容器,里面放的都是hashtable,其中key是每行第一列的内容,如"text",value是第二列的内容,如" aaa"

解决方案 »

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StringBuffer htmlBuffer= new StringBuffer();
  htmlBuffer.append("");
  htmlBuffer.append("<table width=\"200\" border=\"1\">");
  htmlBuffer.append("  <tr>");
  htmlBuffer.append("    <td>text</td>");
  htmlBuffer.append("    <td> aaaa</td>");
  htmlBuffer.append("  </tr>");
  htmlBuffer.append("  <tr>");
  htmlBuffer.append("    <td>text2</td>");
  htmlBuffer.append("    <td> bbbb</td>");
  htmlBuffer.append("  </tr>");
  htmlBuffer.append("  <tr>");
  htmlBuffer.append("    <td>text3</td>");
  htmlBuffer.append("    <td> cccc</td>");
  htmlBuffer.append("  </tr>");
  htmlBuffer.append("  <tr>");
  htmlBuffer.append("    <td>text4</td>");
  htmlBuffer.append("    <td> dddd</td>");
  htmlBuffer.append("  </tr>");
  htmlBuffer.append("  <tr>");
  htmlBuffer.append("    <td>text5</td>");
  htmlBuffer.append("    <td> eeee</td>");
  htmlBuffer.append("  </tr>");
  htmlBuffer.append("  <tr>");
  htmlBuffer.append("    <td>text6</td>");
  htmlBuffer.append("    <td> ffff</td>");
  htmlBuffer.append("  </tr>");
  htmlBuffer.append("</table>");

  String strHtml = htmlBuffer.toString();
  ArrayList result = new ArrayList();
  while(strHtml.indexOf("<td>") > -1) {
   String[] items = new String[2];
   int start = strHtml.indexOf("<td>") + 4;
   int end = strHtml.indexOf("</td>");
   items[0] = strHtml.substring(start, end);
   strHtml = strHtml.substring(end + 4);
   start = strHtml.indexOf("<td>") + 4;
   end = strHtml.indexOf("</td>");
   items[1] = strHtml.substring(start, end);
   result.add(items);
   strHtml = strHtml.substring(end + 4);
  }  for (int i = 0; i < result.size(); i++) {
   System.out.println(((String[])result.get(i))[0] + "  " +
   ((String[])result.get(i))[1]);
  }结果输出:
text   aaaa
text2   bbbb
text3   cccc
text4   dddd
text5   eeee
text6   ffff
感谢楼上的,不过我顶楼举的例子是最简单的,实际中应用比较复杂如下面这个:<table width="200" border="1">
  <tr>
    <td>text</td>
    <td colspan="2"> aaaa</td>
  </tr>
  <tr>
    <td>text2</td>
    <td> aaaa</td>
<td> aaaa</td>
  </tr>
  <tr>
    <td>text3</td>
    <td colspan="2"> aaaa</td>
  </tr>
  <tr>
    <td>text4</td>
    <td colspan="2"> aaaa</td>
  </tr>
  <tr>
    <td>text5</td>
    <td colspan="2"> aaaa</td>
  </tr>
  <tr>
    <td>text6</td>
    <td colspan="2"> aaaa</td>
  </tr>
</table>有的行是3列的我实际上要把每行第2列以后的所有内容都提取出来作为value,并且要包括<td></td>这些标签,每行第1列倒是直接提取内容...这样的话楼上那程序可能就不适用了...
easy:  StringBuffer htmlBuffer= new StringBuffer();
  htmlBuffer.append("");
  htmlBuffer.append("<table width=\"200\" border=\"1\">");
  htmlBuffer.append("  <tr>");
  htmlBuffer.append("    <td>text</td>");
  htmlBuffer.append("    <td colspan=\"2\"> aaaa</td>");
  htmlBuffer.append("  </tr>");
  htmlBuffer.append("  <tr>");
  htmlBuffer.append("    <td>text2</td>");
  htmlBuffer.append("    <td> bbbb</td>");
  htmlBuffer.append("    <td> aaaa</td>");
  htmlBuffer.append("  </tr>");
  htmlBuffer.append("  <tr>");
  htmlBuffer.append("    <td>text3</td>");
  htmlBuffer.append("    <td> cccc</td>");
  htmlBuffer.append("    <td colspan=\"2\"> aaaa</td>");
  htmlBuffer.append("  </tr>");
  htmlBuffer.append("  <tr>");
  htmlBuffer.append("    <td>text4</td>");
  htmlBuffer.append("    <td colspan=\"2\"> dddd</td>");
  htmlBuffer.append("    <td colspan=\"2\"> aaaa</td>");
  htmlBuffer.append("  </tr>");
  htmlBuffer.append("  <tr>");
  htmlBuffer.append("    <td>text5</td>");
  htmlBuffer.append("    <td> eeee</td>");
  htmlBuffer.append("    <td colspan=\"2\"> aaaa</td>");
  htmlBuffer.append("  </tr>");
  htmlBuffer.append("  <tr>");
  htmlBuffer.append("    <td>text6</td>");
  htmlBuffer.append("    <td colspan=\"2\"> ffff</td>");
  htmlBuffer.append("    <td colspan=\"2\"> aaaa</td>");
  htmlBuffer.append("  </tr>");
  htmlBuffer.append("</table>");

