I am trying to retrieve data from MySQL database table. To do that, I use following code on various platforms. My code works perfectly on Windows and Linux platforms. But when I use same code in AIX 6.1, it does not retrieve correct data.
The Main Function:
String storedstring = objDBUtil.lookup(0);
logger.info(storedstring);
The Database Util Function:
public String lookup(String number) throws Exception {
String sql = "SELECT info FROM records WHERE Snumber=?";
Connection dbConn = connect();
try {
PreparedStatement stmt = dbConn.prepareStatement(sql);
try {
stmt.setString(1, number);
ResultSet rs = stmt.executeQuery();
try {
if (!rs.next()) {
throw new TException("does not exist in the database");
}
return rs.getString(1);
} catch (Exception e) {
logger.info("Unexpected exception caught during auth: " + e.getClass().toString() + " " + e.getMessage());
return null;
}finally {
rs.close();
}
} finally {
stmt.close();
}
} finally {
dbConn.close();
}
}
Output of the main function on Windows, I get the entire string from the database. But exact code gives me encrypted value on AIX machine.
Output on AIX machine [B#62637268
I resolved the issue. Issue was with connector file. I was using older version of connector file.
MySQL version I was using:
mysql-5.5.2-m2-aix5.3-powerpc-64bit
Non working version of Mysql connector with above mysql:
mysql-connector-java-3.1.7-bin.jar
Working version of MySQL connctor with above mysql:
New version: mysql-connector-java-5.1.6-bin.jar
Thank you everyone for looking into my question and trying to help me. Really appreciated.
Related
I am trying to add records to a table in an HSQL database through Java.
I have an HSQL database I made through OpenOffice, renamed the .odb file to .zip and extracted the SCRIPT and PROPERTIES files (It has no data in it at the moment) to a folder "\database" in my java project folder.
The table looks like this in the SCRIPT file
CREATE CACHED TABLE PUBLIC."Season"("SeasonID" INTEGER GENERATED BY DEFAULT AS IDENTITY(START WITH 0) NOT NULL PRIMARY KEY,"Year" VARCHAR(50))
All fine so far, the database connects just fine in Java with this code:
public void connect(){
try{
String dbName = "database\\db";
con = DriverManager.getConnection("jdbc:hsqldb:file:" + dbName, // filenames prefix
"sa", // user
""); // pass
}catch (Exception e){
e.printStackTrace();
}
}
I have the following code to insert a record into "Season".
public void addSeason(String year){
int result = 0;
try {
stmt = con.createStatement();
result = stmt.executeUpdate("INSERT INTO \"Season\"(\"Year\") VALUES ('" + year + "')");
con.commit();
stmt.close();
}catch (Exception e) {
e.printStackTrace();
}
System.out.println(result + " rows affected");
}
I have a final function called printTables():
private void printTables(){
try {
stmt = con.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * FROM \"Season\"");
System.out.println("SeasonID\tYear");
while(rs.next()){
System.out.println(rs.getInt("SeasonID") + "\t\t" + rs.getString("Year"));
}
}catch (Exception e) {
e.printStackTrace(System.out);
}
}
Now if I run this sequence of functions:
connect();
printTables();
addSeason("2010");
printTables();
I get this output:
SeasonID Year
1 rows affected
SeasonID Year
0 2010
Now when I close the program and start it again I get exactly the same output. So the change made during the first run hasn't been saved to the database. Is there something I'm missing?
It's caused by write delay params in hsqldb, by default has 500ms delay synch from memory to files.
So problem is solved when it's set to false
statement.execute("SET FILES WRITE DELAY FALSE");
or set as you like based on your app behaviour.
So my workaround is to close the connection after every update, then open a new connection any time I want to do something else.
This is pretty unsatisfactory and i'm sure it will cause problems later on if I want to perform queries mid-update. Also it's a time waster.
If I could find a way to ensure that con.close() was called whenever the program was killed that would be fine...
