使用SAXReader对XML进行操作

该例子主要使用SAXReader对XML进行操作，browse.xml是Ango框架里面的XML文件

采用两种方法，第一种的全部是iterator，另外一种采用了部分的for each

代码如下

 private void doBrowse(ServletContextEvent sce) {
    	HashMap<String,BrowseBean1> map1 = new HashMap<String,BrowseBean1>();
		SAXReader saxReader = new SAXReader();
		Document document = null;
		// xml文件位置
		String path = this.getClass().getResource("/").getPath();
		//String pString = this.getClass().getResource(pString).getPath();
		String filePath = path.substring(0, path.length()- "classes/".length())+"browse.xml";
		//logger.warn(path);
		//logger.warn(filePath);
		try {
			document = saxReader.read(new File(URLDecoder.decode(filePath, "utf-8")));
		} catch (UnsupportedEncodingException e) {
			// 路径中文解码错误
			e.printStackTrace();
		} catch (DocumentException e) {
			e.printStackTrace();
			logger.warn("查询操作的xml文档异常");
		}
		List list = document.selectNodes("/BrowseElements/element/@flag");
		//logger.warn(list);
		Iterator iter = list.iterator();
		
		/**
		 * 自己写的方法，里面没有全部使用迭代器，用的for each 循环  start
		 */
		while(iter.hasNext()){
			Attribute attribute = (Attribute) iter.next();
			String flag = attribute.getValue();
			List listTemp1 = document.selectNodes("/BrowseElements/element[@flag='"
					+ flag + "']/@pageSize");
			Iterator iterTemp1 = listTemp1.iterator();
			int pageSize = 0;
			while (iterTemp1.hasNext()) {
				Attribute attribute1 = (Attribute) iterTemp1.next();
				pageSize = Integer.parseInt(attribute1.getValue());
			}
			BrowseBean1 browseBean1 = new BrowseBean1();
			browseBean1.setPageSize(pageSize);
			List listTemp2 = document.selectNodes("/BrowseElements/element[@flag='"
					+ flag + "']/sql/@value");
			LinkedHashMap<String,BrowseBean2> map2 = new LinkedHashMap<String,BrowseBean2>();
			for(Object ob : listTemp2){
				//System.out.println(ob);
				String value = ((Attribute) ob).getValue();
				//System.out.println(value);
				BrowseBean2 browseBean2 = new BrowseBean2();
				List listTemp3 = document.selectNodes("/BrowseElements/element[@flag='"
						+ flag + "']/sql[@value='"+value+"']/@key");
				for(Object ob1 : listTemp3){
					String key = ((Attribute) ob1).getValue();
					browseBean2.setKey(key);
					//System.out.println(key);
				}
				List listTemp4 = document.selectNodes("/BrowseElements/element[@flag='"
						+ flag + "']/sql[@value='"+value+"']/struct");
				ArrayList<StructBean> struct = new ArrayList<StructBean>();
				for(Object ob2 : listTemp4){
					StructBean structBean = new StructBean();
					String structValueString = ((Element) ob2).getText();
					String sessionString = ((Element) ob2).attributeValue("session");
					String requestString = ((Element) ob2).attributeValue("request");
					structBean.setStructValue(structValueString);
					structBean.setSession(sessionString);
					structBean.setRequest(requestString);
					struct.add(structBean);
				}
				browseBean2.setStruct(struct);
				List listTemp5 = document.selectNodes("/BrowseElements/element[@flag='"
						+ flag + "']/sql[@value='"+value+"']/param");
				ArrayList<ParamBean> param = new ArrayList<ParamBean>();
				for(Object ob3 : listTemp5){
					ParamBean paramBean = new ParamBean();
					String paramValue = ((Element) ob3).getText();
					String notNull = ((Element) ob3).attributeValue("notNull");
					String session = ((Element) ob3).attributeValue("session");
					String request = ((Element) ob3).attributeValue("request");
					String drop = ((Element) ob3).attributeValue("drop");
					String timeStart = ((Element) ob3).attributeValue("timeStart");
					String timeEnd = ((Element) ob3).attributeValue("timeEnd");
					paramBean.setParamValue(paramValue);
					paramBean.setNotNull(notNull);
					paramBean.setSession(session);
					paramBean.setRequest(request);
					paramBean.setDrop(drop);
					paramBean.setTimeStart(timeStart);
					paramBean.setTimeEnd(timeEnd);
					param.add(paramBean);
					//System.out.println(paramBean.getDrop());
					if(((Element) ob3).getText()==null||"".equals(((Element) ob3).getText())){
						System.out.println("该<element>paramBean为空，即不需要参数");
						//节点类似<param></param>,这样空的才行，但是实际上如果不需要传参数的话，根本就不用写<param>这个节点，那这个判断有点问题
					}else{
						System.out.println("paramValue为："+paramBean.getParamValue());
					}
				}
				browseBean2.setParam(param);
				List listTemp6 = document.selectNodes("/BrowseElements/element[@flag='"
						+ flag + "']/sql[@value='"+value+"']/title");
				ArrayList<String> title = new ArrayList<String>();
				for(Object ob4 : listTemp6){
					String titleString =  ((Element) ob4).getText();
					title.add(titleString);
					//System.out.println(titleString);
					//System.out.println(title);
				}
				browseBean2.setTitle(title);
				List listTemp7 = document.selectNodes("/BrowseElements/element[@flag='"
						+ flag + "']/sql[@value='"+value+"']/output");
				ArrayList<String> output = new ArrayList<String>();
				for(Object ob5 : listTemp7){
					output.add(((Element) ob5).getText());
				}
				browseBean2.setOutput(output);
				map2.put(value, browseBean2);
			}
			browseBean1.setMap(map2);
			map1.put(flag, browseBean1);
			System.out.println("遍历完browse.xml中的一个<element></element>");
		}
		/**
		 * 自己写的方法，里面没有全部使用迭代器，用的for each 循环   end
		 */
		
