spring - ClassNotFoundException : org. springframework.hateoas.Resource 即使我添加了依赖项

Question

我的 pom.xml 中有以下内容

<dependency>
    <groupId>org.springframework.hateoas</groupId>
    <artifactId>spring-hateoas</artifactId>
</dependency>

但我仍然收到以下消息

Caused by: java.lang.NoClassDefFoundError: org/springframework/hateoas/Resource
    at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_191]
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_191]
    at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_191]
    at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:668) ~[spring-core-5.1.5.RELEASE.jar:5.1.5.RELEASE]
    ... 21 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.hateoas.Resource
    at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[na:1.8.0_191]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_191]
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) ~[na:1.8.0_191]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_191]
    ... 25 common frames omitted

我尝试删除 .m2 的内容文件夹并再次下载所有依赖项。我尝试强制更新 maven 项目，但在启动 Spring Boot 项目时仍然收到消息。任何人都知道为什么即使我添加了依赖项也会得到这个？

Answer 1

对于 Spring Boot 使用 spring-boot-starter-hateoas依赖

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-hateoas</artifactId>
  <version>2.1.4.RELEASE</version>
</dependency>