Cannot resolve symbol 'CreateUserRequest'

如果在使用Java High Level REST Client时出现“Cannot resolve symbol 'CreateUserRequest'”错误，可能是因为没有正确导入相关的类或jar包。 请确保已经在项目中引入了elasticsearch-rest-high-level-client.jar包，并且在代码中正确导入相关的类。例如： ```java import org.elasticsearch.action.admin.cluster.health.ClusterHealthRequest; import org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse; import org.elasticsearch.client.RequestOptions; import org.elasticsearch.client.RestHighLevelClient; import org.elasticsearch.client.indices.CreateIndexRequest; import org.elasticsearch.client.indices.CreateIndexResponse; import org.elasticsearch.common.settings.Settings; import org.elasticsearch.common.xcontent.XContentType; import org.elasticsearch.rest.RestStatus; import org.elasticsearch.security.authc.support.Hasher; import org.elasticsearch.xpack.security.authc.support.UsernamePasswordToken; import org.elasticsearch.xpack.security.client.SecurityClient; import org.elasticsearch.xpack.security.client.SecurityClientBuilder; import org.elasticsearch.xpack.security.client.SecurityClients; import org.elasticsearch.xpack.security.client.User; import org.elasticsearch.xpack.security.client.authentication.AuthenticationResult; import org.elasticsearch.xpack.security.client.authentication.HttpAuthenticationFailure; import org.elasticsearch.xpack.security.client.authentication.Token; import org.elasticsearch.xpack.security.client.authorization.Authorizations; import org.elasticsearch.xpack.security.client.privileges.Privileges; import org.elasticsearch.xpack.security.client.role.Role; import org.elasticsearch.xpack.security.client.role.Roles; import org.elasticsearch.xpack.security.client.user.Users; import org.elasticsearch.xpack.security.transport.ssl.SSLConfiguration; import org.elasticsearch.xpack.security.transport.ssl.SSLContexts; import org.elasticsearch.xpack.security.transport.ssl.TrustConfig; import org.elasticsearch.xpack.security.transport.ssl.VerificationMode; ``` 如果还是无法解决问题，请检查是否有其他依赖项缺失或版本不兼容的情况。