Java: database connection. Where is my mistake? - java

Hy!
I really need your help. I'm trying to connect a database to a java program. This is my first time, so I have no idea what i'm doing.
My sql server: Sql server
I want to connect the Test database to the java program.
I tried the following code:
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection conn = null;
conn = DriverManager.getConnection("jdbc:mysql:WIN2CNG9\\SQLEXPRESS:3306/Test", "win2cng9\\kmim1437", "");
conn.close();
The error:
Exception in thread "main" java.sql.SQLException: No suitable driver found for jdbc:mysql:WIN2CNG9\SQLEXPRESS:3306/Test
at java.sql.DriverManager.getConnection(DriverManager.java:689)
at java.sql.DriverManager.getConnection(DriverManager.java:247)
at javaapplication42.JavaApplication42.main(JavaApplication42.java:24)
Java Result: 1
What is my mistake?
Thank you for any help.

Class.forName("oracle.jdbc.driver.OracleDriver");
DriverManager.getConnection("jdbc:mysql:
Why your use Oracle driver with mysql database? Use following code:
Class.forName("com.mysql.jdbc.Driver");
Connection conn = null;
conn = DriverManager.getConnection("jdbc:mysql:WIN2CNG9\\SQLEXPRESS:3306/Test", "win2cng9\\kmim1437", "");
conn.close();

Related

Exception: java.sql.SQLException: No suitable driver found for jdbc:ucanaccess

Getting exception in my java code
Exception:
java.sql.SQLException: No suitable driver found for jdbc:ucanaccess:C:\Users\mindurka\Desktop\SeleniumWorkspace\TestCaseSheet\TestCaseSheet.mdb;
Class.forName("net.ucanaccess.jdbc.UcanaccessDriver");
System.setProperty("DUCANACCESS_HOME","C:/Users/mindurka/Downloads/Selenium3.4/UCanAccess-4.0.2-bin/UCanAccess-4.0.2-bin");
String connURL = "jdbc:ucanaccess:"+TestCaseSheetPath+";";
Connection objAccessCon = DriverManager.getConnection(connURL);
Have included all the five jars in the source folder in my library set
C:\UCanAccess-4.0.2-bin\UCanAccess-4.0.2-bin
I do not understand the reason behind this. Kindly help.
jdbc:ucanaccess:C:\Users\mindurka\Desktop\SeleniumWorkspace\TestCaseSheet\TestCaseSheet.mdb
is not a valid connection URL. It needs to begin with
jdbc:ucanaccess://
followed by the path to the database file.
My Bad.. I missed a double forward slash in the connection string. It should be ...
Class.forName("net.ucanaccess.jdbc.UcanaccessDriver");
System.setProperty("DUCANACCESS_HOME","C:/Users/mindurka/Downloads
/Selenium3.4/ UCanAccess-4.0.2-bin/UCanAccess-4.0.2-bin");
String connURL = "jdbc:ucanaccess:**//**"+TestCaseSheetPath;
Connection objAccessCon = DriverManager.getConnection(connURL);
Connection objAccessConData = DriverManager.getConnection(connURL1);
Statement objRS = objAccessCon.createStatement();

Connection to two different databases in single class

I need to connect to two different database from my code. First is Hive database and another one is Oracle. For this purpose I need to load two different drivers one for Hive and another for Oracle. Here is what I did:
Class.forName("org.apache.hive.jdbc.HiveDriver");
System.out.println("Driver Found");
Connection connection = DriverManager.getConnection(
"jdbc:hive2://10.8.219.36:10000/default", "lab", "lab");
System.out.println("Connection established");
System.out.println("------------------");
Class.forName("oracle.jdbc.driver.OracleDriver");
System.out.println("Driver Found");
Connection connection1 = DriverManager.getConnection(
"jdbc:oracle:thin:#97.253.16.117:1521:NATTDB11",
"CDR_LOADER", "CDR_LOADER");
System.out.println("Connection established");
and when I am running the above code, this is what is got error:
Driver Found
Connection established
------------------
Driver Found
java.lang.IllegalArgumentException: Bad URL format
at org.apache.hive.jdbc.Utils.parseURL(Utils.java:185)
at org.apache.hive.jdbc.HiveConnection.<init>(HiveConnection.java:84)
at org.apache.hive.jdbc.HiveDriver.connect(HiveDriver.java:104)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at Demo.main(Demo.java:17)
How do I do this? Thank you in advance.
Try to explicitly register both drivers using:
DriverManager.registerDriver (new oracle.jdbc.driver.OracleDriver());
DriverManager.registerDriver (new org.apache.hive.jdbc.HiveDriver());
Then test both Connection types.

