集合类型
下面示例用到的Java类
java
public class Student {
private String name;
private int age;
private String sex;
private double height;
private String address;
private String phone;
private Date birthday;
private List<String> hobbies ;
private List<Teacher> teachers;
private Map<String, String> maps;
}
public class Teacher {
private String name;
private String subject;
}
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List
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List<String>
List中的元素是简单类型或简单类型的封装类(推荐第一种写法)xml<property name="hobbies"> <list> <value>football</value> <value>basketball</value> </list> </property>
xml<property name="hobbies" value="football,basketball" />
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List<Teacher>
List中的元素是对象类型(推荐第一种)xml<!-- 定义具体的Teacher bean --> <bean id="teacher1" class="com.hxj.ioc.bean.Teacher"> <property name="name" value="张老师"/> <property name="subject" value="数学"/> </bean> <bean id="teacher2" class="com.hxj.ioc.bean.Teacher"> <property name="name" value="李老师"/> <property name="subject" value="英语"/> </bean> <!-- 学生中调用 --> <property name="teachers"> <list> <ref bean="teacher1"/> <ref bean="teacher2"/> </list> </property>
xml<property name="teachers"> <list> <bean class="com.hxj.ioc.bean.Teacher"> <property name="name" value="张老师"/> <property name="subject" value="数学"/> </bean> <bean class="com.hxj.ioc.bean.Teacher"> <property name="name" value="李老师"/> <property name="subject" value="英语"/> </bean> </list> </property>
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Set
如果是Set和上面的List注入方式一样,只是标签改用setxml<property name="teachers"> <set> <ref bean="teacher1"/> <ref bean="teacher2"/> </set> </property>
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Map
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基本的 Map 赋值方式
xml<property name="maps"> <map> <entry key="key1" value="value1"/> <entry key="key2" value="value2"/> </map> </property>
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使用 key-ref 和 value-ref(适用于引用其他 Bean 作为键或值)
xml<property name="maps"> <map> <entry key-ref="someBeanAsKey" value-ref="someBeanAsValue"/> </map> </property>
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使用 properties 标签(适用于简单的键值对),注意:使用 方式时,键和值都必须是 String 类型。
xml<property name="maps"> <props> <prop key="key1">value1</prop> <prop key="key2">value2</prop> </props> </property>
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