jsp站点地图的实现

     前段时间工作需要，需要构建一个面包屑导航，想到了了.net下的站点地图、面包屑导航控件，于是自己也做了简单的封装，形成了jsp下的站点地图，不足之处忘大家指正。

涉及到的文件：

SiteMapUtil.java 用来构建站点地图的工具类

BaseAction.java 调用输出导航栏

SiteMapNode.java 自定义站点节点

sitemap.xml  站点地图配置文件

 

直接上代码了： sitemap.xml站点地图的配置文件 节点由 href:action path(系统路径) title(标题)构成

<?xml version="1.0" encoding="UTF-8"?>  
  
<!--面包屑导航配置文件说明：
    title 是页面上显示的内容 即：连接名称
    href是超链接，如果没有动态数据则可以直接写入此配置文件 系统优先使用默认配置的href，最后使用系统后台动态赋予的值
    path是该请求页面的物理路径  path须与struts中设置的路径保持一致
-->  
<sitemap title="首页" path="/pages/stu/index_student.jsp" href="login.do?method=toUserIndex&amp;topMenu=index">
	<!--个人中心 -->
	<node  title="个人资料" path="/pages/stu/user/personal_data.jsp" href="leftNav.do?method=personalData&amp;type=data&amp;leftMenu=userInfo" >
    </node>
    <node  title="修改头像" path="/pages/stu/user/change_avatar.jsp" href="leftNav.do?method=personalData&amp;type=avatar">
    </node>
	<node  title="可用积分" path="/pages/stu/study/myPointList.jsp"  href="leftNav.do?method=myPointList">
    </node>
   	<node  title="我的档案" path="/pages/stu/user/myRecords_StudyCourse.jsp"  href="leftNav.do?method=myRecords&amp;leftMenu=myrecords">
   			<node title="已学课程" path="/pages/stu/user/myRecords_StudyCourse.jsp"/>
   			<node title="已获积分" path="/pages/stu/user/myRecords_StudyScore.jsp"/>
   			<node title="已获证书" path="/pages/stu/user/myRecords_CertificateUser.jsp"/>
   			<node title="已完成考试" path="/pages/stu/user/myRecords_ExamAchievement.jsp"/>
    </node>
   
</sitemap>

 SiteMapUtil.java

package com.maxi.base.util;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

/**
 * 站点导航的实现
 * @author mx
 */
public class SiteMapUtil  {

	private static List<String> allFullPaths = new ArrayList<String>();//记录站点地图的所有jsp的节点全路径
	private static List<String> allPaths = new ArrayList<String>();//记录站点地图的所有jsp路径
	
	public static void siteMapSetting(HttpServletRequest request,String path,String href){
		try {
			Map<String,SiteMapNode> map = (Map<String,SiteMapNode>)request.getSession().getAttribute("webSiteMap");
			String nowPath = (String)request.getSession().getAttribute("nowPath");
			if(map==null){
				SAXReader reader = new SAXReader();
				InputStream inputStream = SiteMapUtil.class.getClassLoader().getResourceAsStream("sitemap.xml");
				Document document = reader.read(inputStream);
				Element root = document.getRootElement();
				map =  new HashMap<String,SiteMapNode>();
				put2Map(root,null,map);
				request.getSession().setAttribute("webSiteMap", map);
			}
			if(allPaths.size()!=0&&!allPaths.contains(path)){
				return;
			}else{
				if(nowPath==null||"".equals(nowPath)){
					nowPath = path;
				}else{
					if(allFullPaths.contains(nowPath+path)){
						nowPath = nowPath + path;
					}else{
						if(nowPath.contains(path)){
							nowPath = nowPath.substring(0, nowPath.indexOf(path))+path;
						}else{
							for(String s:allFullPaths){
								if(s.endsWith(path)){
									nowPath = s;
									break;
								}
							}
						}
					}
				}
			}
			SiteMapNode target = map.get(nowPath);
			if(target==null){
				return;
			}else{
				StringBuffer content = new StringBuffer("您的当前位置：");
				List<String> titles = new ArrayList<String>();
				List<String> hrefs = new ArrayList<String>();
				while(target!=null){
					if(target.getTitle()!=null){
						titles.add(target.getTitle());
					}
					if(target.isVariable()&&path.equals(target.getPath())){
						hrefs.add(href);
						target.setHref(href);
					}else if(target.getHref()!=null&!target.getHref().equals("")){
						hrefs.add(target.getHref());
					}else {
						hrefs.add("");
						target.setHref("");
					}
					target = target.getParent();
				}
				
