java - org.apache.jasper.JasperException :/index. jsp

Question

我在 jsp 上使用 usebean 标记，但即使我已尽我所能解决问题，我仍收到以下错误。谁能帮忙 错误如下

类型异常报告

message /index.jsp (line: 1, column: 1) The value for the useBean     
class attribute org.deepak.my is invalid.

description The server encountered an internal error that prevented 
it from fulfilling this request.

异常

org.apache.jasper.JasperException: /index.jsp (line: 1, column: 1) 
The value for the useBean class attribute org.deepak.my is invalid.
    org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:42)
    org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:291)
    org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:114)
    org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1379)
    org.apache.jasper.compiler.Node$UseBean.accept(Node.java:1187)
    org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392)
    org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2444)
    org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2450)
    org.apache.jasper.compiler.Node$Root.accept(Node.java:471)
    org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392)
    org.apache.jasper.compiler.Generator.generate(Generator.java:3668)
    org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:252)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:372)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:349)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:333)
    org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:600)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:368)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
   org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

注意 Apache Tomcat/9.0.0.M17 日志中提供了根本原因的完整堆栈跟踪。

Answer 1

如果存在以下情况，请尝试在下面的语句中使用type 而不是class:-
<jsp:useBean id="my" class="org.deepak.my" />

在发布问题之前尝试在 SO 上找到答案，请参阅此 Answer由@BalusC 提供，它将帮助您解决问题。