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springboot松散绑定


springboot松散绑定

什么是松散绑定,松散绑定是springboot在使用 @EnableConfigurationProperties 注解里面提出来的,也就是说在application.xml文件中,可以不那么严格的去命名变量名,比如说ipaddress可以在配置文件中有多种出线形势,但是在代码里面还是要以驼峰命名。

主要看ipaddress这个松散绑定

application.yml文件

servers:  ipAddress: 192.168.0.1    ipaddress: 192.168.0.1    ip_Address: 192.168.0.1  ip-address: 192.168.0.1  port: 1234  timeout: -1datasource:  driver-class-name: com.alibaba.druid.proxy.DruidDriver

核心代码

ipAddress: 192.168.0.1  //驼峰命名ipaddress: 192.168.0.1  // ip_Address: 192.168.0.1  // 下划线命名ip-address: 192.168.0.1 // -线命名

ServerConfig配置类

import lombok.Data;import org.springframework.boot.context.properties.ConfigurationProperties;import org.springframework.stereotype.Component;//@Component@Data@ConfigurationProperties(prefix = "servers")public class ServerConfig {    private String ipAddress;    private int port;    private int timeout;}

springboot启动类

import com.alibaba.druid.pool.DruidDataSource;import com.bubaiwantong.config.ServerConfig;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import org.springframework.boot.context.properties.ConfigurationProperties;import org.springframework.boot.context.properties.EnableConfigurationProperties;import org.springframework.context.ConfigurableApplicationContext;import org.springframework.context.annotation.Bean;@SpringBootApplication@EnableConfigurationProperties(ServerConfig.class)public class Springboot13ConfigurationApplication {    @Bean    @ConfigurationProperties(prefix = "datasource")    public DruidDataSource dataSource(){ DruidDataSource ds = new DruidDataSource(); return ds;    }    public static void main(String[] args) { ConfigurableApplicationContext context = SpringApplication.run(Springboot13ConfigurationApplication.class, args); ServerConfig bean = context.getBean(ServerConfig.class); System.out.println(bean); DruidDataSource dataSource = context.getBean(DruidDataSource.class); System.out.println(dataSource.getDriverClassName());    }}

springboot松散绑定

注意:如果使用@Value注解注入属性值,配置文件中的名称和代码中的名称必须要保持一致,否则会报错。