分别用java Application 及 JSP调用javaBean的例子

2022-07-15 80酷酷网 80kuku.com

　　application|js//java bean
//file name: faq.java
import java.sql.*;

public class faq {
    String sDBDriver = "sun.jdbc.odbc.JdbcOdbcDriver";
    String sConnStr = "jdbc:odbc:faq";
    Connection conn = null;
    ResultSet rs = null;

    public faq() {
    try {
        Class.forName(sDBDriver);
    }catch(java.lang.ClassNotFoundException e) {
        System.err.println("faq(): " + e.getMessage());
    }
}

    public ResultSet executeQuery(String sql) {
        rs = null;
        try {
            conn = DriverManager.getConnection(sConnStr);
            Statement stmt = conn.createStatement();
            rs = stmt.executeQuery(sql);
        }catch(SQLException ex) {
            System.err.println("aq.executeQuery: " + ex.getMessage());
        }
        return rs;
    }
}

//java Application
//file name: testfaq.java
import java.sql.*;
class getRs
{
    public static String Answer;
    public static String Subject;
    public static String[][] rsArray = new String[9][2];;
    public static int n = 0;
    getRs(){
        try    {
            faq workM = new faq();
            ResultSet oRs = workM.executeQuery("SELECT * FROM faq");
            //System.out.println(oRs.getCount());
            while (oRs.next()){
            System.out.println(oRs.getString("Answer"));
            System.out.println(oRs.getString("Subject"));
            n=n+1;
            }
        }catch (SQLException ex)
        {
            System.out.println("error:"+ex);
        }
    }
}

public class testfaq {
    public static void main(String[] args) {
        getRs aa = new getRs();
    }
}

//jsp
//file name: testfaq.jsp

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>我的FAQ !</title>
</head>
<body>
<p><b>这是我的FAQ!</b></p>
<% page contentType="mimeType; charset=gb2312"%>
<% page language="java" import="java.sql.*" %>

<%
faq workM = new faq();
ResultSet RS = workM.executeQuery("SELECT * FROM faq");
String tt;
while (RS.next()) {
tt = RS.getString("Answer");
out.print("<LI>" + RS.getString("Subject") + "</LI>");
out.print("<pre>" + tt + "</pre>");
}
RS.close();
%>
</body>
</html>