مثال على حقن الطريقة المعدة والجمعيات حقن الطريقة المعدة Spring

Setter injection and dependent object example

As with constructor injection, we can use setter injection to inject a dependency of another bean. In this case, we use property elements. In this scenario, our scene is Employee HAS-A AddressAddress class object will be called a dependent object. Let's take a look at the Address class first:

Address.java

هذه الفئة تحتوي على أربع خصائص، وهي setters و getters و metode toString().

مثال

package com.w3codebox;
public class Address {
private String addressLine1,city,state,country;
// getters and setters
public String toString(){
    return addressLine1+" "+city+" "+state+" "+country;
}

Employee.java

انه يحتوي على ثلاثة خصائص id، الاسم والمسكن (الذين هم كائنات معتمدة)، باستخدام setters و getters لمتدخل displayInfo().

مثال

package com.w3codebox;
public class Employee {
private int id;
private String name;
private Address address;
// setters and getters
void displayInfo(){
    System.out.println(id+" "+name);
    System.out.println(address);
}
}

applicationContext.xml

الممتلكاتالخصائص ref خصائص تستخدم لتحديد مرجعbean آخر.

مثال

<?xml version="1.0" encoding="UTF-8"?>
<beans
    xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<bean id="address1" class="com.w3codebox.Address"
<property name="addressLine1" value="51,Lohianagar"></property>
<property name="city" value="Ghaziabad"></property>
<property name="state" value="UP"></property>
<property name="country" value="India"></property>
</bean>
<bean id="obj" class="com.w3codebox.Employee">
<property name="id" value="1"></property>
<property name="name" value="Sachin Yadav"></property>
<property name="address" ref="address1"></property>
</bean>
</beans>

Test.java

هذا الفئة تحصل على Bean من ملف applicationContext.xml وتقوم بتهيئة طريقة displayInfo().

مثال

package com.w3codebox;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
public class Test {
public static void main(String[] args) {
    Resource r=new ClassPathResource("applicationContext.xml");
    BeanFactory factory=new XmlBeanFactory(r);
    Employee e=(Employee)factory.getBean("obj");
    e.displayInfo();
}
}

مثال على حقن الطريقة المعدة والجمعيات حقن الطريقة المعدة Spring

تعليمية Spring

Setter injection and dependent object example