Spring通過XML文件，完成bean配置和bean間依賴關(guān)系的注入。
1.需要用到的包：
spring-core.jar
spring-beans.jar
spring-context.jar
commons-logging.jar
2.Bean文件
HelloBean.java
package cn.blogjava.hello;
import java.util.Date;
public class HelloBean {
private String helloWord;
private String name;
private Date date;
public HelloBean() {
}
public HelloBean(String helloWord, String name) {
this.helloWord = helloWord;
this.name = name;
}
public String getHelloWord() {
return helloWord;
}
public void setHelloWord(String helloword) {
this.helloWord = helloword;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
}
配置文件
beans-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING/DTD BEAN/EN"
"http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
<bean id="dateBean" class="java.util.Date"/>
<bean id="helloBean" class="cn.blogjava.hello.HelloBean" >
<property name="helloWord">
<value>Hello!</value>
</property>
<property name="name">
<value>YYY!</value>
</property>
<property name="date">
<ref bean="dateBean" />
</property>
</bean>
</beans>
3.測試程序
SpringDemo.java
package cn.blogjava.hello;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
public class SpringDemo {
public static void main(String[] args) {
ApplicationContext context =
new FileSystemXmlApplicationContext("beans-config.xml");
HelloBean helloBean = (HelloBean)context.getBean("helloBean");
System.out.print("Name: ");
System.out.println(helloBean.getName());
System.out.print("Word: ");
System.out.println(helloBean.getHelloWord());
System.out.println(helloBean.getDate());
}
}