Spring自动装配模式四：constructor的解析
与byType的方式类似，不同之处在于它应用于构造器参数。如果在容器中没有找到与构造器参数类型一致的bean，那么将会抛出异常
<bean id="homeAddressServiceImpl" class="cn.csdn.service.HomeAddressServiceImpl"
scope="singleton">
<property name="address">
<value>北京海淀上地软件园</value>
</property>
</bean>
<!--
如果在构造器中有一个实例对象,但是在配置文件中并没有与之对应的bean的实例：那么在采用
autowire="constructor"自动装载时会出现：
org.springframework.beans.factory.UnsatisfiedDependencyException: 异常信息
-->
<bean id="empServiceImpl" class="cn.csdn.service.EmpServiceImpl"
scope="singleton" autowire="constructor" />
cn.csdn.service.HomeAddressServiceImpl代码
public class HomeAddressServiceImpl extends AddressServiceImpl {
private String address;
public void setAddress(String address){
this.address=address;
}
public HomeAddressServiceImpl() {
super();
}
public HomeAddressServiceImpl(String address){
this.address=address;
}
}
cn.csdn.service.EmpServiceImpl 代码
package cn.csdn.service;
public class EmpServiceImpl {
/**公司地址*/
private AddressServiceImpl companyAddress;
public EmpServiceImpl(AddressServiceImpl companyAddress) {
super();
this.companyAddress = companyAddress;
}
}
