遇到了Unable to compile class for JSP，下载的代码应该是没问题

org.apache.jasper.JasperException: Unable to compile class for JSP: An error occurred at line: 7 in the generated java file
Only a type can be imported. com.wgh.DB.connDB resolves to a packageAn error occurred at line: 8 in the generated java file
Only a type can be imported. com.wgh.DB.connDB resolves to a packageAn error occurred at line: 9 in the generated java file
Only a type can be imported. com.wgh.DB.connDB resolves to a packageAn error occurred at line: 7 in the jsp file: /mingri/WebModuleDefault/index.jsp
connDB cannot be resolved to a type
4: <jsp:directive.page import="com.wgh.DB.connDB"/>
5: </html>
6: <%
7: connDB conn=new connDB();
8: String username=(String)session.getAttribute("username");
9: ResultSet rs_sale=conn.executeQuery("select top 2 ID,GoodsName,price,nowprice,picture from tb_goods where sale=1 order by INTime desc");
10: int sale_ID=0;
Only a type can be imported. com.wgh.DB.connDB resolves to a package的问题 问题补充：开头的代码如下
<%@page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<%@page import="com.wgh.DB.connDB"%>
<%
connDB conn=new connDB();
....
D:\Apache Software Foundation\Tomcat 6.0\webapps\ROOT\mingri\WebModuleDefault\WEB-INF\classes\com\wgh\DB
connDB.class文件在里面

解决方案 »

  1.   

