Spring解决Bean的循环依赖的本质和多例setter方法-----Spring框架

痛定思痛。 2024-03-23 21:24 32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.bean.Husband" scope="singleton">
>             <property name="wife" ref="wife"></property>
>             <property name="name" value="Jack"></property>
>         </bean>
>     
>     
>     
>     
>         <bean id="wife" class="com.powernode.spring6.bean.Wife" scope="prototype">
>             <property name="husband" ref="husband"></property>
>             <property name="name" value="Rose"></property>
>         </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.bean.Husband" scope="singleton">
>             <property name="wife" ref="wife"></property>
>             <property name="name" value="Jack"></property>
>         </bean>
>     
>     
>     
>     
>         <bean id="wife" class="com.powernode.spring6.bean.Wife" scope="prototype">
>             <property name="husband" ref="husband"></property>
>             <property name="name" value="Rose"></property>
>         </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);
>         }
>     }
> 
>     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);
>         }
>     }

>     package com.powernode.spring6.bean;
>     
>     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 void setName(String name) {
>             this.name = name;
>         }
>     
>         public void setWife(Wife wife) {
>             this.wife = wife;
>         }
>     }
> 
>     package com.powernode.spring6.bean;
>     
>     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 void setName(String name) {
>             this.name = name;
>         }
>     
>         public void setWife(Wife wife) {
>             this.wife = wife;
>         }
>     }

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