<?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="userDao" class="dao.impl.UserDaoImpl"></bean>
    <bean id="userService" class="service.impl.UserServiceImpl">
        <!--通过constructor-arg元素为构造方法里的参数赋值-->
        <constructor-arg>
            <ref bean="userDao"/>
        </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"
       xmlns:p="http://www.springframework.org/schema/p"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans-3.2.xsd">
<!-- 使用p命名空间注入属性值 -->
<bean id="user" class="entity.User" p:username="张三" p:age="23"
      p:email="[email protected]" />
<bean id="userDao" class="dao.impl.UserDaoImpl" />
<bean id="userService" class="service.impl.UserServiceImpl" p:dao-ref="userDao" />
</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-3.2.xsd">

<bean id="entity" class="entity.TestEntity">
    <!-- 使用<![CDATA[]]>标记处理XML特殊字符 -->
    <property name="specialCharacter1">
        <value><![CDATA[P&G]]></value>
    </property>
    <!-- 把XML特殊字符替换为实体引用 -->
    <property name="specialCharacter2">
        <value>P&amp;G</value>
    </property>
    <!-- 定义内部Bean -->
    <property name="innerBean">
        <bean class="entity.User">
            <property name="username">
                <value>Mr. Inner</value>
            </property>
        </bean>
    </property>
    <!-- 注入List类型 -->
    <property name="list">
        <list>
            <!-- 定义List中的元素 -->
            <value>足球</value>
            <value>篮球</value>
        </list>
    </property>
    <!-- 注入数组类型 -->
    <property name="array">
        <list>
            <!-- 定义数组中的元素 -->
            <value>足球</value>
            <value>篮球</value>
        </list>
    </property>
    <!-- 注入Set类型 -->
    <property name="set">
        <set>
            <!-- 定义Set或数组中的元素 -->
            <value>足球</value>
            <value>篮球</value>
        </set>
    </property>
    <!-- 注入Map类型 -->
    <property name="map">
        <map>
            <!-- 定义Map中的键值对 -->
            <entry>
                <key>
                    <value>football</value>
                </key>
                <value>足球</value>
            </entry>
            <entry>
                <key>
                    <value>basketball</value>
                </key>
                <value>篮球</value>
            </entry>
        </map>
    </property>
    <!-- 注入Properties类型 -->
    <property name="props">
        <props>
            <!-- 定义Properties中的键值对 -->
            <prop key="football">足球</prop>
            <prop key="basketball">篮球</prop>
        </props>
    </property>
    <!-- 注入空字符串值 -->
    <property name="emptyValue">
        <value></value>
    </property>
    <!-- 注入null值 -->
    <property name="nullValue">
        <null/>
    </property>
</bean>
</beans>