ur3*_*r3k 3 java timezone spring-mvc spring-boot
当我在“Windows Server 2016 Datacenter”计算机上使用 Tomcat 9 运行 Springboot 2.3.8 应用程序时,我遇到时区问题。使用 Eclipse 或 Tomcat 9 在本地运行它不会触发该问题。
我在开始时使用以下命令设置时区:
@PostConstruct
public void init()
{
TimeZone.setDefault(TimeZone.getTimeZone("Europe/Berlin"));
Calendar now = Calendar.getInstance();
TimeZone timeZone = now.getTimeZone();
System.out.println(timeZone.getDisplayName());
}
Run Code Online (Sandbox Code Playgroud)
打印 ->中欧标准时间
但是,稍后当我调用其中一个端点时,我会像以前一样检查时区
Calendar now = Calendar.getInstance();
TimeZone timeZone = now.getTimeZone();
System.out.println(timeZone.getDisplayName());
Run Code Online (Sandbox Code Playgroud)
我得到 -->协调世界时
我假设时区没有在 @PostConstruct 上真正设置,或者稍后被某些东西覆盖。
我的问题是,什么可以进行更改以及如何修复它以使我的时区始终位于“欧洲/柏林”。
我尝试过如上所述更改应用程序内的时区,在tomcat中使用java参数并更改机器本身的时区,但在所有情况下,更改都会被覆盖,并且在调用和端点时我会得到UTC。
Pom.xml:
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.8.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.test</groupId>
<artifactId>project</artifactId>
<name>project</name>
<version>1.00</version>
<packaging>war</packaging>
<url>http://maven.apache.org</url>
<properties>
<java.version>1.8</java.version>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<maven.test.skip>true</maven.test.skip>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<!-- Master Versions -->
<spring.boot.version>2.3.8.RELEASE</spring.boot.version>
<oracle.version>12.2.0.1</oracle.version>
</properties>
<!-- Generates the Build Info/Properties -->
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>build-info</goal>
</goals>
</execution>
</executions>
</plugin>
<!-- Adds local jar to the final WAR -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
<webResources>
<resource>
<directory>${project.basedir}/libraries/</directory>
<targetPath>WEB-INF/lib</targetPath>
</resource>
</webResources>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<!-- Import dependency management from Spring Boot -->
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring.boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!-- Spring-boot-starter -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-rest</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-integration</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.ldap</groupId>
<artifactId>spring-ldap-core</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-ldap</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-jwt</artifactId>
<version>1.1.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security.oauth</groupId>
<artifactId>spring-security-oauth2</artifactId>
<version>2.5.0.RELEASE</version>
</dependency>
<dependency>
<groupId>com.unboundid</groupId>
<artifactId>unboundid-ldapsdk</artifactId>
</dependency>
<!-- javax -->
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
</dependency>
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>1.4.7</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
</dependency>
<dependency>
<groupId>javax.persistence</groupId>
<artifactId>javax.persistence-api</artifactId>
</dependency>
<!-- jjwt -->
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt</artifactId>
<version>0.9.1</version>
</dependency>
<!-- Oracle JDBC driver -->
<dependency>
<groupId>com.oracle.jdbc</groupId>
<artifactId>ojdbc8</artifactId>
<version>${oracle.version}</version>
</dependency>
<!-- HikariCP connection pool -->
<dependency>
<groupId>com.zaxxer</groupId>
<artifactId>HikariCP</artifactId>
</dependency>
<!-- Swagger -->
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-boot-starter</artifactId>
<version>3.0.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/commons-io/commons-io -->
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.8.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.tika/tika-example -->
<dependency>
<groupId>org.apache.tika</groupId>
<artifactId>tika-core</artifactId>
<version>1.25</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.tika/tika-parsers -->
<dependency>
<groupId>org.apache.tika</groupId>
<artifactId>tika-parsers</artifactId>
<version>1.25</version>
</dependency>
<!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-mock -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-mock</artifactId>
<version>2.0.8</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.junit.jupiter/junit-jupiter-api -->
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<scope>test</scope>
</dependency>
<!-- Spring-test -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
</dependency>
<!-- Mockito -->
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
</dependency>
<!-- Powermock -->
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-module-junit4</artifactId>
<version>2.0.9</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-api-mockito2</artifactId>
<version>2.0.9</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
Run Code Online (Sandbox Code Playgroud)
您正在使用可怕的日期时间类,这些类多年前已被现代java.time类取代。切勿使用Calendar、、、Date或TimeZone。SimpleDateFormat
你问:
\n\n\n可能会发生什么改变
\n
正如Ole VV 所评论的,您的 JVM\xe2\x80\x99s 当前默认时区可能会被其他一些 Java 代码覆盖。JVM 内任何应用程序的任何线程中的任何 Java 代码都可以随时更改 JVM\xe2\x80\x99s 当前的默认时区。此类更改会立即影响该 JVM 中运行的所有应用程序和线程。因此,这实际上使当前的默认时区成为一个不可靠的工具。
\n你问:
\n\n\n我该如何修复它以使我的时区始终位于“欧洲/柏林”。
\n
始终通过将对象传递给java.time方法来显式指定您的时区。ZoneId
不要依赖默认时区,而是始终将所需/预期时区指定为java.time中各种方法的可选参数。
\n而不是这个:
\nZonedDateTime now = ZonedDateTime.now() ; // Do NOT do this. Do not rely implicitly on the JVM\xe2\x80\x99s current default time zone.\nRun Code Online (Sandbox Code Playgroud)\n\xe2\x80\xa6 这样做:
\nZoneId z = ZoneId.of( "Europe/Berlin" ) ;\nZonedDateTime now = ZonedDateTime.now( z ) ; // Do this. Always pass the desired/expected time zone explicitly. \nRun Code Online (Sandbox Code Playgroud)\n要生成扩展为标准ISO 8601格式的文本以在方括号中附加时区名称,请调用toString。
String output = now.toString() ;\nRun Code Online (Sandbox Code Playgroud)\n要生成其他格式的文本,请让java.time自动本地化。
\nDateTimeFormatter f = DateTimeFormatter.ofLocalizedDateTime( FormatStyle.FULL ).withLocale( Locale.CANADA_FRENCH ) ;\nString output = now.format( f ) ;\nRun Code Online (Sandbox Code Playgroud)\n提示:在服务器上,通常最好将主机操作系统和 JVM 的默认时区设置为 UTC,偏移量为零时-分-秒。
\n提示:通常最好在 UTC 中进行业务逻辑、调试、日志记录和系统管理工作。时区只能用于 (a) 向用户展示,以及 (b) 业务规则要求的情况。
\n\njava.time框架内置于 Java 8 及更高版本中。这些类取代了麻烦的旧遗留日期时间类,例如java.util.Date, Calendar, & SimpleDateFormat。
要了解更多信息,请参阅Oracle 教程。并在 Stack Overflow 上搜索许多示例和解释。规格为JSR 310。
\nJoda -Time项目现在处于维护模式,建议迁移到java.time类。
\n您可以直接与数据库交换java.time对象。使用与JDBC 4.2或更高版本兼容的JDBC 驱动程序。不需要字符串,不需要类。Hibernate 5 和 JPA 2.2 支持java.time。java.sql.*
从哪里获取 java.time 类?
\n| 归档时间: |
|
| 查看次数: |
4052 次 |
| 最近记录: |