Java 如何强制 Spring Boot JVM 进入 UTC 时区？

How do I force a Spring Boot JVM into UTC time zone?

提问by Chloe

I saw Force Java timezone as GMT/UTC

我看到Force Java 时区为 GMT/UTC

I tried

我试过

• mvn spring-boot:run -Dexec.args="-Duser.timezone=GMT"
• mvn spring-boot:run -Dexec.args="-Duser.timezone=UTC"
• user.timezone=UTCin config/application.properties
• user.timezone=GMT

• In the pom.xml:

      <plugin>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-maven-plugin</artifactId>
          <configuration>
              <properties>
                <spring-boot.run.jvmArguments>-Duser.timezone=UTC</spring-boot.run.jvmArguments>
              </properties>
          </configuration>
      </plugin>
  

• mvn spring-boot:run -Dspring-boot.run.jvmArguments="-Duser.timezone=UTC"

• mvn spring-boot:run -Dexec.args="-Duser.timezone=GMT"
• mvn spring-boot:run -Dexec.args="-Duser.timezone=UTC"
• user.timezone=UTC在 config/application.properties
• user.timezone=GMT

• 在 pom.xml 中：

      <plugin>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-maven-plugin</artifactId>
          <configuration>
              <properties>
                <spring-boot.run.jvmArguments>-Duser.timezone=UTC</spring-boot.run.jvmArguments>
              </properties>
          </configuration>
      </plugin>
  

• mvn spring-boot:run -Dspring-boot.run.jvmArguments="-Duser.timezone=UTC"

But it prints out

但它打印出来

System.out.println(TimeZone.getDefault());

sun.util.calendar.ZoneInfo[id="America/New_York",offset=-18000000,dstSavings=3600000,useDaylight=true,transitions=235,lastRule=java.util.SimpleTimeZone[id=America/New_York,offset=-18000000,dstSavings=3600000,useDaylight=true,startYear=0,startMode=3,startMonth=2,startDay=8,startDayOfWeek=1,startTime=7200000,startTimeMode=0,endMode=3,endMonth=10,endDay=1,endDayOfWeek=1,endTime=7200000,endTimeMode=0]]

sun.util.calendar.ZoneInfo[id="America/New_York",offset=-18000000,dstSavings=3600000,useDaylight=true,transitions=235,lastRule=java.util.SimpleTimeZone[id=America/New_York,offset=- 18000000,dstSavings=3600000,useDaylight=true,startYear=0,startMode=3,startMonth=2,startDay=8,startDayOfWeek=1,startTime=7200000,startTimeMode=0,endMode=3,endMonth=10,endDay=1, endDayOfWeek=1,endTime=7200000,endTimeMode=0]]

Spring Boot 1.5.19, Java 8

Spring Boot 1.5.19，Java 8

采纳答案by Karol Dowbecki

Use spring-boot.run.jvmArgumentspropertyif you want to pass JVM options from Maven Spring Boot Plugin to forked Spring Boot application:

如果要将 JVM 选项从 Maven Spring Boot 插件传递到分叉的 Spring Boot 应用程序，请使用spring-boot.run.jvmArguments属性：

<properties>
  <spring-boot.run.jvmArguments>-Duser.timezone=UTC</spring-boot.run.jvmArguments>
</properties>

This is be equivalent to command line syntax:

这相当于命令行语法：

mvn spring-boot:run -Dspring-boot.run.jvmArguments="-Duser.timezone=UTC"

or when running a fully packaged Spring Boot application:

或者在运行完全打包的 Spring Boot 应用程序时：

java -Duser.timezone=UTC -jar app.jar

回答by Jabari Dash

You can configure the timezone with a class annotated with the @Configurationannotation. You can put it anywhere in your project. I typically house all classes that fit under this category in a package called config. Make sure you add the @PostConstructannotation to the method that is actually setting the timezone.

您可以使用带有@Configuration注释的类来配置时区。你可以把它放在你项目的任何地方。我通常将所有适合此类别的类放在一个名为config. 确保将@PostConstruct注释添加到实际设置时区的方法中。

import org.springframework.context.annotation.Configuration;

import javax.annotation.PostConstruct;

@Configuration
public class LocaleConfig {

    @PostConstruct
    public void init() {

        TimeZone.setDefault(TimeZone.getTimeZone("UTC"));

        System.out.println("Date in UTC: " + new Date().toString());
    }
}

See the original article

见原文

回答by YONGSOO KIM

I think you can set your application's timezone on your application level. I think this link will help you. https://www.onlinetutorialspoint.com/spring-boot/how-to-set-spring-boot-settimezone.html

我认为您可以在应用程序级别设置应用程序的时区。我认为这个链接会对你有所帮助。 https://www.onlinetutorialspoint.com/spring-boot/how-to-set-spring-boot-settimezone.html

So What you need to do is adding "@PostConstruct" annotation to the main class where "@SpringBootApplication" annotation is located, and add timezone setting method there. Here is an example.

那么你需要做的是在“@SpringBootApplication”注解所在的主类中添加“@PostConstruct”注解，并在那里添加时区设置方法。这是一个例子。

@SpringBootApplication
public class HellotimezoneApplication {

    public static void main(String[] args) {
        SpringApplication.run(HellotimezoneApplication.class, args);
    }

    @PostConstruct
    public void init(){
      // Setting Spring Boot SetTimeZone
      TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
    }

}

Hope this can help you!

希望这可以帮到你！