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在应用 PageHelper 分页插件时要先增加 PageHelper 依赖
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper-spring-boot-starter</artifactId>
<version>1.3.1</version>
</dependency>
PageHelper 类调用父类的 startPage() 办法并传参,获取 Page 对象。能够通过此对象取得总记录数。
Page 对象外部的属性:
public class Page<E> extends ArrayList<E> implements Closeable {
private static final long serialVersionUID = 1L;
private int pageNum;
private int pageSize;
private long startRow;
private long endRow;
private long total;
private int pages;
private boolean count;
private Boolean reasonable;
private Boolean pageSizeZero;
private String countColumn;
private String orderBy;
private boolean orderByOnly;
private BoundSqlInterceptor boundSqlInterceptor;
private transient Chain chain;
PageHelper 分页插件具体应用如下:
@Service
public class SysUserServiceImpl implements SysUserService {
@Autowired
private SysUserDao sysUserDao;
@Override
public PageObject<SysUser> findPageObjects(String username, Integer pageCurrent) {
int pageSize = 5;
Page<Object> page = PageHelper.startPage(pageCurrent, pageSize);
List<SysUser>records=sysUserDao.findPageObjects(username);
long rowCount= page.getTotal();
return new PageObject<>((int)rowCount,records,pageCurrent,pageSize);
}
}
问题剖析:
在 springboot 我的项目中引入
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>5.2.0</version>
</dependency>
发现分页没失效
解决办法:发现 SpringBoot 我的项目依赖的分页插件和 Spring 我的项目有所不同,须要 spring-boot-starter 下的包才能够。
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