昨天介紹了mybatis與spring的整合,今天我們完成剩下的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,為springmvc提供集中訪問點,springmvc對頁面的分派與調度功能主要靠它完成。
在我們之前配置的web.xml中加入以下springmvc的配置:
web.xml
1 <!-- Spring MVC 核心控制器 DispatcherServlet 配置 --> 2 <servlet> 3 <servlet-name>dispatcher</servlet-name> 4 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 5 <init-param> 6 <!--用於標明spring-mvc.xml配置的位置,我是存放在config文件夾下--> 7 <param-name>contextConfigLocation</param-name> 8 <param-value>classpath*:config/spring-mvc.xml</param-value> 9 </init-param> 10 <load-on-startup>1</load-on-startup> 11 </servlet> 12 <servlet-mapping> 13 <servlet-name>dispatcher</servlet-name> 14 <!-- 攔截所有*.do 的請求,交給DispatcherServlet處理,性能最好 --> 15 <url-pattern>*.do</url-pattern> 16 </servlet-mapping> 17 <!--用於設定默認首頁--> 18 <welcome-file-list> 19 <welcome-file>login.jsp</welcome-file> 20 </welcome-file-list>
配置完后,我們需要在對springmvc框架進行配置,配置文件名為spring-mvc.xml,也是存放在config文件夾下:
1 <beans xmlns="http://www.springframework.org/schema/beans" 2 xmlns:context="http://www.springframework.org/schema/context" 3 xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xsi:schemaLocation=" 5 http://www.springframework.org/schema/beans 6 http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 7 http://www.springframework.org/schema/context 8 http://www.springframework.org/schema/context/spring-context-3.0.xsd 9 http://www.springframework.org/schema/mvc 10 http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> 11 12 <!--掃描控制器,當配置了它后,Spring會自動的到com.mjl.controller 13 下掃描帶有@controller @service @component等注解等類,將他們自動實例化--> 14 <context:component-scan base-package="com.mjl.controller" /> 15 16 <!--<mvc:annotation-driven /> 會自動注冊DefaultAnnotationHandlerMapping與 17 AnnotationMethodHandlerAdapter 兩個bean,它解決了一些@controllerz注解使用時的提前配置--> 18 <mvc:annotation-driven /> 19 20 <!--配置 頁面控制器--> 21 <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 22 <property name="prefix" value="/"/> 23 <property name="suffix" value=".jsp" /> 24 25 </bean> 26 27 </beans>
當springmvc配置完成后,就需要編寫業務啦,也就是service包下的東西,首先編寫一個接口類userservice,里面存放了我們抽象出來的登錄方法login
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); }
然后在創建一個userservice的實現類userserviceimpl用於實現我們所抽象出來的登錄方法
1 package com.mjl.service; 2 3 import com.mjl.dao.IUserDao; 4 import com.mjl.model.User; 5 import org.springframework.beans.factory.annotation.Autowired; 6 import org.springframework.context.annotation.Scope; 7 import org.springframework.stereotype.Service; 8 import org.springframework.ui.Model; 9 10 /** 11 * Created by alvin on 15/9/7. 12 */ 13 //@Service("UserService") 注解用於標示此類為業務層組件,在使用時會被注解的類會自動由 14 //spring進行注入,無需我們創建實例 15 @Service("UserService") 16 public class UserServiceImpl implements UserService { 17 //自動注入iuserdao 用於訪問數據庫 18 @Autowired 19 IUserDao Mapper; 20 21 //登錄方法的實現,從jsp頁面獲取username與password 22 public boolean login(String username, String password) { 23 // System.out.println("輸入的賬號:" + username + "輸入的密碼:" + password); 24 //對輸入賬號進行查詢,取出數據庫中保存對信息 25 User user = Mapper.selectByName(username); 26 if (user != null) { 27 // System.out.println("查詢出來的賬號:" + user.getUsername() + "密碼:" + user.getPassword()); 28 // System.out.println("---------"); 29 if (user.getUsername().equals(username) && user.getPassword().equals(password)) 30 return true; 31 32 } 33 return false; 34 35 } 36 }
