概述
目录：
一.XML建模
1.什么是建模？
2.建模思路
3.建模步骤
核心思想
二.工厂模式
一.XML建模：
什么是建模？
核心思想：以面向对象的思想去操作xml文件
建模思路：
1.要分析需要被建模的文件中有哪几个对象
2.每个对象拥有的行为以及属性
3.定义一个从里到外的对象
4.通过23种设计模式中的工厂模式，解析xml生产指定对象
建模步骤：
1.以面向对象的编程思想，描述xml资源文件
2.将xml文件中的内容封装到model实体对象中
作用：减少重复代码，将代码反复使用
建模方式：由内到外
config.xml文件：
<?xml version="1.0" encoding="UTF-8"?>
<config>
<!-- action标签:可以饱含0~N个forward标签 path:以/开头的字符串,并且值必须唯一 非空 type:字符串,非空 -->
<action path="/regAction" type="test.RegAction">
<!-- forward标签:没有子标签; name:字符串,同一action标签下的forward标签name值不能相同 ; path:以/开头的字符串
redirect:只能是false|true,允许空,默认值为false -->
<forward name="failed" path="/reg.jsp" redirect="false" />
<forward name="success" path="/login.jsp" redirect="true" />
</action>
<action path="/loginAction" type="test.LoginAction">
<forward name="failed" path="/login.jsp" redirect="false" />
<forward name="success" path="/main.jsp" redirect="true" />
</action>
</config>第一个实体类：ForwardModel（ 由里到外）
package com.ljj.model;
/**
* 对应forward标签
* @author Administrator 刘俊杰
*下午6:27:10
*/
public class ForwardModel {
//<forward name="failed" path="/login.jsp" redirect="false" />
private String name;
private String path;
private boolean readirect;
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 isReadirect() {
return readirect;
}
public void setReadirect(boolean readirect) {
this.readirect = readirect;
}
}
第二个实体类：ActionModel
定义了两个方法：一个是压栈（就是将数据加入相对应的对象中）
第二个是弹栈（弹栈就相当于获取值的方法）
package com.ljj.model;
import java.util.HashMap;
import java.util.Map;
/**
* 对应action标签
* @author Administrator 刘俊杰
*下午6:25:56
*/
public class ActionModel {
// <action path="/loginAction" type="test.LoginAction">
private String path;
private String type;
private Map<String, ForwardModel> fMap=new HashMap<String, ForwardModel>();
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;
}
//两个行为，增加forwardModel对象，查找forwardModel对象
public void push(ForwardModel forwardModel ) {
fMap.put(forwardModel.getName(), forwardModel);
}
public ForwardModel pop(String name) {
return fMap.get(name);
}
}
第三个实体类：ConfigModel
package com.ljj.model;
import java.util.HashMap;
import java.util.Map;
/**
* 根标签对应的对象
* @author Administrator 刘俊杰
*下午6:24:17
*/
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);
}
}
二.工厂模式：
工厂类：ConfigModelFactory
23种设计模式之工厂模式
sessionfactory
ConfigModelFactory生产出来的configmodel对象
生产出来的 ConfigModel对象就包含了config.xml中的配置内容
此地生产configmodel有配置信息？
1、解析config.xml中的配置信息
2、将对应的配置信息分别加载进行不同的模型信息
代码展示：
第一种方法：
package com.ljj.model;
import java.io.InputStream;
import java.util.List;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
/**
* 23种设计模式之工厂模式
* sessionfactory
* ConfigModelFactory就是用来生成configmodel对象的
* 生产出来的ConfigModel对象就包含了config.xml中的配置内容
*
* 此地生产configmodel有配置信息？
* 1.解析config.xml中的配置信息
* 2.将对应的配置信息分别加载进不同的模型对象中
* @author Administrator 刘俊杰
*下午7:11:48
*/
public class ConfigModelFactory {
public static ConfigModel bulid(String path) throws Exception {
InputStream in = ConfigModelFactory.class.getResourceAsStream(path);
SAXReader sr = new SAXReader();
Document doc = sr.read(in);
List<Element> actionEles = doc.selectNodes("/config/action");
ConfigModel configModel = new ConfigModel();
for (Element actionEle : actionEles) {
ActionModel actionModel = new ActionModel();
actionModel.setPath(actionEle.attributeValue("path"));
actionModel.setType(actionEle.attributeValue("type"));
// 将forwardmodel赋值并且添加到Actionmodel中
List<Element> forwardEles = actionEle.selectNodes("forward");
for (Element element : forwardEles) {
ForwardModel forwardModel = new ForwardModel();
forwardModel.setName(element.attributeValue("name"));
forwardModel.setPath(element.attributeValue("path"));
// redirect:只能是true|false,允许空，默认为false
forwardModel.setReadirect("true".equals(element.attributeValue("readirec")));
actionModel.push(forwardModel);
}
configModel.push(actionModel);
}
return configModel;
}
public static ConfigModel bulid() throws Exception {
