- 面向对象的方式去操作/获取xml文件里的内容
面向对象的方式去操作/获取xml文件里的内容
1.以面向对象的的思想形容/封装模型对象，形容的是xml文件
往config标签中添加了一个action
往action标签中添加了4个forward标签
将action标签的属性值path、type发生了更改
将forward标签的属性值name、path、redirect发生了更改
1.1以面向对象的思想思考上述操作
configModel对象中添加一个actionModel对象，因为actionModel在configModel中是唯一的
所以在configModel中必然有一个属性（容器Map），能够以一对一的方式存储不同个------------actionModel，还有添加方法，查询方法
actionMondel也有一个属性（容器Map），也有添加方法，查询方法
actionMondel还有属性path、type
forwardModel还有属性name、path、redirect
<?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="/loginAction" type="test.LoginAction"> <forward name="add" path="/bookAdd.jsp" redirect="false" /> <forward name="del" path="/reg.jsp" redirect="true" /> <forward name="list" path="/list.jsp" redirect="false" /> <forward name="upd" path="/login.jsp" redirect="false" /> </action> </config>
package com.zhulinjun; 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; } } package com.zhulinjun; import java.util.HashMap; import java.util.Map; public class ConfigMondel { 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); } } package com.zhulinjun; 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action中放 压栈 public void push(ForwardModel forwardModel) { fMap.put(forwardModel.getName(), forwardModel); } // 从action中通过name值取出forward public ForwardModel pop(String name) { return fMap.get(name); } }
2.将xml的内容初始化到描述出的模型对象中（23种设计模式--工厂模式--创建型模式）
package com.zhulinjun; 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; public class ConfigModelFactory { //动态 public static ConfigModel build(String xmlPath) throws Exception { ConfigModel configModel=new ConfigModel(); InputStream in = ConfigModelFactory.class.getResourceAsStream(xmlPath); SAXReader sr=new SAXReader(); Document doc = sr.read(in); // System.out.println(doc.asXML()); // configModel要有类容，就意味着actionModel要有类容，然后放入到configModel中去 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")); // configModel要有forwardModel，就意味着forwardModel要有类容，然后放入到actionModel中去 List<Element> forwardEles = actionEle.selectNodes("forward"); for (Element forwardEle: forwardEles) { System.out.println(forwardEle.asXML()); ForwardModel forwardModel = new ForwardModel(); forwardModel.setName(forwardEle.attributeValue("name")); forwardModel.setPath(forwardEle.attributeValue("path")); // 只有false才是转发，其他都为重定向 // forwardModel.setRedirect(false); forwardModel.setRedirect(!"false".equals(forwardEle.attributeValue("redirect"))); actionModel.push(forwardModel); } configModel.push(actionModel); } return configModel; } //静态 //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()); configModel要有类容，就意味着actionModel要有类容，然后放入到configModel中去 // 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")); configModel要有forwardModel，就意味着forwardModel要有类容，然后放入到actionModel中去 // List<Element> forwardEles = actionEle.selectNodes("forward"); // for (Element forwardEle: forwardEles) { // System.out.println(forwardEle.asXML()); // ForwardModel forwardModel = new ForwardModel(); // forwardModel.setName(forwardEle.attributeValue("name")); // forwardModel.setPath(forwardEle.attributeValue("path")); 只有false才是转发，其他都为重定向 forwardModel.setRedirect(false); // forwardModel.setRedirect(!"false".equals(forwardEle.attributeValue("redirect"))); // actionModel.push(forwardModel); // } // // configModel.push(actionModel); // } // // return configModel; //} public static void main(String[] args) throws DocumentException { // ConfigModelFactory.build(); } }