編寫完業務層代碼后,我們就可以寫控制層代碼啦,控制層的代碼用於處理頁面提交的業務
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注解用於標示本類為web層控制組件 @Controller //@RequestMapping("/user")用於標定訪問時對url位置 @RequestMapping("/user") //在默認情況下springmvc的實例都是單例模式,所以使用scope域將其注解為每次都創建一個新的實例 @Scope("prototype") public class UserController { //自動注入業務層的userService類 @Autowired UserService userService; //login業務的訪問位置為/user/login @RequestMapping("/login") public String login(User user,HttpServletRequest request){ //調用login方法來驗證是否是注冊用戶 boolean loginType = userService.login(user.getUsername(),user.getPassword()); if(loginType){ //如果驗證通過,則將用戶信息傳到前台 request.setAttribute("user",user); //並跳轉到success.jsp頁面 return "success"; }else{ //若不對,則將錯誤信息顯示到錯誤頁面 request.setAttribute("message","用戶名密碼錯誤"); return "error"; } } }
控制層代碼寫完后,就可以進行前端頁面代碼編寫了,登錄代碼
1 <%-- 2 Created by IntelliJ IDEA. 3 User: alvin 4 Date: 15/9/7 5 Time: 下午10:05 6 To change this template use File | Settings | File Templates. 7 --%> 8 <%@ page contentType="text/html;charset=UTF-8" language="java" %> 9 <% 10 String path = request.getContextPath(); 11 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 12 %> 13 <html> 14 <head> 15 <title></title> 16 </head> 17 <body> 18 <br> 19 <br> 20 <br> 21 <br> 22 <br> 23 <form name="form1" action="/user/login.do" method="post" > 24 <table width="300" border="1" align="center"> 25 <tr> 26 <td colspan="2">登入窗口</td> 27 </tr> 28 <tr> 29 <td>用戶名:</td> 30 <td><input type="text" name="username"> 31 </td> 32 </tr> 33 <tr> 34 <td>密碼:</td> 35 <td><input type="password" name="password"/> 36 </td> 37 </tr> 38 <tr> 39 <td colspan="2"> 40 <input type="submit" name="submit" value="登錄"/> 41 </td> 42 43 44 </tr> 45 </table> 46 </form> 47 </body> 48 </html>
登入成功代碼
1 <%-- 2 Created by IntelliJ IDEA. 3 User: alvin 4 Date: 15/9/8 5 Time: 下午6:21 6 To change this template use File | Settings | File Templates. 7 --%> 8 <%@ page contentType="text/html;charset=UTF-8" language="java" %> 9 <% 10 String path = request.getContextPath(); 11 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 12 %> 13 <html> 14 <head> 15 <title></title> 16 </head> 17 <body> 18 19 登入成功! 20 <br> 21 您好!${user.username} 22 <br> 23 <a href="/login.jsp">返回</a> 24 </body> 25 </html>
登入失敗代碼
1 <%-- 2 Created by IntelliJ IDEA. 3 User: alvin 4 Date: 15/9/8 5 Time: 下午6:22 6 To change this template use File | Settings | File Templates. 7 --%> 8 <%@ page contentType="text/html;charset=UTF-8" language="java" %> 9 <% 10 String path = request.getContextPath(); 11 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 12 %> 13 <html> 14 <head> 15 <title></title> 16 </head> 17 <body> 18 登入失敗! 19 ${message} 20 <br> 21 <a href="<%=path%>/login.jsp">返回</a> 22 </body> 23 </html>
OK,已經大功告成,跑一遍看看能不能使用吧
若我輸入用戶名:1234 密碼:1234 則會提示登錄失敗,如下圖所示:
到這里,本文已經全部結束,希望能對在整合springmvc,spring,my baits框架時有困惑的同學有所幫助,本文的代碼已經上傳github,地址為:http://git@github.com:alvin-mei/testssm.git 以后我也會慢慢的增加功能,也會上傳相關代碼,希望大家能夠共同進步!