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- package com.edu.base;
- /**
- * @author wu youyang
- */
- import com.alibaba.fastjson.JSON;
- import io.swagger.annotations.ApiModel;
- import io.swagger.annotations.ApiModelProperty;
- import java.io.Serializable;
- @ApiModel(description = "分页对象")
- public class Page implements Serializable {
- private static final long serialVersionUID = -4312323165564562319L;
- @ApiModelProperty("页码")
- private int page = 1;
- @ApiModelProperty("每页条数")
- private int pageSize = 10;
-
- /**
- * 总记录数, -1: 未知
- */
- private int total = -1;
- public int getPage() {
- return page;
- }
- /**
- * 当前页码, 1-based
- */
- public void setPage(int page) {
- this.page = page;
- }
- /**
- * 每页记录数
- */
- public int getPageSize() {
- return pageSize;
- }
- public void setPageSize(int pageSize) {
- this.pageSize = pageSize;
- }
- public int getTotal() {
- return total;
- }
- public void setTotal(int total) {
- this.total = total;
- }
- public int getPrevPage() {
- return this.isFirstPage() ? this.getPage() : this.getPage() - 1;
- }
- public int getNextPage() {
- return this.isLastPage() ? this.getPage() : this.getPage() + 1;
- }
- public boolean isFirstPage() {
- return (1 == this.getPage());
- }
- public boolean isLastPage() {
- if(-1 == this.getPageCount()){
- return false;
- }
-
- return (this.getPageCount() < 1 || this.getPageCount() <= this.getPage());
- }
- /**
- * 页数, 根据total和pageSize计算
- * -1: 未知
- * @return
- */
- public int getPageCount() {
- if(-1 == total){
- return -1;
- }
-
- if (total < 1) {
- return 0;
- }
-
- if (pageSize < 1) {
- return 1;
- }
- return (0 == total % pageSize) ? total / pageSize : total / pageSize
- + 1;
- }
- /**
- *
- * mysql offset, 0-based, 根据page和pageSize计算
- *
- * @return
- */
- public int getOffset() {
- if (page < 1) {
- return 0;
- }
- return (page - 1) * pageSize;
- }
- /**
- * mysql limit, 0-based, 根据page和pageSize计算
- *
- * @return
- */
- public int getLimit() {
- return pageSize;
- }
- @Override
- public int hashCode() {
- final int prime = 31;
- int result = 1;
- result = prime * result + page;
- result = prime * result + pageSize;
- result = prime * result + total;
- return result;
- }
- @Override
- public boolean equals(Object obj) {
- if (this == obj){
- return true;
- }
- if (obj == null){
- return false;
- }
- if (getClass() != obj.getClass()){
- return false;
- }
- Page other = (Page) obj;
- if (page != other.page){
- return false;
- }
- if (pageSize != other.pageSize){
- return false;
- }
- if (total != other.total){
- return false;
- }
-
- return true;
- }
- public String toString() {
- return JSON.toJSONString(this);
- }
- }
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