XML建模

最新推荐文章于 2022-02-14 11:48:45 发布

大佬员阿乐

最新推荐文章于 2022-02-14 11:48:45 发布

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文章标签： j2ee

本文链接：https://blog.youkuaiyun.com/m0_60390944/article/details/119255352

版权

XML建模

1.将原有的config.xml进行解析

2.对应标签的内容，将其封装赋值给相应的对象（注意事项，从内向外建模）

forward标签赋值给ForwardModel对象

利用对象进行标签赋值，根据标签所需的属性不同而给予不同的值

package com.xly.a;

public class ForwardModel {
//	<forward name="failed" path="/login.jsp" redirect="false" />
	private String name;
	private String path;
	private boolean redirect;
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getPath() {
		return path;
	}
	public void setPath(String path) {
		this.path = path;
	}
	public boolean isRedirect() {
		return redirect;
	}
	public void setRedirect(boolean redirect) {
		this.redirect = redirect;
	}
}

action标签赋值给ActionModel对象

对其内部对象进行压栈和弹栈

代码块

package com.xly.a;

import java.util.HashMap;
import java.util.Map;

public class ActionModel {
//	<action path="/loginAction" type="test.LoginAction">
	private String path;
	private String type;
	private Map<String, ForwardModel> fmap=new HashMap<>();
	public String getPath() {
		return path;
	}
	public void setPath(String path) {
		this.path = path;
	}
	public String getType() {
		return type;
	}
	public void setType(String type) {
		this.type = type;
	}
//	压栈
	public void push(ForwardModel ForwardModel) {
		fmap.put(ForwardModel.getName(), ForwardModel);
	}
//	弹栈
	public ForwardModel pop(String name) {
		return fmap.get(name);
	}

}

config标签赋值给ConfigModel对象

最大的对象压栈弹栈完之后可进行查询其内部数据

代码块

package com.xly.a;

import java.util.HashMap;
import java.util.Map;
/**
 * ConfigModel
 * @author zjjt
 *
 */
public class ConfigModel {
	private Map<String, ActionModel> amap=new HashMap<>();
	public void push(ActionModel actionModel) {
		amap.put(actionModel.getPath(), actionModel);
		
	}
	public ActionModel pop(String path) {
		return amap.get(path);
	}
	public static void main(String[] args) throws Exception {
		ConfigModel cm=ConfigModelFactory.build();
		ActionModel am = cm.pop("/loginAction");
		System.out.println(am.getType());
	}

}

其输出的结果

工厂模式

1.新建一个对象方法找到相关的xml文档类

2.找到工厂类自定义数据进行输入

3.找到相对应元素进行遍历

4.将xml文件解析得来的path值赋值给actionmodel对象中的path属性

5.Redirect只有在配置文件中赋值false的时候代表转发，其他代表重定向

代码显示

public class ConfigModelFactory {
//	新建一个类找到相关的xml文档类
	public static ConfigModel build() throws Exception {
		return build("config.xml");
	}
	public static ConfigModel build(String resourcepath) throws Exception {
		InputStream is = ConfigModelFactory.class.getResourceAsStream(resourcepath);
		SAXReader saxreader=new SAXReader();
		Document doc = saxreader.read(is);
		ConfigModel con=new ConfigModel();
//		找到相对应元素进行遍历
		List<Element> alist=doc.selectNodes("/config/action");
		for (Element i : alist) {
			ActionModel am=new ActionModel();
//			将xml文件解析得来的path值赋值给actionmodel对象中的path属性
			am.setPath(i.attributeValue("path"));
			am.setType(i.attributeValue("type"));
			List<Element> flist=i.selectNodes("forword");
			for (Element fi : flist) {
				ForwardModel fm=new ForwardModel();
				fm.setName(fi.attributeValue("name"));
				fm.setPath(fi.attributeValue("path"));
//				Redirect只有在配置文件中赋值false的时候代表转发，其他代表重定向
				fm.setRedirect(!"false".equals(fi.attributeValue("redirect")));
				am.push(fm);
			}
			con.push(am);
		}
		return con;
	}

}

课后练习

题目web.xml进行建模

<?xml version="1.0" encoding="UTF-8"?>
<web-app>
  <servlet>
  	<servlet-name>jrebelServlet</servlet-name>
  	<servlet-class>com.zking.xml.JrebelServlet</servlet-class>
  </servlet>
  
  <servlet>
  	<servlet-name>jrebelServlet2</servlet-name>
  	<servlet-class>com.zking.xml.JrebelServlet2</servlet-class>
  </servlet>
  
  <servlet-mapping>
  	<servlet-name>jrebelServlet</servlet-name>
  	<url-pattern>/jrebelServlet</url-pattern>
  </servlet-mapping>
  
  <servlet-mapping>
  	<servlet-name>jrebelServlet2</servlet-name>
  	<url-pattern>/jrebelServlet2</url-pattern>
  	<url-pattern>/jrebelServlet3</url-pattern>
  </servlet-mapping>
</web-app>

对web.xml标签进行建模（从内向外一次进行建模）

servlet-name

package com.xly.b;

public class ServletNameModel {
	private String context;

	public String getContext() {
		return context;
	}

	public void setContext(String context) {
		this.context = context;
	}

}

servlet-class

package com.xly.b;

public class ServletClassModel {
	private String context;

	public String getContext() {
		return context;
	}

	public void setContext(String context) {
		this.context = context;
	}

}

url-pattern

package com.xly.b;

public class UrlPatternModel {
	private String context;

	public String getContext() {
		return context;
	}

	public void setContext(String context) {
		this.context = context;
	}

}

servlet

package com.xly.b;

public class ServletModel {
	private ServletNameModel servletNameModel;
	private ServletClassModel servletClassModel;

	public ServletNameModel getServletNameModel() {
		return servletNameModel;
	}

	public void setServletNameModel(ServletNameModel servletNameModel) {
		this.servletNameModel = servletNameModel;
	}

	public ServletClassModel getServletClassModel() {
		return servletClassModel;
	}

	public void setServletClassModel(ServletClassModel servletClassModel) {
		this.servletClassModel = servletClassModel;
	}

