PageHelper的简单使用(强大的分页工具)

1.使用maven解决依赖

		<dependency>
			<groupId>com.github.pagehelper</groupId>
			<artifactId>pagehelper</artifactId>
			<version>3.4.2</version>
		</dependency>

2.在Controller调用Service的时候,调用PageHelper

@RequestMapping("/sysadmin/dept/list")
	public String toDeptList(Model model,@RequestParam(required = false,defaultValue = "1",value = "pn")Integer pn ) {
		PageHelper.startPage(pn, 8);
		List<Dept> deptList = deptService.findAll();
		PageInfo<Dept>  p = new PageInfo<>(deptList);
		model.addAttribute("deptList", deptList);
		model.addAttribute("page", p);
		return "sysadmin/dept/jDeptList";

	}

PageHelper.startPage(pn, 8);     //参数分别是设置当前的页数和每页的数量

PageInfo<Dept>  p = new PageInfo<>(deptList);  //将得到查询结果集进行封装

3.在jsp页面进行简单的分页

<a href="/sysadmin/dept/list?pn=${page.firstPage}">首页</a>
<c:if test="${page.hasPreviousPage}"><a href="/sysadmin/dept/list?pn=${page.prePage}">上一页</a></c:if>
<c:if test="${!page.hasPreviousPage}">上一页</c:if>
						
<c:if test="${page.hasNextPage}"><a href="/sysadmin/dept/list?pn=${page.nextPage}">下一页</a></c:if>
<c:if test="${! page.hasNextPage}">下一页</c:if>
						
<a href="/sysadmin/dept/list?pn=${page.lastPage}">最后页</a>
<p>一共${page.pages}页 --当前页是${page.pageNum } -- 共有${page.total }条数据</p>

  简单的进行了调用,实现了基本的功能(使用pageInfo的相关属性)

参考:https://blog.csdn.net/qq_33624284/article/details/72828977

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