Java模仿Struts2模型驱动的实现
首先，我没有看过Struts2的源码，是自己写的。
我自己写的一个框架Dreamer，模仿Struts2的。看下Action配置
package org.dreamer.action.dao.impl;import java.lang.reflect.Field;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import javax.management.ReflectionException;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.dreamer.action.dao.IActionForm;import org.dreamer.code.ModelDriven;import org.dreamer.exception.AbnormalException;import org.dreamer.exception.InitializeActionException;import org.dreamer.exception.ModelDrivenException;import org.dreamer.orm.convetor.FieldConvertor;import org.dreamer.support.ServletActionContent;import org.dreamer.util.InterfaceUtil;import org.dreamer.util.MethodsUtil;import org.dreamer.util.StringUtil;/** * 普通表单处理 * @author Pan * */public class CommonForm implements IActionForm{private HttpServletRequest request;//请求对象private HttpServletResponse response;//响应对象private Map<String, Object> map=new HashMap<String, Object>();//map对象private Object result;//返回类型private String methodName;//需要操作的方法private Object action;//用户的Actionpublic CommonForm(HttpServletRequest request,HttpServletResponse response,Object action,String methodName){this.request=request;this.response=response;this.action=action;this.methodName=methodName;}/** * 模型驱动处理 * @throws NoSuchMethodException * @throws SecurityException * @throws InvocationTargetException * @throws IllegalAccessException * @throws IllegalArgumentException * @throws ModelDrivenException */private void modelDriven() throws SecurityException, NoSuchMethodException, IllegalArgumentException, IllegalAccessException, InvocationTargetException, ModelDrivenException{//获取Action,检测是否实现了ModelDriven接口Class<?> cls=this.action.getClass();Boolean exits=InterfaceUtil.checkInterface(cls.getInterfaces(), ModelDriven.class);if(exits){//调用方法Method method=cls.getMethod("getModel", null);if(method!=null){Object object=method.invoke(this.action, null);if(object==null){throw new ModelDrivenException();}else {initField(object);}}//initField(action);}}public Map getMap() {// TODO Auto-generated method stubreturn this.map;}public Object getResult() {// TODO Auto-generated method stubreturn result;}/** * 将请求的值放入map */private void invokeMap(){Iterator it=request.getParameterMap().entrySet().iterator();while (it.hasNext()) {Map.Entry entry=(Map.Entry)it.next();String key=entry.getKey().toString();String value=StringUtil.getStringArray((String[])entry.getValue());map.put(key, value);}}/** * 将相关对象设置到用户的Action中 * @throws AbnormalException * @throws Exception * @throws InitializeActionException * @throws NoSuchMethodException * @throws SecurityException * @throws InvocationTargetException * @throws IllegalAccessException * @throws IllegalArgumentException */public void Initialization() throws NullPointerException,ReflectionException,RuntimeException, AbnormalException{//给对象设置字段参数initField(action);//调用Action的方法try{this.result=invokeMethod(this.action);}catch (NullPointerException e) {StringBuffer sb=new StringBuffer();sb.append(e.toString()+"\r\n");sb.append("Initialize the user Action in the process of abnormal happened, please check the Action method for error!\r\n");sb.append("Abnormal method:"+action.getClass().getName()+"."+this.methodName+"()");throw new AbnormalException(sb.toString());}catch (Exception e) {StringBuffer sb=new StringBuffer();sb.append(e.toString()+"\r\n");sb.append("Initialize the user Action in the process of abnormal happened, please check the Action method for error!\r\n");sb.append("Abnormal method:"+action.getClass().getName()+"."+this.methodName+"()");sb.append(e.getMessage());throw new AbnormalException(sb.toString());}}/** * 初始化字段 */private void initField(Object object){//获取字段集合Field[] fields=object.getClass().getDeclaredFields();//获取方法集合Method [] methods=object.getClass().getDeclaredMethods();for (Field field : fields) {//给指定赋值String MethodName="set"+StringUtil.capitalize(field.getName());if(MethodsUtil.exist(methods,MethodName)){field.setAccessible(true);Object value=map.get(field.getName());if(value!=null){FieldConvertor.convertor(object, field, value.toString());}}}}/** * 调用方法 * @throws NoSuchMethodException * @throws SecurityException * @throws InvocationTargetException * @throws IllegalAccessException * @throws IllegalArgumentException */private Object invokeMethod(Object object) throws SecurityException, NoSuchMethodException, IllegalArgumentException, IllegalAccessException, InvocationTargetException{//创建ServletActionContent实例对象ServletActionContent servlet=new ServletActionContent();servlet.setRequest(request);servlet.setResponse(response);servlet.setSession(request.getSession());//创建参数类型Class parameter[]=new Class[]{ServletActionContent.class};Method method=object.getClass().getMethod("setServletActionContent", parameter);//参数值Object obj[]=new Object[]{servlet};method.invoke(object, obj);//操作方法//调用execute 方法//Method execute=class1.getMethod("execute", new Class[0]);Method execute=object.getClass().getMethod(this.methodName, new Class[0]);Object type= execute.invoke(object, new Class[0]);return type;//设置返回类型}public Object getAction() {// TODO Auto-generated method stubreturn this.action;}public void handle() throws NullPointerException, ReflectionException, RuntimeException, NoSuchMethodException, IllegalAccessException, InvocationTargetException, ModelDrivenException, AbnormalException {// TODO Auto-generated method stubinvokeMap();modelDriven();Initialization();}}