struts2 中用到的 设计模式之--适配器模式（adapter）

BaseAction.java

 package cheng.controller;

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

 import org.apache.struts2.interceptor.ServletRequestAware;
 import org.apache.struts2.interceptor.ServletResponseAware;

 import com.opensymphony.xwork2.ActionSupport;
 import com.opensymphony.xwork2.ModelDriven;
 import com.opensymphony.xwork2.Preparable;
 //隐藏目标接口的抽象适配器
 @SuppressWarnings("all")
 public abstract class BaseAction<T> extends ActionSupport implements
        ModelDriven<T>, Preparable, ServletRequestAware, ServletResponseAware {

     public abstract T getModel();

     public void prepare() throws Exception {
    }

     public void setServletRequest(HttpServletRequest request) {
    }

     public void setServletResponse(HttpServletResponse response){
    }

}

package cheng.controller;

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

import org.apache.struts2.interceptor.ServletRequestAware;
import org.apache.struts2.interceptor.ServletResponseAware;

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.opensymphony.xwork2.Preparable;
//隐藏目标接口的抽象适配器
@SuppressWarnings("all")
public abstract class BaseAction<T> extends ActionSupport implements
		ModelDriven<T>, Preparable, ServletRequestAware, ServletResponseAware {

	public abstract T getModel();

	public void prepare() throws Exception {
	}

	public void setServletRequest(HttpServletRequest request) {
	}

	public void setServletResponse(HttpServletResponse response){
	}
	
}

MoneyAction.java

 package cheng.controller.money;

 import java.io.IOException;
 import java.util.Map;

 import javax.servlet.http.HttpServletResponse;

 import net.sf.json.JSONObject;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.stereotype.Controller;

 import com.opensymphony.xwork2.ActionContext;

 import cheng.controller.BaseAction;
 import cheng.entity.Money;
 import cheng.service.MoneyManager;

 @Controller
 public class MoneyAction extends BaseAction<Money> {
     private static final long serialVersionUID = -6769263990506962430L;
     @Autowired
     @Qualifier("moneyManager")
     private MoneyManager moneyManager;

     @Autowired
     private Money money;

     @Override
     public Money getModel() {
         return money;
    }

     private HttpServletResponse response;

     public void setServletResponse(HttpServletResponse response) {
         this.response = response;
    }

     @SuppressWarnings("unchecked")
     public String execute() throws IOException {
         System.out.println("invoked execute method!!response");
        Money money = getModel();
        String record = money.getType();
         if (null != record) {
            JSONObject jsonObject = JSONObject.fromObject(record);
            System.out.println(jsonObject.toString());
             response.setCharacterEncoding("UTF-8");
             response.setHeader("json", jsonObject.toString());
            response.flushBuffer();
             return "money";//go to money.jsp
                  }
         return "list";//go to list.jsp
    }