Spring 入门之 整合第三方 bean 注解开发

1. 创建SpringConfig.class

package com.daidai.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;

@Configuration
@Import({JdbcConfig.class})
public class SpringConfig {
}

2. 创建JdbcConfig.class

package com.daidai.config;

import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

import javax.sql.DataSource;

@Configuration
@PropertySource("classpath:jdbc.properties")
public class JdbcConfig {

    @Value("${name}")
    private String driver;
    @Value("${url}")
    private String url;
    @Value("${user}")
    private String userName;
    @Value("${password}")
    private String password;

    @Bean
    public DataSource dataSource(){
        DruidDataSource druidDataSource = new DruidDataSource();
        druidDataSource.setDriverClassName(driver);
        druidDataSource.setUrl(url);
        druidDataSource.setUsername(userName);
        druidDataSource.setPassword(password);
        return druidDataSource;
    }
}

3. 创建jdbc.properties

user=root
password=000000
url=jdbc:mysql://localhost:3306/test
name=com.mysql.jdbc.Driver

4. 创建测试

package com.daidai.app;

import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

import javax.sql.DataSource;

public class App1 {
    public static void main(String[] args) {

        ApplicationContext context = new AnnotationConfigApplicationContext(com.daidai.config.SpringConfig.class);
        DataSource dataSource = context.getBean(DataSource.class);
        System.out.println(dataSource);
    }
}