自定义MVC
数据库：Oracle
表：User(id,uname,upwd)
自定义Struts框架
一、定义Action接口
1 import javax.servlet.http.*;
2
3 public interface Action {
4 /**
5 * 执行方法
6 * @return
7 */
8 String execute(HttpServletRequest request,HttpServletResponse response);
9 }
二、根据特定功能实现Action接口（这里用User表添加用户）
1 import javax.servlet.http.*;
2
3 import com.biz.UserBiz;
4 import com.biz.impl.UserBizImpl;
5 import com.entity.User;
6 import com.mystruts.Action;
7 /**
8 * 注册Action 完成注册功能 调用业务层 返回页面
9 * @author Administrator
10 *
11 */
12 public class RegAction implements Action {
13
14 @Override
15 public String execute(HttpServletRequest request,
16 HttpServletResponse response) {
17 //获取请求内容
18 String uname = request.getParameter("uname");
19 String upwd = request.getParameter("upwd");
20 //创建User 对象 创建UserBizImpl对象
21 User user = new User(uname,upwd);
22 UserBiz userBiz = new UserBizImpl();
23 //调用新增用户的方法
24 if(userBiz.reg(user)){
25 request.getSession().setAttribute("login", user);
26 return "login.jsp";
27 }else{
28 request.getSession().setAttribute("msg", "注册失败！");
29 return "register.jsp";
30 }
31 }
32
33 }
三、ActionFilter(负责请求的转发，将用户的请求交给相应的action进行处理)
1 import java.io.IOException;
2
3 import javax.servlet.Filter;
4 import javax.servlet.FilterChain;
5 import javax.servlet.FilterConfig;
6 import javax.servlet.ServletException;
7 import javax.servlet.ServletRequest;
8 import javax.servlet.ServletResponse;
9 import javax.servlet.http.HttpServletRequest;
10 import javax.servlet.http.HttpServletResponse;
11
12 import com.action.RegAction;
13 /**
14 * ActionFilter 负责请求的转发 将用户的请求交给相应的Action进行处理
15 * @author Administrator
16 *
17 */
18 public class ActionFilter implements Filter {
19
20 private FilterConfig config;
21
22 @Override
23 public void destroy() {
24 // TODO Auto-generated method stub
25
26 }
27
28 @Override
29 public void doFilter(ServletRequest arg0, ServletResponse arg1,
30 FilterChain chain) throws IOException, ServletException {
31 //强转对象
32 HttpServletRequest req = (HttpServletRequest)arg0;
33 HttpServletResponse resp = (HttpServletResponse)arg1;
34 //获取Action 去执行相应的功能
35 Action action = getAction(req);
36 //调用execute方法执行
37 String result = null;
38 try{
39 result = action.execute(req, resp);
40 }catch(Exception ex){
41 ex.printStackTrace();
42 }
43 //正常得到处理后的返回值 进行页面跳转
44 if(null!=result){
45 req.getRequestDispatcher(result).forward(req, resp);
46 }
47 }
48
49 @Override
50 public void init(FilterConfig conf) throws ServletException {
51 // TODO Auto-generated method stub
52 this.config = conf;
53 }
54
55 //得到请求地址 通过请求地址得到对应action 通过request得到请求信息
56 public Action getAction(HttpServletRequest request){
57 //获取上URI
58 String uri = request.getRequestURI();
59 //获取请求的路径
60 String contextPath = request.getContextPath();
61 //截取获得action路径
62 String actionPath = uri.substring(contextPath.length());
63 //获取action名称
64 String actionName = actionPath.substring(1,actionPath.lastIndexOf('.')).trim();
65 //根据Action名称创建指定Action
66 Action action = null;
67 if("reg".equals(actionName)){
68 action = new RegAction();
69 }
70
71 return action;
72 }
73
74
75 }
四、register.jsp页面
1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 2 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 3 <html> 4 <head> 5 6 <title>注册页面</title> 7 </head> 8 9 <body> 10 <form action="reg.action" method="post"> 11 username:<input name="uname" /><br/> 12 password:<input name="upwd" type="password"/><br/> 13 <input type="submit" value="注册"/> 14 <input type="reset" value="重置"/> 15 </form> 16 </body> 17 </html>
五、配置web.xml
1 <filter> 2 <filter-name>openSessionInView</filter-name> 3 <filter-class>com.web.OpenSessionInViewFilter</filter-class> 4 </filter> 5 <filter-mapping> 6 <filter-name>openSessionInView</filter-name> 7 <url-pattern>/*</url-pattern> 8 </filter-mapping> 9 <!-- 配置ActionFilter过滤器 --> 10 <filter> 11 <filter-name>actionFilter</filter-name> 12 <filter-class>com.mystruts.ActionFilter</filter-class> 13 </filter> 14 <filter-mapping> 15 <filter-name>actionFilter</filter-name> 16 <url-pattern>*.action</url-pattern> 17 </filter-mapping>
上面就完成了一个简单的自定义MVC框架 下一篇将继续深入讲解自定义MVC