java8 新特性 streamAPI limit +skip 中段操作实现List集合分页

1.创建PageVo 实体类

package com.dh.steamapi;

import lombok.Data;

import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;


@Data
public class PageVo {

    private int pageSize;//每页显示的元素条数
    private int pageNo;//当前第几页 1是第一页
    private int total;//总数
    private List list;//分页结果内容

    //实现分页方法
    //skip+limit 可以实现分页操作
    public  PageVo listPage(List dataList,int pageNo,int pageSize){
        //pageNo 当前第几页 1是第一页
        //pageSize 每页显示的元素条数
        PageVo p = new PageVo();
        List resultListPage = new ArrayList<>();
        //skip(代表跳出前面多少元素) limit(每页数据)
        resultListPage = dataList.stream().skip((pageNo-1) *
                pageSize).limit(pageSize).collect(Collectors.toList());
        p.setTotal(dataList.size());
        p.setPageNo(pageNo);
        p.setPageSize(pageSize);
        p.setList(resultListPage);
        //resultListPage.forEach(System.out::println);
        return p;
    }

}

 2.用测试数据测试

package com.dh.steamapi;

import org.junit.Test;

import java.util.ArrayList;
import java.util.List;

public class TestStreamAPI2{

    //skip+limit 可以实现分页操作
    //测试数据
    @Test
    public  void test2(){
        List employeeList = new ArrayList<>();
        employeeList.add(new Employee("李四","男",30,5000));
        employeeList.add(new Employee("张三","男",38,2000));
        employeeList.add(new Employee("王五","男",38,3000));
        employeeList.add(new Employee("赵六","男",30,5000));
        employeeList.add(new Employee("田七","男",38,3000));
        employeeList.add(new Employee("重八","男",30,6000));
        employeeList.add(new Employee("重八","男",30,6000));
        employeeList.add(new Employee("重八","男",30,6000));
        employeeList.add(new Employee("重八","男",30,6000));
        PageVo pageVo = new PageVo<>();
        List employeePageList = pageVo.listPage(employeeList, 2, 5).getList();
        employeePageList.forEach(System.out::println);
    }
}

 3.效果图