流程

1，maven 依赖

2，在 mybatis 配置文件启用插件

3，修改 service 层

依赖

<!-- https://mvnrepository.com/artifact/com.github.pagehelper/pagehelper -->
<dependency>
    <groupId>com.github.pagehelper</groupId>
    <artifactId>pagehelper</artifactId>
    <version>5.1.2</version>
</dependency>

启用插件

<plugins>
    <plugin interceptor="com.github.pagehelper.PageInterceptor">
        <property name="helperDialect" value="mysql" />
    </plugin>
</plugins>

service 层代码示例

@Service("accountService")
public class AccountServiceImpl implements IAccountService {
    @Autowired
    private AccountMapper am;

    @Override
    public PageInfo<Account> selectBySearch(Account record, String startDate, String endDate, String companyName,
            Integer currentPage, Integer pageSize) {
        
        // 如果没有传递分页属性值，默认第一页，每页10条数据
        if(currentPage == null) {
            currentPage = 1;
        }
        if(pageSize == null) {
            pageSize = 10;
        }
        
        // 这是关键，设置分页属性
        PageHelper.startPage(currentPage, pageSize);
        
        // 和 mapper 接口文件中的方法一致
        List<Account> list = am.selectBySearch(record, startDate, endDate, companyName);
        
        // 分页成功，返回
        PageInfo<Account> pageInfo = new PageInfo<>(list);
        return pageInfo;
    }
}