Spring MVC第一课：用IDEA构建一个基于Spring MVC, Hibernate, My SQL的Maven项目

作为一个Spring MVC新手最基本的功夫就是学会如何使用开发工具创建一个完整的Spring MVC项目，本文站在一个新手的角度讲述如何一步一步创建一个基于Spring MVC, Hibernate, My SQL的Maven项目。

本项目的目的：

• 学习如何创建并配置一个基于maven的Spring MVC项目
• 学习如何映射数据表到对象
• 学习如何使用Hibernate操纵数据库数据
• 学习如何使用拦截器过滤未授权的访问

因为在使用不同的IDEA 版本、不同的Spring MVC版本或者不同Hibernate版本创建项目的时候创建方式和配置都有可能一些不一样，下面列出本文所使用的各个组件的版本，如果你所使用的版本和我的不一样，请灵活做出改变～

• JDK: 1.8
• IDEA Ultimate: 2016
• Spring MVC: 4.3.3
• Hibernate: 5.2.3

创建一个基于Maven的Webapp项目

• 新建一个项目：Maven -> Create from archetype -> org.apache.maven.archetypes:maven-archetype-webapp

注意别一不小心选择了org.apche.cocoon:cocoon-22-archetype-webapp

• 下一步主要是需要输入项目的GroupId和ArtifactId，比较简单就不上图了。
• 下下一步也没有什么特别要设置的，可以直接再下一步。

• 点击完成后需要稍微等一下，因为要根据Webapp框架下载一些依赖包和创建项目索引，耐心等个一两分钟，一个基础的Webapp项目就创建好了。

新建一个运行配置

• Running -> Edit Configurations...

• 在Deployment选项卡里添加一个Artifacts：

• 全部的运行配置如下：

配置好了之后，点击那个三角按钮运行，哈哈～Hello World! 出来了。

至此一个基本的web项目已经创建好并可以运行。

创建数据库

在这里我使用的是My SQL数据库，只创建一个表用于存放用户信息，里面只有三个字段：

CREATE DATABASE demo;
USE demo;
CREATE TABLE user_info
(
    id INT(11) PRIMARY KEY NOT NULL AUTO_INCREMENT,
    user_name VARCHAR(100) NOT NULL,
    password VARCHAR(100) NOT NULL
);
CREATE UNIQUE INDEX table_name_id_uindex ON user_info (id);
INSERT INTO user_info (user_name, password) VALUES ("admin", "admin"); 

创建Spring MVC目录结构

打开Project Structure，创建如下图红框内的文件夹：

• java: 标记为Sources（从颜色可看出与其他文件夹的区别）
• controller: 控制器代码，主要是提供web接口。
• dao: 数据访问对象代码，用于操纵数据库。
• entity: 实体类代码，对应数据库表的映射。
• interceptor: 拦截器代码，比如可用用来拦截未经验证的请求。
• service: 业务层代码
• utils: 工具类代码

配置文件

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.example</groupId>
    <artifactId>maven-springmvc-hibernate-mysql-demo</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>maven-springmvc-hibernate-mysql-demo Maven Webapp</name>
    <url>http://maven.apache.org</url>

    <dependencies>
        <!-- Spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.3.2.release</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.3.2.release</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>4.3.2.release</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>4.3.2.RELEASE</version>
        </dependency>
        <!-- Hibernate -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>5.2.3.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>5.2.3.Final</version>
        </dependency>
        <!-- unit test -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <!-- log -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.6.1</version>
        </dependency>
        <!-- jstl -->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!-- Apache Commons DBCP -->
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>
        <!-- tomcat servlet api -->
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-servlet-api</artifactId>
            <version>7.0.53</version>
            <scope>provided</scope>
        </dependency>
        <!-- MySql 5.5 Connector -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>6.0.4</version>
        </dependency>
    </dependencies>

    <build>
        <finalName>maven-springmvc-hibernate-mysql-demo</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <!--JDK version-->
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

