Spring的Bean循环依赖之构造注入-----Spring框架

水深无声 2024-03-23 21:25 71阅读 0赞

>     <?xml version="1.0" encoding="UTF-8"?>
>     <beans xmlns="http://www.springframework.org/schema/beans"
>            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>            xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
>         <bean id="husband" class="com.powernode.spring6.bean2.Husband" scope="singleton">
>             <constructor-arg index="0" value="Jack"></constructor-arg>
>             <constructor-arg index="1" ref="wife"></constructor-arg>
>         </bean>
>     
>         <bean id="wife" class="com.powernode.spring6.bean2.Wife" scope="singleton">
>             <constructor-arg index="0" value="Rose"></constructor-arg>
>             <constructor-arg index="1" value="husband"></constructor-arg>
>         </bean>
>     </beans>
> 
>     <?xml version="1.0" encoding="UTF-8"?>
>     <beans xmlns="http://www.springframework.org/schema/beans"
>            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>            xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
>         <bean id="husband" class="com.powernode.spring6.bean2.Husband" scope="singleton">
>             <constructor-arg index="0" value="Jack"></constructor-arg>
>             <constructor-arg index="1" ref="wife"></constructor-arg>
>         </bean>
>     
>         <bean id="wife" class="com.powernode.spring6.bean2.Wife" scope="singleton">
>             <constructor-arg index="0" value="Rose"></constructor-arg>
>             <constructor-arg index="1" value="husband"></constructor-arg>
>         </bean>
>     </beans>

>     package com.powernode.spring6.test;
>     
>     import com.powernode.spring6.bean.Husband;
>     import com.powernode.spring6.bean.Wife;
>     import org.slf4j.Logger;
>     import org.slf4j.LoggerFactory;
>     import org.springframework.context.ApplicationContext;
>     import org.springframework.context.support.ClassPathXmlApplicationContext;
>     
>     public class Test
>     {
>         private static final Logger logger = LoggerFactory.getLogger(Test.class);
>         @org.junit.Test
>         public void TestDependency()
>         {
>             ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
>             Husband husband = applicationContext.getBean("husband", Husband.class);
>             Wife wife = applicationContext.getBean("wife", Wife.class);
>             System.out.println(wife);
>             System.out.println(husband);
>         }
>         @org.junit.Test
>         public void TestCD()
>         {
>             ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring2.xml");
>             com.powernode.spring6.bean2.Husband husband = applicationContext.getBean("husband", com.powernode.spring6.bean2.Husband.class);
>             com.powernode.spring6.bean2.Wife wife = applicationContext.getBean("wife", com.powernode.spring6.bean2.Wife.class);
>             System.out.println(wife);
>             System.out.println(husband);
>         }
>     }
> 
>     package com.powernode.spring6.test;
>     
>     import com.powernode.spring6.bean.Husband;
>     import com.powernode.spring6.bean.Wife;
>     import org.slf4j.Logger;
>     import org.slf4j.LoggerFactory;
>     import org.springframework.context.ApplicationContext;
>     import org.springframework.context.support.ClassPathXmlApplicationContext;
>     
>     public class Test
>     {
>         private static final Logger logger = LoggerFactory.getLogger(Test.class);
>         @org.junit.Test
>         public void TestDependency()
>         {
>             ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
>             Husband husband = applicationContext.getBean("husband", Husband.class);
>             Wife wife = applicationContext.getBean("wife", Wife.class);
>             System.out.println(wife);
>             System.out.println(husband);
>         }
>         @org.junit.Test
>         public void TestCD()
>         {
>             ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring2.xml");
>             com.powernode.spring6.bean2.Husband husband = applicationContext.getBean("husband", com.powernode.spring6.bean2.Husband.class);
>             com.powernode.spring6.bean2.Wife wife = applicationContext.getBean("wife", com.powernode.spring6.bean2.Wife.class);
>             System.out.println(wife);
>             System.out.println(husband);
>         }
>     }

>     package com.powernode.spring6.bean2;
>     
>     public class Husband
>     {
>         private String name;
>         private Wife wife;
>     
>         public String getName() {
>             return name;
>         }
>     
>         @Override
>         public String toString() {
>             return "Husband{" +
>                     "name='" + name + '\'' +
>                     ", wife=" + wife.getName() +
>                     '}';
>         }
>     
>         public Husband(String name, Wife wife) {
>             this.name = name;
>             this.wife = wife;
>         }
>     }
> 
>     package com.powernode.spring6.bean2;
>     
>     public class Husband
>     {
>         private String name;
>         private Wife wife;
>     
>         public String getName() {
>             return name;
>         }
>     
>         @Override
>         public String toString() {
>             return "Husband{" +
>                     "name='" + name + '\'' +
>                     ", wife=" + wife.getName() +
>                     '}';
>         }
>     
>         public Husband(String name, Wife wife) {
>             this.name = name;
>             this.wife = wife;
>         }
>     }

>     package com.powernode.spring6.bean2;
>     
>     public class Wife
>     {
>         private String name;
>         private Husband husband;
>     
>         public Wife(String name, Husband husband) {
>             this.name = name;
>             this.husband = husband;
>         }
>     
>         public String getName() {
>             return name;
>         }
>     
>         @Override
>         public String toString() {
>             return "Wife{" +
>                     "name='" + name + '\'' +
>                     ", husband=" + husband.getName() +
>                     '}';
>         }
>     }
> 
>     package com.powernode.spring6.bean2;
>     
>     public class Wife
>     {
>         private String name;
>         private Husband husband;
>     
>         public Wife(String name, Husband husband) {
>             this.name = name;
>             this.husband = husband;
>         }
>     
>         public String getName() {
>             return name;
>         }
>     
>         @Override
>         public String toString() {
>             return "Wife{" +
>                     "name='" + name + '\'' +
>                     ", husband=" + husband.getName() +
>                     '}';
>         }
>     }