第一步:pom文件还是需要引入依赖
<!--mybatis的分页插件--> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper-spring-boot-starter</artifactId> <version>1.2.5</version> </dependency>
第二步:这次直接是在项目的入口类application.java中直接设置PageHelper插件即可
//配置mybatis的分页插件pageHelper @Bean public PageHelper pageHelper(){ PageHelper pageHelper = new PageHelper(); Properties properties = new Properties(); properties.setProperty("offsetAsPageNum","true"); properties.setProperty("rowBoundsWithCount","true"); properties.setProperty("reasonable","true"); properties.setProperty("dialect","mysql"); //配置mysql数据库的方言 pageHelper.setProperties(properties); return pageHelper; }
第三步:同理,使用插件实现分页功能,方式还是一样,只需将当前查询的页数和每页显示的条数穿进去即可,直接源码
/** * 分页bean */ import java.util.List; public class PageBean<T> { // 当前页 private Integer currentPage = 1; // 每页显示的总条数 private Integer pageSize = 10; // 总条数 private Integer totalNum; // 是否有下一页 private Integer isMore; // 总页数 private Integer totalPage; // 开始索引 private Integer startIndex; // 分页结果 private List<T> items; public PageBean() { super(); } public PageBean(Integer currentPage, Integer pageSize, Integer totalNum) { super(); this.currentPage = currentPage; this.pageSize = pageSize; this.totalNum = totalNum; this.totalPage = (this.totalNum+this.pageSize-1)/this.pageSize; this.startIndex = (this.currentPage-1)*this.pageSize; this.isMore = this.currentPage >= this.totalPage?0:1; } public Integer getCurrentPage() { return currentPage; } public void setCurrentPage(Integer currentPage) { this.currentPage = currentPage; } public Integer getPageSize() { return pageSize; } public void setPageSize(Integer pageSize) { this.pageSize = pageSize; } public Integer getTotalNum() { return totalNum; } public void setTotalNum(Integer totalNum) { this.totalNum = totalNum; } public Integer getIsMore() { return isMore; } public void setIsMore(Integer isMore) { this.isMore = isMore; } public Integer getTotalPage() { return totalPage; } public void setTotalPage(Integer totalPage) { this.totalPage = totalPage; } public Integer getStartIndex() { return startIndex; } public void setStartIndex(Integer startIndex) { this.startIndex = startIndex; } public List<T> getItems() { return items; } public void setItems(List<T> items) { this.items = items; } }
分页功能源码(web层和service层)。
@Override public List<Item> findItemByPage(int currentPage,int pageSize) { //设置分页信息,分别是当前页数和每页显示的总记录数【记住:必须在mapper接口中的方法执行之前设置该分页信息】 PageHelper.startPage(currentPage, pageSize); List<Item> allItems = itemMapper.findAll(); //全部商品 int countNums = itemMapper.countItem(); //总记录数 PageBean<Item> pageData = new PageBean<>(currentPage, pageSize, countNums); pageData.setItems(allItems); return pageData.getItems(); }
/** * 商品分页功能(集成mybatis的分页插件pageHelper实现) * * @param currentPage :当前页数 * @param pageSize :每页显示的总记录数 * @return */ @RequestMapping("/itemsPage") @ResponseBody public List<Item> itemsPage(int currentPage,int pageSize){ return itemService.findItemByPage(currentPage, pageSize); }
到这儿呢,MyBatis的分页插件PageHelper就完全和SpringBoot集成到一起了,确实没有什么新鲜的。第一次使用,留下下次使用
来源:https://www.cnblogs.com/tianlong/p/10077131.html