添加好pom文件后，点击刷新，过程中需要在线下载一些依赖包和创建索引，这中间可能需要等待较长时间，可以去泡杯茶喝先了。因为国内连接国外的Maven仓库超级不稳定，如果下载失败，请自行查找可用的Maven仓库并添加到Maven的settings.xml文件（推荐阿里云的仓库）。

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
          http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0">

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/applicationContext.xml</param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

</web-app>

添加配置文件：WEB-INF/applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xmlns:beans="http://www.springframework.org/schema/beans"
             xmlns:context="http://www.springframework.org/schema/context"
             xmlns:tx="http://www.springframework.org/schema/tx"
             xmlns:mvc="http://www.springframework.org/schema/mvc"
             xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">

    <annotation-driven/>
    <context:component-scan base-package="com.demo.controller"/>
    <tx:annotation-driven transaction-manager="transactionManager"/>

    <beans:bean
            class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <beans:property name="prefix" value="/WEB-INF/views/"/>
    </beans:bean>

    <beans:bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
                destroy-method="close">
        <beans:property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <beans:property name="url"
                        value="jdbc:mysql://localhost:3306/demo"/>
        <beans:property name="username" value="root"/>
        <beans:property name="password" value="xxx"/>
    </beans:bean>

    <!-- Hibernate 5 SessionFactory Bean definition -->
    <beans:bean id="hibernate5AnnotatedSessionFactory"
                class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
        <beans:property name="dataSource" ref="dataSource"/>
        <beans:property name="annotatedClasses">
            <beans:list>
                <beans:value>com.demo.entity.UserInfoEntity</beans:value>
            </beans:list>
        </beans:property>
        <beans:property name="hibernateProperties">
            <beans:props>
                <beans:prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect
                </beans:prop>
                <beans:prop key="hibernate.show_sql">true</beans:prop>
            </beans:props>
        </beans:property>
    </beans:bean>

    <beans:bean id="userInfoDao" class="com.demo.dao.UserInfoDaoImpl">
        <beans:property name="sessionFactory" ref="hibernate5AnnotatedSessionFactory"/>
    </beans:bean>

    <beans:bean id="userInfoService" class="com.demo.service.UserInfoServiceImpl">
        <beans:property name="userInfoDao" ref="userInfoDao"></beans:property>
    </beans:bean>

    <beans:bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
        <beans:property name="sessionFactory" ref="hibernate5AnnotatedSessionFactory"/>
    </beans:bean>

    <mvc:interceptors>
        <mvc:interceptor>
            <mvc:mapping path="/index"/>
            <mvc:mapping path="/user/**"/>
            <beans:bean class="com.demo.interceptor.LoginInterceptor"/>
        </mvc:interceptor>
    </mvc:interceptors>

</beans:beans>

需改bean "dataSource" 中的My SQL配置，把IP、用户名、密码修改为你相应的值。

添加配置文件：WEB-INF/dispatcher-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       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.xsd">

</beans>

前端文件

1. 把系统自动生成的index.jsp删除掉。
2. 在/webapp/WEB-INF下创建views文件夹，然后分别创建一下两个文件：

login.jsp

<%--
  User: keitsi
  Date: 16-10-22
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>User Login</title>
</head>
<body>
<form action="/authenticate" method="post">
    <div>
        <label for="user_name">User Name: </label>
        <input id="user_name" name="userName" type="text">
    </div>
    <div>
        <label for="password">Password: </label>
        <input id="password" name="password" type="password">
    </div>
    <div>
        <input type="submit" value="submit">
    </div>
    <p style="color: red;"><%=request.getParameter("errorMessage") == null ? "" : request.getParameter("errorMessage")%>
    </p>
</form>
</body>
</html>

user_list.jsp

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ page session="false" %>
<html>
<head>
    <title>User Page</title>
    <style type="text/css">
        .tg {
            border-collapse: collapse;
            border-spacing: 0;
            border-color: #ccc;
        }

