装配Spring Bean
Posted 来福啊
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了装配Spring Bean相关的知识,希望对你有一定的参考价值。
通过XML配置装配Bean
前面已经用过,使用XML装配Bean需要定义对应的XML,引入对应的XML模式(XSD)文件:
<?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-4.0.xsd"> <!-- Spring Bean配置代码--> </beans>
1.装配简易值
<bean id="source" class="test3.Source"> <property name="fruit" value="橙汁"/> <property name="sugar" value="少糖"/> <property name="size" value="大杯"/> </bean> <bean id="juiceMaker" class="test3.JuiceMaker"> <property name="beverageShop" value="贡茶"/> <property name="source" ref="source"/> </bean>
2.装配集合
<bean id="complexAssembly" class="test.ComplexAssembly">
<property name="id" value="1" />
<property name="list">
<list>
<value>value-list-1</value>
<value>value-list-2</value>
<value>value-list-3</value>
</list>
</property>
<property name="map">
<map>
<entry key="key1" value="value-key-1" />
<entry key="key2" value="value-key-2" />
<entry key="key3" value="value-key-3" />
</map>
</property>
<property name="props">
<props>
<prop key="prop1">value-prop-1</prop>
<prop key="prop2">value-prop-2</prop>
<prop key="prop3">value-prop-3</prop>
</props>
</property>
<property name="set">
<set>
<value>value-set-1</value>
<value>value-set-2</value>
<value>value-set-3</value>
</set>
</property>
<property name="array">
<array>
<value>value-array-1</value>
<value>value-array-2</value>
<value>value-array-3</value>
</array>
</property>
</bean>
有时候可能需要更加复杂的装载,比如一个List可以是一个系列类的对象,又如Map集合类,键可以使一个类对象,而值也可以是一个类对象,上代码:
public class Role { private int id; private String roleName; private String note; //setter getter } public class User { private Long id; private String userName; private String note; //setter getter } public class UserRoleAssembly { private Long id; private List<Role> list; private Map<Role,User> map; private Set<Role> set; //setter getter }
配置用户角色:
<bean id="role1" class="test.Role"> <property name="id" value="1" /> <property name="roleName" value="role_name_1" /> <property name="note" value="role_note_1" /> </bean> <bean id="role2" class="test.Role"> <property name="id" value="2" /> <property name="roleName" value="role_name_2" /> <property name="note" value="role_note_2" /> </bean> <bean id="user1" class="test.User"> <property name="id" value="1" /> <property name="userName" value="user_name_1" /> <property name="note" value="user_note_1" /> </bean> <bean id="user2" class="test.User"> <property name="id" value="2" /> <property name="userName" value="user_name_2" /> <property name="note" value="user_note_2" /> </bean> <bean id="userRoleAssembly" class="test.UserRoleAssembly"> <property name="id" value="1" /> <property name="list"> <list> <ref bean="role1" /> <ref bean="role2" /> </list> </property> <property name="map"> <map> <entry key-ref="role1" value-ref="user1" /> <entry key-ref="role2" value-ref="user2" /> </map> </property> <property name="set"> <set> <ref bean="role1" /> <ref bean="role2" /> </set> </property> </bean>
3.命名空间装配
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:c="http://www.springframework.org/schema/c" xmlns:p="http://www.springframework.org/schema/p" xmlns:util="http://www.springframework.org/schema/util" 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 http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd"> <bean id="role1" class="com.ssm.chapter10.pojo.Role" c:_0="1" c:_1="role_name_1" c:_2="role_note_1" /> <bean id="role2" class="com.ssm.chapter10.pojo.Role" p:id="2" p:roleName="role_name_2" p:note="role_note_2" /> <bean id="user1" class="com.ssm.chapter10.pojo.User" p:id="1" p:userName="role_name_1" p:note="user_note_1" /> <bean id="user2" class="com.ssm.chapter10.pojo.User" p:id="2" p:userName="role_name_2" p:note="user_note_2" /> <util:list id="list"> <ref bean="role1" /> <ref bean="role2" /> </util:list> <util:map id="map"> <entry key-ref="role1" value-ref="user1" /> <entry key-ref="role2" value-ref="user2" /> </util:map> <util:set id="set"> <ref bean="role1" /> <ref bean="role2" /> </util:set> <bean id="userRoleAssembly" class="com.ssm.chapter10.pojo. UserRoleAssembly" p:id="1" p:list-ref="list" p:map-ref="map" p:set-ref="set" /> </beans>
以上是关于装配Spring Bean的主要内容,如果未能解决你的问题,请参考以下文章