大神们，求助啊
class代码：
package sale;
public class Goods {
public String product;
public double price;
public String getProduct() {
return product;
}
public void setProduct(String product) {
this.product = product;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public Goods(String product, double price) {
super();
this.product = product;
this.price = price;
}
jsp页面代码：
<body>
<jsp:useBean scope="page" id="Goods" type="sale.Goods" class="sale.Goods"/>
<%Goods.setProduct("huangjinhua");
Goods.setPrice(11.11); %>
方法一：
产品：<%=Goods.getProduct() %>
价格：<%=Goods.getPrice() %>
方法二：
产品：<jsp:getProperty property="product" name="goods"/>
价格：<jsp:getProperty property="price" name="goods"/>
</body>
我一运行就出现如下的错误：
org.apache.jasper.JasperException: /index.jsp (line: 13, column: 1) The value for the useBean class attribute sale.Goods is invalid.
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:42)
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:408)
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:149)
org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1234)
org.apache.jasper.compiler.Node$UseBean.accept(Node.java:1182)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2428)
org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2434)
org.apache.jasper.compiler.Node$Root.accept(Node.java:475)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2376)
org.apache.jasper.compiler.Generator.generate(Generator.java:3490)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:250)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:373)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646) 求助啊
[解决办法]
Goods.setPrice(11.11); 不能用方法名直接调用非静态方法。Goods创建个对象再调用
[解决办法]
Goods 改为小写 上面也是
[解决办法]
增加一个无参的构造方法
[解决办法]
