Connection Database
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This document discusses different methods for connecting to a database in J2EE, including using the Class.forName method, Hibernate configuration properties, JDBC 4.0, and passing connection properties. It provides code examples for connecting to common database types like MySQL, Oracle, and Derby using different connection approaches in J2EE.
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![J2EE Database Connection
Lakhani Kamlesh J.
+91 95 86 331823
[1 | P a g e ]
Lakhani Kamlesh J.
Kamal.lakhani56@gmail.com
Lakhani Kamlesh J.
Kamal.lakhani56@gmail.com
+91 95 863 31823
Topic J2EE
CONNECTION](https://image.slidesharecdn.com/connectiontable-140426040945-phpapp02/85/Connection-Database-1-320.jpg)
![J2EE Database Connection
Lakhani Kamlesh J.
+91 95 86 331823
[2 | P a g e ]
Lakhani Kamlesh J.
Kamal.lakhani56@gmail.com
Connection (Type – 1)
Class.forName(“write”); Connecton con = DriverManagemer.getConnection(“write”);
1 Microsoft
Access
sun.jdbc.odbc.JdbcOdbcDriver Jdbc:odbc:DB Name
2 Oracle oracle.jdbc.driver.OracleDriver "jdbc:oracle:thin:127.0.0.1:DB Name",
"username", "password"
3 My SQL com.mysql.jdbc.Driver "jdbc:mysql://localhost/DB Name", "username",
"password"
4
5
6
7
Connection – (Type – Hibernate)
1 <property name="hibernate.dialect">org.hibernate.dialect.DerbyDialect</property>
<property
name="hibernate.connection.driver_class">org.apache.derby.jdbc.ClientDriver</property>
<property name="hibernate.connection.url">jdbc:derby://localhost:1527/sample</property>
<property name="hibernate.connection.username">app</property>
<property name="hibernate.connection.password">app</property>
Connection – (Type – JDBC 4.0)
1 String databaseURL = "jdbc:mysql://localhost:3306/test?user=root&password=root123";
Connection conn = null;
try
{
conn = DriverManager.getConnection(databaseURL);
if (conn != null)
{
System.out.println("Connected to the database");
}
}
catch (SQLException ex)
{
System.out.println("An error occurred. Maybe user/password is invalid");
ex.printStackTrace();
}](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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There are three ways to connect to a database using JDBC: 1) using a URL, 2) using a user ID and password, and 3) using properties. The URL method passes the full JDBC URL, driver class, and credentials to establish the connection. The user ID/password method loads the driver class, gets the connection using the URL, user name, and password, then gets and executes a statement. The properties method loads the driver class, gets the connection using a properties map containing the user name and password, then gets metadata about a table including its columns and types.
J query
This document provides an overview of jQuery, a popular JavaScript library. It discusses what jQuery is, why it's useful, and some basic ways to use it. Specifically, jQuery is a lightweight JavaScript library that simplifies tasks like DOM manipulation, event handling, Ajax interactions and animation. It supports cross-browser compatibility and has a simple, CSS-like syntax. The document provides examples of how jQuery can be used to select elements, add/remove classes, handle events, and create basic animations.
High Performance Jdbc
The document discusses high performance JDBC and database optimization. It covers topics like persistence frameworks, JDBC drivers and connections, query performance, and tuning database and application design. Specific tips mentioned include using prepared statements, setting fetch sizes, closing resources, and leveraging database features like indexes and materialized views.
Java JDBC
JDBC (Java Database Connectivity) is an API that provides Java programs with the ability to connect to and interact with databases. It allows database-independent access to different database management systems (DBMS) using Java programming language. JDBC drivers are used to connect to databases and come in four types depending on how they interface with the database. The basic steps to use JDBC include registering a driver, connecting to the database, executing SQL statements, handling results, and closing the connection. Scrollable result sets and prepared statements are also introduced as advanced JDBC features.
