我编写了一个类 作为javabean 编译后我已经class文件就到了ROOT/WEB-INF/CLASS目录下,可是怎么还是显示没有类呀
org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 9 in the jsp file: /www.jsp
Generated servlet error:
C:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\www_jsp.java:54: cannot resolve symbol
symbol : class simple
location: class org.apache.jsp.www_jsp
simple test = null;
^
An error occurred at line: 9 in the jsp file: /www.jsp
Generated servlet error:
C:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\www_jsp.java:56: cannot resolve symbol
symbol : class simple
location: class org.apache.jsp.www_jsp
test = (simple) _jspx_page_context.getAttribute("test", PageContext.PAGE_SCOPE);
^
An error occurred at line: 9 in the jsp file: /www.jsp
Generated servlet error:
C:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\www_jsp.java:58: cannot resolve symbol
symbol : class simple
location: class org.apache.jsp.www_jsp
test = new simple();
^
3 errors
怎么回事?
org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 9 in the jsp file: /www.jsp
Generated servlet error:
C:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\www_jsp.java:54: cannot resolve symbol
symbol : class simple
location: class org.apache.jsp.www_jsp
simple test = null;
^
An error occurred at line: 9 in the jsp file: /www.jsp
Generated servlet error:
C:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\www_jsp.java:56: cannot resolve symbol
symbol : class simple
location: class org.apache.jsp.www_jsp
test = (simple) _jspx_page_context.getAttribute("test", PageContext.PAGE_SCOPE);
^
An error occurred at line: 9 in the jsp file: /www.jsp
Generated servlet error:
C:\Program Files\Apache Software Foundation\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\www_jsp.java:58: cannot resolve symbol
symbol : class simple
location: class org.apache.jsp.www_jsp
test = new simple();
^
3 errors
怎么回事?
解决方案 »
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勿在浮沙筑高台
package test;
public class TestBean{
private String name = null;
public TestBean(String strName_p){
this.name=strName_p;
}
public void setName(String strName_p){
this.name=strName_p;
}
public String getName(){
return this.name;
}
} 2 .编译
将TestBean.java放在c:\test下,使用如下命令编译:
C:\Test>javac TestBean.java
然后在c:\Test下会产生一个编译后的bean文件:TestBean.class
3 . 新建一个test文件夹将TestBean.class文件剪切到 %CATALINA_HOME%\webapps\Root\WEB-INF\classes\test下,
4 .新建一个TestBean.jsp文件,文件内容为:
<%@ page import="test.TestBean" %>
<html><body><center>
<%
TestBean testBean=new TestBean("This is a test java bean.");
%>
Java bean name is: <%=testBean.getName()%>
</center></body></html>
5 .修改ROOT\WEB-INF\web.xml
<servlet-mapping>
<servlet-name>Test</servlet-name>
<url-pattern>/Test</url-pattern> //映射路径
</servlet-mapping> 好了,重启Tomcat,启动浏览器,输入http://localhost:8080/TestBean.jsp 如果看到输出Java bean name is: This is a test java bean.就说明编写的Bean成功了。