jsp中一个很奇怪的初级问题

你出错了吧，应该把Tomcat下common\lib中的jsp-api.jar 和servlet-api.jar拷贝到jdk的\jre\lib\ext下，并且要删除你先前的操作。另外把你的环境变量配置贴上来看看，你配置对没有？

解决方案 »

  1.   

    不可能是配置的错误，还是你的代码出问题了，写一个什么都不作的html代码作为jsp运行试试看会不会出错
      

  2.   

    <%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=gb2312">
    <title>无标题文档</title>
    </head><body></body>
    </html>
    我贴了以上代码，运行正常，这样是不是说明，配置没错
      

  3.   

    <%@ page language="java" import="java.sql.*" %> 
    <%@ page import="java.util.*" %> 
    <jsp:useBean id="workM" scope="page" class="mssql.faq" /> <link rel="stylesheet" href="site_css.css" type="text/css">
    <style type="text/css">
    <!--
    .style2 {color: #000000}
    -->
    </style><script language="javascript">
    function GoCourse(ObjName){ obj=document.CourseParam;
    String CourseYear=obj.selyear.value;
    String CourseTerm=obj.selterm.value;
    CourseYear=CourseYear.substring(0,4);
    if (ObjName.value.equals("添加课程"))
    OperationFlag="AddCourse";
    else
    OperationFlag="ViewCourse";
    window.location.href="admincourse.jsp?session_boolean=true&="+CourseYear+"&CourseTerm="+CourseTerm+"&OperationFlag="+OperationFlag;  
    }//CourseYear
    </script><%! String GetSemester(String SelYear,String SelTerm){
    int StartYear=2003;
    //Integer IntYear=new Integer();
    int DurationYear=Integer.parseInt(SelYear)-StartYear;
    String semester;
    switch(DurationYear){
    case 0:
    if (SelTerm.equals("1"))
    semester="1";
    else
    semester="2";
    break;
    case 1:
    if (SelTerm.equals("1"))
    semester="3";
    else
    semester="4";
    break;
    case 2:
    if (SelTerm.equals("1"))
    semester="5";
    else
    semester="6";
    }//switch
    return semester;
    }
    %><%
    if (request.getParameter("session_boolean")!=null){
    session.setAttribute("scyear")=request.getParameter("CourseYear");
    session.setAttribute("term")=request.getParameter("CourseTerm");
    }

    if (request.getParameter("OperationFlag")!=null &&request.getParameter("OperationFlag").equals("CourseUpdate")){
    String Cno=request.getParameter("Cno");
    String Cname=request.getParameter("Cname");
    String StrCno=request.getParameter("Cno");
    //Integer x=new Integer();
    int Cno=Integer.parseInt(StrCno);
    String StrUpdate="update TCourse set cno='"+Cno+"'";
    workM.executeUpdate(StrUpdate);
    }//
    if(request.getParameter("OperationFlag")!=null && request.getParameter("OperationFlag").equals("DelCourse")){
    String Cno=request.getParameter("cno");
    String StrDel="Delete TCourse where cno='"+Cno+"'"; 
    workM.executeUpdate(StrUpdate);
     }//DelCourse if(request.getParameter("OperationFlag")!=null && request.getParameter("OperationFlag").equals("CourseAdd")){
    String Cno=request.getParameter("Cno");
    String Cname=request.getParameter("Cname");
    String Credit=request.getParameter("Credit");
    String semester=GetSemester(session.getAttribute("scyear"),session.getAttribute("term"));
    String StrInsert="insert into TCourse values('"+Cno+"','"+Cname+"','"+Credit+"','"+Semester+"')";
    workM.executeUpdate(StrInsert);
     }//addCourse%>
    <table width="760" border="0" cellspacing="0" cellpadding="0" align="center">
      

  4.   