        .tg td {
            padding: 10px 5px;
            border: solid 1px #ccc;
            text-align: center;
        }

        .tg th {
            border: solid 1px #ccc;
            background-color: #f0f0f0;
            padding: 10px 5px;
        }
    </style>
</head>
<body>
<h3>Hello ${LoginUser.userName} <a href="/user/logout">Logout</a></h3>

<br>

<h3>
    Modify User
</h3>

<c:url var="addAction" value="/user/modify"></c:url>

<form action="${addAction}" method="post">
    <table>
        <c:if test="${!empty user.userName}">
            <tr>
                <td>
                    <label for="id">ID: </label>
                </td>
                <td>
                    <input id="id" name="id" value="${user.id}">
                </td>
            </tr>
        </c:if>
        <tr>
            <td>
                <label for="user_name">User Name: </label>
            </td>
            <td>
                <input id="user_name" name="userName" value="${user.userName}">
            </td>
        </tr>
        <tr>
            <td>
                <label for="password">Password: </label>
            </td>
            <td>
                <input id="password" name="password" value="${user.password}">
            </td>
        </tr>
        <tr>
            <td colspan="2">
                <c:if test="${!empty user.userName}">
                    <input type="submit" value="Edit Person"/>
                </c:if>
                <c:if test="${empty user.userName}">
                    <input type="submit" value="Add Person"/>
                </c:if>
            </td>
        </tr>
    </table>
</form>

<br>

<h3>User List</h3>
<c:if test="${!empty allUsers}">
    <table class="tg">
        <tr>
            <th width="80">User ID</th>
            <th width="120">User Name</th>
            <th width="120">Password</th>
            <th width="60">Edit</th>
            <th width="60">Delete</th>
        </tr>
        <c:forEach items="${allUsers}" var="user">
            <tr>
                <td>${user.id}</td>
                <td>${user.userName}</td>
                <td>${user.password}</td>
                <td><a href="<c:url value='/user/edit/${user.id}' />">Edit</a></td>
                <td><a href="<c:url value='/user/remove/${user.id}' />">Delete</a></td>
            </tr>
        </c:forEach>
    </table>
</c:if>
</body>
</html>

数据库访问层

entity/UserInfoEntity.java

package com.demo.entity;

import javax.persistence.*;

/**
 * Created by keitsi on 16-10-21.
 */
@Entity
@Table(name = "user_info", schema = "demo")
public class UserInfoEntity {
    private int id;
    private String userName;
    private String password;

    @Id
    @Column(name = "id")
    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    @Basic
    @Column(name = "user_name")
    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    @Basic
    @Column(name = "password")
    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        UserInfoEntity that = (UserInfoEntity) o;

        if (id != that.id) return false;
        if (userName != null ? !userName.equals(that.userName) : that.userName != null) return false;
        if (password != null ? !password.equals(that.password) : that.password != null) return false;

        return true;
    }

    @Override
    public int hashCode() {
        int result = id;
        result = 31 * result + (userName != null ? userName.hashCode() : 0);
        result = 31 * result + (password != null ? password.hashCode() : 0);
        return result;
    }
}

dao/UserInfoDao.java

package com.demo.dao;

/**
 * Created by keitsi on 16-10-21.
 */

import com.demo.entity.UserInfoEntity;

import java.util.List;

public interface UserInfoDao {

    void add(UserInfoEntity p);

    void update(UserInfoEntity p);

    void remove(int id);

    List<UserInfoEntity> getAll();

    UserInfoEntity getById(int id);

    UserInfoEntity getByName(String name);

}

dao/UserInfoDaoImpl.java

package com.demo.dao;

/**
 * Created by keitsi on 16-10-21.
 */

import com.demo.entity.UserInfoEntity;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.query.Query;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Repository;

import java.util.List;

