嘿嘿，今天偷懒，就记一点点内容，然后去看PPLIVE去！
    注入field值
        FieldRetrievingFactoryBean用来获得目标bean的field值。获得的值可注入给其他bean，也可直接定义成新的bean.
           for example:
--------------------------------------------------------------------------------------------

package org.viking.spring.imp;

public class Son
{
 private int age;

 public int getAge() {
  return age;
 }

 public void setAge(int age) {
  this.age = age;
 }
}
--------------------------------------------------------------------------------------------
<?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-2.0.xsd">
 
 <bean id="son" class="org.viking.spring.imp.Son">
  <property name="age">
  <!-- FiledRetrievingFactoryBean用来获取目标类的field值。id属性确定获取哪个类哪个field值。 -->
   <bean id="java.sql.Connection.TRANSACTION_SERIALIZABLE" class="org.springframework.beans.factory.config.FieldRetrievingFactoryBean"/>
  </property>
 </bean>
</beans>
--------------------------------------------------------------------------------------------

package org.viking.spring.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.viking.spring.imp.Son;

import junit.framework.TestCase;

public class TestInjectField extends TestCase
{
 public void testInjectField()
 {
  ApplicationContext app = new ClassPathXmlApplicationContext("applicationContext.xml");
  Son son = (Son)app.getBean("son");
  System.out.println("系统获取son的age属性： " + son.getAge());

}
}
--------------------------------------------------------------------------------------------
    下面这个是field值定义成bean实例。只需修改applicationContext.xml和测试类。
--------------------------------------------------------------------------------------------

<?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-2.0.xsd">
 
 <bean id="son" class="org.viking.spring.imp.Son">
  <property name="age">
  <!-- FiledRetrievingFactoryBean用来获取目标类的field值。id属性确定获取哪个类哪个field值。 -->
   <bean id="java.sql.Connection.TRANSACTION_SERIALIZABLE" class="org.springframework.beans.factory.config.FieldRetrievingFactoryBean"/>
  </property>
 </bean>
 
 <bean id="theAge" class="org.springframework.beans.factory.config.FieldRetrievingFactoryBean">
  <property name="staticField">
   <value>java.sql.Connection.TRANSACTION_SERIALIZABLE</value>
  </property>
 </bean>
 
</beans>

--------------------------------------------------------------------------------------------

package org.viking.spring.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.viking.spring.imp.Son;

import junit.framework.TestCase;

public class TestInjectField extends TestCase
{
 public void testInjectField()
 {
  ApplicationContext app = new ClassPathXmlApplicationContext("applicationContext.xml");
  Son son = (Son)app.getBean("son");
  System.out.println("系统获取son的age属性： " + son.getAge());
  System.out.println("系统获取theAge的值: " +app.getBean("theAge"));
 }
 
}
--------------------------------------------------------------------------------------------


-------以上的文字以及代码摘录于李刚写的《轻量级J2EE开发企业应用实战》，代码有少许变动！

Identify the aspects of your application that vary and separate them from what stays the same.