在MainServlet中，当初始化Resource Code完毕后，就开始初始化公司信息，对应代码如下：if (_log.isDebugEnabled()) { _log.debug("Initialize companies"); } try { initCompanies(); } ..
它会调用initCompanies()方法：
protected void initCompanies() throws Exception { ServletContext servletContext = getServletContext(); String[] webIds = PortalInstances.getWebIds(); for (int i = 0; i < webIds.length; i++) { PortalInstances.initCompany(servletContext, webIds[i]); } }从这里可以看出，它先02行获得Servlet上下文，然后04行获得webId的数组：
分析04行：
我们跟进到PortalInstances的getWebIds方法：
public static String[] getWebIds() { return _instance._getWebIds(); }它最终是调用_getWebIds()方法：
private String[] _getWebIds() { if (_webIds != null) { return _webIds; } if (Validator.isNull(PropsValues.COMPANY_DEFAULT_WEB_ID)) { throw new RuntimeException("Default web id must not be null"); } try { List<Company> companies = CompanyLocalServiceUtil.getCompanies( false); List<String> webIdsList = new ArrayList<String>(companies.size()); for (Company company : companies) { String webId = company.getWebId(); if (webId.equals(PropsValues.COMPANY_DEFAULT_WEB_ID)) { webIdsList.add(0, webId); } else { webIdsList.add(webId); } } _webIds = webIdsList.toArray(new String[webIdsList.size()]); } catch (Exception e) { _log.error(e, e); } if ((_webIds == null) || (_webIds.length == 0)) { _webIds = new String[] {PropsValues.COMPANY_DEFAULT_WEB_ID}; } return _webIds; }