1. 在config文件里面新增分页插件

//分页插件
@Bean
public PaginationInterceptor paginationInterceptor() {
    PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
    // 设置请求的页面大于最大页后操作， true调回到首页，false 继续请求  默认false
    // paginationInterceptor.setOverflow(false);
    // 设置最大单页限制数量，默认 500 条，-1 不受限制
    // paginationInterceptor.setLimit(500);
    // 开启 count 的 join 优化,只针对部分 left join
//        paginationInterceptor.setCountSqlParser(new JsqlParserCountOptimize(true));
    return paginationInterceptor;
}

2. 在代码里使用分页插件

@Test
void testPageQuery(){
    Page<User> page = new Page<>(3,5);
    //wrapper 条件构造器，模糊查询，排序，多表查询，子查询等
    userMapper.selectPage(page,null);
    List<User> users = page.getRecords();
    users.forEach(System.out::println);
    System.out.println(page.getCurrent());
    System.out.println(page.getOrders());
    System.out.println(page.getRecords());
    System.out.println(page.getSize());
    System.out.println(page.getTotal());
    System.out.println(page.hasNext());
    System.out.println(page.hasPrevious());

}


@Test
void testPageQuery2(){
    Page<Map<String,Object>> page = new Page<>(3,5);
    //wrapper 条件构造器，模糊查询，排序，多表查询，子查询等
    IPage<Map<String,Object>> mapIPage = userMapper.selectMapsPage(page,null);
    mapIPage.getRecords().forEach(System.out::println);
    System.out.println(page.getCurrent());
    System.out.println(page.getOrders());
    System.out.println(page.getRecords());
    System.out.println(page.getSize());
    System.out.println(page.getTotal());
    System.out.println(page.hasNext());
    System.out.println(page.hasPrevious());