<?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="English_level" class="com.myspring.second.EnglishLevel">
<!-- set方法注入 -->
<property name="course">
<value>4级</value>
</property>
</bean>
<bean id="Math_level" class="com.myspring.second.MathCourse">
<!-- 构造函数注入 -->
<constructor-arg><value>1001</value></constructor-arg>
<constructor-arg><value>离散数学</value></constructor-arg>
</bean>
<bean id="student" class="com.myspring.second.Student">
<property name="eng">
<ref bean="English_level"/>
</property>
<property name="mat">
<ref bean="Math_level"/>
</property>
</bean>
</beans>
例如上面这个文件:
- 配置了3个bean
- property 的 name 属性值,在实体 bean 中必须有对应的 set 方法,否则报错 ,报错如下:
Bean property ‘某某属性‘ is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
例如:
<bean id="student" class="com.myspring.second.Student">
<property name="eng">
<ref bean="English_level"/>
</property>
<property name="mat">
<ref bean="Math_level"/>
</property>
</bean>
对于这个bean,在 Student 类中必须存在:
setEng(String string){}
setMat(String string){}
这两个方法;
set 方法写法就不详解了,略~
渣渣就得在 bug中挣扎
>property>>name属性,mamicode.com" style="color:#ffffff" target="_blank">spring 的配置 bean>>property>>name属性