Spring中@ConfigurationProperties的用法解析

spring.datasource.druid.write.url=jdbc:mysql://localhost:3306/jpa
spring.datasource.druid.write.username=root
spring.datasource.druid.write.password=1
spring.datasource.druid.write.driver-class-name=com.mysql.jdbc.Driver

spring.datasource.druid.read.url=jdbc:mysql://localhost:3306/jpa
spring.datasource.druid.read.username=root
spring.datasource.druid.read.password=1
spring.datasource.druid.read.driver-class-name=com.mysql.jdbc.Driver

@Configuration
public class DruidDataSourceConfig {

    @Bean(name = "readDruidDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.druid.read")
    public DataSource readDruidDataSource() {
        return new DruidDataSource();
    }

    @Primary
    @Bean(name = "writeDruidDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.druid.write")
    public DataSource writeDruidDataSource() {
        return new DruidDataSource();
    }
}

# 配置文件内容
spring.datasource.url=jdbc:mysql://127.0.0.1:8888/test?useUnicode=false&autoReconnect=true&characterEncoding=utf-8
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
@ConfigurationProperties(prefix = "spring.datasource")
@Component
public class DatasourcePro {
    private String url;
    private String username;
    private String password;
    private String driverClassName; // 配置文件中是driver-class-name, 转驼峰命名便可以绑定成
    private String type;
    // standard getters and setters
}
@Controller
@RequestMapping(value = "/config")
public class ConfigurationPropertiesController {
    @Autowired
    private DatasourcePro datasourcePro;
    @RequestMapping("/test")
    @ResponseBody
    public Map<String, Object> test(){
        Map<String, Object> map = new HashMap<>();
        map.put("url", datasourcePro.getUrl());
        map.put("userName", datasourcePro.getUsername());
        map.put("password", datasourcePro.getPassword());
        map.put("className", datasourcePro.getDriverClassName());
        map.put("type", datasourcePro.getType());
        return map;
    }
}