郁闷的tomcat 搂住看一下useBean这个类是否导入成功,如果不是导入的类看看是否已经声明了!最好是能贴出代码!这个异常报的是找不到useBean这个类! 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 代码是这样的useBean.jsp<html><jsp:useBean id="atest" class="useBean"/><head><title>useBean.jsp</title></head><body><% atest.init(); atest.execute(); atest.clean();%></body></html>调用的bean为:import java.sql.*;import javax.servlet.*;import javax.servlet.jsp.*;public class useBean{ ServletRequest request; JspWriter out; public void useBean(){} public void init(ServletRequest req,JspWriter ou){ //初始化 requst=req; out=ou;} public void execute(){ //Get parameters from request String name,pwd; name=request.getParameter("name"); pwd=request.getParameter("pwd"); try{ //add infomation to DB Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); Connection con=DriverManager.getConnection("jdbc:odbc:JSPTEST"); Statement stmt=con.createStatement(); stmt.executeUpdate("insert into zhuche values('"+name+"','"+pwd+"')"); //query DB for display all users ResultSet rs=stmt.executeQuery("select * frm zhuche"); out.println("<pre>"); out.println("All user in DB!"); while(rs.next()){ out.print("user name:"); out.print(rs.getString("name")+" password:"); out.println(rs.getString("password")); } out.println("</pre>"); //clear must do it rs.close(); stmt.close(); con.close(); }catch(Exception ex){ System.out.println(ex.getMessage()); }}//end execute public void clean(){ //释放资源,此处知识事例 request=null; out=null; }}帮我看看谢谢 你这个代码贴完全了吗?bean好像没打包阿 Bean类必需打包,最好不要把类名设为useBean <jsp:useBean id="instanceName" class="fullPackageName.BeanName"/><% //use: instanceName.methodName([parameter1[,parameter2,..]]);%> 放在tomcat\webapps\ROOT\WEB-INF\classes 不是不要打包吗 ? 怎么没人和我说下 在tomcat\webapps\ROOT\WEB-INF\classes 下用不用打包 嘿嘿,这次就知道了tomcat中的打包 Gson解析的问题 各位高手帮帮忙吧!关于异步文件上传的问题! 读取list的值,在线等各位帮忙 哪位知道这段话是什么意思??拜托了 在线等,马上结分 spring 中的事物提交 有关MYSQL的下载、安装问题,请大家进来看看、、、 java里面如何定义一个类的属性? 请问weblogic下如何建db2的连接池? EJB的问题,高手指引, 求解大神 谁有JAVA做的计算器的源代码给我发一个好吗??[email protected] 最菜的问题:如何配置tomcat
useBean.jsp
<html>
<jsp:useBean id="atest" class="useBean"/>
<head><title>useBean.jsp</title></head>
<body>
<%
atest.init();
atest.execute();
atest.clean();
%>
</body>
</html>
调用的bean为:
import java.sql.*;
import javax.servlet.*;
import javax.servlet.jsp.*;
public class useBean{
ServletRequest request;
JspWriter out; public void useBean(){}
public void init(ServletRequest req,JspWriter ou){
//初始化
requst=req;
out=ou;
}
public void execute(){
//Get parameters from request
String name,pwd;
name=request.getParameter("name");
pwd=request.getParameter("pwd");
try{
//add infomation to DB
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con=DriverManager.getConnection("jdbc:odbc:JSPTEST");
Statement stmt=con.createStatement();
stmt.executeUpdate("insert into zhuche values('"+name+"','"+pwd+"')");
//query DB for display all users
ResultSet rs=stmt.executeQuery("select * frm zhuche");
out.println("<pre>");
out.println("All user in DB!");
while(rs.next()){
out.print("user name:");
out.print(rs.getString("name")+" password:");
out.println(rs.getString("password"));
}
out.println("</pre>");
//clear must do it
rs.close();
stmt.close();
con.close();
}catch(Exception ex){
System.out.println(ex.getMessage());
}
}//end execute
public void clean(){
//释放资源,此处知识事例
request=null;
out=null;
}
}
帮我看看谢谢
<%
//use:
instanceName.methodName([parameter1[,parameter2,..]]);
%>