Sping MVC 入门
来源:互联网 发布:特蕾莎修女知乎 编辑:程序博客网 时间:2024/04/27 04:27
基于极客学院教程的学习笔记
Controller负责数据的接受和页面的跳转,具体的业务逻辑交由service处理
Service负责业务逻辑,发布命令
Dao负责接受命令进行数据处理
配置web.xml和Sping-MVC.xml
<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:jsp="http://java.sun.com/xml/ns/javaee/jsp" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <display-name></display-name> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:applicationContext.xml</param-value> </context-param> <servlet> <servlet-name>spring</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/spring-mvc.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>spring</servlet-name> <!-- 使用.html作为请求后缀 --> <url-pattern>*.html</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list></web-app>
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd"> <!-- 自动扫描 com.jikexueyuan 包下面的所有组件(使用了springmvc注解)--> <context:component-scan base-package="com.jikexueyuan.*" /></beans>
Controller
JSP页面通过提交不同的请求进入Controller调用不同的方法
比如:如果请求是login.xml 则调用 toLoginPage()方法
package com.jikexueyuan.demo.springmvc.lesson2.controller;@Controller@SessionAttributes("user")public class UserController { @Resource UserService service; @RequestMapping("login") public String toLoginPage(){ return "/WEB-INF/jsp/login.jsp"; } @RequestMapping(value = "doLogin", method = RequestMethod.POST) public String doLogin(@RequestParam String username , @RequestParam String password, HttpServletRequest request, ModelMap map ){ try { //具体逻辑交由service处理 User user = service.doLogin(username, password); /** * ModelMap map 与 @SessionAttributes("user")配合使用,将user放进session中 */ map.put("user", user); } catch (Exception e) { request.setAttribute("error", e.getMessage()); return "/WEB-INF/jsp/login.jsp"; } return "/WEB-INF/jsp/loginsuccess.jsp"; } @RequestMapping("doLogout") public String doLogout(SessionStatus status){ status.setComplete();//清空session中的内容 return "/WEB-INF/jsp/login.jsp"; }}
Service
具体业务逻辑交由service处理
@Servicepublic class UserService { @Resource UserDao dao ; public User doLogin(String username, String passwrod) throws Exception { if (username == null || "".equals(username)) { throw new Exception("用户名不能为空"); } if (passwrod == null || "".equals(passwrod)) { throw new Exception("密码不能为空"); } User user = dao.selectByUsername(username); if (user == null) { throw new Exception("用户名不存在"); } if (!user.getPassword().equals(passwrod)) { throw new Exception("密码错误"); } return user ; }}
数据处理层
@Repositorypublic class UserDao { public User selectByUsername(String username) { // admin if ("admin".equals(username)) { User user = new User(); user.setPassword("123"); user.setUsername("admin"); return user; } return null; }}
0 0
- Sping MVC 入门
- sping web mvc快速入门 三篇
- sping mvc
- sping mvc
- sping mvc
- Sping-MVC
- sping mvc
- Sping MVC用@ResponseBody返回json入门实例
- Sping MVC的配置
- sping mvc mail
- Sping MVC的配置
- 9Sping MVC注解
- Sping MVC知识点总结
- 简单模拟Sping MVC
- 学习Sping MVC模式
- 简单模拟Sping MVC
- sping mvc @RequestBody 415
- Sping MVC Controller注解优化
- react:undefined is not a function(this.State({flag:true,}))
- Android系统启动过程详解
- 大端与小端
- Getting this error message: dbModel read resource does not implement Zend_Db_Adapter_Abstract
- __thread
- Sping MVC 入门
- Html5 css reset
- Java中的ReentrantLock和synchronized两种锁定机制的对比
- MFC写入文件的尴尬——让ofstream流行起来
- pthread_key_create函数
- servlet是线程安全的吗
- weblogic问题整理
- jquery mobile 入门5 (预加载与缓存页面)
- 软工大作业·源物语(一)