idea使用pagehelper实现后端分页功能的步骤详解

<dependency>
   <groupId>com.github.pagehelper</groupId>
   <artifactId>pagehelper-spring-boot-starter</artifactId>
   <version>1.2.12</version>
  </dependency>

pagehelper.helperDialect=mysql
pagehelper.reasonable=true
pagehelper.supportMethodsArguments=true
pagehelper.params=count=countSql

 /**
  *分页形式查询所有的用户信息
  * @return
  */
 @Select("select * from user")
 public List<Map<String,Object>> QueryPageUsers();

/**
  * 分页查询所有用户
  * @param pagenum
  * @param pagesize
  * @return
  */
 List<Map<String,Object>> FindUsers(int pagenum,int pagesize);

/**
  * 分页形式查询所有的用户
  * @param pagenum
  * @param pagesize
  * @return
  */
 public List<Map<String, Object>> FindUsers(int pagenum, int pagesize) {
  PageHelper.startPage(pagenum,pagesize);
  List<Map<String, Object>> maps = selectUser.QueryPageUsers();
  return maps;
 }

/**
  * 分页形式查询所有的用户
  * @param pagenum
  * @param pagesize
  * @return
  */
 @RequestMapping(value = "GetPageUsers",method = RequestMethod.POST)
 public @ResponseBody PageInfo<Map<String, Object>> GetPageUsers(int pagenum,int pagesize){
  List<Map<String, Object>> maps = getUserservice.FindUsers(pagenum, pagesize);
  PageInfo<Map<String, Object>> pagets = new PageInfo<Map<String, Object>>(maps);
  return pagets;
 }

{
 "total": 6,
 "list": [
  {
   "pass": "user",
   "level": 1,
   "sex": "男",
   "name": "user",
   "id": "1001",
   "age": 21
  },
  {
   "pass": "admin",
   "level": 10,
   "sex": "女",
   "name": "admin",
   "id": "1002",
   "age": 23
  }
 ],
 "pageNum": 1,
 "pageSize": 2,
 "size": 2,
 "startRow": 1,
 "endRow": 2,
 "pages": 3,
 "prePage": 0,
 "nextPage": 2,
 "isFirstPage": true,
 "isLastPage": false,
 "hasPreviousPage": false,
 "hasNextPage": true,
 "navigatePages": 8,
 "navigatepageNums": [
  1,
  2,
  3
 ],
 "navigateFirstPage": 1,
 "navigateLastPage": 3
}