JDBC VS Hibernate [closed]

Answering issues listed above: 1. Hibernate cannot connect with an “Existing” database. It always try to create a one of its own. This is wrong. Hibernate can connect to an existing database, and it doesn’t always try to recreate it. You just should turn of parameter like hbm2ddl. auto. 2. Our database might access by … Read more

Performance of MySQL Insert statements in Java: Batch mode prepared statements vs single insert with multiple values

JDBC is simply a Java SE standard of database access offering the standard interfaces so you’re not really bound to a specific JDBC implementation. MySQL Java connector (Connector/J) is an implementation of the JDBC interfaces for MySQL databases only. Out of experience, I’m involved to a project that uses huge amount of data using MySQL, … Read more

JDBC – How to set char in a prepared statement

The JDBC Specification 4.0 in Appendix B (Data Type Conversion Tables) states the following conversions: This table also shows the conversions used by the SQLInput reader methods, except that they use only the recommended conversions. JDBC Type              Java Type ——————————————- CHAR                   … Read more

Understanding the concept behind Service provider framework like JDBC using the factory method

Consider something like the following: public interface MyService { void doSomething(); } public class MyServiceFactory { public static MyService getService() { try { (MyService) Class.forName(System.getProperty(“MyServiceImplemetation”)).newInstance(); } catch (Throwable t) { throw new Error(t); } } } With this code, your library doesn’t need to know about the implementations of the service. Users of your library … Read more

The TCP/IP connection to the host localhost, port 1433 has failed

You need to Go to Start > Microsoft SQL Server > Configuration Tools > SQL Server Configuration Manager When it opens Go to SQL Server Configuration Manager > SQL Server Network Configuration > Protocols for SQLExpress Where you’ll find the Protocol TCP/IP, if disabled then Enable it Click on TCP/IP, You’ll find its properties. In … Read more

Statement.execute(sql) vs executeUpdate(sql) and executeQuery(sql)

boolean execute(): Executes the SQL statement in this Prepared Statement object, which may be any kind of SQL statement. ResultSet executeQuery(): Executes the SQL query in this Prepared Statement object and returns the ResultSet object generated by the query. int executeUpdate(): Executes the SQL statement in this Prepared Statement object, which must be an SQL … Read more

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver MySQLConnector/J

It seems the mysql connectivity library is not included in the project. Solve the problem following one of the proposed solutions: MAVEN PROJECTS SOLUTION Add the mysql-connector dependency to the pom.xml project file: <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.39</version> </dependency> Here you are all the versions: https://mvnrepository.com/artifact/mysql/mysql-connector-java ALL PROJECTS SOLUTION Add the jar library manually to the … Read more

install MySQL JDBC driver msi

The msi installation places the file at C:\Program Files\MySQL\MySQL Connector J\mysql-connector-java-5.1.26-bin.jar. You can also download the platform independent zip file and extract the jar file whereever you want.