<%@ page language="java" contentType="text/html;charset=GB2312"%>
<%@ page import="java.sql.*"%>
<%@ page import="com.firm.Firm"%><html>
<head>
<title>Insert title here</title>
</head>
<body>
<jsp:useBean id="addBean" scope="page" class="com.firm.Firm "/>
<%
String name = new String(request.getParameter("name").getBytes("8859_1"));
String emote = new String(request.getParameter("emote").getBytes("8859_1"));
String content = new String(request.getParameter("content").getBytes("8859_1"));
String strsql = "insert into guestbook (name,emote,content) values ('" + name + "','" + emote +"','" + content + "')";
addBean.executeUpdate(strsql);
out.print("您的留言已经保存到数据库中，谢谢！");
%>
</body>
</html>老是提示说org.apache.jasper.JasperException: /ok_guest.jsp(18,0) The value for the useBean class attribute com.firm.Firm is invalid.而且Firm.class也是放在 WEB-INF\classes\com\firm 下的
<%@ page import="java.sql.*"%>
<%@ page import="com.firm.Firm"%><html>
<head>
<title>Insert title here</title>
</head>
<body>
<jsp:useBean id="addBean" scope="page" class="com.firm.Firm "/>
<%
String name = new String(request.getParameter("name").getBytes("8859_1"));
String emote = new String(request.getParameter("emote").getBytes("8859_1"));
String content = new String(request.getParameter("content").getBytes("8859_1"));
String strsql = "insert into guestbook (name,emote,content) values ('" + name + "','" + emote +"','" + content + "')";
addBean.executeUpdate(strsql);
out.print("您的留言已经保存到数据库中，谢谢！");
%>
</body>
</html>老是提示说org.apache.jasper.JasperException: /ok_guest.jsp(18,0) The value for the useBean class attribute com.firm.Firm is invalid.而且Firm.class也是放在 WEB-INF\classes\com\firm 下的
/**
* @author Administrator
*
* TODO 要更改此生成的类型注释的模板，请转至
* 窗口 － 首选项 － Java － 代码样式 － 代码模板
*/
public class Firm {
String sDBDriver = "sun.jdbc.odbc,JdbcOdbcDriver";
String sConnstr = "jdbc:odbc:buxj";
private Connection conn = null;
private Statement stmt = null;
ResultSet rs= null;
//注册驱动程序
public Firm()
{
try
{
Class.forName(sDBDriver);
}
catch(java.lang.ClassNotFoundException e)
{
System.err.println("Firm():"+ e.getMessage());
}
}
//建立数据库连接，定义数据查询
public ResultSet executeQuery( String sql)
{
rs = null;
try
{
conn = DriverManager.getConnection(sConnstr);
stmt = conn.createStatement();
rs = stmt.executeQuery(sql);
}
catch(SQLException ex)
{
System.err.println("aq.executeQuery:" + ex.getMessage());
}
return rs;
}
public void executeUpdate(String sql)
{
stmt = null;
rs = null;
try
{
conn = DriverManager.getConnection(sConnstr);
stmt = conn.createStatement();
stmt.executeUpdate(sql);
stmt.close();
conn.close();
}
catch(SQLException ex)
{
System.err.println("aq.executeQuery:" + ex.getMessage());
}
}
public void closeStmt()
{
try
{
stmt.close();
}
catch(SQLException e)
{
e.printStackTrace();
}
}
public void closeConn()
{
try
{
conn.close();
}
catch(SQLException e)
{
e.printStackTrace();
}
}
}