Spring导入jar包和xml配置IoC环境

导入jar包和xml配置IoC环境

通过导入jar包和xml文件配置Spring-IoC环境

下载jar包

Spring下载地址-https://repo.spring.io/ui/packages

可以右键点击Show In Tree

找到要下载的版本

展开要下载的版本，找到dist.zip文件右键下载

下载后解压

所需要的四个jar包在libs文件夹里

idea配置

创建一个新的的工程

导入jar包

1、

2、

3、

4、

配置xml文件

在src下创建

导入四个jar包后没有Spring Config：安装一个Spring插件。

测试

dao包

package dao;

// 接口
public interface IUserDao {
    
    
    void getUser();
    void addUser();
}

dao包下的
impl包

package dao.impl;

import dao.IUserDao;

// IUserDao的实现类1
public class UserDaoOracleImpl implements IUserDao {
    
    
    @Override
    public void getUser() {
    
    
        System.out.println("查询Oracle数据库");
    }

    @Override
    public void addUser() {
    
    
        System.out.println("往Oracle数据库中添加数据");
    }
}

package dao.impl;

import dao.IUserDao;

// IUserDao的实现类2
public class UserDaoImpl implements IUserDao {
    
    
    @Override
    public void getUser() {
    
    
        // 查询数据
        System.out.println("查询MySQL数据库");
    }

    @Override
    public void addUser() {
    
    
        System.out.println("往MySQL数据库中添加数据");
    }
    // 以下还有方法
}

entity包

package entity;

public class User {
    
    
    private Integer id;
    private String userName;

    public Integer getId() {
    
    
        return id;
    }

    public void setId(Integer id) {
    
    
        this.id = id;
    }

    public String getUserName() {
    
    
        return userName;
    }

    public void setUserName(String userName) {
    
    
        this.userName = userName;
    }

    @Override
    public String toString() {
    
    
        return "User{" +
                "id=" + id +
                ", userName='" + userName + '\'' +
                '}';
    }
}

service包

package service;

// 抽象类
public interface IUserService {
    
    
    void getUser();
}

service包下的
impl包

package service.impl;

import dao.IUserDao;
import service.IUserService;

// IUserService实现类
public class UserServiceImpl implements IUserService {
    
    
    IUserDao dao;

    public IUserDao getDao() {
    
    
        return dao;
    }

    public void setDao(IUserDao dao) {
    
    
        this.dao = dao;
    }

    @Override
    public void getUser() {
    
    
        dao.getUser();
    }
}

test包

package test;

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

// 测试类
public class Mytest {
    
    
    public static void main(String[] args) {
    
    
        ApplicationContext ioc = new ClassPathXmlApplicationContext("spring.xml");

        IUserService service = ioc.getBean(IUserService.class);

        service.getUser();
    }
}

xml文件

<?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 class="dao.impl.UserDaoOracleImpl" id="userDaoOracle"/>
    <bean class="service.impl.UserServiceImpl" id="userService">
        <property name="dao" ref="userDaoOracle"/>
    </bean>
</beans>

运行