I am trying to figure out why my code is getting sent to the exception catch block and how to make this part of my log-in work correctly. The problem seems to be in Class.forName(driver); While debugging I noticed that I get an error, "variable source not available, source compiled with-out g-option". Is this the reason my code will not move onto the next step? if it is what do I need to fix it, and what does it mean?
I do have imported in my program.....
import java.sql.*;
import javax.swing.JOptionPane;
import java.sql.DriverManager;
private void SubmitActionPerformed(java.awt.event.ActionEvent evt) {
try {
String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
Class.forName(driver);
String db = "jdbc:odbc:db1.mdb";
con = DriverManager.getConnection(db);
st = con.createStatement();
System.out.println("it actually ready this set of code!");
String un = UserName.getText().trim();
String pw = Password.getText().trim();
String sql = "select user,pass from Table2 where user='"+un+"'and pass='"+pw+"'";
rs=st.executeQuery(sql);
int count = 0;
while(rs.next()){
count = count+1;
}
if (count==1){
JOptionPane.showMessageDialog(null,"User, Found Access Granted!");
}
else if (count>1){
JOptionPane.showMessageDialog(null,"Duplicate User, Access Denied!");
}
else {
JOptionPane.showMessageDialog(null, "user doesn't exsist. ");
}
} catch (Exception ex){
System.out.println("exception 2 ");
}
// TODO add your handling code here:
}
Try removing .mdb from String db = "jdbc:odbc:db1.mdb";
and simply write String db = "jdbc:odbc:db1";
This might work for you!
Note this is gonna work on or below Java runtime 7 only
Since Java 8, the JDBC-ODBC Driver support has been removed. You can still do something like this to connect to MSAccess DB if you want.
Alternatively, you can use one of the many databases for which free JDBC drivers are available, like MySQL, PostgreSQL, SQLServer etc.
Get database connection object as below:
String database = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=db1.mdb;";
Connection conn = DriverManager.getConnection(database, "", "");
Also add code to print exception stack trace:
catch (Exception ex) {
System.out.println("exception 2 ");
ex.printStackTrace();
}
I'm using the H2 database in my Java project (embedded mode).
On my computer at home everything works, the connection can be established, but on all other computers I always receive the following error:
org.h2.jdbc.JdbcSQLException: Table "CUSTOMERS" not found; SQL
statement: SELECT * FROM CUSTOMERS [42102-162]
I'm sure, that within the DB everything is alright, it should be something with the connection.
But even if I import the h2-1.3.162.jar file, the error still remains.
String dbClass = "org.h2.Driver";
String dbDriver = "jdbc:h2:~/cc";
String user = "user1";
String pass = "test1";
private Connection conn = null;
private Statement stmt = null;
private ResultSet rs = null;
public void connect() {
boolean done = false;
//load driver
try {
Class.forName(dbClass).newInstance();
System.out.println("driver loaded"); // This is shown in the Compiler
} catch (Exception ex) {
System.out.println("error while loading driver");
System.err.println(ex);
}
// Connection
try {
conn = DriverManager.getConnection(dbDriver, user, pass);
System.out.println("connected"); // This is shown in the Compiler
done = true;
} catch (SQLException ex) {
System.out.println("SQLException: " + ex.getMessage());
System.out.println("SQLState: " + ex.getSQLState());
System.out.println("VendorError: " + ex.getErrorCode());
}
}
public Vector select() {
data = new Vector();
try {
stmt = conn.createStatement();
rs = stmt.executeQuery("SELECT * FROM CUSTOMERS");
while (rs.next()) {
Vector row = new Vector();
row.add(rs.getInt("id"));
row.add(rs.getString("fname"));
row.add(rs.getString("lname"));
row.add(rs.getString("street"));
row.add(rs.getString("city"));
row.add(rs.getString("zip"));
row.add(rs.getString("state"));
row.add(rs.getString("phone"));
row.add(rs.getString("birthday"));
row.add(rs.getString("email"));
row.add(rs.getInt("code"));
data.add(row);
}
rs.close();
stmt.close();
} catch (SQLException ex) {
System.out.println("error while selecting"); // I receive this error
System.err.println(ex);
}
return data;
}
The problem isn't with your connection as you'd receive an exception well before then if it was failing to connect to the database. The exception is pretty clear about what the issue is, as well - it can't find the CUSTOMERS table. That could be because the table doesn't exist at all, or the connection is pointing at the wrong database; try putting in the full schema information of the table, rather than just its name, and see if that works.
