PageHelper是一款非常好用的分頁插件，它和Mybatis工作在一起，可以大幅提升開發(fā)效率。PageHelper是通過Mybatis的攔截器插件原理實現(xiàn)的。

1. pom.xml配置

在我們的Spring Boot工程中增加PageHelper的配置，請記住PageHelper是和Mybatis工作在一起的，因此務(wù)必要引入Mybatis的jar包。

    <dependency>
        <groupId>com.github.pagehelper</groupId>
        <artifactId>pagehelper</artifactId>
        <version>4.1.6</version>
    </dependency>
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>1.1.1</version>
    </dependency>

2. 向Spring容器中注入PageHelper

@Configuration
public class PageHelperConfiguration {
    private static final Logger log = LoggerFactory.getLogger(PageHelperConfiguration.class);
    @Bean
    public PageHelper pageHelper() {
        log.info("------Register MyBatis PageHelper");
        PageHelper pageHelper = new PageHelper();
        Properties p = new Properties();
        p.setProperty("offsetAsPageNum", "true");
        p.setProperty("rowBoundsWithCount", "true");
        p.setProperty("reasonable", "true");
        //通過設(shè)置pageSize=0或者RowBounds.limit = 0就會查詢出全部的結(jié)果。
        p.setProperty("pageSizeZero", "true");
        pageHelper.setProperties(p);
        return pageHelper;
    }
}

3. 在代碼中使用PageHelper

@RestController
@RequestMapping("/user")
public class UserController {
    
    @Autowired
    UserMapper userMapper;
    
    @RequestMapping(value = "/queryall.do", method = RequestMethod.GET)
    public PageInfo<User> queryAll( @RequestParam(value = "pageNum", required = false, defaultValue="1") Integer pageNum,
            @RequestParam(value = "pageSize", required = false, defaultValue="10") Integer pageSize) {
        PageHelper.startPage(pageNum, pageSize);
        List<User> list = userMapper.selectAllUsers();
        PageInfo<User> pageInfo = new PageInfo<User>(list);
        return  pageInfo;
    }

}

其余代碼請參考：http://www.itdecent.cn/p/9e8a7c07c60b

Mybatis分頁插件PageHelper官網(wǎng)：https://github.com/pagehelper/Mybatis-PageHelper
Mybatis之插件原理：[http://blog.csdn.net/hupanfeng/article/details/9247379]