@Repository
public class UserInfoDaoImpl implements UserInfoDao {

    private static final Logger logger = LoggerFactory.getLogger(UserInfoDaoImpl.class);

    private SessionFactory sessionFactory;

    public void setSessionFactory(SessionFactory sf) {
        this.sessionFactory = sf;
    }

    public void add(UserInfoEntity user) {
        Session session = this.sessionFactory.getCurrentSession();
        session.persist(user);
        logger.info("Person saved successfully, Person Details=" + user);
    }

    public void update(UserInfoEntity user) {
        Session session = this.sessionFactory.getCurrentSession();
        session.update(user);
        logger.info("Person updated successfully, Person Details=" + user);
    }

    public void remove(int id) {
        Session session = this.sessionFactory.getCurrentSession();
        UserInfoEntity user = (UserInfoEntity) session.load(UserInfoEntity.class, new Integer(id));
        if (null != user) {
            session.delete(user);
        }
        logger.info("Person deleted successfully, person details=" + user);
    }

    @SuppressWarnings("unchecked")
    public List<UserInfoEntity> getAll() {
        Session session = this.sessionFactory.getCurrentSession();
        List<UserInfoEntity> userList = session.createQuery("from UserInfoEntity ").list();
        for (UserInfoEntity user : userList) {
            logger.info("Person List::" + user);
        }
        return userList;
    }

    public UserInfoEntity getById(int id)
    {
        Session session = this.sessionFactory.getCurrentSession();
        UserInfoEntity user = (UserInfoEntity) session.load(UserInfoEntity.class, new Integer(id));
        logger.info("Person loaded successfully, Person details=" + user);
        return user;
    }

    public UserInfoEntity getByName(String name){
        Session session = this.sessionFactory.getCurrentSession();
        Query query = session.createQuery("from UserInfoEntity where userName = :userName ");
        query.setParameter("userName", name);
        List list = query.list();
        if (list.size()>0){
            return (UserInfoEntity) list.get(0);
        }else {
            return null;
        }
    }

}

业务层代码

service/UserInfoService.java

package com.demo.service;

/**
 * Created by keitsi on 16-10-21.
 */

import com.demo.entity.UserInfoEntity;

import java.util.List;

public interface UserInfoService {

    void add(UserInfoEntity p);

    void update(UserInfoEntity p);

    void remove(int id);

    List<UserInfoEntity> getAll();

    UserInfoEntity getById(int id);

    UserInfoEntity getByName(String name);
}

service/UserInfoServiceImpl.java

package com.demo.service;

/**
 * Created by keitsi on 16-10-21.
 */

import com.demo.dao.UserInfoDao;
import com.demo.entity.UserInfoEntity;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.util.List;

@Service
public class UserInfoServiceImpl implements UserInfoService {

    @Resource
    private UserInfoDao userInfoDao;

    public void setUserInfoDao(UserInfoDao userInfoDao) {
        this.userInfoDao = userInfoDao;
    }

    @Transactional
    public void add(UserInfoEntity user) {
        this.userInfoDao.add(user);
    }

    @Transactional
    public void update(UserInfoEntity user) {
        this.userInfoDao.update(user);
    }

    @Transactional
    public void remove(int id) {
        this.userInfoDao.remove(id);
    }

    @Transactional
    public List<UserInfoEntity> getAll() {
        return this.userInfoDao.getAll();
    }

    @Transactional
    public UserInfoEntity getById(int id) {
        return this.userInfoDao.getById(id);
    }

    @Transactional
    public UserInfoEntity getByName(String name)
    {
        return this.userInfoDao.getByName(name);
    }

}

控制器层代码

controller/RootController.java

package com.demo.controller;

import com.demo.entity.UserInfoEntity;
import com.demo.service.UserInfoService;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Created by keitsi on 16-10-22.
 */
@Controller
@RequestMapping("")
public class RootController {
    @Resource
    private UserInfoService userService;

    @RequestMapping("")
    public String root() {
        return "redirect:/index";
    }

    @RequestMapping("/index")
    public String index() {
        return "redirect:/user/list.jsp";
    }

    @RequestMapping("/login")
    public String login() {
        return "/login.jsp";
    }

