SimpleBean Init Method
/*
Pro Spring
By Rob Harrop
Jan Machacek
ISBN: 1-59059-461-4
Publisher: Apress
*/
///////////////////////////////////////////////////////////////////////////////////////
//File: initMethod.xml
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="simpleBean1" class="SimpleBean" init-method="init">
<property name="name">
<value>Joe Wang</value>
</property>
<property name="age">
<value>100</value>
</property>
</bean>
<bean id="simpleBean2" class="SimpleBean" init-method="init">
<property name="age">
<value>100</value>
</property>
</bean>
<bean id="simpleBean3" class="SimpleBean" init-method="init">
<property name="name">
<value>Joe Wang</value>
</property>
</bean>
</beans>
///////////////////////////////////////////////////////////////////////////////////////
import org.springframework.beans.factory.BeanCreationException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;
public class SimpleBean {
private static final String DEFAULT_NAME = "Luke Skywalker";
private String name = null;
private int age = Integer.MIN_VALUE;
public void setName(String name) {
this.name = name;
}
public void setAge(int age) {
this.age = age;
}
public void init() {
System.out.println("Initializing bean");
if (name == null) {
System.out.println("Using default name");
name = DEFAULT_NAME;
}
if (age == Integer.MIN_VALUE) {
throw new IllegalArgumentException(
"You must set the age property of any beans of type " + SimpleBean.class);
}
}
public String toString() {
return "Name: " + name + "\nAge: " + age;
}
public static void main(String[] args) {
BeanFactory factory = new XmlBeanFactory(new FileSystemResource(
"build/initMethod.xml"));
SimpleBean simpleBean1 = getBean("simpleBean1", factory);
SimpleBean simpleBean2 = getBean("simpleBean2", factory);
SimpleBean simpleBean3 = getBean("simpleBean3", factory);
}
private static SimpleBean getBean(String beanName, BeanFactory factory) {
try {
SimpleBean bean =(SimpleBean) factory.getBean(beanName);
System.out.println(bean);
return bean;
} catch (BeanCreationException ex) {
System.out.println("An error occured in bean configuration: "
+ ex.getMessage());
return null;
}
}
}
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