[开发测试]自定义mvc(框架)

思维导图（***）

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解决子控制器初始化问题
缺陷：需要频繁改动init中代码；

解决方案：

? ? ? ? 1.必须有配置文件 config.xml
? ? ? ? 2.配置文件config.xml中要包含处理业务的子控制器
? ? ? ? 3.读取到配置文件config.xml中的对应的处理浏览器请求的子控制器

代码：

DispatchServlet

package com.djj.framework;

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

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.beanutils.PropertyUtils;

import com.djj.web.BookAction;
import com.djj.web.GoodsAction;


@WebServlet("*.action")
public class DispatchServlet extends HttpServlet {
//	private Map<String, ActionSupport> actions = new HashMap<String, ActionSupport>();
	private ConfigModel configModel = null;

	@Override
	public void init() throws ServletException {
		try {
			configModel = ConfigModelFactory.build();
		} catch (Exception e) {
			e.printStackTrace();
		}
		
//		actions.put("/book", new BookAction());
//		actions.put("/goods", new GoodsAction());
//		actions.put("/order", new BookAction());
//		actions.put("/OrderItem", new BookAction());
	}
	
	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		doPost(req, resp);
	}

	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

		String uri = req.getRequestURI();
		uri = uri.substring(uri.lastIndexOf("/"), uri.lastIndexOf("."));
//		action=BookAction
//		ActionSupport action = actions.get(uri);
		ActionModel actionModel = configModel.pop(uri);
		String type = actionModel.getType();
		ActionSupport action;
		try {
			action = (ActionSupport) Class.forName(type).newInstance();
//		ActionSupport action = new BookAction()
			if(action instanceof ModelDriver) {
				ModelDriver m = (ModelDriver) action;
				Object obj = m.getModel();
//				
				Map<String, String[]> parameterMap = req.getParameterMap();
//				PropertyUtils.getProperty(obj, "")
				BeanUtils.populate(obj, parameterMap);
			}
//			execute->delete
			String res = action.execute(req, resp);
			
			ForwardModel forwardModel = actionModel.pop(res);
			if(forwardModel.isRedirect()) {
				resp.sendRedirect(req.getContextPath()+forwardModel.getPath());
			}else {
				req.getRequestDispatcher(forwardModel.getPath()).forward(req, resp);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

GoodsAction

package com.djj.web;

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

import com.djj.framework.ActionSupport;

public class GoodsAction extends ActionSupport {
	public void add(HttpServletRequest req, HttpServletResponse resp) {
		System.out.println("goodsDao.add()...");
	}
	
	public void edit(HttpServletRequest req, HttpServletResponse resp) {
		System.out.println("goodsDao.edit()...");
	}
	
	public void delete(HttpServletRequest req, HttpServletResponse resp) {
		System.out.println("goodsDao.delete()...");
	}
	
	public void list(HttpServletRequest req, HttpServletResponse resp) {
		System.out.println("goodsDao.list()...");
	}
}

运行结果:

?解决参数实体类分装问题：

对于前端传参，实体类属性封装req.getparameter("")代码 是重复的；

解决方案：泛型+反射；

代码：

BookAction

package com.djj.web;

import java.io.IOException;
import java.lang.reflect.Field;

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

import com.djj.entity.Book;
import com.djj.framework.ActionSupport;
import com.djj.framework.ModelDriver;

public class BookAction extends ActionSupport implements ModelDriver<Book>{
	private Book book = new Book();
//	execute
	
	private String delete(HttpServletRequest req, HttpServletResponse resp) {
		System.out.println("BookAction调用bookDao.delete()...");
	
//		try {
//			req.getRequestDispatcher("/bookList.jsp").forward(req, resp);
			resp.sendRedirect("/bookList.jsp");
//			this.list(req, resp);
//		} catch (Exception e) {
//			e.printStackTrace();
//		}
		return "toList";
	}
	
	private void add(HttpServletRequest req, HttpServletResponse resp) {
		System.out.println("BookAction调用bookDao.add()...");
	}
	
	private String list(HttpServletRequest req, HttpServletResponse resp) {
		System.out.println("BookAction调用bookDao.list()...");
//		try {
//			req.getRequestDispatcher("/bookList.jsp").forward(req, resp);
//		} catch (Exception e) {
//			e.printStackTrace();
//		}
		return "list";
	}
	
	private void ref(HttpServletRequest req, HttpServletResponse resp) {
//		Book book = new Book();
//		book.setBid(req.getParameter("bid"));
//		book.setBname(req.getParameter("bname"));
//		book.setPrice(req.getParameter("price"));
//		book.setAuthor(req.getParameter("author"));
//		book.setPublish(req.getParameter("publish"));
		System.out.println(book);
		System.out.println("BookAction调用bookDao.ref(book)...");
	}

	@Override
	public Book getModel() {
		return book;
	}
}

运行结果：

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