XML建模

Dear 丶 2024-03-16 21:15 24阅读 0赞

**目录**

1.封装对象

2.xml建模

2.1.将xml的内容初始化到 描述出的模型对象中的过程称之为建模

2.2用到了23中设计模式中的工厂模式

--------------------

## 1.封装对象 ##

1.以面向对象的思想形容/封装对象，形容的是xml文件

列如：

<?xml version="1.0" encoding="UTF-8"?>
    	
    <config>
    	
    	<action path="/regAction" type="test.RegAction">
    	
    		<forward name="failed" path="/reg.jsp" redirect="false" />
    		<forward name="success" path="/login.jsp" redirect="true" />
    	</action>
    <action path="/regAction" type="test.RegAction">
    	
    		<forward name="add" path="/bookadd.jsp" redirect="false" />
             <forward name="del" path="/reg.jsp" redirect="false" />
              <forward name="list" path="/list.jsp" redirect="false" />
               <forward name="upd" path="/login.jsp" redirect="false" />
    	</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>

这是一个xml文件

package model;
    
    public class ForwardModel {
    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;
    }
    @Override
    public String toString() {
    	return "ForwardModel [name=" + name + ", path=" + path + ", redirect=" + redirect + "]";
    }
    
    }

这是封装了他的forwar标签

package model;
    
    import java.util.HashMap;
    import java.util.Map;
    
    public class ActionModel {
    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;
    }
    //将forward往ation放压载
    public void push(ForwardModel forwardModel) {
    	fmap.put(forwardModel.getName(),forwardModel);
    }
    //从action中取值
    public ForwardModel pop(String name) {
    	return fmap.get(name);
    	
    }
    
    }

这是封装了action标签

package model;
    
    import java.util.HashMap;
    import java.util.Map;
    
    import org.dom4j.DocumentException;
    
    public class ConfigModel {
    private Map<String , ActionModel> aMap=new HashMap<String, ActionModel>();
    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 DocumentException {
    	ConfigModel configModel =new ConfigModelFactory().build();
    	ActionModel actionModel = configModel.pop("/loginAction");
    	ForwardModel forwardModel=actionModel.pop("success");
    	System.out.println(forwardModel.getPath());
    }
    }

这是封装了他的config标签

以上便是xml的封装实体类

## 2.xml建模 ##

### 2.1.将xml的内容初始化到 描述出的模型对象中的过程称之为建模 ###

### 2.2用到了23中设计模式中的工厂模式 ###

如：

package 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;
    
    import com.sun.xml.internal.fastinfoset.tools.StAX2SAXReader;
    
    public class ConfigModelFactory {
    public static ConfigModel build() throws DocumentException {
    	ConfigModel configModel=new ConfigModel();
    	InputStream in = ConfigModelFactory.class.getResourceAsStream("mvc.xml");
    	SAXReader sr=new SAXReader();
    	Document doc = sr.read(in);
    	System.out.println(doc.asXML());
    	List<Element> actionEles=doc.selectNodes("/config/action");
     for (Element actionEle : actionEles) {
    	//System.out.println(actionEle.asXML());
    	ActionModel actionModel = new ActionModel();
    	actionModel.setPath(actionEle.attributeValue("path"));
    	actionModel.setType(actionEle.attributeValue("type"));
    	List<Element> forwardEles=actionEle.selectNodes("forward");
    	for (Element element : forwardEles) {
    		
    	 ForwardModel forwardModel = new ForwardModel();
    	 forwardModel.setName(element.attributeValue("name"));
    	 forwardModel.setPath(element.attributeValue("path"));
    	 forwardModel.setRedirect(!"false".equals(element.attribute("false")));
    	System.out.println(element.getPath());
    	 actionModel.push(forwardModel);
    	}
    	configModel.push(actionModel);
    }
    	
    	return configModel;
    	
    }
    public static void main(String[] args) throws DocumentException {
    	ConfigModelFactory.build();
    }
    }

以上便是xml建模的全过程

当我们运行这段代码时：

public static void main(String[] args) throws DocumentException {
    	ConfigModel configModel =new ConfigModelFactory().build();
    	ActionModel actionModel = configModel.pop("/loginAction");
    	ForwardModel forwardModel=actionModel.pop("success");
    	System.out.println(forwardModel.getPath());
    }

结果为：

![c8fae1cda27b4dac943ac25c5b2fccf7.png][]

以上便是建模全内容

[c8fae1cda27b4dac943ac25c5b2fccf7.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/15/1cb54a40d986490a8b4a540dd733cf64.png