SpringBoot中静态类使用配置文件经常遇到读取为NULL的情况，现在我就告诉大家。

c.jwt.toke.secret=xxx
c.jwt.toke.issuer=xxx
c.jwt.toke.userno=xx
c.jwt.toke.date=ss

 
import javax.annotation.PostConstruct;
 
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
 
@Configuration
@PropertySource({"classpath:application-jwt.properties"})
@ConfigurationProperties(prefix = "c.jwt.toke")
public class JwtProConfig {
public static String TOKEN_SECRET;
public static String ISSUER;
public static String USERNO;
public static Long DATE;// = 1L; //10秒钟
public String  secret;
public String  issuer;
public String  userno;
public Long  date;
 
//这个一定要加
@PostConstruct
public void JwtProConfigValue() {
    TOKEN_SECRET = this.secret;
    ISSUER = this.issuer;
    USERNO = this.userno;
    //DATE = Long.valueOf(this.date);
    DATE = this.date;
}
 
 
public String getSecret() {
    return secret;
}
 
 
public void setSecret(String secret) {
    this.secret = secret;
}
 
 
public String getIssuer() {
    return issuer;
}
 
 
public void setIssuer(String issuer) {
    this.issuer = issuer;
}
 
 
public String getUserno() {
    return userno;
}
 
 
public void setUserno(String userno) {
    this.userno = userno;
}
 
 
public Long getDate() {
    return date;
}
 
 
public void setDate(Long date) {
    this.date = date;
}
 
}