springboot 几种属性配置获取

整个项目结构：

1.通过 Environment 去获取属性配置值

2.通过类注解@Component 获取类对象，再通过对象获取属性值，通过 @Value("${redis.port:6380}") 给对应属性赋值或者添加默认值

3.通过注解//@Component @ConfigurationProperties(prefix = "gerry.properties") 类来给对应属性赋值

4.通过@Configuration 创建注解，再方法中创建对应的对象方法

同级目录properties文件优先于yaml文件属性，-D设置优先 properties文件

以下为源码：

@SpringBootApplication
public class BootstartApplication {

	public static void main(String[] args) {
		ConfigurableApplicationContext context = SpringApplication.run(BootstartApplication.class, args);
		User user = context.getBean("user", User.class);

//		User user01 = context.getBean("createUser", User.class);
		User user01 = context.getBean("user01", User.class);
		System.out.println(user + "||" + user01);

		/*
		* 1.通过 Environment 去获取属性配置值
		* */
		ConfigurableEnvironment environment = context.getEnvironment();
		String property = environment.getProperty("local.ip.addr");
		System.out.println("local.id.addr::"+property);

		/*
		* 2.通过类注解@Component 获取类对象，再通过对象获取属性值，通过 @Value("${redis.port:6380}") 给对应属性赋值或者添加默认值
		* */
		RedisConfig redisConfig = context.getBean("redisConfig", RedisConfig.class);
		System.out.println("redis:"+redisConfig.getPort()+" || "+redisConfig.getHost()+" || "+redisConfig.getAuth());

		/*
		* 3.通过注解//@Component @ConfigurationProperties(prefix = "gerry.properties") 类来给对应属性赋值
		*
		* */
		DataSources dataSources = context.getBean(DataSources.class);
		String s = dataSources.toString();
		System.out.println("datasout:"+s);
		/*
		* 4.通过@Configuration 创建注解，再方法中创建对应的对象方法
		* */
		DataSourceConfig bean = context.getBean(DataSourceConfig.class);
		DataSources dataSources1 = bean.getDataSources();
		System.out.println("username::"+dataSources1.getUsername());
	}
}

@Component
public class User {

    private Integer id;
    private String name;
    private Integer age;

    public User() {
        System.out.println("===========user===========");
    }

    public Integer getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }
}


@Component
public class RedisConfig {

    @Value("${redis.port:6380}")
    private int port;

    @Value("${redis.host:192.168.1.222}")
    private String host;

    @Value("${redis.auth:123456}")
    private String auth;

    public int getPort() {
        return port;
    }

    public void setPort(int port) {
        this.port = port;
    }

    public String getHost() {
        return host;
    }

    public void setHost(String host) {
        this.host = host;
    }

    public String getAuth() {
        return auth;
    }

    public void setAuth(String auth) {
        this.auth = auth;
    }
}


//@Component
//@ConfigurationProperties(prefix = "gerry.properties")
public class DataSources {

    private String driverClassName;
    private String username;
    private String password;
    private String url;

    public String getDriverClassName() {
        return driverClassName;
    }

    public void setDriverClassName(String driverClassName) {
        this.driverClassName = driverClassName;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    @Override
    public String toString() {
        return "DataSources{" +
                "driverClassName='" + driverClassName + '\'' +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                ", url='" + url + '\'' +
                '}';
    }
}


@Configuration
public class DataSourceConfig {

    @Bean
    @ConfigurationProperties(prefix = "gerry.properties")
    public DataSources getDataSources(){
        return new DataSources();
    }


}

application.properties 

local.ip.addr=192.168.1.110

redis.port = 6379
redis.host = 192.168.3.11
redis.auth = redis-01


gerry.properties.driverClassName = com.mysql.jdbc.Driver
gerry.properties.username = wl
gerry.properties.password = 123456
gerry.properties.url = jdbc:mysql:///db