我的第一个Spring程序

1、程序结构

2、各个文件

ByeService.java

package com.service;

public class ByeService {
    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void sayBye() {
        System.out.println("Bye " + name);
    }
}

UserService.java

package com.service;

public class UserService {

    private String name;
    private ByeService byeService;

    public ByeService getbyeService() {
        return byeService;
    }

    public void setbyeService(ByeService byeService) {
        this.byeService = byeService;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void sayHello() {
        System.out.println("hello " + name);
        byeService.sayBye();
    }

}

Test.java

package com.test;

import com.service.UserService;
import com.util.ApplicationContextUtil;

public class Test {

    public static void main(String[] args) {
        ((UserService) ApplicationContextUtil.getApplicationContext().getBean(
                "userService")).sayHello();
    }
}

ApplicationContextUtil.java

package com.util;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

final public class ApplicationContextUtil {
    private static ApplicationContext ac = null;

    private ApplicationContextUtil() {

    }

    static {
        ac = new ClassPathXmlApplicationContext("applicationContext.xml");
    }

    public static ApplicationContext getApplicationContext() {
        return ac;
    }
}

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
    <!-- 在容器文件中配置bean(service/dao/domain/action/数据源 -->
    <!-- 配置bean和注入属性 -->
    <!-- 相当于新建了一个userService对象，名称可随意，但是必须跟下面的<ref local="name">中的name相同 -->
    <bean id="byeService3" class="com.service.ByeService">
        <property name="name" value="涂富杰" />
    </bean>
    <bean id="userService" class="com.service.UserService">
        <!-- 相当于调用了name的setName()方法 -->
        <property name="name">
            <value>tufujie</value>
        </property>
        <property name="byeService">
            <ref local="byeService3" />
        </property>
    </bean>
</beans>

开发中出现错误：Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory

解决方案：加入commons-logging.jar这个架包即可。