Spring — Programmatically approach | Code Factory
2 min readJan 27, 2021
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Create Java Project
- Open Eclipse
- Go to File -> New -> Others… -> Java Project
- Create BeanLifecycle project
- Right click on project -> Build Path -> Configure Build Path -> Libraries tab -> Add External JARs (Used 2.X jars)
- commons-logging-X.X.jar
- spring-beans-X.X.X.jar
- spring-context-X.X.X.jar
- spring-core-X.X.X.jar
- mysql-connector-java-X.X.X.jar - * You can find dtd information from spring-beans-X.X.X.jar -> org -> springframework -> beans -> factory -> xml -> spring-beans.dtd (line no 36 & 37)
spring.xml
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN"
"http://www.springframework.org/dtd/spring-beans-2.0.dtd"><beans>
<bean id="t" class="com.codeFactory.beans.Test" >
<property name="driver" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/test" />
<property name="username" value="root" />
<property name="password" value="root" />
</bean>
</beans>
Test.java
package com.codeFactory.beans;import java.sql.Connection;
import java.sql.DriverManager;import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;public class Test implements InitializingBean, DisposableBean { private String driver, url, username, password;
private Connection con; public void setDriver(String driver) {
this.driver = driver;
} public void setUrl(String url) {
this.url = url;
} public void setUsername(String username) {
this.username = username;
} public void setPassword(String password) {
this.password = password;
} @Override
public void afterPropertiesSet() throws Exception {
Class.forName(driver);
con = DriverManager.getConnection(url, username, password);
System.out.println("Connection: " + con + " opened");
} @Override
public void destroy() throws Exception {
con.close();
System.out.println("Connection closed");
}
}
Client.java
package com.codeFactory.test;import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;import com.codeFactory.beans.Test;/**
* @author code.factory
*
*/
public class Client {
public static void main(String... args) {
ConfigurableApplicationContext context = new ClassPathXmlApplicationContext("com/codeFactory/resources/spring.xml");
Test c = (Test) context.getBean("t");
context.close();
}
}
Output:
Connection: com.mysql.cj.jdbc.ConnectionImpl@2928854b opened
Connection closed