(1)为了不全在applicationContext配置文件写导致说明上的麻烦,在这里还是用局部配置文件进行讲解,不想用局部配置文件,完全可以直接将配置写在applicationContext中。
<?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-2.5.xsd">
<import resource="cn/java/di/jvbu.xml"/>
</beans>
Person类:
package cn.java.di;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
public class Person {
private String name;
private Panda pet;
private List list;//没有给泛型的时候默认的是object
private Map map;
private Set set;
private Properties props;//描述的是.properties配置文件,里面也是key,value键值对,但是里面固定死了只能是String类型
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Panda getPet() {
return pet;
}
public void setPet(Panda pet) {
this.pet = pet;
}
public List getList() {
return list;
}
public void setList(List list) {
this.list = list;
}
public Map getMap() {
return map;
}
public void setMap(Map map) {
this.map = map;
}
public Set getSet() {
return set;
}
public void setSet(Set set) {
this.set = set;
}
public Properties getProps() {
return props;
}
public void setProps(Properties props) {
this.props = props;
}
@Override
public String toString() {
return "Person [name=" + name + ", pet=" + pet + ", list=" + list + ", map=" + map + ", set=" + set + ", props="
+ props + "]";
}
}
Panda类:
package cn.java.di;
public class Panda {
private String name;
private Integer age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
@Override
public String toString() {
return "Panda [name=" + name + ", age=" + age + "]";
}
}
局部的配置文件信息,也可以将applicationContext中的<import>除掉,直接将下列的代码放到里面。
<?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-2.5.xsd">
<bean id="smallPanda" class="cn.java.di1.Panda">
<property name="name" value="功夫熊猫"></property>
<property name="age" value="20"></property>
</bean>
<!-- 注意给自定义的属性赋值时,用ref,而且它的值与自定义的属性的bean的id值一致 -->
<bean id="person" class="cn.java.di1.Person">
<property name="name" value="王二麻子"></property>
<property name="pet" ref="smallPanda"></property>
<!-- list赋值方法,因为在person类中没有给list赋予确定的类型,所以在这里填任何类型都可以 ,以下同理-->
<property name="list">
<list>
<value>list1</value>
<value>中国</value>
<!-- 在这里给list集合赋值了smallPanda中的值 -->
<ref bean="smallPanda"/>
</list>
</property>
<property name="set">
<set>
<value>set1</value>
<value>china</value>
<ref bean="smallPanda"/>
</set>
</property>
<!-- map集合的赋值方法 -->
<property name="map">
<map>
<entry key="name" value="李四"></entry>
<entry key="age" value="10"></entry>
<!-- map的引用方法 -->
<entry key-ref="smallPanda"></entry>
</map>
</property>
<!-- property的赋值方法 -->
<property name="props">
<props>
<!-- com.mysql.jdbc.Driver是值, -->
<prop key="driver">com.mysql.jdbc.Driver</prop>
<prop key="url">jdbc:oracle:@thin:localhost:1521:orcl</prop>
</props>
</property>
</bean>
</beans>
测试的类:
package cn.java.di;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import cn.java.di.Person;
import cn.java.initAndDistroy.Ji;
import cn.java.lazy.Duck;
import cn.java.singleton2.Dog;
public class Window {
public static void main(String[] args) {
//启动框架(context代表spring容器)
ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");//只写这句也可以调用
//Person 类中的无参构造方法
Person p1=(Person)context.getBean("person"); System.out.println(p1);}}一部分的结果: