签出java maven项目后，我的pom一直都存在一些错误。 maven clean和maven install就像一个魅力，但每次出现以下错误时，maven更新项目或下载源代码/ java doc都会给我以下提示：

Could not download sources or javadoc
Could not read maven project
Some problems were encountered while processing the POMs:
[ERROR] Non-resolvable import POM: Failure to transfer io.github.jhipster:jhipster-dependencies:pom:3.0.1 from https://repo.maven.apache.org/maven2 was cached in the local repository,resolution will not be reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact io.github.jhipster:jhipster-dependencies:pom:3.0.1 from/to central (https://repo.maven.apache.org/maven2): connect timed out @ line 106,column 16
[ERROR] 'dependencies.dependency.version' for io.github.jhipster:jhipster-framework:jar is missing. @ line 118,column 15
[ERROR] 'dependencies.dependency.version' for org.springframework.boot:spring-boot-starter-cache:jar is missing. @ line 123,column 15
[ERROR] 'dependencies.dependency.version' for com.fasterxml.jackson.datatype:jackson-datatype-hibernate5:jar is missing. @ line 127,column 15
[ERROR] 'dependencies.dependency.version' for com.fasterxml.jackson.datatype:jackson-datatype-hppc:jar is missing. @ line 131,column 15
[ERROR] 'dependencies.dependency.version' for com.fasterxml.jackson.datatype:jackson-datatype-jsr310:jar is missing. @ line 135,column 15
[ERROR] 'dependencies.dependency.version' for com.fasterxml.jackson.module:jackson-module-afterburner:jar is missing. @ line 139,column 15
[ERROR] 'dependencies.dependency.version' for com.h2database:h2:jar is missing. @ line 867,column 17
[ERROR] 'dependencies.dependency.version' for com.jayway.jsonpath:json-path:jar is missing. @ line 148,column 15
[ERROR] 'dependencies.dependency.version' for io.springfox:springfox-swagger2:jar is missing. @ line 154,column 15

我位于公司代理服务器的后面，我已经在eclipse中对其进行了配置。

过去我与Maven无关，每次都只对我有用。 该项目是使用jHipster设置的。

希望有人可以帮助我。

谢谢。