sprinboot 分页

1. pom.xml配置

<dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>4.1.1</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

import com.github.pagehelper.PageHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.Properties;
@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");
        //通过设置pageSize=0或者RowBounds.limit = 0就会查询出全部的结果。
        p.setProperty("pageSizeZero", "true");
        pageHelper.setProperties(p);
        return pageHelper;
    }
}

3. 在代码中使用PageHelper

@RestController
@RequestMapping("zz")
public class StuController {
    @Autowired
    StuService stuService;  

 //没写死
    @RequestMapping("/query/{page}/{pageSize}")
    public PageInfo query(@PathVariable Integer page, @PathVariable Integer pageSize) {
        if(page!= null && pageSize!= null){
            PageHelper.startPage(page, pageSize);
        }
        List<Student> users = stuService.list();
        return new PageInfo(users);
    }
    
    //写死了
    @RequestMapping(value = "users2", method = RequestMethod.GET)
    public PageInfo<Student> queryAll( @RequestParam(value = "pageNum", required = false, defaultValue="1") Integer pageNum,
                                    @RequestParam(value = "pageSize", required = false, defaultValue="6") Integer pageSize) {
        PageHelper.startPage(pageNum, pageSize);
        List<Student> list = stuService.list();
        PageInfo<Student> pageInfo = new PageInfo<Student>(list);
        return  pageInfo;
    }

ps:

public interface StuService {
    Student selectByPrimaryKey(Integer id);
    List<Student> list();  // 代码由mybatis逆向工程自动生成.
  
}

访问验证

http://localhost:8788/zz/query/1/3

图片.png