JDBC connection not happening [duplicate]

This question already has answers here:
Connect Java to a MySQL database
(14 answers)
Closed 7 years ago.
Below is the code I used for jdbc connection
String dbUrl="jdbc:mysql://localhost:3306/mysql";
String user= "kumar";
String pwd="ratiol";
try (Connection connection = DriverManager.getConnection(dbUrl, user, pwd)) {
System.out.println("Database connected!");
} catch (SQLException e) {
throw new IllegalStateException("Cannot connect the database!", e);
}
but I got error as below-
Exception in thread "main" java.lang.IllegalStateException: Cannot connect the database!
at jdbcConnection.Jdbcdemo.main(Jdbcdemo.java:22)
Caused by: java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/mysql
at java.sql.DriverManager.getConnection(DriverManager.java:596)
at java.sql.DriverManager.getConnection(DriverManager.java:215)
at jdbcConnection.Jdbcdemo.main(Jdbcdemo.java:19)
Can you please tell me how can I get jdbc url?
I am using eclipse(mars) in ubuntu 14.04
if you are using netbeans, right click project -->properties -->libraries-->add library and select MySQL JDBC Driver
just add the com.mysql.jdbc.Driver to the lib folder in you program files.
This is what you wrote
try (Connection connection = DriverManager.getConnection(dbUrl, user, pwd)) {
System.out.println("Database connected!");
} catch (SQLException e) {
throw new IllegalStateException("Cannot connect the database!", e);
}
it would be like this:
Connection con = null;
try {
//registering the jdbc driver here, your string to use
//here depends on what driver you are using.
Class.forName("something.jdbc.driver.YourFubarDriver");
Connection connection = DriverManager.getConnection(dbUrl, user, pwd)
} catch (SQLException e) {
throw new RuntimeException(e);
}
Please check Class.forName not more needed when using JDBC v.4
Let's take a quick look at how we can use this new feature to load a
JDBC driver manager. The following listing shows the sample code that
we typically use to load the JDBC driver. Let's assume that we need to
connect to an Apache Derby database, since we will be using this in
the sample application explained later in the article:
Class.forName("org.apache.derby.jdbc.EmbeddedDriver");
Connection conn =
DriverManager.getConnection(jdbcUrl, jdbcUser, jdbcPassword);
But in JDBC 4.0, we don't need the Class.forName() line. We can
simply call getConnection() to get the database connection.
Note that this is for getting a database connection in stand-alone
mode. If you are using some type of database connection pool to manage
connections, then the code would be different.
There are plenty of reason for the exception No suitable driver found for jdbc:mysql like
Your JDBC URL can be wrong.
ClassPath/BuildPath/Lib folder missing the connector jar.
Driver Information is Wrong.
Just load the driver first:
Class.forName("com.mysql.jdbc.driver");

Unable to connect to SQL server on localhost

i just keep getting Connection Failed, i dont know why, im running a server on UniServerZ and trying to get the SQL file from localhost.
Im using uniserverZ (Unicontroller.exe) and i made the .sqlite file using SQLite manager addon for firefox. Anyone can help me out here? Thanks!
Edit: Ok, now im just trying to load the sqlite file from my C drive, i have commented out the command that would load it from my localhost because it doesnt work either. Any help?
package ui;
import java.sql.*;
import javax.swing.*;
public class MySQLConnect {
Connection conn=null;
public static Connection ConnectDb(){
try{
Class.forName("org.sqlite.JDBC");
Connection conn = DriverManager.getConnection("jdbc:sqlite:C:\\UniServerZ\\home\\Database\\db");
// Connection conn = DriverManager.getConnection("jdbc:mysql:\\localhost:3306\\Database\\db\\student.sql","root","root");
JOptionPane.showMessageDialog(null, "Connection Successful!");
return conn;
} catch(Exception e){
JOptionPane.showMessageDialog(null, "Connection Failed");
return null;
}
}
}
This connection is strange
jdbc:mysql://localhost:3306//Database//student.sql
try
"jdbc:mysql://localhost:3306/Database",userName,password
where Database is the real data base name.
Note also single / vs //
You work with Sqlite database but used the jar of Mysql..
So correct this line.
String driver = "com.mysql.jdbc.Driver";
to
String driver = "org.sqlite.JDBC";
Change url and add the sqlite jdbc driver to succesfull connection with Sqlite DB.
And remove one / from below line after . jdbc:sqlite: need only / .
Connection conn = DriverManager.getConnection("jdbc:sqlite://localhost/Database/db/database.sqlite");
Thanks..

Connecting to mySQL Database with Java

In my program I am trying to connect to a mySQL database. This program is written in Java.
I am trying to connect to my database with this code here (? is a place holder b/c I dont know what does there.)
Connection conn = DriverManager.getConnection("jdbc:sqlite:*?*");
I need someone to help me replace the ? to connect to my database. I know the IP (Just call it ***.***.*** for security reasons, the port which is 3306 and the database is called devicede_Test).
Please help me replace the ? with the correct string with the info above, thanks!
Try this
Connection conn = DriverManager.getConnection("jdbc:mysql://***.***.***:3306/dbname");
Try this:
String url = "jdbc:mysql://localhost:3306/mysql";
Connection con = DriverManager.getConnection(url,"root", "");
SQLIte is not the right driver here. Use:
Connection conn = DriverManager.getConnection("jdbc:mysql://**.***.***.***/devicede_Test", user, pass);
The JDBC URL format for MySQL Connector/J is as follows, with items in square brackets ([, ]) being optional:
jdbc:mysql://[host][,failoverhost...][:port]/[database] ยป
[?propertyName1][=propertyValue1][&propertyName2][=propertyValue2]...
Here is a sample connection URL:
jdbc:mysql://localhost:3306/sakila?profileSQL=true
Source : http://dev.mysql.com/doc/refman/5.0/en/connector-j-reference-configuration-properties.html

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