对新项目clean install 的时候，报错了，提示没有合法的证书，报错信息如下

[ERROR] Failed to execute goal on project springbootactivity: Could not resolve dependencies for project com.example:springbootactivity:jar:0.0.1-SNAPSHOT: Failed to collect dependencies at org.springframework.boot:spring-boot-starter-test:jar:2.4.1: Failed to read artifact descriptor for org.springframework.boot:spring-boot-starter-test:jar:2.4.1: Could not transfer artifact org.springframework.boot:spring-boot-starter-test:pom:2.4.1 from/to alimaven (http://maven.aliyun.com/nexus/content/groups/public/): sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target -> [Help 1]

打开Idea，File->Settings->Maven->Runner，在VM Options中填入如下配置即可

-Dmaven.wagon.http.ssl.insecure=true -Dmaven.wagon.http.ssl.allowall=true

再次clean install，就可以BUILD SUCCESS

PS

这里唯一的缺点就是每新建一个项目都要这样设置一次，暂时这样先用着吧，后面再彻底解决。