目录

一、什么叫XML建模

二、XML建模

三、案例 

一、什么叫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做XML建模

二、XML建模

（1）根据XML配置文件元素节点创建元素节点实体类
（2）利用dom4j+xpath技术实现XML建模

三、案例 

需要的jar包：dom4j-1.6.1.jar  

                      jaxen-1.1-beta-6.jar

config.xml

	
	
	
	
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ForwardModel.java

package com.zking.entity;

import java.io.Serializable;

public class ForwardModel implements Serializable{
	
	private static final long serialVersionUID = 3557052377484390295L;
	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 getRedirect() {
		return redirect;
	}
	public void setRedirect(Boolean redirect) {
		this.redirect = redirect;
	}
	public ForwardModel() {
		// TODO Auto-generated constructor stub
	}
	public ForwardModel(String name, String path, Boolean redirect) {
		super();
		this.name = name;
		this.path = path;
		this.redirect = redirect;
	}
	@Override
	public String toString() {
		return "ForwardModel [name=" + name + ", path=" + path + ", redirect=" + redirect + "]";
	}
	
}

ActionModel.java

package com.zking.entity;

import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;

public class ActionModel implements Serializable{
	
	private static final long serialVersionUID = -7058655227463933636L;
	private String path;
	private String type;
	
	private Map forwardMap = 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;
	}
	
	public ActionModel() {
		// TODO Auto-generated constructor stub
	}
	public ActionModel(String path, String type) {
		super();
		this.path = path;
		this.type = type;
	}
	
	public void push(ForwardModel fm) {
		this.forwardMap.put(fm.getName(), fm);
	}
	
	public ForwardModel getFM(String name) {
		return this.forwardMap.get(name);
	}
	@Override
	public String toString() {
		return "ActionModel [path=" + path + ", type=" + type + ", forwardMap=" + forwardMap + "]";
	}
	
}

ConfigModel.java

package com.zking.entity;

import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;

public class ConfigModel implements Serializable{
	
	private static final long serialVersionUID = 7753991598150098506L;
	
	private Map actionMap = new HashMap();

	public Map getActionMap() {
		return actionMap;
	}

	public void setActionMap(Map actionMap) {
		this.actionMap = actionMap;
	}
	
	public ConfigModel() {
		// TODO Auto-generated constructor stub
	}

	public ConfigModel(Map actionMap) {
		this.actionMap = actionMap;
	}
	
	public void push(ActionModel am) {
		this.actionMap.put(am.getPath(), am);
	}
	
	public ActionModel getAM(String path) {
		return this.actionMap.get(path);
	}
}

ConfigModelFactory.java

package com.zking.util;

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

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

import com.zking.entity.ActionModel;
import com.zking.entity.ConfigModel;
import com.zking.entity.ForwardModel;

public class ConfigModelFactory {
	
	private static final String DEFAULT_PATH = "/config.xml";
	
	private ConfigModelFactory() {
		
	}
	
	public static ConfigModel createConfigModel(String path) {
		InputStream is = ConfigModelFactory.class.getResourceAsStream(path);
		
		SAXReader sr = new SAXReader();
		
		ActionModel am = null;
		ForwardModel fm = null;
		ConfigModel cm = new ConfigModel();
		
		try {
			Document doc = sr.read(is);
			List actionNode = doc.selectNodes("/config/action");
			for (Node acNode : actionNode) {
				Element acEl = (Element)acNode;
				am = new ActionModel(acEl.attributeValue("path"), acEl.attributeValue("type"));

				List forwardNode = acNode.selectNodes("forward");
				for (Node forNode : forwardNode) {
					Element forEl = (Element)forNode;
					fm = new ForwardModel(
							forEl.attributeValue("name"), 
							forEl.attributeValue("path"), 
							Boolean.parseBoolean(forEl.attributeValue("redirect"))
					);
					am.push(fm);
				}
				cm.push(am);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return cm;
	}
	
	public static ConfigModel createConfigModel() {
		return createConfigModel(DEFAULT_PATH);
	}
	
	public static void main(String[] args) {
		ConfigModel cm = ConfigModelFactory.createConfigModel();
		
		ActionModel am = cm.getAM("/regAction");
		
		ForwardModel fm = am.getFM("failed");
		
		System.out.println(fm.getPath());
	}
}