怎么样得到context ？

已经写进去context了的，问题是怎么读出来？在servlet中就可以，关键是先得到context引用，得到以后才可能取出里面的数据
在一个一般的java类文件（标签库）中怎样得到？
<%@ include file="common.jsp" %>
<%@ page import="java.sql.*"%>
<jsp:useBean id="conn" scope="page" class="gkgl.database.LinkSQL"/>
<jsp:useBean id="jsp" scope="page" class="gkgl.include.OutString"></jsp:useBean>
<HTML>
<HEAD>
<title>代码表维护</title>
<meta http-equiv="Content-Language" content="zh-cn">
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<LINK href="/include/css.css" REL="stylesheet" type="text/css">
</HEAD>
<BODY bottommargin=0 leftmargin=0 rightmargin=0 topmargin=0 oncontextmenu="return true;">
<script>function xg(hs,id){
var bgsj=new Array();
var obj=tabdsl;
var temp;
form1.ok.value="修改";
form1.id.value=id;//给隐藏的id表单副值
for (var i=0;i<=4;i++){
temp=obj.rows(hs).cells(i).innerText;
temp=temp.replace('　','');
bgsj[i]=temp;
}
form1.gkfdm.value=bgsj[0];
    form1.gkfmc.value=bgsj[1];
form1.swfdm.value=bgsj[2];
form1.swfmc.value=bgsj[3];
    form1.hsdwdm.value=bgsj[4];
}function bgdelete(id,dm){
if (confirm('真的要删除'+dm+'吗?')) framecssz.location.replace('gkbm_delete.jsp?dm='+dm+'&id='+id);
}function j(nr1,nr2,nr3,nr4,nr5,nr6)
{
var tbIndex=tabdsl.rows.length;
var objRow = tabdsl.insertRow(tbIndex);
objRow.style.background='#ffffff'; var objCel = objRow.insertCell(0);
objCel.style.textAlign='center';
objCel.innerText=nr1;

var objCel = objRow.insertCell(1);
//objCel.style.textAlign='center';
objCel.innerText=nr2;    var objCel = objRow.insertCell(2);
//objCel.style.textAlign='center';
objCel.innerText=nr3;
var objCel = objRow.insertCell(3);
objCel.innerText=nr4 + '　';    var objCel = objRow.insertCell(4);
objCel.innerText=nr5 + '　'; var objCel = objRow.insertCell(5);//修改 nr6=rowid
objCel.style.textAlign='center';
objCel.innerHTML='<p style="cursor: hand"><font color="#0000ff" onclick="xg(' + tbIndex + ',\'' + nr6 + '\');">修改</font></p>';
var objCel = objRow.insertCell(6);//删除  nr6=rowid
objCel.style.textAlign='center';
objCel.innerHTML='<p style="cursor: hand"><font color="#0000ff" onclick="bgdelete(\'' + nr6 + '\',\''+nr1+'\');">删除</font></p>';
}function q(bt)
{
var tbIndex=tabdsl.rows.length-1;
for (var i=tbIndex;i>=bt;i--)
{
tabdsl.deleteRow(i);
}
}function yz(obj){
var ts = new Array();
ts[1]='国库方代码';
    ts[2]='国库方名称';
ts[3]='税务方代码';
ts[4]='税务方名称';
ts[5]='核算单位代码';
//alert(obj.elements.length);
for (var i=1; i<=obj.elements.length-3;i++) {
if (obj.elements[i].value=='') {
alert(ts[i]+'不能为空!');
obj.elements[i].focus();
return false;
}
}     obj.ok.disabled=true;
obj.submit();
}
</script><h3 align="center">国库编码表维护</h3>
<div align="center">
  <center>
<form method="POST" action="gkbm_add.jsp" name="form1"  target="framecssz">
<table border="0" width="80%" cellspacing="0" cellpadding="0">
  <tr>
    <td align="right" nowrap>国库方代码：</td>
    <td>
<input type="hidden" name="id" value="" readonly>
        <p><input type="text" name="gkfdm" size="20" class="input1" ></p>
      </td>
    <td align="right" nowrap>国库方名称：</td>
    <td><input type="text" name="gkfmc" size="30" class="input1" ></td>
  </tr>
  <tr>
    <td align="right" nowrap>税务方代码：</td>
    <td><input type="text" name="swfdm" size="20" class="input1" value=""></td>
    <td align="right" nowrap>税务方名称：</td>
    <td><input type="text" name="swfmc" size="30" class="input1"></td>
  </tr>
    <tr>
    <td align="right" nowrap>核算单位代码：</td>
    <td><input type="text" name="hsdwdm" size="20" class="input1" value=""></td>
    <td align="right" nowrap></td>
    <td></td>
  </tr>
  <tr>
    <td colspan="4">
<BR>
      <p align="center"><input type="button" value="添加" name="ok" onclick="yz(this.form);"> <input type="button" value="重写" name="B2" onclick="window.form1.reset();window.form1.ok.value='添加';"></td>
  </tr>
  </form>
</table><p><b>现有编码清单</b></p>
<table border="1" width="100%" bgcolor="#000000" bordercolorlight="#000000" bordercolordark="#000000"  cellspacing="0" cellpadding="0" id="tabdsl">
  <tr class="tr1">
    <td align="center" rowspan="2">国库方代码</td>
<td align="center" rowspan="2">国库方名称</td>
    <td align="center" rowspan="2">税务方代码</td>
    <td align="center" rowspan="2">税务方名称</td>
    <td align="center" rowspan="2">核算单位代码</td>
    <td align="center" colspan="2">操作</td>
  </tr>
  <tr class="tr1">
<td align="center">修改</td>
    <td align="center">删除</td>
  </tr>
</table>
  </center>
</div>
<iframe name=framecssz width=300 height=300 style="display:none" border=1 frameborder=1 framespacing=1 marginheight=1 marginwidth=1 ></iframe>
<SCRIPT LANGUAGE="JavaScript">

</SCRIPT>
</body>
</html>

调试易

怎么样得到context ？

解决方案 »