maven初学请教，已经累了一天了但还是不能从《maven实战》中找到解决之道

Question

Missing:
----------
1) org.drools:drools-core:jar:5.2.0-alpha1

Try downloading the file manually from the project website.

2) org.drools:drools-compiler:jar:5.2.0-alpha1

Try downloading the file manually from the project website.

Then, install it using the command:

Answer 1

drools在仓库里最新版本是5.4.0.Beta1，5.2.0-alpha1这并不是发布版，不会一直存在，要么用5.2.0.Final要么用5.4.0.Beta1：
<dependency>
<groupId>org.drools</groupId>
<artifactId>drools-core</artifactId>
<version>5.4.0.Beta1</version>
</dependency>

<dependency>
<groupId>org.drools</groupId>
<artifactId>drools-compiler</artifactId>
<version>5.4.0.Beta1</version>
</dependency>