Mysql driver for java

The Type 4 drivers are also called pure Java drivers as they are completely written in Java. The Type 4 driver converts JDBC calls directly to the database-specific protocol with minimum conversions. Here we are adding hardcoded values just for checking but we can even write code to take data from the user. Introducing Java Data Access T Creating TinyCalculator web ap J2ME Specifications and other Back To Top.

Active Oldest Votes. Improve this answer. Yah, im coding old school lol, notepad and batch, so i guess ill add it to the batch — Cody. Add a comment. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science.

Stack Gives Back Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually. Related If there are no rows left, the method returns false. The getString method retrieves the value of a specified column. The first column has index 1. In case of an exception, we log the error message. For this console example, the message is displayed in the terminal. We run the program from the command line.

The Manen's -q option runs Maven in quiet mode; i. Next we are going to create database tables and fill them with data. These tables will be used throughout this tutorial. The tables are of InnoDB type. InnoDB databases support foreign key constraints and transactions. We place a foreign key constraint on the AuthorId column of the Books table. We fill the Authors and Books tables with initial data.

Now we will concern ourselves with prepared statements. When we write prepared statements, we use placeholders instead of directly writing the values into the statements. Prepared statements increase security and performance. Here we create a prepared statement. Prepared statements are faster and guard against SQL injection attacks. The prepared statement is executed. We use the executeUpdate method of the statement object when we don't expect any data to be returned.

For the following two examples, we will use the Testing table. We will execute a normal statement and a prepared statement times. We check if there is some difference in execution time. Next we will show how to retrieve data from a database table. We get all data from the Authors table. We execute a query that selects all columns from the Authors table.

We use the executeQuery method. The next method advances the cursor to the next record. It returns false when there are no more rows in the result set.

The getInt and getString methods retrieve the value of the designated column in the current row of this ResultSet object as an int and String of the Java programming language.

It is a common practice to put the configuration data outside the program in a separate file. This way the programmers are more flexible. We can change the user, a password or a connection url without needing to recompile the program. It is especially useful in a dynamic environment, where is a need for a lot of testing, debugging, securing data etc. In Java, the Properties is a class used often for this.

We have a db. These are dynamically loaded during the execution of the program. We connect to the testdb database and print the contents of the Authors table to the console. This time, we load the connection properties from a file. They are not hard coded in the proram. The Properties class is created. The data is loaded from the file called db. In this example, we connect to the database using a data source.

The usage of a data source improves application's performance and scalability. Using a datasource has several advantages over the DriverManager : increased portability, connection pooling, and distributed transactions.

It is possible to execute multiple SQL statements in one query. In the code example, we retrieve three rows from the Authors table. We enable multiple statements queries in the database URL by setting the allowMultiQueries parameter to true. We call the execute method of the prepared statement object. The method returns a boolean value indicating if the first result is a ResultSet object. Subsequent results are called using the getMoreResults method.

The processing of the results is done inside the do while loop. The ResultSet is retrieved with the getResultSet method call.