				for (int i = titles.size()-1; i >=0; i--) {
					String a = hrefs.get(i);
					if(a.equals("")){
						content.append(titles.get(i)+"--&gt;");
					}else{
						content.append("<a href='"+a+"'>"+titles.get(i)+"</a>--&gt;");
					}
				}
				if(content.length()>0){
					request.getSession().setAttribute("siteMapString", content.delete(content.length()-6, content.length()));
					request.getSession().setAttribute("nowPath", nowPath);
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	//将xml中的所有节点转换为自定义节点并存储进入Map中，key:fullpath(全路径，可唯一确定一个节点)
	public static void put2Map(Element root,SiteMapNode parent,Map map){
		SiteMapNode node = getXML2Bean(root);
		if(parent!=null){
			node.setParent(parent);
			parent.getChildren().add(node);
		}
		map.put(node.getFullPath(), node);
		allFullPaths.add(node.getFullPath());
		allPaths.add(node.getPath());
		Iterator<Element> it = root.elementIterator();
		while(it.hasNext()){
			put2Map(it.next(),node,map);
		}
	}
	//将xml中读取的Element转换成自定义的节点对象：SiteMapNode
	public static SiteMapNode getXML2Bean(Element ele){
		SiteMapNode node = new SiteMapNode();
		node.setPath(ele.attribute("path").getText());
		node.setTitle(ele.attribute("title").getText());
		node.setHref(ele.attribute("href")==null||ele.attribute("href").equals("")?"":ele.attribute("href").getText());
		node.setVariable(ele.attribute("href")==null||ele.attribute("href").equals("")?true:false);
		return node;
	}
}

 自定义节点SiteMapNode：

 package com.zohl.quicklms.base.util;

import java.util.ArrayList;
import java.util.List;

public class SiteMapNode {
	private String title; //节点显示名称
	private String path; //jsp页面全路径 与 struts配置文件中的path保持一致
	private String href; //action全路径
	
	private boolean variable;//记录该几点的href是否是动态获取的 当配置文件中已经定义好href则 variable = false; 否则为true
	private String fullPath;//本节点在节点树中的路径 = 父节点的全路径+本节点的path
	private SiteMapNode parent;//父节点
	private List<SiteMapNode> children = new ArrayList<SiteMapNode>();//子节点集合
	
	public String getPath() {
		return path;
	}
	public void setPath(String path) {
		this.path = path;
	}
	public String getHref() {
		return href;
	}
	public void setHref(String href) {
		this.href = href;
	}
	public List<SiteMapNode> getChildren() {
		return children;
	}
	public void setChildren(List<SiteMapNode> children) {
		this.children = children;
	}
	public SiteMapNode getParent() {
		return parent;
	}
	public void setParent(SiteMapNode parent) {
		this.parent = parent;
	}
	public String getTitle() {
		return title;
	}
	public void setTitle(String title) {
		this.title = title;
	}
	public String getFullPath() {
		if(fullPath==null||"".equals(fullPath)){
			if(parent!=null){
				fullPath = parent.getFullPath()+path;
			}else{
				fullPath = path;
			}
		}
		return fullPath;
	}
	public void setFullPath(String fullPath) {
		this.fullPath = fullPath;
	}
	public boolean isVariable() {
		return variable;
	}
	public void setVariable(boolean variable) {
		this.variable = variable;
	} 
}

 BaseAction.java关键在于调用

@Override
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		String url = request.getRequestURL().toString();
		String queryString = request.getQueryString();
		ActionForward forward = super.execute(mapping, form, request, response);
		try{
			request.getSession().setAttribute("siteMapString", "");
			//面包屑导航
			if(forward!=null&&forward.getPath()!=null&&!forward.getPath().equals("")){
				SiteMapUtil.siteMapSetting(request, forward.getPath(), url+"?"+queryString);
			}
		}catch(Exception exp){
			exp.printStackTrace();
		} 
		return forward;
	}

 

评论

1 楼 TellYouWhy 2012-03-14