用ssm框架分页查询教师表的教师

好的，您可以参考下面的代码实现：

1. 在Mapper.xml文件中定义查询语句：

<select id="findTeachersByPage" resultMap="teacherMap">
    select * from teacher
    <where>
        <if test="teacherName != null and teacherName != ''">
            and teacher_name like concat('%', #{teacherName}, '%')
        </if>
        <if test="subject != null and subject != ''">
            and subject = #{subject}
        </if>
    </where>
    order by id desc
    limit #{start}, #{pageSize}
</select>

2. 在Dao层中定义方法：

public List<Teacher> findTeachersByPage(int start, int pageSize, String teacherName, String subject);

3. 在Service层中调用Dao层方法，并进行分页处理：

int totalCount = teacherDao.getTotalCount(teacherName, subject);  // 获取总记录数
int totalPage = (totalCount % pageSize == 0) ? (totalCount / pageSize) : (totalCount / pageSize + 1);  // 计算总页数
List<Teacher> teachers = teacherDao.findTeachersByPage(start, pageSize, teacherName, subject);  // 获取当前页的数据
PageBean pageBean = new PageBean(currentPage, pageSize, totalCount, totalPage, teachers);  // 封装分页数据
return pageBean;

4. 在Controller层中获取请求参数，并调用Service层方法：

@RequestMapping("/findTeachersByPage")
public String findTeachersByPage(@RequestParam(defaultValue = "1") int currentPage, String teacherName, String subject, Model model) {
    int pageSize = 10;  // 每页显示的记录数
    int start = (currentPage - 1) * pageSize;  // 当前页的起始记录索引
    PageBean pageBean = teacherService.findTeachersByPage(start, pageSize, teacherName, subject);  // 获取分页数据
    model.addAttribute("pageBean", pageBean);
    model.addAttribute("teacherName", teacherName);
    model.addAttribute("subject", subject);
    return "teacherList";
}

其中，PageBean是一个自定义的分页实体类，用于封装分页数据。