在 ApplicationContext.xml 中使用 <context:annotation-config /> 时自动装配注释不起作用

Question

  <context:annotation-config />

当在 ApplicationContext.xml 文件中添加以上行时，Test.java 不是运行但是当我添加它时它有效但是在 tutorial 中我正在经历它说这两种方法都有效有人可以帮助解决问题吗以上代码行。

    <bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/>

Employee.java

    package com.stp.beans;

    import org.springframework.beans.factory.annotation.Autowired;

    public class Employee {
        private Address empaddress;

        public Address getEmpaddress() {
            return empaddress;
        }
        @Autowired
        public void setEmpaddress(Address empaddress) {
            this.empaddress = empaddress;
        }
    }

Address.java

    package com.stp.beans;

    public class Address {
        private String address;

        public String getAddress() {
            return address;
        }

        public void setAddress(String address) {
            this.address = address;
        }
    }

ApplicationContext.xml

    <?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-4.3.xsd">
    <bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/>
    <bean id ="empbean" class="com.stp.beans.Employee"></bean>
    <bean id ="adrbean" class="com.stp.beans.Address"></bean>
    </beans>

Test.java

    package com.stp.test;

    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;

    import com.stp.beans.Employee;

    public class Test {
        public static void main(String[] args) {
            ApplicationContext context = new ClassPathXmlApplicationContext("/com/stp/cfgs/ApplicationContext.xml");
            Employee emp = (Employee) context.getBean("empbean");
            System.out.println(emp.getEmpaddress());
        }
    }

Answer 1

当您使用 <context:annotation-config /> 时，您的 ApplicationContext.xml 应该如下所示。

<?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:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-4.3.xsd 
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-4.3.xsd">
<context:annotation-config />
<bean id ="empbean" class="com.stp.beans.Employee"></bean>
<bean id ="adrbean" class="com.stp.beans.Address"></bean>
</beans>

您刚刚错过了 context 相关定义。

在 ApplicationContext.xml 中使用 <context:annotation-config /> 时自动装配注释不起作用

Autowired Annotation not working when uisng <context:annotation-config /> in ApplicationContext.xml

java

spring

spring-mvc

spring-boot

spring-config