添加项目属性工具类方法

在创建项目时，有时需要定制项目属性

public static void addProjectNature(IProject project, String nature,
			IProgressMonitor monitor) throws CoreException {
		if (project != null && nature != null) {
			if (!project.hasNature(nature)) {
				IProjectDescription desc = project.getDescription();
				String[] oldNatures = desc.getNatureIds();
				String[] newNatures = new String[oldNatures.length + 1];
				newNatures[0] = nature;
				if (oldNatures.length > 0) {
					System.arraycopy(oldNatures, 0, newNatures, 1,
							oldNatures.length);
				}
				desc.setNatureIds(newNatures);
				project.setDescription(desc, monitor);
			}
		}
	}

使用例子：
***Util.addProjectNature(project, New_NATURE, null);