IDEA中Spring的配置使用

IDEA中Spring的配置使用

• 1.首先创建JavaEE Web Application项目，勾选Spring，Libraries选择Set up library later。（有spring jar包的前提下，没有jar包选择Download）

• 2.项目目录结构

• 3.把lib包中struts2的所有jar包选中，右键，选择Add as Library

• 4.Ctrl+Alt+Shift+s打开项目结构，进行配置

• 5.一个简单的spring example 
• 5.1编写一个UserDao接口

package pers.wpc.dao;

public interface UserDAO {
    public void save();
}

• 5.2编写实现类UserDao

UserDao.java

package pers.wpc.dao.impl;

import pers.wpc.dao.UserDAO;

public class UserDao implements UserDAO {

    @Override
    public void save() {
        System.out.println("save user");
    }
}

• 5.3编写测试类

UserService.java

package pers.wpc.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import pers.wpc.dao.UserDAO;

public class UserService {
    private UserDAO userDAO;
    public void setUserDAO(UserDAO userDAO){
        this.userDAO = userDAO;
    }
    public void addUser(){
        userDAO.save();
    }

    public static void main(String[] args) {
        ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContent.xml");
        UserService us =(UserService)ac.getBean("UserService");
        us.addUser();
    }
}

• 5.4在src下编写一个applicationContext.xml配置文件并进行依赖注入配置，xml需导入Model-->Spring中

applicationContext.xml

<?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.xsd">
    <bean id="UserDAO" class="pers.wpc.dao.impl.UserDao"/>
    <bean id="UserService" class="pers.wpc.test.UserService">
    <property name="userDAO">
        <ref bean="UserDAO"/>
    </property>
    </bean>
</beans>

• 5.5测试