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困扰一天的购物车有关问题

www.myexceptions.net  网友分享于：2015-08-26  浏览：13次

困扰一天的购物车问题！

我先写了一个购车车的类，然后在JSP中导入调用它，但是它竟然说无法识别那个Shopcart类，但我明明已经导入了啊！望兄弟们赐教，在此先谢过啦！

代码如下:

Shopcart.java   :

package   com.bookshop.bean;

public   class   Shopcart   {

public   int   bookID;

public   String   bookName;

public   String   ISBN;

public   float   price;

public   int   number;

}

cart_add.jsp   ：

HTML   PUBLIC   "-//W3C//DTD   HTML   4.01   Transitional//EN ">

cart_add

request.setCharacterEncoding( "GBK ");

int   bookID   =   Integer.parseInt(request.getParameter( "bookID "));

String   sql   =   "select   *   from   books   where   bookID= ' "+bookID+ " ' ";

ResultSet   rs   =   con.executeQuery(sql);

float   price   =   0;

if(rs.next()){

price   =   rs.getInt( "price ");

}

Shopcart   bookelement   =   new   Shopcart();

bookelement.bookID   =   bookID;

bookelement.price   =   price;

bookelement.number   =   1;

boolean   flag   =   true;

Vector   cart   =   (Vector)session.getAttribute( "cart ");

if(cart==null){

cart   =   new   Vector();

}else{

for(int   i=1;i

Shopcart   bookitem   =   (Shopcart)cart.elementAt(i);

if(bookitem.bookID==bookelement.bookID){

bookitem.number++;

cart.setElementAt(bookitem,i);

flag   =   false;

}

}

}

if(flag){

cart.addElement(bookelement);

session.setAttribute( "cart ",cart);

con.close();

out.println( " ");

}

%>

出现的错误:

org.apache.jasper.JasperException:   Unable   to   compile   class   for   JSP

An   error   occurred   at   line:   9   in   the   jsp   file:   /bookshop/WebRoot/cart_add.jsp

Generated   servlet   error:

D:\Tomcat5.0\work\Catalina\localhost\test\org\apache\jsp\bookshop\WebRoot\cart_005fadd_jsp.java:73:   找不到符号

符号：   类   Shopcart

位置：   类   org.apache.jsp.bookshop.WebRoot.cart_005fadd_jsp

Shopcart   bookelement   =   new   Shopcart();

^

An   error   occurred   at   line:   9   in   the   jsp   file:   /bookshop/WebRoot/cart_add.jsp

Generated   servlet   error:

D:\Tomcat5.0\work\Catalina\localhost\test\org\apache\jsp\bookshop\WebRoot\cart_005fadd_jsp.java:73:   找不到符号

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