|
这篇文章来谈谈《Spring Framework 开发参考手册》的3.3.5小节中的“自动装配协作对象”和3.3.6 小节中的“依赖检查”。 仔细看看文档，相关配置见前面文章。 先建立一个包：javamxj.spring.basic.autowiring ，然后把以下4个文件放在这个包下。 · HelloBean，一个简单的Bean，含有一个属性hello。 HelloBean.java | package javamxj.spring.basic.autowiring;
public class HelloBean {
private String hello;
public String getHello() {
return hello;
}
public void setHello(String hello) {
this.hello = hello;
} } |
· HelloDate类先定义了三个构造函数，然后设置了三个属性：hello、date、date2。 HelloDate.java | package javamxj.spring.basic.autowiring;
import java.util.Date;
import java.util.GregorianCalendar;
public class HelloDate { public HelloDate() {
System.out.println("defalt Constructor called");
}
public HelloDate(HelloBean hello) {
System.out.println("HelloDate(HelloBean) called");
}
public HelloDate(HelloBean hello, Date date) {
System.out.println("HelloDate(HelloBean,Date) called");
}
public void setHello(HelloBean hello) {
System.out.println("Property hello set");
}
public void setDate(Date date) {
System.out.println("Property date set");
}
public void setDate2(GregorianCalendar date) {
System.out.println("Property date2 set");
}
} |
· beans.xml中定义了七个bean， xml version="1.0" encoding="GBK"?>
DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="date" name="myDate" class="java.util.Date"/>
<bean id="helloBean" class="javamxj.spring.basic.autowiring.HelloBean"
dependency-check="simple">
<property name="hello" value="javamxj"/>
bean>
<bean id="HelloByName" class="javamxj.spring.basic.autowiring.HelloDate"
autowire="byName"/>
<bean id="HelloByType" class="javamxj.spring.basic.autowiring.HelloDate"
autowire="byType"/>
<bean id="HelloConstructor" class="javamxj.spring.basic.autowiring.HelloDate"
autowire="constructor"/>
<bean id="HelloAutodetect" class="javamxj.spring.basic.autowiring.HelloDate"
autowire="autodetect"/>
<bean id="helloCheck" class="javamxj.spring.basic.autowiring.HelloDate" autowire="byType"
dependency-check="objects">
<property name="date2" >
<bean class="java.util.GregorianCalendar"/>
property>
bean>
beans> |
