nicht angemeldet
jsp opbject abfüllen probleme
tach ich habe 2 jsps und 3 beans das erste jsp ruft das zweite auf. das zweite ruft die funktion getdata auf, bekommt das object data gefüllt und sollte es dan ausgeben, aber es funktioniert nicht...
index.jsp:
<html> <head> <title> :: Lehrmittel-Suche </title> <link rel="STYLESHEET" href="css/tss.css" type="text/css"> </head> <body>
<table border="0" width="100%" height="100%" cellspacing="0" cellpadding="0" align="center"> <tr> <td width="100%" valign="top" align="center" height="100%"> <form action="suchergebnisse.jsp" method="post"> <table border="0" width="600" cellspacing="1"> <tr> <td width="100%" colspan="4"><font face="Arial" size="2"> </font></td> </tr> <tr> <td width="600" bgcolor="#FF0066" align="center" colspan="4"><b><font color="#FFFFFF" size="2" face="Arial">Lehrmittel-Suche</font></b></td> </tr> <tr> <td width="600" colspan="4"><font face="Arial" size="2"> <img border="0" src="pic/TSSnet_Contents-Pfeil.gif"><a href="hilfe.html">Hilfe</a><br><br> </font></td> </tr> <tr> <td width="9"></td> <td width="191"><font face="Arial" size="2">ISBN-Nummer:</font></td> <td width="200"><font face="Arial" size="2"><input type="text" name="txtISBN" size="20" style="border: 1 solid #FF0080"></font></td> <td width="200"></td> </tr> <tr> <td width="9"></td> <td width="191"><font face="Arial" size="2">Titel:</font></td> <td width="200"><font face="Arial" size="2"><input type="text" name="txtTitel" size="20" style="border: 1 solid #FF0080"></font></td> <td width="200"></td> </tr> <tr> <td width="9"></td> <td width="191"><font face="Arial" size="2">Beschreibung:</font></td> <td width="200"><font face="Arial" size="2"><input type="text" name="txtBeschreibung" size="20" style="border: 1 solid #FF0080"></font></td> <td width="200"></td> </tr> <tr> <td width="9"></td> <td width="191"><font face="Arial" size="2">Autor:</font></td> <td width="200"><font face="Arial" size="2"><input type="text" name="txtAutor" size="20" style="border: 1 solid #FF0080"></font></td> <td width="200"></td> </tr> <tr> <td width="9"></td> <td width="191"><font face="Arial" size="2">Medium</font></td> <td width="200"><select size="1" name="ddmMedium" style="border: 1 solid #FF0080"> <option value="Buch">Buch</option> <option value="CD">CD</option> <option value="Dokumentation">Dokumentation</option> <option value="Diskette">Diskette</option> <option value="Heft">Heft</option> <option selected value=""></option> </select></td> <td width="200"></td> </tr> <tr> <td width="9"></td> <td width="191"></td> <td width="200"><br> <input type="submit" value="suchen" name="B1" style="background-color: #FFFFFF; border: 1 solid #FF0066"> <input type="reset" value=" reset " name="B2" style="background-color: #FFFFFF; border: 1 solid #FF0066"></td> <td width="200"></td> </tr> </table> </form> </td> </tr> </table> </body> </html>
schergebnisse.jsp:
<html> <head> <title> suchergebnisse </title> </head>
<jsp:useBean id="index" scope="session" class="lehrmittel.indexBean" /> <jsp:useBean id="db" scope="session" class="lehrmittel.DB" />
<body> <% Object[][] data = {}; data = db.getdata(0);
data = index.aufbereitung(data); out.println(data[0][0].toString()); %>
<% out.println("Autor" + request.getParameter("txtAutor")); request.getParameter("txtISBN"); request.getParameter("txtTitel"); request.getParameter("ddmMedium"); request.getParameter("txtBeschreibung"); %> </body> </html>
