JSP页面调用JavaBean有关问题[急]
日期：2014-05-18 浏览次数：20914 次
JSP页面调用JavaBean问题[急急急!!!]
我写了一个JavaBean，源代码如下
package PK_HelloWorld;
public class HelloWorld{
public HelloWorld(){}
public static void main(String[] args){
System.out.print( "Hello World!!!!!\n ");
}
}
并生成类HelloWorld.class。
写了一个Jsp页面调用这个javabean，源代码如下
<%@ page contentType= "text/html;charset=UTF-8 " %>
<jsp:useBean id= "sessionBean1 " scope= "page " class= "uo.HelloWorld "/> <html>
<head>
<title> DDDDDDDDDDDDDD </title>
</head>
<table> <tr>
<td>
dfsfdsfdsd
<%
System.out.print( "AAAAAxcAAAAAA ");
//sessionBean1.setUserId(userid); //useridˇjavaτ¼��
%>
</td>
</tr> </table>
</html>
结果在条用页面出现以下提示
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: -1 in the jsp file: null
Generated servlet error:
[javac] Compiling 1 source file
[javac] D:\jboss-3.2.2RC4\server\default\work\MainEngine\localhost\wl\default_on_jsp.java:42: cannot access uo.HelloWorld
[javac] bad class file: D:\jboss-3.2.2RC4\server\default\deploy\wl.war\WEB-INF\classes\uo\HelloWorld.class
[javac] class file contains wrong class: PK_HelloWorld.HelloWorld
[javac] Please remove or make sure it appears in the correct subdirectory of the classpath.
[javac] uo.HelloWorld sessionBean1 = null;
[javac] ^
[javac] 1 error
我的Web Server是jboss-3.2.2RC4，哪位高人提点意见呀
------解决方案--------------------
package错了
------解决方案--------------------
你的包路径不是PK_HelloWorld么，怎么在jsp中引入的路径却是uo.HelloWorld。这里不对
------解决方案--------------------
<jsp:useBean id= "sessionBean1 " scope= "page " class= "PK_HelloWorld.HelloWorld "/>
------解决方案--------------------
我将你的代码下下来测试了一下，发现将 <jsp:useBean id= "sessionBean1 " scope= "page " class= "uo.HelloWorld "/> 改成 <jsp:useBean id= "sessionBean1 " scope= "page " class= "PK_HelloWorld.HelloWorld "/> 就可以成功编译并运行。
------解决方案--------------------
怎么搞的啊.放在uo中,代码上又写package PK_HelloWorld;
应该是jboss-3.2.2RC4\server\default\deploy\wl.war\WEB-INF\classes\PK_HelloWorld
或者是把package PK_HelloWorld;换成package uo;
我写了一个JavaBean，源代码如下
package PK_HelloWorld;
public class HelloWorld{
public HelloWorld(){}
public static void main(String[] args){
System.out.print( "Hello World!!!!!\n ");
}
}
并生成类HelloWorld.class。
写了一个Jsp页面调用这个javabean，源代码如下
<%@ page contentType= "text/html;charset=UTF-8 " %>
<jsp:useBean id= "sessionBean1 " scope= "page " class= "uo.HelloWorld "/> <html>
<head>
<title> DDDDDDDDDDDDDD </title>
</head>
<table> <tr>
<td>
dfsfdsfdsd
<%
System.out.print( "AAAAAxcAAAAAA ");
//sessionBean1.setUserId(userid); //useridˇjavaτ¼��
%>
</td>
</tr> </table>
</html>
结果在条用页面出现以下提示
org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: -1 in the jsp file: null
Generated servlet error:
[javac] Compiling 1 source file
[javac] D:\jboss-3.2.2RC4\server\default\work\MainEngine\localhost\wl\default_on_jsp.java:42: cannot access uo.HelloWorld
[javac] bad class file: D:\jboss-3.2.2RC4\server\default\deploy\wl.war\WEB-INF\classes\uo\HelloWorld.class
[javac] class file contains wrong class: PK_HelloWorld.HelloWorld
[javac] Please remove or make sure it appears in the correct subdirectory of the classpath.
[javac] uo.HelloWorld sessionBean1 = null;
[javac] ^
[javac] 1 error
我的Web Server是jboss-3.2.2RC4，哪位高人提点意见呀
------解决方案--------------------
package错了
------解决方案--------------------
你的包路径不是PK_HelloWorld么，怎么在jsp中引入的路径却是uo.HelloWorld。这里不对
------解决方案--------------------
<jsp:useBean id= "sessionBean1 " scope= "page " class= "PK_HelloWorld.HelloWorld "/>
------解决方案--------------------
我将你的代码下下来测试了一下，发现将 <jsp:useBean id= "sessionBean1 " scope= "page " class= "uo.HelloWorld "/> 改成 <jsp:useBean id= "sessionBean1 " scope= "page " class= "PK_HelloWorld.HelloWorld "/> 就可以成功编译并运行。
------解决方案--------------------
怎么搞的啊.放在uo中,代码上又写package PK_HelloWorld;
应该是jboss-3.2.2RC4\server\default\deploy\wl.war\WEB-INF\classes\PK_HelloWorld
或者是把package PK_HelloWorld;换成package uo;
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