		
		/**
		 * Ango框架写法，全部使用iterator start
		 */
		while (iter.hasNext()) {
			Attribute attribute = (Attribute) iter.next();
			String flag = attribute.getValue();
			
			System.out.println(flag);
			
			List listTemp1 = document.selectNodes("/BrowseElements/element[@flag='"
					+ flag + "']/@pageSize");
			Iterator iterTemp1 = listTemp1.iterator();
			int pageSize = 0;
			while (iterTemp1.hasNext()) {
				Attribute attribute1 = (Attribute) iterTemp1.next();
				pageSize = Integer.parseInt(attribute1.getValue());
			}
			BrowseBean1 browseBean1 = new BrowseBean1();
			browseBean1.setPageSize(pageSize);
			List listTemp2 = document.selectNodes("/BrowseElements/element[@flag='"
					+ flag + "']/sql/@value");
			Iterator iterTemp2 = listTemp2.iterator();
			LinkedHashMap<String,BrowseBean2> map2 = new LinkedHashMap<String,BrowseBean2>();
			while (iterTemp2.hasNext()) {
				Attribute attribute2 = (Attribute) iterTemp2.next();
				String value = attribute2.getValue();
				BrowseBean2 browseBean2 = new BrowseBean2();
				List listTemp3 = document.selectNodes("/BrowseElements/element[@flag='"
						+ flag + "']/sql[@value='"+value+"']/@key");
				Iterator iterTemp3 = listTemp3.iterator();
				while (iterTemp3.hasNext()) {
					Attribute attribute3 = (Attribute) iterTemp3.next();
					String key = attribute3.getValue();
					browseBean2.setKey(key);
				}
				List listTemp4 = document.selectNodes("/BrowseElements/element[@flag='"
						+ flag + "']/sql[@value='"+value+"']/struct");
				Iterator iterTemp4 = listTemp4.iterator();
				ArrayList<StructBean> struct = new ArrayList<StructBean>();
				while (iterTemp4.hasNext()) {
					Element element = (Element) iterTemp4.next();
					StructBean structBean = new StructBean();
					structBean.setStructValue(element.getText());
					structBean.setSession(element.attributeValue("session"));
					structBean.setRequest(element.attributeValue("request"));
					struct.add(structBean);
				}
				browseBean2.setStruct(struct);
				List listTemp5 = document.selectNodes("/BrowseElements/element[@flag='"
						+ flag + "']/sql[@value='"+value+"']/param");
				Iterator iterTemp5 = listTemp5.iterator();
				ArrayList<ParamBean> param = new ArrayList<ParamBean>();
				while (iterTemp5.hasNext()) {
					Element element = (Element) iterTemp5.next();
					ParamBean paramBean = new ParamBean();
					paramBean.setParamValue(element.getText());
					paramBean.setNotNull(element.attributeValue("notNull"));
					paramBean.setSession(element.attributeValue("session"));
					paramBean.setRequest(element.attributeValue("request"));
					paramBean.setDrop(element.attributeValue("drop"));
					paramBean.setTimeStart(element.attributeValue("timeStart"));
					paramBean.setTimeEnd(element.attributeValue("timeEnd"));
					param.add(paramBean);
				}
				browseBean2.setParam(param);
				List listTemp6 = document.selectNodes("/BrowseElements/element[@flag='"
						+ flag + "']/sql[@value='"+value+"']/title");
				Iterator iterTemp6 = listTemp6.iterator();
				ArrayList<String> title = new ArrayList<String>();
				while (iterTemp6.hasNext()) {
					Element element = (Element) iterTemp6.next();
					title.add(element.getText());
				}
				browseBean2.setTitle(title);
				List listTemp7 = document.selectNodes("/BrowseElements/element[@flag='"
						+ flag + "']/sql[@value='"+value+"']/output");
				Iterator iterTemp7 = listTemp7.iterator();
				ArrayList<String> output = new ArrayList<String>();
				while (iterTemp7.hasNext()) {
					Element element = (Element) iterTemp7.next();
					output.add(element.getText());
				}
				browseBean2.setOutput(output);
				map2.put(value, browseBean2);
			}
			browseBean1.setMap(map2);
			map1.put(flag, browseBean1);
		}
		/**
		 * Ango框架写法，全部使用iterator end
		 */
		
