解释Basecamp项目java类。

These java classes will fetch the XML from Basecamp and populate corresponding POJOs. Basecamp projects, companies, people, milestones, todo lists, and todo items are handled. Exporting back to Basecamp is not currently included. These classes require JAXB2 (https://jaxb.dev.java.net/) and Apache HTTP client (http://hc.apache.org/httpclient-3.x/) jars. You"ll also need a current junit jar if you want to run the test case. -- Basecamp is a registered trademark of 37signals.