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

来源：互联网发布：java代码执行顺序编辑：程序博客网时间：2024/06/08 05:33

数据库连接我用的是Dao（Database Access Object）用jsp写网页调用数据库老是出现以下错误：

HTTP Status 500 -

type Exception report

message

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

exception

org.apache.jasper.JasperException: Unable to compile class for JSP: An error occurred at line: 41 in the jsp file: /index.jspDao cannot be resolved38:   <li><label class="inputfeature">Structure:</label><select name="structure" class="inputcontent">39:   <%40:   //ResultSet rs=Dao.getStructure();41:   out.println("<p>"+(String)Dao.getStructure().get(1)+"</p>");42:   int i=1;43:   //while(rs.next()){44:   Stacktrace:org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:102)org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:331)org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:457)org.apache.jasper.compiler.Compiler.compile(Compiler.java:378)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)org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

note The full stack trace of the root cause is available in the Apache Tomcat/7.0.23 logs.

Apache Tomcat/7.0.23

弄了好久才解决，自建的类不能放在默认包里，应该新建包来存放