		ServletContext sc = sce.getServletContext();
		sc.setAttribute("adubBrowse", map1);
		logger.info("====================browse.xml已更新完毕====================");
		
	}

　　XML结构如下：

<?xml version="1.0" encoding="UTF-8"?>
<BrowseElements><!-- xmlns="http://www.w3school.com.cn" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.w3school.com.cn browse.xsd" -->
	<element flag="browse_code" pageSize="100" description="获取代码表">
	    <!-- sql语句必须保证正确 -->
		<sql value="select * from code where `table` = ?">
			<param>table</param>
			<title>代码编号</title>
			<title>代码内容</title>
			<title>权重1</title>
			<title>权重2</title>
			<title>备注</title>
			<output>id</output>
			<output>content</output>
			<output>weight1</output>
			<output>weight2</output>
			<output>note</output>
			<output>column</output>
			<output>table</output>
		</sql>
	</element>
	<element flag="browse_teacherInformation" pageSize="10" description="对教师进行查询">
	    <!-- sql语句必须保证正确 -->
		<sql value="select * from teacher_info where id like ? and name like ?  and college=? " description="浏览教师">
		 	<param>id</param>
		 	<param>name</param>
		 	<param drop="true1" session="true">college</param>
			<title>职工号</title>
			<title>教师姓名</title>
			<title>性别</title>	
			<title>所属单位</title>		
			<title>来校日期</title>
			<output>id</output>
			<output>name</output>
			<output>sex</output>
			<output>college</output>
			<output>arrive_time</output>
		</sql>
	</element>
	
	
	<element flag="browse_adminTeacherInformation" pageSize="10" description="对所有教师进行查询">
	    <!-- sql语句必须保证正确 -->
		<sql value="select * from teacher_info where id like ? and name like ?  and college like ? " description="浏览教师">
		 	<param>id</param>
		 	<param>name</param>
		 	<param>college</param>
		 	<title>序号</title>
			<title>职工号</title>
			<title>教师姓名</title>
			<title>性别</title>	
			<title>所属单位</title>		
			<title>来校日期</title>
			<output>id</output>
			<output>name</output>
			<output>sex</output>
			<output>college</output>
			<output>arrive_time</output>
		</sql>
	</element>

	<element flag="browse_teacherPassword" pageSize="10" description="对教师密码进行模糊查询">
	    <!-- sql语句必须保证正确 -->
		<sql value="select teacher_info.*,teacher_login.* from teacher_info ,teacher_login,admin_login where teacher_info.id=teacher_login.username and teacher_info.id  like ? and teacher_info.name like ? and admin_login.username=? and teacher_info.college=? ORDER BY id DESC" description="查询教师密码">
		 	<param>id</param>
		 	<param>name</param>
		 	<param session="true" drop="true">userName</param>
		 	<param session="true" drop="true">college</param>
			<title>教师姓名</title>
			<title>职工号</title>
			<title>性别</title>	
			<title>密码</title>
			<output>name</output>
			<output>id</output>
			<output>sex</output>
			<output>password</output>
		</sql>
	</element> 
	<element flag="browse_administrator_teacherPassword" pageSize="10" description="对所有教师密码进行模糊查询">
	    <!-- sql语句必须保证正确 -->
		<sql value="select teacher_info.*,teacher_login.* from teacher_info ,teacher_login,admin_login where teacher_info.college like ? and teacher_info.id=teacher_login.username and teacher_info.id  like ? and teacher_info.name like ? and admin_login.username=?  ORDER BY id DESC" description="查询所有教师密码">
		 	<param>college</param>
		 	<param>id</param>
		 	<param>name</param>
		 	<param session="true" drop="true">userName</param>
			<title>教师姓名</title>
			<title>职工号</title>
			<title>性别</title>	
			<title>密码</title>
			<title>所属单位</title>
			<output>name</output>
			<output>id</output>
			<output>sex</output>
			<output>password</output>
			<output>college</output>
		</sql>
	</element> 
<element flag="browseNews" pageSize="10" description="对信息进行模糊查询">
	    <!-- sql语句必须保证正确 -->
		<sql value="select * from news" description="信息查询">
			<param></param>
			<title>标题</title>
			<title>发布时间</title>
			<title>审核状态</title>
			<output>title</output>	
			<output>publishTime</output>
			<output>status</output>
			<output>id</output>
		</sql>
	</element>
	<element flag="getNews" pageSize="10" description="对信息进行模糊查询">
	    <!-- sql语句必须保证正确 -->
		<sql value="select * from news where status = 1 limit 5" description="信息查询">
			<output>id</output>
			<output>title</output>	
			<output>publishTime</output>
		</sql>
	</element>
</BrowseElements>
　　

　　各类javaBean属性如下: