java Spring 基于注解的配置（一）

注解引用：1.service.xml 配置注解模式

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

       xmlns:context="http://www.springframework.org/schema/context"

       xmlns:aop="http://www.springframework.org/schema/aop"

       xsi:schemaLocation="

http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spring-context-2.5.xsd

http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd">

<!--将针对注解的处理器配置好  -->

<context:annotation-config />

<context:component-scan base-package="*.*"/>

</beans>

2.UserService.java

使用@Service 命名该类的name

使用@Controller("userService") 效果也是一样

如果单使用@Controller 那么命名就只能用userService 这样的驼峰

package com.sun.service;

import java.util.ArrayList;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

@Service("userservice")

public class UserService {

    private String name;

    private ArrayList arr;

        public ArrayList getArr() {

        return arr;

    }

    public void setArr(ArrayList arr) {

        this.arr = arr;

    }

    public UserService(){

        System.out.println("this is chushihua");

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public void init(){

        System.out.println("init------------");

    }

    public void cleanup(){

            System.out.println("cleanup------------");

    }

}
    

3.HelloWorld.java

package com.sun.service;

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.AbstractApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class HelloWorld {

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        AbstractApplicationContext app = new ClassPathXmlApplicationContext("service.xml");

        UserService us  = (UserService) app.getBean("userservice");

        us.setName("Hello World");

        System.out.println(us.getName());

        //us.setName("sunzhiyan");

        /*System.out.println(us.getName());

        for(int i = 0;i < us.getArr().size();i++){

            System.out.println(us.getArr().get(i));

        }

        app.registerShutdownHook();*/

    }

}

这样能够进行输出。