jsp可以调用静态方法吗
以下是bean：
package wms;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import wms.db.DBTool;
public class DropdownList
{
public static String getUnitList()
{
Statement stms = DBTool.getStatement();
ResultSet rs = null;
String unit_id,unit_name,str_script;
str_script = "";
try
{
rs = stms.executeQuery("select unit_id,unit_name from c_unit_base where type = '3'");
while (rs.next())
{
unit_id = rs.getString("unit_id");
unit_name = rs.getString("unit_name");
str_script += "<OPTION VALUE='"+unit_id.trim()+"'>"+unit_name.trim();
}
} catch (SQLException e)
{
e.printStackTrace();
}
return str_script;
}
public static void main(String arg[])
{
System.out.println("unit:" + getUnitList());
}
}
JSP中是这样调用的：
<jsp:useBean id="wunai" scope="application" class="wms.datalist.DropdownList"/>
以下错误信息：
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: 10 in the jsp file: /inorder.jsp
Generated servlet error:
[javac] Compiling 1 source file
F:\jakarta-tomcat-5.0.19\work\Catalina\localhost\kl\org\apache\jsp\inorder_jsp.java:52: ??? wms.datalist ???
wms.datalist.DropdownList wunai = null;
^
An error occurred at line: 10 in the jsp file: /inorder.jsp
Generated servlet error:
F:\jakarta-tomcat-5.0.19\work\Catalina\localhost\kl\org\apache\jsp\inorder_jsp.java:54: ??? wms.datalist ???
wunai = (wms.datalist.DropdownList) _jspx_page_context.getAttribute("wunai", PageContext.APPLICATION_SCOPE);
^
An error occurred at line: 10 in the jsp file: /inorder.jsp
Generated servlet error:
F:\jakarta-tomcat-5.0.19\work\Catalina\localhost\kl\org\apache\jsp\inorder_jsp.java:56: ??? wms.datalist ???
wunai = new wms.datalist.DropdownList();
^
An error occurred at line: 264 in the jsp file: /inorder.jsp
Generated servlet error:
F:\jakarta-tomcat-5.0.19\work\Catalina\localhost\kl\org\apache\jsp\inorder_jsp.java:315: ?????
??? ?? DropdownList
??? ? org.apache.jsp.inorder_jsp
out.print(DropdownList.getUnitList());
^
4 ??
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:127)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:351)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:415)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:458)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:553)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:291)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
note The full stack trace of the root cause is available in the Tomcat logs.
请各位大虾指教，不胜感激，晚上结贴
[解决办法]
<jsp:useBean id="wunai" scope="application" class="wms.datalist.DropdownList"/ >
确定你这句没错？我感觉是class="wms.DropdownList"
[解决办法]
jsp里面不能调用静态类型的方法吗？
绝对可以
[解决办法]
导入静态类所在的包试试
[解决办法]
静态方法package com.bluedn.manager.model.bubean;import com.bluedn.manager.model.vo.UserPermVO;public class UserBean extends UserPermVO { public static void GetPerm(long iPermValue) { SysManage = (iPermValue & 1) > 0; //系统管理 Bargain = (iPermValue & 2) > 0; //合同管理 BargainAdd = (iPermValue & 4) > 0; //合同登记 BargainUpdate = (iPermValue & 8) > 0; //合同修改 BargainDel = (iPermValue & 16) > 0; //合同删除 BargainQuery = (iPermValue & 32) > 0; //合同查询 BargainExport = (iPermValue & 64) > 0; //合同导出 }}<%@ page import="com.bluedn.manager.model.vo.UserPermVO"%><% long iPermValue = Long.parseLong(session.getAttribute("strUserTab").toString()); UserBean.GetPerm(iPermValue);%>
我的异常网推荐解决方案：The server encountered an internal error () that prevented it from fulfilling this request.,http://www.myexception.cn/java-web/317.html
我的异常网推荐解决方案：org.apache.jasper.JasperException: Unable to compile class,http://www.myexception.cn/j2ee/2308.html