标签：debug 导航 class tsql 帮助 lse boot navigate data
Hello大家好，本章我们添加PageHelper分页查询功能。另求各路大神指点，感谢
PageHelper是一款好用的开源免费的Mybatis第三方物理分页插件
物理分页
支持常见的 12 种数据库。Oracle,MySql,MariaDB,SQLite,DB2,PostgreSQL,SqlServer 等
支持多种分页方式
支持常见的RowBounds(PageRowBounds)，PageHelper.startPage 方法调用，Mapper 接口参数调用
<dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper-spring-boot-starter</artifactId> <version>1.2.5</version> </dependency>
然后鼠标右键选择Maven→Reimport进行依赖下载
在application.properties中添加
logging.level.com.example.demo.dao=DEBUG
pagehelper.helperDialect=mysql
pagehelper.reasonable=true
pagehelper.supportMethodsArguments=true
pagehelper.params=count=countSql
pagehelper.page-size-zero=trueUserInfoMapper.xml
<select id="selectAll" resultMap="BaseResultMap"> select <include refid="Base_Column_List"/> from user_info </select>
UserInfoMapper
List<UserInfo> selectAll();
UserInfoService
PageInfo<UserInfo> selectAll(Integer page,Integer size);
UserInfoServiceImpl
@Override public PageInfo<UserInfo> selectAll(Integer page, Integer size) { //开启分页查询，写在查询语句上方 //只有紧跟在PageHelper.startPage方法后的第一个Mybatis的查询（Select）方法会被分页。 PageHelper.startPage(page, size); List<UserInfo> userInfoList = userInfoMapper.selectAll(); PageInfo<UserInfo> pageInfo = new PageInfo<>(userInfoList); return pageInfo; }
UserInfoController
@ApiOperation(value = "查询用户", notes = "分页查询用户所有") @ApiImplicitParams({ @ApiImplicitParam(name = "page", value = "当前页码", dataType = "Integer", paramType = "query"), @ApiImplicitParam(name = "size", value = "每页显示条数", dataType = "Integer", paramType = "query") }) @PostMapping("/selectAll") public RetResult<PageInfo<UserInfo>> selectAll(@RequestParam(defaultValue = "0") Integer page, @RequestParam(defaultValue = "0") Integer size) { PageInfo<UserInfo> pageInfo = userInfoService.selectAll(page, size); return RetResponse.makeOKRsp(pageInfo); }
//当前页 private int pageNum; //每页的数量 private int pageSize; //当前页的数量 private int size; //当前页面第一个元素在数据库中的行号 private int startRow; //当前页面最后一个元素在数据库中的行号 private int endRow; //总记录数 private long total; //总页数 private int pages; //结果集 private List<T> list; //第一页 private int firstPage; //前一页 private int prePage; //是否为第一页 private boolean isFirstPage; //是否为最后一页 private boolean isLastPage; //是否有前一页 private boolean hasPreviousPage; //是否有下一页 private boolean hasNextPage; //导航页码数 private int navigatePages; //所有导航页号 private int[] navigatepageNums;
地址：http://192.168.1.104:8080/userInfo/selectAll
情况一：不传参数，默认为全查询
{
"code": 200,
"data": {
"endRow": 2,
"firstPage": 0,
"hasNextPage": false,
"hasPreviousPage": false,
"isFirstPage": false,
"isLastPage": true,
"lastPage": 0,
"list": [
{
"id": 1,
"userName": "Mr_初晨"
},
{
"id": 2,
"userName": "Mr_初晨"
}
],
"navigateFirstPage": 0,
"navigateLastPage": 0,
"navigatePages": 8,
"navigatepageNums": [],
"nextPage": 0,
"orderBy": "",
"pageNum": 0,
"pageSize": 0,
"pages": 0,
"prePage": 0,
"size": 2,
"startRow": 1,
"total": 2
},
"msg": "success"
}情况二：参数 page=2&size=1
{
"code": 200,
"data": {
"endRow": 2,
"firstPage": 1,
"hasNextPage": false,
"hasPreviousPage": true,
"isFirstPage": false,
"isLastPage": true,
"lastPage": 2,
"list": [
{
"id": 2,
"userName": "Mr_初晨"
}
],
"navigateFirstPage": 1,
"navigateLastPage": 2,
"navigatePages": 8,
"navigatepageNums": [
1,
2
],
"nextPage": 0,
"orderBy": "",
"pageNum": 2,
"pageSize": 1,
"pages": 2,
"prePage": 1,
"size": 1,
"startRow": 2,
"total": 2
},
"msg": "success"
}码云地址： https://gitee.com/beany/mySpringBoot
GitHub地址： https://github.com/MyBeany/mySpringBoot
写文章不易，如对您有帮助，请帮忙点下star
?
添加PageHelper分页查询功能已完成，后续功能接下来陆续更新，另求各路大神指点，感谢大家。
SpringBoot2.0系列教程（七）Springboot框架添加PageHelper分页查询功能
标签：debug 导航 class tsql 帮助 lse boot navigate data
原文地址：https://www.cnblogs.com/mrBeany/p/10649672.html
