java动态遍历菜单_java动态生成菜单，jsp页面有没有什么好的遍历方法

jsp代码如下，只遍历到3级，4567级要继续遍历下去重复代码太多了，有没有好的解决办法？

没有父级id是一级菜单，有父级id没有url是有子菜单的二级菜单，以此类推

<!-- 没有parentId,有url的是一级菜单 -->

<c:if test="${empty target.parentId  and !empty target.url }">

<li><a href='<c:url value="${target.url }"></c:url>'> <i

class="${target.icon }"></i>${target.name }

</a></li>

</c:if>

<!-- 没有parentId,也没有url的菜单是有二级菜单的 -->

<c:if test="${empty target.parentId  and empty target.url  }">

<li><i class="${target.icon }"></i>${target.name }

<ul>

<c:forEach items="${target.childMenus }" var="childMenu">

<!-- 有url的没有子菜单 -->

<c:if test="${!empty childMenu.url }">

<li><a href='<c:url value="${childMenu.url }"></c:url>'>

<i class="${childMenu.icon }"></i>${childMenu.name }

</a></li>

</c:if>

<!-- 三级菜单 -->

<c:if test="${empty childMenu.url }">

<i class="${childMenu.icon }"></i>${childMenu.name }

<ul>

<c:forEach items="${childMenu.childMenus }" var="thirdMenu">

<!-- 有url的没有子菜单 -->

<c:if test="${!empty thirdMenu.url }">

<li><a href='<c:url value="${thirdMenu.url }"></c:url>'>

<i class="${thirdMenu.icon }"></i>${thirdMenu.name }

</a></li>

</c:if>

<!-- 四级菜单 -->

<c:if test="${empty thirdMenu.url }">

<c:forEach items="${thirdMenu.childMenus }" var="fourthMenu">

<li>

<a href='<c:url value="${fourthMenu.url }"></c:url>'>

<i class="${fourthMenu.icon }"></i>${fourthMenu.name }

</a>

</li>

</c:forEach>

</c:if>

</c:forEach>

</ul>

</c:if>

</c:forEach>

</ul>

</li>

</c:if>

</c:forEach>

菜单数据：

Menu [id=1, name=Forms, parentId=, url=forms.html, icon=fa fa-edit, order=0, childMenus=null]

Menu [id=2, name=UI Elements, parentId=, url=, icon=fa fa-wrench, order=1, childMenus=[Menu [id=3, name=Buttons, parentId=2, url=buttons.html, icon=, order=0, childMenus=null], Menu [id=4, name=Icons, parentId=2, url=icons.html, icon=null, order=1, childMenus=null]]]

Menu [id=5, name=Multi-Level Dropdown, parentId=, url=, icon=fa fa-sitemap, order=2, childMenus=[Menu [id=6, name=Second Level Item, parentId=5, url=second.html, icon=null, order=0, childMenus=null], Menu [id=7, name=Third Level, parentId=5, url=null, icon=, order=1, childMenus=[Menu [id=8, name=Third Level Item, parentId=7, url=, icon=null, order=0, childMenus=[Menu [id=9, name=Fouth Level, parentId=8, url=fouth.html, icon=null, order=0, childMenus=null]]]]]]]

数据库截图：