类反射机制+责任链的设计模式demo

时间：2014-09-15 21:20:49 阅读：237 评论：0 收藏：0 [点我收藏+]

直接贴代码：

反射工具包
package com.zzk.cn;

import java.lang.reflect.Method;
import java.util.List;

/**
* Object 处理类
*
* @author zhengke.zzk
*/
public class ObjectInstance {

    /**
     * 根据class name 获得 object
     *
     * @param className
     * @return
     */
    public Object getObjectByClassName(String className) {
        try {
            Class cls = Class.forName(className);
            return cls.newInstance();
        } catch (Exception e) {
            throw new RuntimeException("ObjectInstance Get Class error:" + e);
        }
    }

    /**
     * 执行方法
     *
     * @param className
     * @param methodName
     * @return
     */
    public Object getMethodInvoke(String className, String methodName, Object object) {
        if (object == null) {
            throw new RuntimeException("ObjectInstance Get Method Invoke object is null");
        }
        try {
            Method method = Class.forName(className).getMethod(methodName, new Class[] {});
            return method.invoke(object);
        } catch (Exception e) {
            throw new RuntimeException("ObjectInstance Get Method Invoke error:" + e);
        }
    }

    /**
     * 执行方法
     *
     * @param className
     * @param methodName
     * @return
     */
    public List<Object> getListByClassName(String className, String methodName, Object object) {
        if (object == null) {
            throw new RuntimeException("ObjectInstance Get Method Invoke object is null");
        }
        try {
            Method method = Class.forName(className).getMethod(methodName, new Class[] {});
            return (List<Object>) method.invoke(object);
        } catch (Exception e) {
            throw new RuntimeException("ObjectInstance Get Method Invoke error:" + e);
        }
    }

}

接口
package com.zzk.cn;
public interface Filter {
   public void doFilter(Request request, Response response, FilterChain chain);

}

请求：
package com.zzk.cn;
public class Request {
   String requestStr;

   public String getRequestStr() {
       return requestStr;
   }

   public void setRequestStr(String requestStr) {
       this.requestStr = requestStr;
   }

}

响应：
package com.zzk.cn;
public class Response {
   String responseStr;

   public String getResponseStr() {
       return responseStr;
   }

   public void setResponseStr(String responseStr) {
       this.responseStr = responseStr;
   }

}

责任链
package com.zzk.cn;
import java.util.ArrayList;
import java.util.List;

public class FilterChain implements Filter {
   List<Filter> filters = new ArrayList<Filter>();
   int index = 0;

   public FilterChain addFilter(Filter f) {
       this.filters.add(f);
       return this;
   }

   @Override
   public void doFilter(Request request, Response response, FilterChain chain) {
       if (index == filters.size())
           return;
       Filter f = filters.get(index);
       index++;
       f.doFilter(request, response, chain);
   }
}

策略一：
package com.zzk.cn;
public class FaceFilter implements Filter {

   @Override
   public void doFilter(Request request, Response response, FilterChain chain) {
       request.requestStr = request.getRequestStr().replace(":)",
               "^V^-------FaceFilter");
       chain.doFilter(request, response, chain);
       response.responseStr += "-------FaceFilter";

   }

}

策略二：
package com.zzk.cn;
/**
* 过滤HTML中的脚本元素
* @author lcq
*
*/
public class HTMLFilter implements Filter {

   @Override
   public void doFilter(Request request, Response response,FilterChain chain) {
       request.requestStr = request.getRequestStr().replace("<", "[")
               .replace(">", "] --------HTMLFilter");
       chain.doFilter(request, response, chain);
       response.responseStr += "--------HTMLFilter";

   }

}

策略三：
package com.zzk.cn;
public class SesitiveFilter implements Filter {

   @Override
   public void doFilter(Request request, Response response, FilterChain chain) {
       request.requestStr = request.getRequestStr().replace("敏感", " ")
               .replace("猫猫", "haha------SesitiveFilter");
       chain.doFilter(request, response, chain);
       response.responseStr += "------SesitiveFilter";

   }

}

测试方法：
package com.zzk.cn;

public class Main2 {



   public static void main(String[] args) {
       String message = "敏感词汇，重庆，<script> 躲猫猫 :)";
       Request request = new Request();
       request.setRequestStr(message);
       Response response = new Response();
       response.setResponseStr("response");

       ObjectInstance objectInstance = new ObjectInstance();
       Object object = objectInstance.getObjectByClassName("com.zzk.cn.HTMLFilter");

       FilterChain fc = new FilterChain();
       fc.addFilter((Filter)object);
       fc.addFilter(new SesitiveFilter());

       FilterChain fc2 = new FilterChain();
       fc2.addFilter(new FaceFilter());

       fc.addFilter(fc2);
       fc.doFilter(request, response,fc);
       System.out.println("request = " + request.getRequestStr());
       System.out.println("response = " + response.getResponseStr());
   }
}

类反射机制+责任链的设计模式demo

标签：io java ar for sp cti 代码 on c

原文地址：http://blog.csdn.net/opzoonzhuzhengke/article/details/39298009

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