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JDBC manages these three main programming activities: To connect to My SQL in Java, My SQL provides My SQL Connector/J, a driver that implements the JDBC API. The Type 4 designation means that the driver is a pure Java implementation of the My SQL protocol and does not rely on the My SQL client libraries. It is especially useful in a dynamic environment, where is a need for a lot of testing, debugging, securing data etc. In this tutorial, we use My SQL Connector/J 5.1.41, which is a maintenance release of the 5.1 production branch. In Java, the package com.zetcode.retrieve2; import is an API for the Java programming language that defines how a client may access a database. The usage of a data source improves application's performance and scalability. It provides methods for querying and updating data in a database. From a technical point of view, the API is as a set of classes in the package. Using a datasource has several advantages over the package com.zetcode.datasourceex; import com.jdbc2.optional. Column Headers Name Title Jack London Call of the Wild Jack London Martin Eden Honore de Balzac Old Goriot Honore de Balzac Cousin Bette Lion Feuchtwanger Jew Suess Emile Zola Nana Emile Zola The Belly of Paris Truman Capote In Cold blood Truman Capote Breakfast at Tiffany package com.zetcode; import Formatter; public class Column Headers $ java -cp bin:lib/* com.zetcode.columnheaders. You might also want to check Java tutorial, Postgre SQL Java tutorial, Apache Derby tutorial, My SQL tutorial, or Spring Jdbc Template tutorial on Zet Code. In this example, we connect to the database using a data source. The examples were created and tested on Ubuntu Linux.

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It contains information such as database type, database name, server name, and port number. Prepared2 1.05user 0.09system .80elapsed 3%CPU (0avgtext 0avgdata 42084maxresident)k 8inputs 88outputs (0major 16330minor)pagefaults 0swaps package com.zetcode.retrieve; import

The following is a syntax of a My SQL connection string: It is possible to specify multiple hosts for a server failover setup. If no host is specified, the host name defaults to localhost. Prepared statements are faster and guard against SQL injection attacks. Not Prepared 1.03user 0.13system .72elapsed 2%CPU (0avgtext 0avgdata 42548maxresident)k 0inputs 88outputs (0major 16368minor)pagefaults 0swaps package com.zetcode.prepared2; import

If the port for a host is not specified, it defaults to 3306, the default port number for My SQL servers. ├── bin │ └── com │ └── zetcode │ └── version │ └── Version.class ├── lib │ └── mysql-connector-java-5.1.41└── src └── com └── zetcode └── version └── 8 directories, 3 files USE testdb; DROP TABLE IF EXISTS Books, Authors, Testing, Images; CREATE TABLE Authors(Id BIGINT PRIMARY KEY AUTO_INCREMENT, Name VARCHAR(100)); CREATE TABLE Books(Id BIGINT PRIMARY KEY AUTO_INCREMENT, Author Id BIGINT, Title VARCHAR(100), FOREIGN KEY(Author Id) REFERENCES Authors(Id) ON DELETE CASCADE); CREATE TABLE Testing(Id INT); CREATE TABLE Images(Id INT PRIMARY KEY AUTO_INCREMENT, Data MEDIUMBLOB); INSERT INTO Authors(Id, Name) VALUES(1, 'Jack London'); INSERT INTO Authors(Id, Name) VALUES(2, 'Honore de Balzac'); INSERT INTO Authors(Id, Name) VALUES(3, 'Lion Feuchtwanger'); INSERT INTO Authors(Id, Name) VALUES(4, 'Emile Zola'); INSERT INTO Authors(Id, Name) VALUES(5, 'Truman Capote'); INSERT INTO Books(Id, Author Id, Title) VALUES(1, 1, 'Call of the Wild'); INSERT INTO Books(Id, Author Id, Title) VALUES(2, 1, 'Martin Eden'); INSERT INTO Books(Id, Author Id, Title) VALUES(3, 2, 'Old Goriot'); INSERT INTO Books(Id, Author Id, Title) VALUES(4, 2, 'Cousin Bette'); INSERT INTO Books(Id, Author Id, Title) VALUES(5, 3, 'Jew Suess'); INSERT INTO Books(Id, Author Id, Title) VALUES(6, 4, 'Nana'); INSERT INTO Books(Id, Author Id, Title) VALUES(7, 4, 'The Belly of Paris'); INSERT INTO Books(Id, Author Id, Title) VALUES(8, 5, 'In Cold blood'); INSERT INTO Books(Id, Author Id, Title) VALUES(9, 5, 'Breakfast at Tiffany'); script. The select * from Authors; ---- -------------------- | Id | Name | ---- -------------------- | 1 | Jack London | | 2 | Honore de Balzac | | 3 | Lion Feuchtwanger | | 4 | Emile Zola | | 5 | Truman Capote | | 6 | Trygve Gulbranssen | ---- -------------------- 6 rows in set (0.00 sec) We have a new author inserted into the table.

If you have to retrieve parameters back from a stored procedure, you must first register an out parameter by name or index by using the register Out Parameter method of the SQLServer Callable Statement class, and then assign the returned out parameter to an appropriate variable after you run the call to the stored procedure.

Dans l’exemple suivant, la méthode prepare Call est utilisée pour configurer l’appel à la procédure stockée, la méthode register Out Parameter est utilisée pour configurer le paramètre de sortie, puis le set String méthode est utilisée pour définir le paramètre pour le appel avant l’appel de méthode execute Query.

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