  String strHtml = htmlBuffer.toString();
  ArrayList result = new ArrayList();
  String strOperation = null;
  int trStart = strHtml.indexOf("<tr>");
  String value = null;
  while(trStart > -1) {
   int trEnd = strHtml.indexOf("</tr>");
   strOperation = strHtml.substring(trStart, trEnd + 5);
   String[] items = new String[2];
   int start = strOperation.indexOf("<td>") + 4;
   int end = strOperation.indexOf("</td>");
   items[0] = strOperation.substring(start, end);

   strOperation = strOperation.substring(end + 5);
   value = "";
   while (strOperation.indexOf("<td") > -1) {
           start = strOperation.indexOf("<td");
           end = strOperation.indexOf("</td>");
           value = value + strOperation.substring(start, end + 5);
           strOperation = strOperation.substring(end + 5);
   }
   items[1] = value;
   result.add(items);
   strHtml = strHtml.substring(trEnd + 5);
   trStart = strHtml.indexOf("<tr>");
  }  for (int i = 0; i < result.size(); i++) {
   System.out.println(((String[])result.get(i))[0] + "  " +
         ((String[])result.get(i))[1]);
  }//输出结果如下:
text  <td colspan="2"> aaaa</td>
text2  <td> bbbb</td><td> aaaa</td>
text3  <td> cccc</td><td colspan="2"> aaaa</td>
text4  <td colspan="2"> dddd</td><td colspan="2"> aaaa</td>
text5  <td> eeee</td><td colspan="2"> aaaa</td>
text6  <td colspan="2"> ffff</td><td colspan="2"> aaaa</td>
再次感谢楼上的兄弟，不过这算法如果对于表格里嵌套就无效了．．．如以下：<table width="200" border="1">
  <tr>
    <td>text</td>
    <td colspan="2"> aaaa</td>
  </tr>
  <tr>
    <td>text2</td>
    <td><table><tr><td> aaaa</td></tr><tr><td> aaaa</td></tr></table></td>
<td> aaaa</td>
  </tr>
  <tr>
    <td>text3</td>
    <td colspan="2"> aaaa</td>
  </tr>
  <tr>
    <td>text4</td>
    <td colspan="2"> aaaa</td>
  </tr>
  <tr>
    <td>text5</td>
    <td colspan="2"> aaaa</td>
  </tr>
  <tr>
    <td>text6</td>
    <td colspan="2"> aaaa</td>
  </tr>
</table>
问题的关键不就是怎么把table下直属的tr，以及tr下直属的td给识别出来。由于标识特性：“<tr”和“<td”、“</tr”和“</td”，他们是不变的，是不是可以顺着这个去求解？可以使用栈来控制是否取值。
HTML是XML的一种，用dom4j。把字符串当做xml流处理就可以了。