    <tr> 
        <td colspan="3" height="8" bgcolor="#FFFFFF"></td>
      </tr>
      <tr> 
        <td width="205" bgcolor="#FFFFFF" valign="top">
         <%//call adminmenu()%>
        </td>
        <td width="1" background="images/dotlinev.gif"></td>
        <td width="554" bgcolor="#FFFFFF" valign="top" align="center"> 
          <table width="100%" border="0" cellspacing="0" cellpadding="0">
            <tr>
              <td height="6"><table width="98%" border="0" align="center" cellpadding="8" cellspacing="1" bgcolor="#C7C7C7">
                  <tr align="center" bgcolor="#E8E8E8"> 
                    <td width="50%" class="chinese"><a href="">课程管理</a></td>
                    <td width="50%" class="chinese"><a href="?action=newnews#newnews">课程管理</a></td>
                  </tr>
                </table>
                <table width="100%" border="0" cellspacing="0" cellpadding="0">
                  <tr>
                    <td height="6"></td>
                  </tr>
                </table></td>
            </tr>
          </table>
         
      
          <table width="98%" border="0" cellspacing="1" cellpadding="4" bgcolor="#293863">
            <form name="CourseParam" method="post" action="admincourse.jsp">
              <tr bgcolor="#999999"> 
                <td colspan="2"><a name="newnews">课程选择参数</a></td>
              </tr>
              <tr> 
                <td width="50%" bgcolor="#FFFFFF" class="chinese">学年：-
                  <select name="selyear">
                    <option value="2003-2004学年" selected>2003-2004学年</option>
                    <option value="2004-2005学年">2004-2005学年</option>
                  </select>              
                &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </td>
                <td width="50%" bgcolor="#FFFFFF" class="chinese">学期：-
                  <select name="selterm">
                    <option value="1" selected>第一学期</option>
                    <option value="2">第二学期</option>
                  </select></td>
              </tr>
              <tr> 
                <td height="30" colspan="2" align="center" bgcolor="#E8E8E8" class="chinese">
                  <input type="button" name="ViewCourse" value="参看课程" onClick="JavaScript:GoCourse(document.CourseParam.ViewCourse);">
                  <input type="button" name="AddCourse" value="添加课程" onClick="JavaScript:GoCourse(document.CourseParam.AddCourse);">
                </td>
              </tr>
      
            </form>
          </table>
    <%  if(request.getParameter("OperationFlag")!=null && request.getParameter("OperationFlag").equals("ViewCourse")){
     %>
      <br>  
       <table width="98%" border="0" cellspacing="1" cellpadding="4" bgcolor="#293863">
             <tr bgcolor="#999999">
               <td colspan="4" class="diaryhead style2">课程浏览</td>
             </tr>
             <tr bgcolor="#E8E8E8" align="center">
               <td class="chinese" width="12%">课程编号</td>
               <td width="34%" class="chinese">课程名</td>
               <td width="34%" class="chinese">学分数</td>
               <td class="chinese" width="20%">操作</td>
             </tr>
             <%
    String SelYear=request.getParameter("CourseYear");
    SelYear=SelYear.substring(0,4);  //获取前4位
    String SelTerm=request.getParameter("CourseTerm");

    String semester =GetSemester(SelYear,SelTerm); //得到学期数



    String StrSql="select distinct cno,cname,credit from VCourse where semester='"+semester+"'"; ResultSet RS = workM.executeQuery(StrSql); 
    while (RS.next()) {
    %>
             <tr>
               <td bgcolor="#FFFFFF" class="chinese" align="center"><%=RS.getString("cno")%>
       </td>
               <td bgcolor="#FFFFFF" class="chinese"><%=RS.getString("cname")%>
       </td>
               <td bgcolor="#FFFFFF" class="chinese"><%=RS.getString("credit")%>
       </td>
               <td bgcolor="#FFFFFF" class="chinese"><div align="center"><a href="admincourse.jsp?cno=<%=RS.getString("cno")%>&OperationFlag=EditCourse#EditCourse">编辑</a> 
             <a href="admincourse.jsp?cno=<%=RS.getString("cno")%>&OperationFlag=CourseDel#CourseDel" >删除</a>
           </div></td>
             </tr>
             <% } %>
       <% RS.close(); %> 
       </table>
       <% } //课程浏览结束