一个简单的MVC框架的实现

package com.togogo.webtoservice;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public interface Action {
    
    /**
     * 默认的执行方法
     * @param request 传入处理的请求对象
     * @param response 传入处理的响应对象
     * @return 返回一个跳转的路径
     */
    public String execute(HttpServletRequest request,
            HttpServletResponse response);

}

package com.togogo.webtoservice;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public abstract class BaseAction implements Action {

    @Override
    public String execute(HttpServletRequest request,
            HttpServletResponse response) {
        String result = null;
        String uri = request.getRequestURI();
        StringBuilder sb = new StringBuilder(uri);
        String path = sb.substring(uri.lastIndexOf("!") + 1,
                uri.lastIndexOf("."));
        // 已知，方法与uri的参数的字符串，一样的，那么有没有方法，可以通过方法名（字符串）直接调用方法？
        // 实现通过方法名，直接调用方法，就类动态技术
        try {
            Method method = this.getClass().getDeclaredMethod(path,
                    HttpServletRequest.class, HttpServletResponse.class);
            result = (String) method.invoke(this, request, response);
        } catch (NoSuchMethodException e) {
            
            e.printStackTrace();
        } catch (SecurityException e) {
         
            e.printStackTrace();
        } catch (IllegalAccessException e) {
     
            e.printStackTrace();
        } catch (IllegalArgumentException e) {
            
            e.printStackTrace();
        } catch (InvocationTargetException e) {
   
            e.printStackTrace();
        }

        return result;
    }

}

package com.togogo.webtoservice;

import java.util.HashMap;
import java.util.Map;
import java.util.ResourceBundle;

/**
 * 路径与类名映身
 * 
 * @author Administrator
 *
 */
public class Config {
    // private static Map<String, String> classNames = new HashMap<String,
    // String>();

    /**
     * 通过key
     * 
     * @param key
     * @return
     */
    public static String getClassName(String key, String config) {
        ResourceBundle bundle = null;
        if (config == null||"".equals(config)) {
            bundle = ResourceBundle.getBundle("Action");
        } else {
            bundle = ResourceBundle.getBundle(config);
        }
        return bundle.getString(key);
    }

    // static {
    // classNames.put("/user", "com.togogo.action.UserAction");
    // classNames.put("/admin", "com.togogo.action.AdminAction");
    // }

    public static void main(String[] args) {
        // 用于以类的形式来读取properties对象
        ResourceBundle bundle = ResourceBundle
                .getBundle("com.togogo.webtoservice.Action");
        System.out.println(bundle.getString("user"));
    }

}