}

servlet-mapping

package com.xly.b;

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

public class ServletMappingModel {
	private ServletNameModel servletNameModel;
	private List<UrlPatternModel> ulist = new ArrayList<>();
	public ServletNameModel getServletNameModel() {
		return servletNameModel;
	}
	public void setServletNameModel(ServletNameModel servletNameModel) {
		this.servletNameModel = servletNameModel;
	}
	
	public void pushUrlPatternModel(UrlPatternModel urlPatternModel) {
		ulist.add(urlPatternModel);
	}
	
	public List<UrlPatternModel> getUrlPatternModels() {
		return ulist;
	}

}

web-app

package com.xly.b;

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

public class WebappModel {
	private List<ServletModel> slist = new ArrayList<>();
	private List<ServletMappingModel> smlist = new ArrayList<>();

	public void pushServletModel(ServletModel servletModel) {
		slist.add(servletModel);
	}
	
	public List<ServletModel> getServletModels() {
		return slist;
	}
	
	public void pushServletMappingModel(ServletMappingModel servletMappingModel) {
		smlist.add(servletMappingModel);
	}
	
	public List<ServletMappingModel> getServletMappingModels() {
		return smlist;
	}

}

进行工厂模式

package com.xly.b;

import java.io.InputStream;
import java.util.List;

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

public class WebappModelFactory {
	public static WebappModel buildWebAppModel() {
		String xmlPath = "/web.xml";
		return buildWebAppModel(xmlPath);
	}

	/**
	 * 建模
	 * 
	 * @param xmlPath
	 * @return
	 */
	public static WebappModel buildWebAppModel(String xmlPath) {
		InputStream is = WebappModelFactory.class.getResourceAsStream(xmlPath);
		SAXReader saxred = new SAXReader();
		WebappModel webAppModel = new WebappModel();
		try {
			Document doc = saxred.read(is);
			/*
			 * 将servlet的标签内容填充进WebApp
			 */
			List<Element> list = doc.selectNodes("/web-app/servlet");
			for (Element i : list) {
				ServletModel sm = new ServletModel();

				/*
				 * 给ServletModel填充xml的内容
				 */
				Element sn = (Element) i.selectSingleNode("servlet-name");
				Element sc = (Element) i.selectSingleNode("servlet-class");
				ServletNameModel snm = new ServletNameModel();
				ServletClassModel scm = new ServletClassModel();
				snm.setContext(snm.getContext());
				scm.setContext(scm.getContext());
				
				sm.setServletNameModel(snm);
				sm.setServletClassModel(scm);

				webAppModel.pushServletModel(sm);
			}

			/*
			 * 将servlet-mapping的标签内容填充进WebApp
			 */
			List<Element> smg = doc.selectNodes("/web-app/servlet-mapping");
			for (Element ism : smg) {
				ServletMappingModel smm = new ServletMappingModel();

				/*
				 * 给ServletMappingModel填充xml的内容
				 */
				Element sn = (Element) ism.selectSingleNode("servlet-name");
				ServletNameModel snm = new ServletNameModel();
				snm.setContext(sn.getText());
				smm.setServletNameModel(snm);
				
				List<Element> up = ism.selectNodes("url-pattern");
				for (Element ui : up) {
					UrlPatternModel urlPatternModel = new UrlPatternModel();
					urlPatternModel.setContext(ui.getText());
					smm.pushUrlPatternModel(urlPatternModel);
				}

				webAppModel.pushServletMappingModel(smm);
			}

		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return webAppModel;
	}
	
	/**
	 * 通过浏览器输入的网址自动找到对应的后台处理类
	 * @param webAppModel	建模后的实体类
	 * @param url	浏览器访问的网址
	 * @return
	 */
	public static String getServletClassByUrl(WebappModel webAppModel, String url) {
		String servletClass = "";
		/*
		 * 找到浏览器网址对应的servlet-name
		 */
		String servletName = "";
		List<ServletMappingModel> smm = webAppModel.getServletMappingModels();
		for (ServletMappingModel smi : smm) {
			List<UrlPatternModel> upm = smi.getUrlPatternModels();
			for (UrlPatternModel ui : upm) {
				if(url.equals(ui.getContext())) {
					ServletNameModel snm = smi.getServletNameModel();
					servletName = snm.getContext();
				}
			}
		}
		
		/*
		 * 找到servlet-name对应的后台处理类
		 */
		List<ServletModel> list1 = webAppModel.getServletModels();
		for (ServletModel sm : list1) {
			ServletNameModel snm = sm.getServletNameModel();
			if(servletName.equals(snm.getContext())) {
				ServletClassModel scm = sm.getServletClassModel();
				servletClass = scm.getContext();
			}
		}
		return servletClass;
	}
	
	public static void main(String[] args) {
		WebappModel wam = WebappModelFactory.buildWebAppModel();
		String req = getServletClassByUrl(wam, "/jrebelServlet");
		String req1 = getServletClassByUrl(wam, "/jrebelServlet2");
		String req2 = getServletClassByUrl(wam, "/jrebelServlet3");
		System.out.println(req);
		System.out.println(req1);
		System.out.println(req2);
		
	}

}