目的:利用PageHelper实现 springboot分页
1.pom文件
<!--pagehelper 分页--> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper-spring-boot-starter</artifactId> <version>1.2.3</version> </dependency>
2.controller代码
@GetMapping("getnumberlist") public PageUtil<Map<String, String>> geNumberList(@RequestParam("pagenum") int pagenum, @RequestParam("pagesize")int pagesize){ PageUtil<Map<String, String>> pageUtil = bpCountLimitService.getCommitMentNumberList(pagenum1, pagesize); return pageUtil; }
3.service代码
@Service public class BPCountLimitServiceImpl implements BPCountLimitService{ @Autowired private BPCountLimitMapper bpCountLimitMapper; @Override public PageUtil<Map<String,String>> getCommitMentNumberList(int pagenum, int pagesize) { List<Map<String,String>> list = null ; Page<Map<String,String>> page = null; PageUtil<Map<String,String>> pageUtil=null; page = PageHelper.startPage(pagenum, pagesize); list = bpCountLimitMapper.getCommitMentNumberList(); pageUtil = new PageUtil<>(page,list); System.out.println("....."); return pageUtil; }
4.PageUtil
@Data public class PageUtil<T> implements Serializable { private static final long serialVersionUID = 1049685030686235447L; /** * number 每页显示数量 * size 每页显示数量 * numberOfElements 当前页记录数 * totalElements 总记录数 * totalPages 总页数 * content 返回结果集 */ private int number=1; private int size = 5; private int numberOfElements; private long totalElements; private int totalPages; private List<T> content; public PageUtil(){ } public PageUtil(List<T> list){ setNumber(0); int count=list.size(); setSize(count); setNumberOfElements(count); setTotalElements(count); setContent(list); setTotalPages(1); } public PageUtil(Page<T> page, List<T> list){ setNumber(page.getPageNum()); int count=list.size(); setSize(page.getPageSize()); setNumberOfElements(count); setTotalElements(page.getTotal()); setContent(list); setTotalPages(page.getPages()); } }
5.application.yml
# 分页配置
pagehelper:
helper-dialect: mysql
reasonable: true
support-methods-arguments: true
params: count=countSql
注意:要是页数小于1显示第一页,大于最后一页显示最后一页。