基于Spring boot @Value 注解注入属性值的操作方法

@PropertySource("classpath:my.properties")
@RestController
public class ValueController {

 /**
 *Get in application.properties Properties configured in
 */
 @Value("${user.name}")
 private String name;

 /**
 *Get in my.properties Configuration properties in
 */
 @Value("${user.password}")
 private String password;

}

/**
 *Injection array (automatically split according to ",")
 */
@Value("${tools}")
private String[] toolArray;

/**
 *Injection list form (automatic segmentation based on "," and)
 */
@Value("${tools}")
private List<String> toolList;

/**
 *实例化一个字符串，并赋予默认值
 */
@Value
private String wechatSubscription;

/**
 *读取系统的环境变量
 */
@Value("#{systemProperties['os.name']}")
private String systemPropertiesName;

/**
 *注入表达式计算结果
 */
@Value("#{ T(java.lang.Math).random() * 100.0 }")
private double randomNumber;

/**
 *读取一个bean:config的tool属性并注入
 */
@Value("#{config.tool}")
private String tool;

/**
 *将words用“|”分隔为字符串数组
 */
@Value("#{'${words}'.split('\|')}")
private List<String> numList;

/**
 *注入一个文件资源
 */
@Value("classpath:config.xml")
private Resource resourceFile;

/**
 *注入 URL 资源
 */
@Value("http://www.choupangxia.com")
private URL homePage;

/**
 *If IP is not configured in the property, the default value is used
 */
@Value("${ip:127.0.0.1}")
private String ip;

/**
 *If the value of port is not obtained in the system properties, 8888 is used.
 */
@Value("#{systemProperties['port']?:'8888'}")
private String port;