1.XML建模是什么
XML 建模是一种将数据和信息组织为一组 XML 文档或模型的方式。在 XML 建模中，可以使用标记语言的特点来表示数据和信息之间的关系，并定义其结构和格式。XML 建模可以提高数据和信息的可读性，增加其可维护性和扩展性，有助于数据和信息的交换和共享。
2. XML建模的步骤
2.2建模分两步：
2.2.3以面向对象的编程思想，描述xml资源文件
2.2.4将xml文件中内容封装进model实体对象
ConfigModel、ActionModel、ForwardModel
A.config节点下有多个子action节点，无节点属性
B.action节点下有多个子forward节点，有节点属性
C.forward下无子节点，有节点属性
首先让我们看看mvc.xml里面的内容：
如下所示：
首先我们要对它的各个节点进行对象化：
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; }
ActionModel:
private String path; private String type; private Map<String, ForwardMdoel> fMap = new HashMap<String, ForwardMdoel>(); 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(ForwardMdoel forwardMdoel) { fMap.put(forwardMdoel.getName(), forwardMdoel); } //从action中通过name值取出forward public ForwardMdoel pop(String namr) { return fMap.get(namr); }
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) { ConfigModel configModel = new ConfigModel(); ActionModel actionModel = configModel.pop("/loginAction"); ForwardMdoel forwardMdoel = actionModel.pop("success"); System.out.println(forwardMdoel.getPath()); }
ConfigModelFactory:
public static ConfigModel build(String xmlPath) throws Exception { 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，就意味这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")); // actionModel要有forwardModel，就意味这forwardModel要有类容，然后放入到actionModel中去 List<Element> forwordEles = actionEle.selectNodes("forward"); for (Element forwordEle : forwordEles) { System.out.println(forwordEle.asXML()); ForwardMdoel forwardMdoel = new ForwardMdoel(); forwardMdoel.setName(forwordEle.attributeValue("name")); forwardMdoel.setPath(forwordEle.attributeValue("path")); //只有填写false才是转发，其它都为重定向 // forwardMdoel.setRedirect(false); forwardMdoel.setRedirect(!"false".equals(forwordEle.attribute("redirect"))); actionModel.push(forwardMdoel); } configModel.push(actionModel); } return configModel; } public static ConfigModel build() throws Exception { return build("/mvc.xml"); } public static void main(String[] args) throws Exception { ConfigModelFactory.build(); }