String defaultpath="/config.xml";
return bulid(defaultpath);
}
}
第二种方法：
package com.ljj.model;
import java.io.InputStream;
import java.util.List;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
/**
* 23种设计模式之工厂模式
* sessionfactory
* ConfigModelFactory就是用来生成configmodel对象的
* 生产出来的ConfigModel对象就包含了config.xml中的配置内容
*
* 此地生产configmodel有配置信息？
* 1.解析config.xml中的配置信息
* 2.将对应的配置信息分别加载进不同的模型对象中
* @author Administrator 刘俊杰
*下午7:11:48
*/
public class ConfigModelFactory {
public static ConfigModel bulid() throws Exception {
String defaultPath="/config.xml";
InputStream in = ConfigModelFactory.class.getResourceAsStream(defaultPath);
SAXReader sr = new SAXReader();
Document doc = sr.read(in);
List<Element> actionEles = doc.selectNodes("/config/action");
ConfigModel configModel = new ConfigModel();
for (Element actionEle : actionEles) {
ActionModel actionModel = new ActionModel();
actionModel.setPath(actionEle.attributeValue("path"));
actionModel.setType(actionEle.attributeValue("type"));
// 将forwardmodel赋值并且添加到Actionmodel中
List<Element> forwardEles = actionEle.selectNodes("forwaard");
for (Element element : forwardEles) {
ForwardModel forwardModel = new ForwardModel();
forwardModel.setName(element.attributeValue("name"));
forwardModel.setPath(element.attributeValue("path"));
// redirect:只能是true|false,允许空，默认为false
forwardModel.setReadirect("true".equals(element.attributeValue("readirec")));
actionModel.push(forwardModel);
}
configModel.push(actionModel);
}
return configModel;
}
}
执行测试代码：
package com.ljj.model;
public class Demo1 {
public static void main(String[] args) throws Exception {
// ConfigModel configModel = new ConfigModel();
ConfigModel configModel = ConfigModelFactory.bulid();
ActionModel actionModel = configModel.pop("/loginAction");
System.out.println(actionModel.getType());
ForwardModel forwardModel = actionModel.pop("success");
System.out.println(forwardModel.getPath());
}
}
运行结果：
扩展案例：对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-mapping>
<servlet-name>jrebelServlet</servlet-name>
<url-pattern>/jrebelServlet</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>jrebelServlet2</servlet-name>
<servlet-class>com.zking.xml.JrebelServlet2</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>jrebelServlet2</servlet-name>
<url-pattern>/jrebelServlet2</url-pattern>
<url-pattern>/jrebelServlet3</url-pattern>
</servlet-mapping>
</web-app>ForwardModel.java
package com.ljj.model;
/**
* 对应forward标签
* @author Administrator 刘俊杰
*下午6:27:10
*/
public class ForwardModel {
//<forward name="failed" path="/login.jsp" redirect="false" />
private String name;
private String path;
private boolean readirect;
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 isReadirect() {
return readirect;
}
public void setReadirect(boolean readirect) {
this.readirect = readirect;
}
}
ServletClassModel.java
package com.ljj.model;
public class ServletClassModel {
private String context;
public String getContext() {
return context;
}
public void setContext(String context) {
this.context = context;
}
}
ServeltMapping.java
package com.ljj.model;
import java.util.ArrayList;
import java.util.List;
public class ServletMappingModel {
private ServletNameModel servletNameModel;
private List<UrlPatternModel> urlPatternModels = new ArrayList<>();
public ServletNameModel getServletNameModel() {
return servletNameModel;
}
public void setServletNameModel(ServletNameModel servletNameModel) {
this.servletNameModel = servletNameModel;
}
public void pushUrlPatternModel(UrlPatternModel urlPatternModel) {
urlPatternModels.add(urlPatternModel);
}
public List<UrlPatternModel> getUrlPatternModels() {
return urlPatternModels;
}
}
ServletModel.java
package com.ljj.model;
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;
}
}
ServletNameModel.java
package com.ljj.model;
public class ServletNameModel {
private String context;
public String getContext() {
