XML的复杂关系解析

问个问题，想问问大家一般怎么处理XML,比如，下面这段代码，在<participants>下面有多个participant，每个participant下面又有一个role，而这个role是在roles中描述的

我想问一下,这种相互包含的关系应该怎么解析呢？大家一般都是怎么做的，我用的是java做的



XML code:

<?xml version="1.0" encoding="UTF-8"?>
<orgdata>
<participants>
<participant id="PA-b7a79138-158d-4fce-b875-61029bb85431">
<userid>prod-coordinator</userid>
<password>bUlBkHMDhGQMFWNZUYdBGwmcoqQ=</password>
<firstname>Florian</firstname>
<lastname>Lang (production coordinator)</lastname>
<description />
<notes />
<isAdministrator>false</isAdministrator>
<isAvailable>true</isAvailable>
<roles>
<role>RO-9b1bf293-9c1e-4868-8df0-f1f1911f5fca</role>
</roles>
<positions />
<capabilities />
<privileges>00000000</privileges>
</participant>
</participants>
<roles>
<role id="RO-d2e982aa-96b7-40df-9b27-e78a5cb0c73b">
<name>1st AD</name>
<description />
<notes />
</role>
<role id="