自己开发一个Struts框架

package com.viita; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.lang.reflect.Field; import java.lang.reflect.Method; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.beanutils.ConvertUtils; public class ActionServlet extends HttpServlet { public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String path = request.getServletPath(); path = path.substring(0,path.indexOf(".do")); ActionBean actionBean = (ActionBean)Tools.actions.get(path); String type = actionBean.getType(); try { Object action = Class.forName(type).newInstance(); String forBeanType = (String)Tools.forms.get(actionBean.getName()); Object formBean = initBean(Class.forName(forBeanType),request); Method method = action.getClass().getDeclaredMethod("execute", new Class[]{Object.class,HttpServletRequest.class,HttpServletResponse.class}); method.invoke(action, new Object[]{formBean,request,response}); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } public static Object initBean(Class cls,HttpServletRequest request) { Object o = null; try { o = cls.newInstance(); Field[] fields = cls.getDeclaredFields(); for (Field field : fields) { String fieldName = field.getName(); Method method = cls.getDeclaredMethod("set"+fieldName.substring(0,1).toUpperCase()+fieldName.substring(1), new Class[]{field.getType()}); String value = request.getParameter(fieldName); if(value==null) continue; method.invoke(o, new Object[]{ConvertUtils.convert(value, field.getType())}); } } catch (Exception e) { // TODO: handle exception System.out.println(e); } return o; } public void init() throws ServletException { // Put your code here InputStream in = this.getClass().getResourceAsStream("/struts.xml"); Tools.readXml(in); } }