    代码
    <%@page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
    <%@page import="com.wgh.DB.connDB"%>
    <jsp:directive.page import="com.wgh.DB.connDB.*"/>
    <%
    connDB conn=new connDB();
    String username=(String)session.getAttribute("username");
    ResultSet rs_sale=conn.executeQuery("select top 2 ID,GoodsName,price,nowprice,picture from tb_goods where sale=1 order by INTime desc");
    int sale_ID=0;
    String s_goodsname="";
    float s_price=0;
    float s_nowprice=0;
    String s_picture="";
    ResultSet rs_new=conn.executeQuery("select top 4 ID,GoodsName,nowprice,introduce,picture from tb_goods where newGoods=1 order by INTime desc");
    int new_ID=0;
    String new_goodsname="";
    float new_nowprice=0;
    String new_introduce="";
    String new_picture="";
    %>
    <html>
    <head>
    <title>Go购电子商城</title>
    <meta http-equiv="Content-Type" content="text/html; charset=gb2312">
    <link href="CSS/style.css" rel="stylesheet">
    </head><body>
    <table width="790"  border="0" cellspacing="0" cellpadding="0" align="center">
     <tr>
     <td class="tableBorder">
    <jsp:include page="navigation.jsp"/>
    <table width="790" height="236"  border="0" align="center" cellpadding="0" cellspacing="0">
      <tr>
        <td width="182" height="182" valign="top">
    <jsp:include page="left.jsp"/>
    </td>
        <td valign="top"><table width="100%"  border="0" cellpadding="0" cellspacing="0">
          <tr>
            <td height="33" background="images/shop_12.gif"></td>
            <td width="505" height="33" align="right" valign="middle" background="images/shop_12.gif"><table width="100%" height="24"  border="0" cellpadding="0" cellspacing="0">
              <tr>
                <td height="8"></td>
              </tr>
              <tr>
                <td align="right" class="word_green">
    <marquee direction="left" scrollamount="1" scrolldelay="1" onMouseOver="this.stop();" onMouseOut="this.start();">
    <%if(username==null || username==""){%>^_^ 顾客您好！购买商品请先登录 <a href="register.jsp" class="word_green">[新用户注册]</a><%}else{%>^_^ <%=username%> 您好! Go购电子商城欢迎您!<%}%></marquee></td>
              </tr>
            </table></td>
            <td width="10" background="images/shop_12.gif">&nbsp;</td>
          </tr>
          <tr>
            <td width="93" height="50" background="images/shop_15.gif">&nbsp;</td>
            <td colspan="2" background="images/shop_16.gif">
    <jsp:include page="search.jsp"/>
    </td>
          </tr>
        </table>
          <table width="100%"  border="0" cellspacing="0" cellpadding="0">
            <tr>
              <td width="69%" height="189" valign="top"><table width="100%"  border="0" cellspacing="0" cellpadding="0">
                <tr>
                  <td width="98%" height="80" background="images/shop_18.gif">&nbsp;</td>
                  <td width="2%"><img src="images/shop_19.gif" width="10" height="80"></td>
                </tr>
                <tr align="center" valign="top">
                  <td height="134" colspan="2"><table width="100%" height="162"  border="0" cellpadding="0" cellspacing="0">
                    <tr>
                      <td width="49%" height="162" valign="top">
      <%int s=1;
      while (rs_sale.next()){
    sale_ID=rs_sale.getInt(1);
    s_goodsname=rs_sale.getString(2);
    s_price=rs_sale.getFloat(3);
    s_nowprice=rs_sale.getFloat(4);
    s_picture=rs_sale.getString(5);
       if(s%2==1){
      %>
      <table width="100%"  border="0" cellpadding="0" cellspacing="0">
                        <tr>
                          <td height="95" align="center"><img src="images/goods/<%=s_picture%>" width="150" height="88"></td>
                        </tr>
                        <tr>
                          <td height="22" align="center"><a href="goods_detail.jsp?ID=<%=sale_ID%>"><%=s_goodsname%></a></td>
                        </tr>
                        <tr>
                          <td height="20" align="center" style="text-decoration:line-through;color:#FF0000">原价：<%=s_price%> </td>
                        </tr>
                        <tr>
                          <td height="20" align="center">现价：<%=s_nowprice%></td>
                        </tr>
                        <tr>
                          <td height="22" align="center"><input name="see" type="button" class="btn_grey" onClick="window.location.href='goods_detail.jsp?ID=<%=sale_ID%>'" value="详细信息">
    <%if (username!=null && username!=""){%>&nbsp;
     <input name="see" type="button" class="btn_grey" onClick="window.location.href='cart_add.jsp?goodsID=<%=sale_ID%>'" value="购买">
     <%}%>
       </td>
                        </tr>
                      </table>
      <%}else{%>
      </td>
                      <td width="2%" align="center" valign="top"><table width="3" height="160"  border="0" cellpadding="0" cellspacing="0" background="images/point.gif">
                        <tr>
                          <td></td>
                        </tr>
                      </table></td>
                      <td width="49%" valign="top">
        <table width="100%"  border="0" cellpadding="0" cellspacing="0">
                          <tr>
                            <td height="95" align="center"><img src="images/goods/<%=s_picture%>" width="150" height="88"></td>
                          </tr>
                          <tr>
                            <td height="22" align="center"><a href="goods_detail.jsp?ID=<%=sale_ID%>"><%=s_goodsname%></a></td>
                          </tr>
                          <tr>
                            <td height="20" align="center" style="text-decoration:line-through;color:#FF0000">原价：<%=s_price%> </td>
                          </tr>
                          <tr>
                            <td height="20" align="center">现价：<%=s_nowprice%></td>
                          </tr>
                          <tr>
                            <td height="22" align="center"><input name="see" type="button" class="btn_grey" onClick="window.location.href='goods_detail.jsp?ID=<%=sale_ID%>'" value="详细信息">
    <%if (username!=null && username!=""){%>&nbsp;
     <input name="see" type="button" class="btn_grey" onClick="window.location.href='cart_add.jsp?goodsID=<%=sale_ID%>'" value="购买">
     <%}%>
     </td>
                          </tr>
                        </table>
        <%}
      s++;
      }%>   </td>
                    </tr>
                  </table></td>
                </tr>
                <tr>
                  <td height="42" align="right" background="images/shop_24.gif"><a href="sale.jsp"><img src="images/MORE.GIF" width="50" height="20" border="0"></a><a href="sale.jsp"><br>
                      <br>
                  </a></td>
                  <td height="42" background="images/shop_25.gif">&nbsp;</td>
                </tr>
              </table>
                <table width="100%" height="76"  border="0" cellpadding="0" cellspacing="0">
                  <tr>
                    <td width="361" background="images/shop_28.gif">&nbsp;</td>
                    <td width="46" height="35" background="images/shop_29.gif">&nbsp;</td>
                  </tr>
                  <tr>
                    <td colspan="2">
    <% while (rs_new.next()){
    new_ID=rs_new.getInt(1);
    new_goodsname=rs_new.getString(2);
    new_nowprice=rs_new.getFloat(3);
    new_introduce=rs_new.getString(4);
    new_picture=rs_new.getString(5);
                                            if(new_introduce.length()>20){
                                              new_introduce=new_introduce.substring(0,20)+"...";
                                            }
    %>
    <table width="100%" height="79"  border="0" cellpadding="0" cellspacing="0" class="tableBorder_B_dashed">
                      <tr>
                        <td width="33%" height="95" rowspan="4" align="center"><img src="images/goods/<%=new_picture%>" width="99" height="61"></td>
                        <td width="67%"><%=new_goodsname%></td>
                        </tr>
                      <tr>
                        <td>单价：<%=new_nowprice%>(元) </td>
                      </tr>
                      <tr>
                        <td><%=new_introduce%></td>
                      </tr>
                      <tr>
                        <td>
                          <input name="see" type="button" class="btn_grey" onClick="window.location.href='goods_detail.jsp?ID=<%=new_ID%>'" value="查看详细信息">
    <%if (username!=null && username!=""){%>&nbsp;
     <input name="see" type="button" class="btn_grey" onClick="window.location.href='cart_add.jsp?goodsID=<%=new_ID%>'" value="购买">
     <%}%></td>
                      </tr>
                    </table>
    <%}%> <table width="100%" height="30"  border="0" cellpadding="0" cellspacing="0">
                      <tr>
                        <td width="98%" align="right"><a href="NewGoods.jsp"><img src="images/MORE.GIF" width="50" height="20" border="0"></a></td>
                        <td width="2%">&nbsp;</td>
                      </tr>
                    </table></td>
                  </tr>
                </table></td>
              <td width="31%" valign="top"><jsp:include page="right.jsp"/></td>
            </tr>
          </table></td>
      </tr>
    </table>
    <table width="790"  border="0" align="center" cellpadding="0" cellspacing="0">
      <tr>
        <td><jsp:include page="copyright.jsp"/></td>
      </tr>
    </table>
    </td>
    </tr>
    </table>
    </body>
    </html>
    <%conn.close();%>
      

  2.   

    <jsp:directive.page import="com.wgh.DB.connDB.*"/>不用管吧，加不加都一样的
      

  3.   

     import="com.wgh.DB.connDB.*;
    加上分号。
      

  4.   

    <%@page import="com.wgh.DB.connDB"%>
    这句话去掉，因为这个是一个包，而不是类。Only a type can be imported. com.wgh.DB.connDB resolves to a package
    这句话的意思就是说，只能import一个类型，而com.wgh.DB.connDB是一个包。
      

  5.   

    那怎么处理，要引进这个connDB。class才可以连接数据库啊