return context;
}
public void setContext(String context) {
this.context=context;
}
}
UrlPatternModel.java
package com.ljj.model;
public class UrlPatternModel {
private String context;
public String getContext() {
return context;
}
public void setContext(String context) {
this.context = context;
}
}
WebAppModel.java
package com.ljj.model;
public class UrlPatternModel {
private String context;
public String getContext() {
return context;
}
public void setContext(String context) {
this.context = context;
}
}
WebAppModelFactory.java
package com.ljj.model;
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 in = WebAppModelFactory.class.getResourceAsStream(xmlPath);
SAXReader saxReader = new SAXReader();
WebAppModel webAppModel = new WebAppModel();
try {
Document doc = saxReader.read(in);
/**
* 将servlet的标签内容填充进WebApp
*/
List<Element> servletEles = doc.selectNodes("/web-app/servlet");
for (Element servletEle : servletEles) {
ServletModel servletModel = new ServletModel();
/**
* 给servlet填充xml的内容
*/
Element servletNameEle =(Element) servletEle.selectSingleNode("servlet-name");
Element servletClassEle = (Element) servletEle.selectSingleNode("select-class");
ServletNameModel servletNameModel =new ServletNameModel();
ServletClassModel servletClassModel = new ServletClassModel();
servletNameModel.setContext(servletNameEle.getText());
servletClassModel.setContext(servletClassEle.getText());
servletModel.setServletNameModel(servletNameModel);
servletModel.setServletClassModel(servletClassModel);
webAppModel.pushServletModel(servletModel);
}
/**
* 将servlet-mapping的标签内容填充进WebApp
*/
List<Element> servletMappingEles = doc.selectNodes("/web-app/servlet-mapping");
for (Element servletMappingEle : servletMappingEles) {
ServletMappingModel servletMappingModel = new ServletMappingModel();
/**
* 给ServletMappingModel填充xml的内容
*/
Element servletNameEle = (Element) servletMappingEle.selectSingleNode("servlet-name");
ServletNameModel servletNameModel = new ServletNameModel();
servletNameModel.setContext(servletNameEle.getText());
servletMappingModel.setServletNameModel(servletNameModel);
List<Element> urlPatternEles = servletMappingEle.selectNodes("url-pattern");
for (Element urlPatternEle : urlPatternEles) {
UrlPatternModel urlPatternModel = new UrlPatternModel();
urlPatternModel.setContext(urlPatternEle.getText());
servletMappingModel.pushUrlPatternModel(urlPatternModel);
}
webAppModel.pushServletMappingModel(servletMappingModel);
}
} catch (Exception e) {
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> servletMappingModels = webAppModel.getServletMappingModels();
for (ServletMappingModel servletMappingModel : servletMappingModels) {
List<UrlPatternModel> urlPatternModels = servletMappingModel.getUrlPatternModels();
for (UrlPatternModel urlPatternModel : urlPatternModels) {
if(url.equals(urlPatternModel.getContext())) {
ServletNameModel servletNameModel = servletMappingModel.getServletNameModel();
servletName = servletNameModel.getContext();
}
}
}
/*
* 找到servlet-name对应的后台处理类
*/
List<ServletModel> servletModels = webAppModel.getServletModels();
for (ServletModel servletModel : servletModels) {
ServletNameModel servletNameModel = servletModel.getServletNameModel();
if(servletName.equals(servletNameModel.getContext())) {
ServletClassModel servletClassModel = servletModel.getServletClassModel();
servletClass = servletClassModel.getContext();
}
}
return servletClass;
}
public static void main(String[] args) {
WebAppModel webAppModel = WebAppModelFactory.buildWebAppModel();
String res = getServletClassByUrl(webAppModel, "/jrebelServlet");
String res2 = getServletClassByUrl(webAppModel, "/jrebelServlet2");
String res3 = getServletClassByUrl(webAppModel, "/jrebelServlet3");
System.out.println(res);
System.out.println(res2);
System.out.println(res3);
}
}
测试结果：
最后
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