Jdbc
JDBC (Java Database Connectivity) is an API that provides Java programs with the ability to connect to and interact with databases. It allows database-independent access to different database management systems (DBMS) using Java programming language. JDBC drivers are used to connect to databases and come in four types depending on how they interface with the database. The basic steps to use JDBC include registering a driver, connecting to the database, executing SQL statements, handling results, and closing the connection. Scrollable result sets and prepared statements are also introduced as advanced JDBC features.
4 jdbc step1
The document discusses obtaining a connection to a database in Java using JDBC. It provides code examples of creating a database connection using the DriverManager class and Oracle's JDBC Thin driver. The code inserts a record into an EMP table for demonstration purposes. Best practices for database connectivity in a Java project are then covered, such as using the DAO pattern to separate data access logic from business logic. This improves testability, reusability and flexibility in switching database types.
Java database connectivity
This document provides an overview of Java Database Connectivity (JDBC) including:
- JDBC provides a vendor-neutral way to connect Java applications to databases.
- It describes the basic components and architecture of JDBC including drivers, connections, statements, and result sets.
- It explains how to establish a connection to a database using JDBC including installing drivers, getting connections, executing queries, and processing result sets.
Day2
The document summarizes key topics from a lecture on database design for enterprise systems, including:
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2) Database security topics like authentication, authorization, and data encryption.
3) Characteristics of enterprise database environments including high availability, load balancing, clustering, replication, and integrating databases with continuous integration systems.
Jdbc
The document discusses the Java Database Connectivity (JDBC) API, which allows Java programs to connect to databases. It describes the basic steps to connect to a database, execute SQL statements, and retrieve and process result sets. It also covers transaction handling, metadata retrieval, and scrollable/updatable result sets.
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Connection Database
- 1. J2EE Database Connection Lakhani Kamlesh J. +91 95 86 331823 [1 | P a g e ] Lakhani Kamlesh J. Kamal.lakhani56@gmail.com Lakhani Kamlesh J. Kamal.lakhani56@gmail.com +91 95 863 31823 Topic J2EE CONNECTION
- 2. J2EE Database Connection Lakhani Kamlesh J. +91 95 86 331823 [2 | P a g e ] Lakhani Kamlesh J. Kamal.lakhani56@gmail.com Connection (Type – 1) Class.forName(“write”); Connecton con = DriverManagemer.getConnection(“write”); 1 Microsoft Access sun.jdbc.odbc.JdbcOdbcDriver Jdbc:odbc:DB Name 2 Oracle oracle.jdbc.driver.OracleDriver "jdbc:oracle:thin:127.0.0.1:DB Name", "username", "password" 3 My SQL com.mysql.jdbc.Driver "jdbc:mysql://localhost/DB Name", "username", "password" 4 5 6 7 Connection – (Type – Hibernate) 1 <property name="hibernate.dialect">org.hibernate.dialect.DerbyDialect</property> <property name="hibernate.connection.driver_class">org.apache.derby.jdbc.ClientDriver</property> <property name="hibernate.connection.url">jdbc:derby://localhost:1527/sample</property> <property name="hibernate.connection.username">app</property> <property name="hibernate.connection.password">app</property> Connection – (Type – JDBC 4.0) 1 String databaseURL = "jdbc:mysql://localhost:3306/test?user=root&password=root123"; Connection conn = null; try { conn = DriverManager.getConnection(databaseURL); if (conn != null) { System.out.println("Connected to the database"); } } catch (SQLException ex) { System.out.println("An error occurred. Maybe user/password is invalid"); ex.printStackTrace(); }
- 3. J2EE Database Connection Lakhani Kamlesh J. +91 95 86 331823 [3 | P a g e ] Lakhani Kamlesh J. Kamal.lakhani56@gmail.com Connection – (Type – Properties) 1 String databaseURL = "jdbc:mysql://localhost:3306/test"; Properties props = new Properties(); props.put("user", "root"); props.put("password", "root123"); conn = DriverManager.getConnection(databaseURL, props); Connection (Type – Derby) Class.forName(“write”); Connecton con = DriverManagemer.getConnection(“write”); 1 Derby org.apache.derby.jdbc.ClientDriver "jdbc:derby://localhost:1527/DB Name (DB Path) create=true; user=username; password=password"