Xml解析作业与Xml建模andXml建模作业

作业：config.xml解析

1、获取所有action中的type的值

public static void main(String[] args) throws Exception {

        InputStream in=XmlDemo.class.getResourceAsStream("config.xml");

        SAXReader sax= new SAXReader();

        Document doc=sax.read(in);

                            //获取所有action中的type的值

        List<Element> stuEles= doc.selectNodes("/config/action");

        for (Element stuEle : stuEles) {

            String type=stuEle.attributeValue("type");

            System.out.println(type);

        }

2、获取第二个action中的type的值

List<Element> stuEles= doc.selectNodes("/config/action");

        for (Element stuEle : stuEles) {

            if("/loginAction".equals(stuEle.attributeValue("path"))) {

                String type=stuEle.attributeValue("type");

                System.out.println(type);

            }

        }

3、获取第二个action的所有forward的path

List<Element> stuEles= doc.selectNodes("/config/action");

        for (Element stuEle : stuEles) {

            if("/loginAction".equals(stuEle.attributeValue("path"))) {

                List<Element> ford=(List<Element>) stuEle.selectNodes("forward");

                for (Element element : ford) {

                    String path=element.attributeValue("path");

                    System.out.println(path);

                }

            }

        }

4、获取第二个action的第二个forward的path

List<Element> stuEles= doc.selectNodes("/config/action");

        for (Element stuEle : stuEles) {

            if("/loginAction".equals(stuEle.attributeValue("path"))) {

                List<Element> ford=(List<Element>) stuEle.selectNodes("forward");

                for (Element element : ford) {

                    if("success".equals(element.attributeValue("name"))) {

                    String path=element.attributeValue("path");

                    System.out.println(path);

                    }

                }

            }

        }

Xml建模

1.什么是Xml建模

将XML配置文件中的元素，属性，文本信息转换成对象的过程叫XML建模

2.XML建模

1.根据XML配置文件元素节点创建元素，节点，实体类
ConfigModel ActionModel ForwardModel

2.利用dom4j+xpath技术实现XML建模ConfigModelFactory

2. XML建模类
ConfigModel
ActionModel
ForwardModel
ConfigModelFactory

建模的思路

1、分析需要被建模的文件中有那几个对象
2、每个对象拥有的行为以及属性
3、定义对象从小到大（从里到外）
4、通过23种的设计模式中的工厂模式，解析xml生产出指定对象
好处：
提高代码的复用性

4.利用工程模式+dom4j+xpath解析XML配置文件

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>

3.使用Map集合存放子节点元素，其中Key为子节点的唯一属性，Value为整个子节点对象。

定义对象实体类

package com.zking.model;

public class FowardModel {

/*

 * 添加节点属性

 */

    private String name;

    private String path;

    private Boolean reairect;

    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 getReairect() {

        return reairect;

    }

    public void setReairect(Boolean reairect) {

        this.reairect = reairect;

    }

}

行为及属性

package com.zking.model;

import java.util.HashMap;

import java.util.Map;

public class ActionModel {

    private String path;

    private String type;

    private Map<String, FowardModel> 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;

    }

    //存放到Map集合

    public void push(FowardModel fowardModel) {

        fmap.put(fowardModel.getName(), fowardModel);

    }

    //获取 返回FowardModel

    public FowardModel pop(String name) {

    return    fmap.get(name);

    }

}

package com.zking.model;

import java.util.HashMap;

import java.util.Map;

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);

    }

}

4.利用工程模式+dom4j+xpath解析XML配置文件

导入dom4j包

package com.zking.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设计模式之一:工厂模式   用来将资源文件生产指定的实体类

 * 处理Java中所遇到的一些特定的一些问题

 *

 * 好处：

 *     提高代码复用性

 */

public class ConfigModelFactory {

    public static ConfigModel build() throws DocumentException {

        return ConfigModel("config.xml");

    }

/*

 * 生产出有类容的实体类ConfigModel

 */

    private static ConfigModel ConfigModel(String xmlPath) throws DocumentException {

        // TODO Auto-generated method stub

        // 创建ConfigModel对象

        ConfigModel    configModel=new ConfigModel();

        ActionModel actionModel=null;

        FowardModel fowardModel=null;

        InputStream in = ConfigModelFactory.class.getResourceAsStream(xmlPath);

        SAXReader saxRead=new SAXReader();

        Document doc = saxRead.read(in);

        List<Element> actionEles = doc.selectNodes("/config/action");

        for (Element actionEle : actionEles) {

            actionModel=new ActionModel();

