springboot整合mybaits plus 实现分页操作

Posted 2022-12-15 健康平安的活着

一  说明

1.1 工程结构

 工程的搭建参考：springboot 整合mybaits实现crud操作(含分页)案例_健康平安的活着的博客-CSDN博客_springboot使用mybatis进行crud操作

1.2 分页的配置

1.pom的引入

    <!--- baomidou 分页pagetutils  -->
    <dependency>
      <groupId>com.baomidou</groupId>
      <artifactId>mybatis-plus</artifactId>
      <version>2.1.8</version>
    </dependency>
  </dependencies>

2.设置工具类

public class PageUtils implements Serializable 
	private static final long serialVersionUID = 1L;
	//总记录数
	private int totalCount;
	//每页记录数
	private int pageSize;
	//总页数
	private int totalPage;
	//当前页数
	private int currPage;
	//列表数据
	private List<?> list;
	
	//dubbo的函数返回类，含有有参构造函数时，必须写明一个无参构造函数
	public PageUtils() 
		super();
	

	/**
	 * 分页
	 * @param list        列表数据
	 * @param totalCount  总记录数
	 * @param pageSize    每页记录数
	 * @param currPage    当前页数
	 */
	public PageUtils(List<?> list, int totalCount, int pageSize, int currPage) 
		this.list = list;
		this.totalCount = totalCount;
		this.pageSize = pageSize;
		this.currPage = currPage;
		this.totalPage = (int)Math.ceil((double)totalCount/pageSize);
	

	/**
	 * 分页
	 */
	public PageUtils(Page<?> page) 
		this.list = page.getRecords();
		this.totalCount = page.getTotal();
		this.pageSize = page.getSize();
		this.currPage = page.getCurrent();
		this.totalPage = page.getPages();
	

	public int getTotalCount() 
		return totalCount;
	

	public void setTotalCount(int totalCount) 
		this.totalCount = totalCount;
	

	public int getPageSize() 
		return pageSize;
	

	public void setPageSize(int pageSize) 
		this.pageSize = pageSize;
	

	public int getTotalPage() 
		return totalPage;
	

	public void setTotalPage(int totalPage) 
		this.totalPage = totalPage;
	

	public int getCurrPage() 
		return currPage;
	

	public void setCurrPage(int currPage) 
		this.currPage = currPage;
	

	public List<?> getList() 
		return list;
	

	public void setList(List<?> list) 
		this.list = list;
	
	

3.调用类：

3.1 service层

 4.页面分页效果