24、自动装配[email protected]环境搭建

24、自动装配[email protected]环境搭建

• Spring为我们提供的可以根据当前环境，动态的激活和切换一系列组件的功能。
• 开发环境、测试环境、正式环境 数据源切换

24.1 添加 数据源和jdbc驱动 pom 依赖

<!-- https://mvnrepository.com/artifact/com.mchange/c3p0 -->
<dependency>
    <groupId>com.mchange</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.5.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.13</version>
</dependency>

24.2 添加MainConfigOfProfile

package com.hw.springannotation.config;

import com.mchange.v2.c3p0.ComboPooledDataSource;
import org.springframework.aop.target.CommonsPool2TargetSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.EmbeddedValueResolverAware;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;
import org.springframework.util.StringValueResolver;

import javax.annotation.Resource;
import javax.sql.DataSource;
import java.beans.PropertyVetoException;

/**
 * @Description Profile
 * @Author hw
 * @Date 2018/11/29 19:25
 * @Version 1.0
 */
@Component
@PropertySource(value = {"classpath:/datasource.properties"})
public class MainConfigOfProfile implements EmbeddedValueResolverAware {

    @Value("${db.username}")
    private String username;

    private String driveClassName;

    private StringValueResolver resolver;

    public void setEmbeddedValueResolver(StringValueResolver resolver) {
        this.resolver = resolver;
        this.driveClassName = this.resolver.resolveStringValue("${db.driveClassName}");
    }

    @Bean
    public DataSource dataSourceTest(@Value("${db.password}") String password) throws PropertyVetoException {
        ComboPooledDataSource dataSource = new ComboPooledDataSource();
        dataSource.setUser(username);
        dataSource.setPassword(password);
        dataSource.setJdbcUrl("jdbc:mysql://localhost:3306/test");
        dataSource.setDriverClass(driveClassName);
        return dataSource;
    }

    @Bean
    public DataSource dataSourceDev(@Value("${db.password}") String password) throws PropertyVetoException {
        ComboPooledDataSource dataSource = new ComboPooledDataSource();
        dataSource.setUser(username);
        dataSource.setPassword(password);
        dataSource.setJdbcUrl("jdbc:mysql://localhost:3306/mysql");
        dataSource.setDriverClass(driveClassName);
        return dataSource;
    }

    @Bean
    public DataSource dataSourceProd(@Value("${db.password}") String password) throws PropertyVetoException {
        ComboPooledDataSource dataSource = new ComboPooledDataSource();
        dataSource.setUser(username);
        dataSource.setPassword(password);
        dataSource.setJdbcUrl("jdbc:mysql://localhost:3306/qm_dmp");
        dataSource.setDriverClass(driveClassName);
        return dataSource;
    }
}

24.3 添加配置文件datasource.properties

db.username=root
db.password=root
db.driveClassName=com.mysql.jdbc.Driver

24.4 测试用例Test_ofProfile

package com.hw.springannotation.test;

import com.hw.springannotation.config.MainConfigOfProfile;
import org.junit.jupiter.api.Test;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;

/**
 * @Description TODO
 * @Author hw
 * @Date 2018/11/29 20:14
 * @Version 1.0
 */
public class Test_ofProfile {

    @Test
    public void test() {
        AnnotationConfigApplicationContext applicationContext = new AnnotationConfigApplicationContext(MainConfigOfProfile.class);
        String[] definitionNames = applicationContext.getBeanDefinitionNames();
        for (String name : definitionNames) {
            System.out.println(name);
        }

    }
}

原文地址：https://www.cnblogs.com/Grand-Jon/p/10041688.html