            //给actionModel对象填充Xml中的action标签的类容

            actionModel.setPath(actionEle.attributeValue("path"));

            actionModel.setType(actionEle.attributeValue("type"));

            List<Element> fowardEles = actionEle.selectNodes("foward");

            for (Element fowardEle : fowardEles) {

                fowardModel=new FowardModel();

                //给fowardModel对象填充Xml中的foward标签的类容

                fowardModel.setName(fowardEle.attributeValue("name"));

                fowardModel.setPath(fowardEle.attributeValue("path"));

                fowardModel.setReairect(!"false".equals(fowardEle.attributeValue("redirect")));

                //<forward name="failed" path="/login.jsp" redirect="false" />

//               redirect默认true 重定向

                //只有false才是转发

                //fowardEle.attributeValue("redirect")拿到是xml中你所填的值

                //不填  重定向  !"false".equals(fowardEle.attributeValue("redirect")) false

                //填 true 重定向   !"false".equals(fowardEle.attributeValue("redirect")) false

                //填false 转发   !"false".equals(fowardEle.attributeValue("redirect")) true

                actionModel.push(fowardModel);

            }

            configModel.push(actionModel);

        }

        return configModel;

    }

    public static void main(String[] args) throws DocumentException {

        ConfigModel configModel=ConfigModelFactory.build();

        ActionModel actionModel= configModel.pop("/loginAction");

        System.out.println(actionModel.getType());

    }

}

控制台输入结果：

Xml建模作业

ServletClassModel

package com.zking.xml.webModel;

public class ServletClassModel {

    private String context;

    public String getContext() {

        return context;

    }

    public void setContext(String context) {

        this.context = context;

    }

}

ServletMappingModel

package com.zking.xml.webModel;

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

package com.zking.xml.webModel;

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

package com.zking.xml.webModel;

public class ServletNameModel {

    private String context;

    public String getContext() {

        return context;

    }

    public void setContext(String context) {

        this.context = context;

    }

}

UrlPatternModel

package com.zking.xml.webModel;

public class UrlPatternModel {

    private String context;

    public String getContext() {

        return context;

    }

    public void setContext(String context) {

        this.context = context;

    }

}

WebAppModel

package com.zking.xml.webModel;

import java.util.ArrayList;

import java.util.List;

public class WebAppModel {

    private List<ServletModel> servletModels = new ArrayList<>();

    private List<ServletMappingModel> servletMappingModels = new ArrayList<>();

    public void pushServletModel(ServletModel servletModel) {

        servletModels.add(servletModel);

    }

    public List<ServletModel> getServletModels() {

        return servletModels;

    }

    public void pushServletMappingModel(ServletMappingModel servletMappingModel) {

        servletMappingModels.add(servletMappingModel);

    }

    public List<ServletMappingModel> getServletMappingModels() {

        return servletMappingModels;

    }

}

WebAppModelFactory

package com.zking.xml.webModel;

import java.io.InputStream;

import java.util.List;

import org.dom4j.Document;

import org.dom4j.DocumentException;

import org.dom4j.Element;

import org.dom4j.Node;

import org.dom4j.io.SAXReader;

public class WebAppModelFactory {

    public static WebAppModel buildWebAppModel() {

        String xmlPath = "/web.xml";

        return buildWebAppModel(xmlPath);

    }

    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);

            List<Element> servletEles = doc.selectNodes("/web-app/servlet");

            for (Element servletEle : servletEles) {

                ServletModel servletModel = new ServletModel();

                Element servletNameEle = (Element) servletEle.selectSingleNode("servlet-name");

                Element servletClassEle = (Element) servletEle.selectSingleNode("servlet-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);

            }

            List<Element> servletMappingEles = doc.selectNodes("/web-app/servlet-mapping");

            for (Element servletMappingEle : servletMappingEles) {

                ServletMappingModel servletMappingModel = new ServletMappingModel();

                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) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

        return webAppModel;

    }

    public static String getServletClassByUrl(WebAppModel webAppModel, String url) {

        String servletClass = "";

        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();

                }

            }

        }

        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);

    }

}

2019-06-1119:22:01

巴特西

Xml解析作业与Xml建模andXml建模作业

2.XML建模

4.利用工程模式+dom4j+xpath解析XML配置文件

3.使用Map集合存放子节点元素，其中Key为子节点的唯一属性，Value为整个子节点对象。

4.利用工程模式+dom4j+xpath解析XML配置文件

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