一起写框架-MVC框架-基础功能-实现forward和redirect的跳转(四)

 1 package ioc.webmvc.views; 2 ?3 import java.io.IOException; 4 ?5 import javax.servlet.ServletException; 6 import javax.servlet.http.HttpServletRequest; 7 import javax.servlet.http.HttpServletResponse; 8 ?9 /**10 ?* 声明一个视图解释器接口，用于方便以后扩展支持多种视图，如：Freemarker,Velocity等 默认支持JSP11 ?* 12 ?* @author ranger13 ?*14 ?*/15 public interface ViewRelover {16 ????/**17 ?????* 定义一个跳转到视图的方法18 ?????* 19 ?????* @param result20 ?????* @param request21 ?????* @param response22 ?????* @throws IOException23 ?????* @throws ServletException24 ?????*/25 ????void toView(String result, HttpServletRequest request, HttpServletResponse response)26 ????????????throws IOException, ServletException;27 }

 1 package ioc.webmvc.views; 2 ?3 import java.io.IOException; 4 ?5 import javax.servlet.ServletException; 6 import javax.servlet.http.HttpServletRequest; 7 import javax.servlet.http.HttpServletResponse; 8 ?9 public class JspViewRelover implements ViewRelover {10 ????11 ????@Override12 ????public ?void toView(String result,HttpServletRequest request,HttpServletResponse response) throws IOException, ServletException{13 ????????if (result != null) {14 ????????????StringBuilder sb = new StringBuilder(result);15 ????????????String substring = sb.substring(0, sb.indexOf(":") + 1);16 ????????????System.out.println("-返回类型:-" + substring);17 ????????????if (substring != null) {18 ????????????????String dispacherStr = sb.substring(sb.indexOf(":") + 1, sb.length());19 ????????????????if (substring.equals("redirect:")) {20 ????????????????????response.sendRedirect(request.getContextPath()+"/"+dispacherStr);21 ????????????????} else if (substring.equals("forward:")) {22 ????????????????????request.getRequestDispatcher(dispacherStr).forward(request, response);23 ????????????????} else {24 ????????????????????throw new RuntimeException("返回的映射路径格式错误！");25 ????????????????}26 27 ????????????} else {28 ????????????????request.getRequestDispatcher(result).forward(request, response);29 ????????????}30 31 ????????}32 ????}33 34 }

 1 ????@Override 2 ????protected void service(HttpServletRequest request, HttpServletResponse response) 3 ????????????throws ServletException, IOException { 4 ????????System.out.println("-测试成功--"); 5 ?6 ????????ControllerRelolver rs = new ControllerRelolver(); 7 ????????try { 8 ?????????????//1.根据路径执行Controller对应的映射方法 9 ????????????String result = rs.execute(request, response, contextApplication.getContext());10 ?????????????//2.执行视图解释器，返回视图11 ????????????JspViewRelover viewRelover=new JspViewRelover();12 ????????????viewRelover.toView(result, request, response);13 ????????14 ????????} catch (IllegalAccessException e) {15 ????????????// TODO Auto-generated catch block16 ????????????e.printStackTrace();17 ????????} catch (IllegalArgumentException e) {18 ????????????// TODO Auto-generated catch block19 ????????????e.printStackTrace();20 ????????} catch (InvocationTargetException e) {21 ????????????// TODO Auto-generated catch block22 ????????????e.printStackTrace();23 ????????}24 25 ????}

 1 package org.webmvc.controller; 2 ?3 import javax.servlet.http.HttpServletRequest; 4 import javax.servlet.http.HttpServletResponse; 5 ?6 import ioc.core.annotation.stereotype.Controller; 7 import ioc.webmvc.annotation.RequestMapping; 8 ?9 @Controller10 public class UserController {11 ????12 ????/**13 ?????* 路径规则：14 ?????* 1.必须包括有/开头15 ?????* 2.后缀必须忽略不写16 ?????* 如：http://localhost:8080/webmvc-demo-test-01/test.do17 ?????* 对应的映射路径为：/test18 ?????* ?19 ?????*/20 ????@RequestMapping(value = "/login")21 ????public String login(HttpServletRequest request,HttpServletResponse response){22 ????????System.out.println("-登录Controller-");23 ????????return "redirect:/login.jsp";24 25 ????}26 27 }28