I'm sure, that within the DB everything is alright, it should be
something with the connection. But even if I import the h2-1.3.162.jar
file, the error still remains.
Check your assumptions. This one is incorrect.
There's nothing in the message to suggest that you couldn't connect. Either you connected to the wrong database OR the one you did connect to didn't CREATE TABLE CUSTOMERS. (Should be named CUSTOMER, not plural.)
You'll fix your error faster if you stop assuming that everything you did is correct. You should be assuming that everything is wrong.
I'd print the stack trace when you catch that exception. It'll give you more information.
Finally I figured it out!
It had nothing to do with my tables, the database couldn't be found. When trying to connect to a database which can't be found with String dbDriver = "jdbc:h2:~/cc";, a new database with the name cc (in my case) will be created (of course an empty one with no tables) and the connection is established. That's why I haven't received any connection errors.
In the next step I tried to retrieve some data from the new created empty database and therefore received the error, that my table doesn't exist.
So I changed this line: String dbDriver = "jdbc:h2:file:lib/cc"; and copied into the lib directory of my application my old database cc.h2.db.
That's all!
PS: Here is a similiar problem: h2 (embedded mode ) database files problem
I am using the SphinxQL MySQL client which stores indexes as "tables" but has no real notion of a "database"...One specifies the port (9306 in my case) at which the sphinx mysql instance listens and in theory should be able to communicate as normal.
I have the following test code:
import java.sql.*;
public class Dbtest {
public static void main (String[] args) {
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:9306",
"user","password");
con.setReadOnly(true);
Statement stmt = con.createStatement();
ResultSet res = stmt.executeQuery("SELECT * from index_turned_table");
while (res.next()) {
String stuff1 = res.getString(1);
String stuff2 = res.getString(2);
System.out.println("Adding " + stuff1);
System.out.println("Adding " + stuff2);
}
res.close();
stmt.close();
con.close();
}
catch(Exception e)
{
System.out.println (e);
}
}
Upon execution, the code just hangs and does nothing and doesn't print out an exception. What are useful things I can do to figure this out or if any one has direct experience what might be going on?
This work with 1.10-beta http://www.olegsmith.com/2010/12/scalalift-sphinxql.html
and not work with 2.0.1-beta. Use mysql-connector-java 5.1.15.
Your SphinxQL instance is listening on port 9306. Your MySQL is listening on some other port, likely on the default 3306. You can use MySQL JDBC driver to connect to MySQL, but you cannot use it to connect to SphinxQL. It just doesn't understand JDBC driver communication protocol.
for a school database project we are making a database program (user GUI and the database). Using Microsoft Access 2010 I created the database and populated it with some sample data, and saved it in .mdb format and placed it in my project folder.
When running it in eclipse the following code works fine, connects and even retrieves the query. However I find that I am unable to export the code to a jar and run it (which is required for the project, give them a working copy of your program on a CD or flash drive), and I'm also unable to port the code over to Netbeans to have it work, as well as trying to compile on a Linux machine.
I assume this is a problem with including drivers or trying to use Microsoft access. The error I get when running the jar or running on Netbeans is given below the code. So I ask either how do I include drivers to make the program portable, or how else can I approach this problem?
