标签：存在 instance ica out etag als div lock ns-3
1.自动装配
1.1 byType
1.1.1根据类型自动匹配,若当前没有类型可以注入或者存在多个类型可以注入，则失败。必须要有对于的setter方法
public class Person{ public String name; public int age; public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String toString(){ return this.name+" "+this.age; } } public class Group { public Person pafter; public Person getPafter() { return pafter; } public void setPafte(Person pafter) { this.pafter = pafter; } } public class Main { static ApplicationContext context = new ClassPathXmlApplicationContext("a.xml"); public static void main(String[] args){ Group g = context.getBean("g1",Group.class); System.out.println(g.getPafter().toString()); } } <?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-3.0.xsd"> <bean id="pafter" class="com.Person"> <property name="name" value="liaohang"/> <property name="age" value="26"/> </bean> <bean id="p2" class="com.Person" autowire-candidate="false"> <property name="name" value="ZhangSan"/> <property name="age" value="26"/> </bean> <bean id="g1" class="com.Group" autowire="byType"> </bean> </beans>
这个xml存在两个person bean，为了避免歧义，将p2设置autowire-candidate="false"，则容器会自动过滤p2，最终p1被注入到group中。
1.1.2 根据名称自动注入，是指 bean名称与setter方法后缀名称 匹配
<bean id="p1234" class="com.Person"> <property name="name" value="liaohang"/> <property name="age" value="26"/> </bean> <bean id="g1" class="com.Group" autowire="byName"/> public class Group { public Person pafter; public Person getPafter() { return pafter; } public void setP1234(Person pafter) { this.pafter = pafter; } }
上面的xml配置和 bean则可以自动注入。
1.13 根据构造函数注入，是按构造函数参数中的类型进行自动注入，与构造函数参数名称无关。
<bean id="p2" class="com.Person" autowire-candidate="false"> <property name="name" value="liaohang"/> <property name="age" value="26"/> </bean> <bean id="g1" class="com.Group" autowire="constructor"/> public class Group { public Person pafter; public Person getPafter() { return pafter; } public Group(Person p1){ this.pafter =p1; } } public class Main { static ApplicationContext context = new ClassPathXmlApplicationContext("a.xml"); public static void main(String[] args){ Group g = context.getBean("g1",Group.class); System.out.println(g.getPafter().toString()); } }
标签：存在 instance ica out etag als div lock ns-3
原文地址：http://www.cnblogs.com/lh218/p/6550440.html