indexBean.java:
package lehrmittel;
import java.io.*;
public class indexBean implements Serializable { public DB Database = new DB(); Object[][] data = {};
private void writeObject(ObjectOutputStream oos) throws IOException { oos.defaultWriteObject(); } private void readObject(ObjectInputStream ois) throws ClassNotFoundException, IOException { ois.defaultReadObject(); }
public Object[][] aufbereitung(Object[][] data){ if(data.length > 0) { for(int i = 0; i < data[0].length; i++) { if(data[0][i] == null) data[0][i] = ""; } } return data; }
}
SQL.java:
package lehrmittel; public class SQL { public DB Database = new DB(); private final String[] SQLList = new String[9]; private String Temp_SQL = "";
public SQL() {
SQLList[0] = "select * from art;"; // SQLList[0] = "SELECT Lehrmittel.ISBN, art.art FROM art INNER JOIN ON art.art_nr "; //SQLList[0] += "= Lehrmittel.art_nr WHERE art.art = " + "'Buch'"; //Suche nach ISBN & Medium
SQLList[1] = "SELECT Lehrmittel.Titel, art.art FROM art INNER JOIN Lehrmittel ON "; SQLList[1] += "art.art_nr = Lehrmittel.art_nr WHERE Lehrmittel.Titel= " + "'Test'" + " AND art.art = " + "'Buch'"; //Suche nach Titel & Medium
SQLList[2] = "SELECT Lehrmittel.Autor, Lehrmittel.Titel, art.art FROM art INNER JOIN "; SQLList[2] += "Lehrmittel ON art.art_nr = Lehrmittel.art_nr WHERE "; SQLList[2] += "art.art = " + "'Buch'" + " AND Lehrmittel.Autor = " + "'Test'" + " AND Lehrmittel.Titel = " + "'Test'"; //Suche nach Titel & Autor & Medium
SQLList[3] = "SELECT Lehrmittel.Autor, art.art FROM art INNER JOIN Lehrmittel ON "; SQLList[3] += "art.art_nr = Lehrmittel.art_nr WHERE Lehrmittel.Autor = " + "'Test'" + " AND art.art = " + "'Buch'"; //Suche nach Autor & Medium
SQLList[4] = "SELECT Lehrmittel.Beschreibung. art.art FROM art INNER JOIN Lehrmittel "; SQLList[4] += "ON art.art_nr = Lehrmittel.art_nr WHERE Lehrmittel.Beschreibung = "; SQLList[4] += "'Test'" + " AND art.art = " + "'Buch'"; //Suche nach Beschreibung & Medium
}
public String GetSQL(){ return Temp_SQL; }
public void SetSQL(int SQL_Nr) { Temp_SQL = SQLList[SQL_Nr]; }
}
db.java:
package lehrmittel;
import java.sql.*;
public class DB { private SQL SQLList = new SQL(); private Connection con; private Statement stmt; private ResultSet res;
//Standardkonstruktor public DB() {
}
public Object[][] getdata(int SQL_Nr) throws Exception { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); con = DriverManager.getConnection("jdbc:odbc:Lehrmittel"); stmt = con.createStatement(res.TYPE_SCROLL_INSENSITIVE , res.CONCUR_READ_ONLY);
//SetSQL() SQLList.SetSQL(SQL_Nr);
//GetSQL() res = stmt.executeQuery(SQLList.GetSQL());
int _rows = 0, _cols = 0;
switch(SQL_Nr) { case 0: case 1: case 3: case 4: _cols= 3;//2 break;
case 2: _cols = 4;//3 break; //Hier entsprechende Erweiterungen implementieren }
res.last(); _rows = res.getRow(); res.beforeFirst();
Object[][] RecordSet = new Object[_rows][_cols];
_rows = 0;
String[] _Temp = new String[_cols];
while(res.next()) { for(int loop=0; loop < _cols; loop++) _Temp[loop] = res.getString(loop+1);
Object[] Record = new Object[_cols];
for(int loop=0; loop < _cols; loop++) Record[loop] = _Temp[loop];
RecordSet[_rows++] = Record; }
res.close(); stmt.close(); con.close();
return RecordSet;
}
}