扩展：构建ssm项目，使用ajax请求实现layui单表的查询和添加

在这个问题中，我们将使用Spring、Spring MVC和MyBatis（SSM）框架来构建一个简单的Web应用程序，并使用Ajax请求与Layui表格进行交互。我们将实现表格的查询和添加功能。

1. 首先，你需要在你的项目中包含以下依赖（在你的pom.xml文件中）:

<!-- Spring -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>Your Spring Version</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>Your Spring Version</version>
</dependency>
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>Your MyBatis Spring Version</version>
</dependency>
<!-- 数据库驱动，以下以MySQL为例 -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>Your MySQL Connector Version</version>
</dependency>
<dependency>
    <groupId>com.mchange</groupId>
    <artifactId>c3p0</artifactId>
    <version>Your c3p0 Version</version>
</dependency>

2. 配置Spring和MyBatis:

<!-- 数据源配置 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
    <property name="driverClass" value="Your Driver Class"/>
    <property name="jdbcUrl" value="Your JDBC URL"/>
    <property name="user" value="Your DB User"/>
    <property name="password" value="Your DB Password"/>
</bean>
 
<!-- 配置SqlSessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="mapperLocations" value="classpath:mapper/*.xml"/>
</bean>
 
<!-- 配置Mapper接口扫描器 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="Your Mapper Package"/>
</bean>

3. 创建对应的Mapper接口和XML文件。
4. 创建Controller层处理请求:

@Controller
public class YourController {
 
    @Autowired
    private YourService yourService;
 
    @RequestMapping("/getData")
    @ResponseBody
    public LayuiTableData<YourModel> getData(@RequestParam(defaultValue = "1") int page,
                                             @RequestParam(defaultValue = "10") int limit,
                                             YourModel queryCondition) {
        // 使用Service查询数据
        LayuiTableData<YourModel> data = yourService.queryData(page, limit, qu