    @RequestMapping(value = "/authenticate", method = RequestMethod.POST)
    public void login(HttpServletRequest request, HttpServletResponse response, String userName, String password) throws Exception {
        UserInfoEntity user = userService.getByName(userName);
        if (user.getPassword().equals(password)) {
            request.getSession().setAttribute("LoginUser", user);
            response.sendRedirect(request.getContextPath() + "/user/list");
        } else {
            response.sendRedirect(request.getContextPath() + "/login?errorMessage=User name or password is not correct.");
        }
    }
}

controller/UserController.java

package com.demo.controller;

/**
 * Created by keitsi on 16-10-21.
 */

import com.demo.entity.UserInfoEntity;
import com.demo.service.UserInfoService;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Controller
@RequestMapping("/user")
public class UserController {
    @Resource
    private UserInfoService userService;

    @RequestMapping(value = "/list", method = RequestMethod.GET)
    public String listUsers(HttpServletRequest request, Model model) {
        UserInfoEntity loginUser = (UserInfoEntity)request.getSession().getAttribute("LoginUser");
        model.addAttribute("LoginUser", loginUser);
        model.addAttribute("user", new UserInfoEntity());
        model.addAttribute("allUsers", this.userService.getAll());
        return "/user_list.jsp";
    }

    @RequestMapping(value = "/logout", method = RequestMethod.GET)
    public void logout(HttpServletRequest request, HttpServletResponse response, String userName, String password) throws Exception {
        request.getSession().setAttribute("LoginUser", null);
        response.sendRedirect(request.getContextPath() + "/index");
    }

    //For add and update person both
    @RequestMapping(value = "/modify", method = RequestMethod.POST)
    public String addPerson(@ModelAttribute("user") UserInfoEntity user) {

        if (user.getId() == 0) {
            //new person, add it
            this.userService.add(user);
        } else {
            //existing person, call update
            this.userService.update(user);
        }
        return "redirect:/user/list";
    }

    @RequestMapping("/edit/{id}")
    public String editPerson(HttpServletRequest request, @PathVariable("id") int id, Model model) {
        UserInfoEntity loginUser = (UserInfoEntity)request.getSession().getAttribute("LoginUser");
        model.addAttribute("LoginUser", loginUser);
        model.addAttribute("user", this.userService.getById(id));
        model.addAttribute("allUsers", this.userService.getAll());
        return "/user_list.jsp";
    }

    @RequestMapping("/remove/{id}")
    public String removePerson(@PathVariable("id") int id) {
        this.userService.remove(id);
        return "redirect:/user/list";
    }

}

拦截器层代码

interceptor/LoginInterceptor.java

package com.demo.interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Created by keitsi on 16-10-22.
 */
public class LoginInterceptor implements HandlerInterceptor {
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        Object loginUser = request.getSession().getAttribute("LoginUser");
        if(loginUser == null){
            response.sendRedirect(request.getContextPath() + "/login");
            return false;
        }
        return loginUser != null;
    }

    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView)
            throws Exception {
    }

    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
    }
}

运行

点击运行，在启动tomcat的时候有可能会遇到如下图所示的运行异常：

严重: Error configuring application listener of class org.springframework.web.context.ContextLoaderListener
java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1891)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1734)
    at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:504)
    at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:486)

这是因为我们的打包的war包里面没有自动加入Spring MVC的jar包，所以只需要把依赖的jar包添加到输出目录即可：

File -> Project Structure... -> Artifacts

在Available Elements的根节点点击右键 -> Put into Out Root

再次点击运行，如果不出什么故障你就能看到下面的登录界面：

用户名和密码都是：admin

页面比较简单，因为没有加入太多的样式。

登录之后的界面：

是一个用户管理界面，覆盖了对数据库的：增、删、改、查

项目代码：https://github.com/keitsi/maven-springmvc-hibernate-mysql-demo

转载请注明出处：http://www.cnblogs.com/keitsi/p/5990479.html