模拟struts2框架代码.rar_模拟struts框架

package framework.core; import java.io.InputStream; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import org.dom4j.Attribute; import org.dom4j.Document; import org.dom4j.DocumentException; import org.dom4j.Element; import framework.util.XmlUtil; public class ActionManager { /** * 默认路径 */ public static final String STRUTS_XML_FILE = "/mystruts.xml"; /** * mystruts.xml类路径 */ private String filePath; //拦截器 Map<String,MyInterceptor> intercepts = new HashMap<String, MyInterceptor>(); public ActionManager() { this.filePath = STRUTS_XML_FILE; } public ActionManager(String filePath) { this.filePath = filePath; } /** * 根据MyFilter传过来的actionName,得到相应的Action类 */ public ActionClass getActionClass(String actionName) { // 得到mystruts.xml类路径 InputStream is = this.getClass().getResourceAsStream(filePath); try { Document doc = XmlUtil.getDocument(is); Element root = XmlUtil.getRoot(doc); // 得到所有的package结点 List<Element> packages = XmlUtil.getElementsByName(root, "package"); if (packages != null && packages.size() > 0) { for (Element _package : packages) { // 得到某个package下的所有结点 List<Element> actions = XmlUtil.getElementsByName(_package, "action"); for (Element elem : actions) { // 判断某个<result>结点元素的name属性是否与传递过来的actionName相等,如果相等那么将其method属性取出 Attribute att = XmlUtil .getAttributeByName(elem, "name"); if (actionName.equals(att.getText())) { Attribute cls = XmlUtil.getAttributeByName(elem, "class"); Attribute method = XmlUtil.getAttributeByName(elem, "method"); List<Element> results = XmlUtil.getElementsByName( elem, "result"); List<Element> interceptor_ref = XmlUtil.getElementsByName( elem, "interceptor-ref"); ActionClass actionClass = new ActionClass(); actionClass.setClassName(cls.getText()); if(method!=null){ actionClass.setMethod(method.getText()); }else{ actionClass.setMethod("execute"); } actionClass.setElements(results); actionClass.setInterceptors(interceptor_ref); return actionClass; } } } } } catch (DocumentException e) { e.printStackTrace(); throw new RuntimeException("mystruts.xml 不存在或有误"); } return null; } /** * 设置Action参数 */ public Object setValues(ActionClass actionClass, Map<String, String[]> params) { try { // 得到Action的Class,实例化action Class clas = Class.forName(actionClass.getClassName()); Object obj = clas.newInstance(); if (params != null && params.size() > 0) { Iterator<String> it = params.keySet().iterator(); while (it.hasNext()) { String key = it.next(); String[] value = params.get(key); String upperFirstLetter = key.substring(0, 1).toUpperCase(); // 获得和属性对应的setXXX()方法的名字 String setMethodName = "set" + upperFirstLetter + key.substring(1); Method method = null; // 看看该页面提交的参数名中,是否在Action有set方法 try { method = clas.getMethod(setMethodName,new Class[] { String.class }); } catch (NoSuchMethodException e) { System.out.println(actionClass.getClassName() + "." + setMethodName + "(" + String.class.getName() + ") 不存在"); } if (method != null) { // 如果有set方法,就调用set方法,进行赋值操作 String result = this.StringArrayToString(value); method.invoke(obj, new String[] { result }); } } } return obj; } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } catch (SecurityException e) { e.printStackTrace(); } catch (InstantiationException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (IllegalArgumentException e) { e.printStackTrace(); } throw new RuntimeException(""); } /** * 调用Action */ public Object invokeAction(ActionClass actionClass,String resultCode) { try { Object obj = actionClass.getAction(); if(resultCode==null){ Class clas = obj.getClass(); Method method = clas.getMethod(actionClass.getMethod(), null); resultCode = (String) method.invoke(obj, null); } this.setInvokeResult(resultCode, actionClass); actionClass.setAction(obj); return obj; } catch (InvocationTargetException e) { e.printStackTrace(); throw new RuntimeException("出现InvocationTargetException异常:" + e.getMessage()); } catch (SecurityException e) { e.printStackTrace(); throw new RuntimeException("出现SecurityException异常:" + e.getMessage()); } catch (NoSuchMethodException e) { e.printStackTrace(); throw new RuntimeException("出现NoSuchMethodException异常:" + e.getMessage()); } catch (IllegalAccessException e) { e.printStackTrace(); throw new RuntimeException("出现IllegalAccessException异常:" + e.getMessage()); } catch (IllegalArgumentException e) { e.printStackTrace(); throw new RuntimeException("出现IllegalArgumentException异常:" + e.getMessage()); } } /** * 匹配<result name="success">/index.jsp</result> Xml中的result * name属性，如果匹配成功,设置返回结果"/index.jsp" */ private void setInvokeResult(String result, ActionClass actionClass) { List<Element> elements = actionClass.getElements(); for (Element elem : elements) { Attribute name = XmlUtil.getAttributeByName(elem, "name"); if (result.equals(name.getText())) { actionClass.setResult(elem.getText()); return; } } } public String getFilePath() { return filePath; } //获得拦截器 public Map<String,MyInterceptor> getInterceptor() { // 得到mystruts.xml类路径 InputStream is = this.getClass().getResourceAsStream(filePath); try { Document doc = XmlUtil.getDocument(is); Element root = XmlUtil.getRoot(doc); // 得到所有的package结点 List<Element> packages = XmlUtil.getElementsByName(root, "package"); if (packages != null && packages.size() > 0) { for (Element _package : packages) { // 得到某个interceptors下的所有结点 List<Element> inters = XmlUtil.getElementsByName(_package, "interceptors"); for (Element element : inters) { List<Element> inter = XmlUtil.getElementsByName(element,"interceptor"); for(Element elem : inter){ Attribute name = XmlUtil.getAttributeByName(elem, "name"); Attribute cls = XmlUtil.getAttributeByName(elem,"class"); try { //实例化拦截器 Class clas = Class.forName(cls.getText()); Object obj = clas.newInstance(); intercepts.put(name.getText(),(MyInterceptor)obj); } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); }catch (InstantiationException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } } } } catch (DocumentException e) { e.printStackTrace(); throw new RuntimeException("mystruts.xml 不存在或有误"); } return intercepts;