package com.hongyuan.route; import java.io.File; import java.io.IOException; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletRequest; public class WebFilter implements Filter {  public static final String BASE_PACKAGE="com.hongyuan";  public static final String CLASS_FLAG="Action";  @Override  public void destroy() {}  @Override  public void doFilter(ServletRequest request, ServletResponse response,FilterChain chain) throws IOException, ServletException {   if(!hasResouce(request)){    String requestPath=((HttpServletRequest)request).getServletPath();    if(requestPath.indexOf(".")>=0){     requestPath=requestPath.substring(0, requestPath.indexOf("."));    }    if(requestPath.endsWith("/")){     requestPath=requestPath.substring(0, requestPath.length()-1);    }    //获取请求的类全限定名    String className=BASE_PACKAGE+requestPath.replaceAll("/", ".")+CLASS_FLAG;    //获取请求方法名称    String methodName=request.getParameter("method");    if(methodName==null||"".equals(methodName.trim())){     methodName="index";    }    try {     //获取处理类并响应请求     Class clazz=Class.forName(className);     Object instance=this.initContext(clazz,request,response);     Method method=clazz.getMethod(methodName, new Class[]{});     Object result=method.invoke(instance, new Object[]{});     response.getWriter().print(result);    } catch (Exception e) {     e.printStackTrace(response.getWriter());    }   }else{    chain.doFilter(request, response);   }  }  //判断是否存在请求的资源  private boolean hasResouce(ServletRequest request) {   String realPath=request.getServletContext().getRealPath(((HttpServletRequest)request).getServletPath());   File resouce=new File(realPath);   if(resouce.exists()){    return true;   }else{    return false;   }  }  //初始化上下文  private Object initContext(Class clazz, ServletRequest request,    ServletResponse response) throws Exception{   Object instance=clazz.newInstance();   clazz.getMethod("setRequest",new Class[]{ServletRequest.class}).invoke(instance, new Object[]{request});   clazz.getMethod("setResponse", new Class[]{ServletResponse.class}).invoke(instance, new Object[]{response});   return instance;  }  @Override  public void init(FilterConfig arg0) throws ServletException {} }

package com.hongyuan.route; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; public abstract class BaseAction {  protected ServletRequest request=null;  protected ServletResponse response=null;  public ServletRequest getRequest() {   return request;  }  public void setRequest(ServletRequest request) {   this.request = request;  }  public ServletResponse getResponse() {   return response;  }  public void setResponse(ServletResponse response) {   this.response = response;  } }