Spring注入方式有哪些

<bean id="person" class="com.abc.Person">
 <property name="age" value="30" />
 <property name="son">
  <!-- 使用嵌套Bean定义属性值 -->
  <bean class="com.abc.service.Son">
   <property name="age" value="11" />
  </bean>
 </property>
</bean>

<bean id="son2" class="com.abc.service.Son">
 <!-- age属性不是直接注入，而是将person中的son的age属性赋值给son2的age属性 -->
 <property name="age">
  <!-- 注意这里使用的是PropertyPathFactoryBean -->
  <bean id="person.son.age" 
   class="org.springframework.beans.factory.config.PropertyPathFactoryBean" />
 </property>
</bean>

public class Test {
 public static void main(String args[]) {
  ApplicationContext ac = 
   new ClassPathXmlApplicationContext("applicationContext.xml");
  System.out.println("age=" + ac.getBean("son2", Son.class).getAge());
 }
}

<bean id="son1" 
 class="org.springframework.beans.factory.config.PropertyPathFactoryBean">
 <!-- 确定目标Bean，表明son1来自哪个Bean的组件 -->
 <property name="targetBeanName" value="person" />
 <!-- 确定属性，表明son1来自目标Bean的哪个属性 -->
 <property name="propertyPath" value="son" />
</bean>

<bean id="son" class="com.abc.service.Son">
 <property name="age">
  <bean id="java.sql.connection.TRANSACTION_SERIALIZABLE"
   class="org.springframework.beans.factory.config.FieldRetrievingFactoryBean" />
 </property>
</bean>

<bean id="age" 
 class="org.springframework.beans.factory.config.FieldRetrievingFactoryBean">
 <!-- targetClass指定Field所在的目标类 -->
 <property name="targetClass" value="java.sql.Connection" />
 <!-- targetField指定Field名 -->
 <property name="targetField" value="TRANSACTION_SERIALIZABLE" />
</bean>

<bean id="age" 
 class="org.springframework.beans.factory.config.FieldRetrievingFactoryBean">
 <!-- value指定哪个类的哪个静态域值 -->
 <property name="staticField" value="java.sql.Connection.TRANSACTION_SERIALIZABLE" />
</bean>

<bean id="valueGenerator" class="com.abc.util.ValueGenerator" />
<bean id="son1" class="com.abc.service.Son">
 <property name="age">
  <!-- 获取方法返回值：调用valueGenerator的getValue方法 -->
  <bean 
   class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
   <property name="targetObject" ref="valueGenerator" />
   <property name="targetMethod" value="getValue" />
  </bean>
 </property>
</bean>

public class ValueGenerator {
 public int getValue() { return 2; }
 public static int getStaticValue () { return 3;}
}

<bean id="son1" class="com.abc.service.Son">
 <property name="age">
  <!-- 获取方法返回值：调用valueGenerator的getStaticValue方法 -->
  <bean 
   class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
   <property name="targetClass" value="com.abc.util.ValueGenerator" />
   <property name="targetMethod" value="getStaticValue" />
  </bean>
 </property>
</bean>

<bean id="sysProps" 
 class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
 <property name="targetClass" value="java.lang.System" />
 <property name="targetMethod" value="getProperties" />
<bean>
<bean id="javaVersion" class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
 <!-- 指向上面的sysProps Bean -->
 <property name="targetObject" value="sysProps" />
 <property name="targetMethod" value="getProperty" />
 <!-- 这里配置参数 -->
 <property name="arguments">
  <!-- 使用list元素列出调用方法的多个参数 -->
  <list>
   <value>java.version</value>
  </list>
 </property>
<bean>

<bean id="myBean"
 class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
 <!-- 使用staticMethod属性，直接指定目标类的目标方法 -->
 <property name="staticMethod" value="com.abc.util.ValueGenerator.getStaticValue" />
</bean>