昨天介绍了mybatis与spring的整合,今天我们完成剩下的springmvc的整合工作。
要整合springmvc首先得在web.xml中配置springmvc的前端控制器DispatcherServlet,它是springmvc的核心,为springmvc提供集中访问点,springmvc对页面的分派与调度功能主要靠它完成。
在我们之前配置的web.xml中加入以下springmvc的配置:
web.xml
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<!-- Spring MVC 核心控制器 DispatcherServlet 配置 --> < servlet > < servlet-name >dispatcher</ servlet-name > < servlet-class >org.springframework.web.servlet.DispatcherServlet</ servlet-class > < init-param > <!--用于标明spring-mvc.xml配置的位置,我是存放在config文件夹下--> < param-name >contextConfigLocation</ param-name > < param-value >classpath*:config/spring-mvc.xml</ param-value > </ init-param > < load-on-startup >1</ load-on-startup > </ servlet > < servlet-mapping > < servlet-name >dispatcher</ servlet-name > <!-- 拦截所有*.do 的请求,交给DispatcherServlet处理,性能最好 --> < url-pattern >*.do</ url-pattern > </ servlet-mapping > <!--用于设定默认首页--> < welcome-file-list > < welcome-file >login.jsp</ welcome-file > </ welcome-file-list > |
配置完后,我们需要在对springmvc框架进行配置,配置文件名为spring-mvc.xml,也是存放在config文件夹下:
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< beans xmlns = "http://www.springframework.org/schema/beans" xmlns:context = "http://www.springframework.org/schema/context" xmlns:mvc = "http://www.springframework.org/schema/mvc" xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> <!--扫描控制器,当配置了它后,Spring会自动的到com.mjl.controller 下扫描带有@controller @service @component等注解等类,将他们自动实例化--> < context:component-scan base-package = "com.mjl.controller" /> <!--<mvc:annotation-driven /> 会自动注册DefaultAnnotationHandlerMapping与 AnnotationMethodHandlerAdapter 两个bean,它解决了一些@controllerz注解使用时的提前配置--> < mvc:annotation-driven /> <!--配置 页面控制器--> < bean class = "org.springframework.web.servlet.view.InternalResourceViewResolver" > < property name = "prefix" value = "/" /> < property name = "suffix" value = ".jsp" /> </ bean > </ beans > |
当springmvc配置完成后,就需要编写业务啦,也就是service包下的东西,首先编写一个接口类userservice,里面存放了我们抽象出来的登录方法login
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package com.mjl.service; import org.springframework.ui.Model; /** * Created by alvin on 15/9/7. */ public interface UserService { public boolean login(String username,String password); } |
然后在创建一个userservice的实现类userserviceimpl用于实现我们所抽象出来的登录方法
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package com.mjl.service; import com.mjl.dao.IUserDao; import com.mjl.model.User; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Scope; import org.springframework.stereotype.Service; import org.springframework.ui.Model; /** * Created by alvin on 15/9/7. */ //@Service("UserService") 注解用于标示此类为业务层组件,在使用时会被注解的类会自动由 //spring进行注入,无需我们创建实例 @Service ( "UserService" ) public class UserServiceImpl implements UserService { //自动注入iuserdao 用于访问数据库 @Autowired IUserDao Mapper; //登录方法的实现,从jsp页面获取username与password public boolean login(String username, String password) { // System.out.println("输入的账号:" + username + "输入的密码:" + password); //对输入账号进行查询,取出数据库中保存对信息 User user = Mapper.selectByName(username); if (user != null ) { // System.out.println("查询出来的账号:" + user.getUsername() + "密码:" + user.getPassword()); // System.out.println("---------"); if (user.getUsername().equals(username) && user.getPassword().equals(password)) return true ; } return false ; } } |
编写完业务层代码后,我们就可以写控制层代码啦,控制层的代码用于处理页面提交的业务
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package com.mjl.controller; import com.mjl.model.User; import com.mjl.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Scope; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import javax.servlet.http.HttpServletRequest; /** * Created by alvin on 15/9/7. */ //@Controller注解用于标示本类为web层控制组件 @Controller //@RequestMapping("/user")用于标定访问时对url位置 @RequestMapping ( "/user" ) //在默认情况下springmvc的实例都是单例模式,所以使用scope域将其注解为每次都创建一个新的实例 @Scope ( "prototype" ) public class UserController { //自动注入业务层的userService类 @Autowired UserService userService; //login业务的访问位置为/user/login @RequestMapping ( "/login" ) public String login(User user,HttpServletRequest request){ //调用login方法来验证是否是注册用户 boolean loginType = userService.login(user.getUsername(),user.getPassword()); if (loginType){ //如果验证通过,则将用户信息传到前台 request.setAttribute( "user" ,user); //并跳转到success.jsp页面 return "success" ; } else { //若不对,则将错误信息显示到错误页面 request.setAttribute( "message" , "用户名密码错误" ); return "error" ; } } } |
控制层代码写完后,就可以进行前端页面代码编写了,登录代码
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<%-- Created by IntelliJ IDEA. User: alvin Date: 15/9/7 Time: 下午10:05 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> < html > < head > < title ></ title > </ head > < body > < br > < br > < br > < br > < br > < form name = "form1" action = "/user/login.do" method = "post" > < table width = "300" border = "1" align = "center" > < tr > < td colspan = "2" >登入窗口</ td > </ tr > < tr > < td >用户名:</ td > < td >< input type = "text" name = "username" > </ td > </ tr > < tr > < td >密码:</ td > < td >< input type = "password" name = "password" /> </ td > </ tr > < tr > < td colspan = "2" > < input type = "submit" name = "submit" value = "登录" /> </ td > </ tr > </ table > </ form > </ body > </ html > |
登入成功代码
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<%-- Created by IntelliJ IDEA. User: alvin Date: 15/9/8 Time: 下午6:21 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> < html > < head > < title ></ title > </ head > < body > 登入成功! < br > 您好!${user.username} < br > < a href = "/login.jsp" rel = "external nofollow" >返回</ a > </ body > </ html > |
登入失败代码
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<%-- Created by IntelliJ IDEA. User: alvin Date: 15/9/8 Time: 下午6:22 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> < html > < head > < title ></ title > </ head > < body > 登入失败! ${message} < br > < a href="<%=path%>/login.jsp" rel="external nofollow" >返回</ a > </ body > </ html > |
OK,已经大功告成,跑一遍看看能不能使用吧
若我输入用户名:1234 密码:1234 则会提示登录失败,如下图所示:
到这里,本文已经全部结束,希望能对在整合springmvc,spring,my baits框架时有困惑的同学有所帮助,本文的代码已经上传github,以后我也会慢慢的增加功能,也会上传相关代码,希望大家能够共同进步!
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。