package com.h3.common;
public class customer
{
//you want autowired this field.
private person person;
private int type;
private string action;
//getter and setter method
}
<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-2.5.xsd">
<bean id="customerbean" class="com.h3.common.customer">
<property name="action" value="buy" />
<property name="type" value="1" />
</bean>
<bean id="personbean" class="com.h3.common.person">
<property name="name" value="h3" />
<property name="address" value="address 123" />
<property name="age" value="28" />
</bean>
</beans>
<beans //... xmlns:context="http://www.springframework.org/schema/context" //... http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd"> //... <context:annotation-config /> //... </beans>
下面是完整的实例
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xmlns:context="http://www.springframework.org/schema/context" xsi:schemalocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd"> <context:annotation-config /> <bean id="customerbean" class="com.h3.common.customer"> <property name="action" value="buy" /> <property name="type" value="1" /> </bean> <bean id="personbean" class="com.h3.common.person"> <property name="name" value="h3" /> <property name="address" value="address abc" /> <property name="age" value="29" /> </bean> </beans>
<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-2.5.xsd"> <bean class="org.springframework.beans.factory.annotation.autowiredannotationbeanpostprocessor"/> <bean id="customerbean" class="com.h3.common.customer"> <property name="action" value="buy" /> <property name="type" value="1" /> </bean> <bean id="personbean" class="com.h3.common.person"> <property name="name" value="h3" /> <property name="address" value="address abc" /> <property name="age" value="29" /> </bean> </beans>
package com.h3.common;
import org.springframework.beans.factory.annotation.autowired;
public class customer
{
private person person;
private int type;
private string action;
//getter and setter methods
@autowired
public void setperson(person person) {
this.person = person;
}
}
package com.h3.common;
import org.springframework.beans.factory.annotation.autowired;
public class customer
{
private person person;
private int type;
private string action;
//getter and setter methods
@autowired
public customer(person person) {
this.person = person;
}
}
package com.h3.common;
import org.springframework.beans.factory.annotation.autowired;
public class customer
{
@autowired
private person person;
private int type;
private string action;
//getter and setter methods
}
执行它
package com.h3.common;
import org.springframework.context.applicationcontext;
import org.springframework.context.support.classpathxmlapplicationcontext;
public class app
{
public static void main( string[] args )
{
applicationcontext context =
new classpathxmlapplicationcontext(new string[] {"applicationcontext.xml"});
customer cust = (customer)context.getbean("customerbean");
system.out.println(cust);
}
}
输出
customer [person=person [name=h3a], type=1, action=buy]
默认情况下，@autowired将执行相关检查，以确保属性已经装配正常。当spring无法找到匹配的bean装配，它会抛出异常。要解决这个问题，可以通过 @autowired 的“required”属性设置为false来禁用此检查功能。
package com.h3.common;
import org.springframework.beans.factory.annotation.autowired;
public class customer
{
@autowired(required=false)
private person person;
private int type;
private string action;
//getter and setter methods
}
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xmlns:context="http://www.springframework.org/schema/context" xsi:schemalocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd"> <context:annotation-config /> <bean id="customerbean" class="com.h3.common.customer"> <property name="action" value="buy" /> <property name="type" value="1" /> </bean> <bean id="personbean1" class="com.h3.common.person"> <property name="name" value="h3-1" /> <property name="address" value="address-1" /> <property name="age" value="29" /> </bean> <bean id="personbean2" class="com.h3.common.person"> <property name="name" value="h3-2" /> <property name="address" value="address-2" /> <property name="age" value="28" /> </bean> </beans>
package com.h3.common;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.beans.factory.annotation.qualifier;
public class customer
{
@autowired
@qualifier("personbean1")
private person person;
private int type;
private string action;
//getter and setter methods
}
这意味着，“personbean1” bean被自动装配到customer的person属性。阅读下面完整的例子 – spring自动装配@qualifier实例
