写一个简单的ssm框架项目

好的，我可以为你提供一个简单的SSM框架项目的示例代码。

首先，需要创建一个Maven项目，然后在pom.xml文件中添加SSM框架的依赖：

<!-- Spring -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>5.1.8.RELEASE</version>
</dependency>

<!-- SpringMVC -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>5.1.8.RELEASE</version>
</dependency>

<!-- MyBatis -->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.5.3</version>
</dependency>

<!-- 数据库连接池 -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
    <version>1.1.16</version>
</dependency>

<!-- MySQL 驱动 -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.23</version>
</dependency>

然后，创建相关的Java类和配置文件。下面是一个简单的示例：

1. 数据库连接池的配置文件 `druid.properties`：

driverClassName=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/my_database?useUnicode=true&characterEncoding=utf-8&serverTimezone=UTC
username=root
password=123456
initialSize=5
maxActive=20
maxWait=60000

2. MyBatis的配置文件 `mybatis-config.xml`：

<configuration>
    <typeAliases>
        <package name="com.example.model"/>
    </typeAliases>
    <mappers>
        <mapper resource="com/example/mapper/UserMapper.xml"/>
    </mappers>
</configuration>

3. Spring的配置文件 `applicationContext.xml`：

<context:annotation-config/>

<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
    <property name="config" value="classpath:druid.properties"/>
</bean>

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="configLocation" value="classpath:mybatis-config.xml"/>
</bean>

<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
    <constructor-arg ref="sqlSessionFactory"/>
</bean>

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.example.mapper"/>
</bean>

<bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
    <property name="mapperInterface" value="com.example.mapper.UserMapper"/>
    <property name="sqlSession" ref="sqlSession"/>
</bean>

4. SpringMVC的配置文件 `spring-mvc.xml`：

<mvc:annotation-driven/>

<context:component-scan base-package="com.example.controller"/>

<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/views/"/>
    <property name="suffix" value=".jsp"/>
</bean>

5. 控制器类 `UserController.java`：

@Controller
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserMapper userMapper;

    @RequestMapping("/list")
    public String list(Model model) {
        List<User> userList = userMapper.findAll();
        model.addAttribute("userList", userList);
        return "user/list";
    }

    @RequestMapping("/add")
    public String add(User user) {
        userMapper.insert(user);
        return "redirect:/user/list";
    }

    @RequestMapping("/delete")
    public String delete(Long id) {
        userMapper.delete(id);
        return "redirect:/user/list";
    }

    @RequestMapping("/update")
    public String update(User user) {
        userMapper.update(user);
        return "redirect:/user/list";
    }
}

6. 数据库映射文件 `UserMapper.xml`：

<mapper namespace="com.example.mapper.UserMapper">

    <resultMap id="userMap" type="com.example.model.User">
        <id property="id" column="id"/>
        <result property="username" column="username"/>
        <result property="password" column="password"/>
        <result property="email" column="email"/>
        <result property="createTime" column="create_time"/>
    </resultMap>

    <select id="findAll" resultMap="userMap">
        select * from user
    </select>

    <select id="findById" resultMap="userMap">
        select * from user where id=#{id}
    </select>

    <insert id="insert">
        insert into user(username,password,email,create_time) values(#{username},#{password},#{email},#{createTime})
    </insert>

    <update id="update">
        update user set username=#{username},password=#{password},email=#{email} where id=#{id}
    </update>

    <delete id="delete">
        delete from user where id=#{id}
    </delete>

</mapper>

7. JSP页面 `list.jsp`：

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>用户列表</title>
</head>
<body>
<h1>用户列表</h1>
<table border="1">
    <tr>
        <th>ID</th>
        <th>用户名</th>
        <th>密码</th>
        <th>邮箱</th>
        <th>创建时间</th>
        <th>操作</th>
    </tr>
    <c:forEach items="${userList}" var="user">
        <tr>
            <td>${user.id}</td>
            <td>${user.username}</td>
            <td>${user.password}</td>
            <td>${user.email}</td>
            <td>${user.createTime}</td>
            <td>
                <a href="<c:url value='/user/delete'/>?id=${user.id}">删除</a>
                <a href="<c:url value='/user/update'/>?id=${user.id}">修改</a>
            </td>
        </tr>
    </c:forEach>
</table>
<br>
<a href="<c:url value='/user/add'/>">添加用户</a>
</body>
</html>

这个示例项目是一个简单的用户管理系统，可以进行用户的增删改查操作。当然，这只是一个简单的示例，实际的项目中可能会更加复杂，但是SSM框架可以提供一种快速搭建Java Web项目的方式，让开发变得更加高效。