springboot 读取配置信息

Spring Boot可以通过 @PropertySource, @Value, @Environment, @ConfigurationProperties 来绑定变量

1.读取application文件

key.value=123456
key.password=123456

　　@Value注解读取

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

@Component
public class ToolsConfilg{

　　@Value("${key.value}")
   private String value;
   
   @Value("${key.password}") 
   private String password; 
   
   //...GETSET
 }

　　@ConfigurationProperties注解读取

@Component
@ConfigurationProperties(prefix = "info")
public class ToolsConfilg{

   private String key;
   
   private String password; 
   
   //...GETSET
 }

　　读取指定文件

　　在 resources（资源目录）下建立 config/datasource-config.properties

datasource.username=root

datasource.password=root

　　@PropertySource+@Value注解读取 (@PropertySource不支持yml文件读取)

@Component
@PropertySource(value = { "config/datasource-config.properties" })
public class DatasourceConfig{
   @Value("${datasource.username}")
   private String username;
   @Value("${datasource.password}")
   private String password;
   public String getUsername() {
   
　　....get/set

}

　　@PropertySource+@ConfigurationProperties注解读取

@Component
@ConfigurationProperties(prefix = "datasource")
@PropertySource(value = { "config/datasource-config.properties" })
public class DatasourceConfig{
   private String username;
   private String password;
   
　　...get/set

}

　　Environment读取

@Autowired
private Environment env;
// 获取参数
String getProperty(String key);