springBoot配置分析(属性和结构化)

使用idea自带插件创建项目

一直下一步到完成

application.properties

local.ip.addr = 192.168.2.110
redis.host = 192.168.3.11
redis.auth = redis-01
redis.port = 6380

gerry.datasource.driverClassName = com.mysql.jdbc.Driver
gerry.datasource.url = jdbc:mysql:///db
gerry.datasource.username = root
gerry.datasource.password = 123

application.yml

local:
ip:
test: 192.168.2.220-yml

主方法类

package com.boot.config.bootconfig;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.core.env.Environment;

@SpringBootApplication
/**
* 总结springBoot项目配置：
* 1、通过环境Environment方式读取配置文件中的信息
* 2、通过@Value方式来读取配置信息
* 3、通过@Configuration+@PropertySource("指定配置文件的路径")
* 4、通过@ConfigurationProperties指定配置类
* 注意：配置文件的加载顺序及文件名称
* 1、config/application.properties
*    config/application.yml
*    application.properties
*    application.yml
* 2、指定配置文件（名称，路径）（设置到运行参数中，
*      如设置带vm参数中要加-Dspring.config.name=xxx/axxx/app）
*      设置到program参数中直接--spring.config.name=xxx/axxx/app
*    --spring.config.name=xxx/axxx/app(后缀可以省略)
*    --spring.config.location=classpath:xxx.properties/yml多个配置文件可以使用逗号分隔
*                             file:/D:/tmp/app.properties 指定绝对路径
*
*/
public class BootConfigApplication {
public static void main(String[] args) {
ConfigurableApplicationContext context =
SpringApplication.run(BootConfigApplication.class, args);
// 通过spring容器获取环境对象
Environment env = context.getEnvironment();
String ip = env.getProperty("local.ip.addr");
String testId = env.getProperty("local.ip.test");
String currentDir = env.getProperty("user.dir");//当前目录
String envProperty = env.getProperty("spring.app.name");
String namePro = env.getProperty("gerry.name");
System.out.println(ip+","+currentDir+","+testId+","+envProperty+","+namePro);

// 通过@Value方式读取
RedisConfig redisConfig = context.getBean(RedisConfig.class);
redisConfig.show();

// 通过ConfigurationProperties方式
DatasourceProperties datasourceProperties = context.getBean(DatasourceProperties.class);
System.out.println(datasourceProperties);

context.close();
}
}

RedisConfig

package com.boot.config.bootconfig;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component
public class RedisConfig {

@Autowired
private DatasourceProperties dp;

@Value("${redis.port:6379}")
private int port;

@Value("${redis.host:127.0.0.1}")
private String host;

@Value("${redis.auth:123}")
private String auth;

public void show() {
System.out.println(port+","+host+","+auth+","+dp.getDriverClassName());
}

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;
}
}

DatasourceProperties

package com.boot.config.bootconfig;

/*@Component
@ConfigurationProperties(prefix = "gerry.datasource")*/
public class DatasourceProperties {

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

public String getDriverClassName() {
return driverClassName;
}

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

public String getUrl() {
return url;
}

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

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;
}

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

DataSourceConfig（通过依赖注入获取实例得到DatasourceProperties实例）

package com.boot.config.bootconfig.config;

import com.boot.config.bootconfig.DatasourceProperties;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class DataSourceConfig {
@Bean
@ConfigurationProperties(prefix = "gerry.datasource")
public DatasourceProperties dp() {
return new DatasourceProperties();
}
}

FileConfig (使用此方式可配置运行时参数)

package com.boot.config.bootconfig;

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

@Configuration
@PropertySource("classpath:conf/app.yml") // 不生效
@PropertySource("classpath:conf/app1.properties")
@PropertySource("file:/D:/tmp/app.properties")
public class FileConfig {
}