Admin: 1 версия

2010-06-01T06:17:03Z

1 версия

в 18:01, 31 мая 2010

2010-05-31T18:01:44Z

Новая страница

== Init Interface ==



<source lang="java">
/*
Pro Spring
By Rob Harrop
Jan Machacek
ISBN: 1-59059-461-4
Publisher: Apress
*/

///////////////////////////////////////////////////////////////////////////////////////
//File: initInterface.xml
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="simpleBean1" class="SimpleBeanWithInterface" init-method="myInit">
<property name="name">
<value>Rob Harrop</value>
</property>
<property name="age">
<value>100</value>
</property>
</bean>
<bean id="simpleBean2" class="SimpleBeanWithInterface">
<property name="age">
<value>100</value>
</property>
</bean>
<bean id="simpleBean3" class="SimpleBeanWithInterface">
<property name="name">
<value>Rob Harrop</value>
</property>
</bean>
</beans>

///////////////////////////////////////////////////////////////////////////////////////
import org.springframework.beans.factory.BeanCreationException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;
public class SimpleBeanWithInterface implements InitializingBean {
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 myInit() {
System.out.println("My Init");
}
public void afterPropertiesSet() throws Exception {
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/initInterface.xml"));
SimpleBeanWithInterface simpleBean1 = getBean("simpleBean1", factory);
SimpleBeanWithInterface simpleBean2 = getBean("simpleBean2", factory);
SimpleBeanWithInterface simpleBean3 = getBean("simpleBean3", factory);
}
private static SimpleBeanWithInterface getBean(String beanName,
BeanFactory factory) {
try {
SimpleBeanWithInterface bean = (SimpleBeanWithInterface) 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;
}
}
}
///////////////////////////////////////////////////////////////////////////////////////
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;
}
}
}

</source>



== Lazy Init Demo ==



<source lang="java">

/*
Pro Spring
By Rob Harrop
Jan Machacek
ISBN: 1-59059-461-4
Publisher: Apress
*/

///////////////////////////////////////////////////////////////////////////////////////
//File: lazy.xml
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="destructiveBean" class="DestructiveBeanWithInterface">
<property name="filePath">
<value>c:/test.txt</value>
</property>
</bean>
<bean id="shutdownHook" class="ShutdownHookBean" lazy-init="false"/>
</beans>

///////////////////////////////////////////////////////////////////////////////////////
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;
public class DestructiveBeanWithInterface implements InitializingBean,
DisposableBean {
private InputStream is = null;
public String filePath = null;
public void afterPropertiesSet() throws Exception {
System.out.println("Initializing Bean");
if (filePath == null) {
throw new IllegalArgumentException(
"You must specify the filePath property of " + DestructiveBean.class);
}
is = new FileInputStream(filePath);
}
public void destroy() {
System.out.println("Destroying Bean");
if (is != null) {
try {
is.close();
is = null;
} catch (IOException ex) {
System.err.println("WARN: An IOException occured"
+ " trying to close the InputStream");
}
}
}
public void setFilePath(String filePath) {
this.filePath = filePath;
}
}

///////////////////////////////////////////////////////////////////////////////////////
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
public class ShutdownHookBean implements BeanFactoryAware,
Runnable {
private ConfigurableListableBeanFactory factory;
public void setBeanFactory(BeanFactory factory) throws BeansException {
if (factory instanceof ConfigurableListableBeanFactory) {
this.factory = (ConfigurableListableBeanFactory) factory;
Runtime.getRuntime().addShutdownHook(new Thread(this));
}
}
public void run() {
if (factory != null) {
System.out.println("Destroying Singletons");
factory.destroySingletons();
System.out.println("Singletons Destroyed");
}
}
}
///////////////////////////////////////////////////////////////////////////////////////
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;
public class DestructiveBean implements InitializingBean {
private InputStream is = null;
public String filePath = null;
public void afterPropertiesSet() throws Exception {
System.out.println("Initializing Bean");
if (filePath == null) {
throw new IllegalArgumentException(
"You must specify the filePath property of " + DestructiveBean.class);
}
is = new FileInputStream(filePath);
}
public void destroy() {
System.out.println("Destroying Bean");
if (is != null) {
try {
is.close();
is = null;
} catch (IOException ex) {
System.err.println("WARN: An IOException occured"
+ " trying to close the InputStream");
}
}
}
public void setFilePath(String filePath) {
this.filePath = filePath;
}
}
///////////////////////////////////////////////////////////////////////////////////////
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
public class LazyInitDemo {
public static void main(String[] args) {
ApplicationContext ctx = new FileSystemXmlApplicationContext(
"build/lazy.xml");
DestructiveBeanWithInterface bean = (DestructiveBeanWithInterface) ctx
.getBean("destructiveBean");
}
}

</source>



== SimpleBean Init Method ==



<source lang="java">

/*
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;
}
}
}

</source>

← Предыдущая	Версия 06:17, 1 июня 2010
(нет различий)

Java/Spring/IoC Init Beans - История изменений

Admin: 1 версия

в 18:01, 31 мая 2010