Thanks in advance
import java.sql.*;
public class JDBCTest {
static Connection connection;
static Statement statement;
public static void main(String args[]){
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver").newInstance();
String database = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=TLDATABASEDBM.mdb";
connection = DriverManager.getConnection( database ,"","");
buildStatement();
executeQuery();
}catch(Exception e){
e.printStackTrace();
System.out.println("Error!");
}
}
public static void buildStatement() throws SQLException {
statement = connection.createStatement();
}
public static void executeQuery() throws SQLException {
boolean foundResults = statement.execute("SELECT * FROM tblStaff AS x WHERE City='Calgary'");
if(foundResults){
ResultSet set = statement.getResultSet();
if(set!=null) displayResults(set);
}else {
connection.close();
}
}
public static void displayResults(ResultSet rs) throws SQLException {
ResultSetMetaData metaData = rs.getMetaData();
int columns=metaData.getColumnCount();
String text="";
while(rs.next()){
for(int i=1;i<=columns;++i) {
text+=""+metaData.getColumnName(i)+":\t";
text+=rs.getString(i);
//text+="</"+metaData.getColumnName(i)+">";
text+="\n";
}
text+="\n";
}
System.out.println(text);
}
}
The error mentioned above:
java.sql.SQLException: [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified
at sun.jdbc.odbc.JdbcOdbc.createSQLException(JdbcOdbc.java:6957)
at sun.jdbc.odbc.JdbcOdbc.standardError(JdbcOdbc.java:7114)
at sun.jdbc.odbc.JdbcOdbc.SQLDriverConnect(JdbcOdbc.java:3073)
at sun.jdbc.odbc.JdbcOdbcConnection.initialize(JdbcOdbcConnection.java:323)
at sun.jdbc.odbc.JdbcOdbcDriver.connect(JdbcOdbcDriver.java:174)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:207)
at tldatabase.DataConnect.makeConnection(DataConnect.java:35)
at tldatabase.Main.main(Main.java:24)
I know the post was years ago but I felt like answering the question for those who are just experiencing this right now. It took me a while to know the answer to the question so here's the solution:
http://wiki.netbeans.org/FaqSettingHeapSize
Follow the "Running the 32-bit JVM".
All you have to do is find the netbeans.conf in the installation folder of your netbeans and change the directory from something like this:
netbeans_jdkhome="C:\Program Files\Java\jdk1.6.0_24"
to this:
netbeans_jdkhome="C:\Program Files (x86)\Java\jdk1.6.0_21"
The problem is netbeans might be running in 64 bit but MS Access only support 32-bit. So doing this would hopefully solve the problem. Also make sure to install this:
http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=23734
The main problem lies in the line:
String database = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=TLDATABASEDBM.mdb";
Make sure that the .mdb file is in the correct directory.
Check the file extension as .mdb or .mdbacc.
Also, if you want to use the same DSN every time, it is better to add the DSN(Data Source Name) into the respective system on which the mdb is stored.
I think that your app do not see TLDATABASEDBM.mdb in current directory. You can give full path to this file in connection string or add system DSN in ODBC Manager and then connect to it with connection string like: jdbc:odbc:TLDATABASEDBM
Honestly, I dont like what I am going to say... but, it solved the same issue for me... mysteriously... :(((
on the line where you are defining the database variable, I changed ...(.mdb)... into ...(.mdb, *.accdb)...
All the best for figuring out what difference that made!
package javaapplication1;
import java.sql.*;
public class MSaccess_archive {
public static void main(String[] args) {
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
// set this to a MS Access DB you have on your machine
String filename = "mdbTEST.mdb";
String database = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=";
database+= filename.trim() + ";DriverID=22;}"; // add on to the end
// now we can get the connection from the DriverManager
Connection con = DriverManager.getConnection( database ,"","");
Statement stmt = con.createStatement();
stmt.execute("select * from student"); // execute query in table student
ResultSet rs = stmt.getResultSet(); // get any Result that came from our query
if (rs != null)
while ( rs.next() ){
System.out.println("Name: " + rs.getInt("Age") + " ID: "+rs.getString("Course"));
}
stmt.close();
con.close();
}
catch (Exception err) {
System.out.println("ERROR: " + err);
}
}
}