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 >
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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 >
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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);
}
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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 ;
}
}
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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" ;
}
}
}
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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 >
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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 >
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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 >
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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。