package pers.kangxu.datautils.common;
import java.io.Serializable;
import java.util.List;
/**
 * 
 * <b> 分頁通用類 </b>
 * 
 * @author kangxu
 * @param <T>
 * 
 */
public class Pager<T> implements Serializable {
 /**
 * 
 */
 private static final long serialVersionUID = 4542617637761955078L;
 /**
 * currentPage 當前頁
 */
 private int currentPage = 1;
 /**
 * pageSize 每頁大小
 */
 private int pageSize = 10;
 /**
 * pageTotal 總頁數
 */
 private int pageTotal;
 /**
 * recordTotal 總條數
 */
 private int recordTotal = 0;
 /**
 * previousPage 前一頁
 */
 private int previousPage;
 /**
 * nextPage 下一頁
 */
 private int nextPage;
 /**
 * firstPage 第一頁
 */
 private int firstPage = 1;
 /**
 * lastPage 最后一頁
 */
 private int lastPage;
 /**
 * content 每頁的內容
 */
 private List<T> content;
 // 以下set方式是需要賦值的
 /**
 * 設置當前頁 <br>
 * 
 * @author kangxu
 * 
 * @param currentPage
 */
 public void setCurrentPage(int currentPage) {
 this.currentPage = currentPage;
 }
 /**
 * 設置每頁大小,也可以不用賦值,默認大小為10條 <br>
 * 
 * @author kangxu
 * 
 * @param pageSize
 */
 public void setPageSize(int pageSize) {
 this.pageSize = pageSize;
 }
 /**
 * 設置總條數,默認為0 <br>
 * 
 * @author kangxu
 * 
 * @param recordTotal
 */
 public void setRecordTotal(int recordTotal) {
 this.recordTotal = recordTotal;
 otherAttr();
 }
 /**
 * 設置分頁內容 <br>
 * 
 * @author kangxu
 * 
 * @param content
 */
 public void setContent(List<T> content) {
 this.content = content;
 }
 /**
 * 設置其他參數
 * 
 * @author kangxu
 * 
 */
 public void otherAttr() {
 // 總頁數
 this.pageTotal = this.recordTotal % this.pageSize > 0 ? this.recordTotal / this.pageSize + 1 : this.recordTotal / this.pageSize;
 // 第一頁
 this.firstPage = 1;
 // 最后一頁
 this.lastPage = this.pageTotal;
 // 前一頁
 if (this.currentPage > 1) {
 this.previousPage = this.currentPage - 1;
 } else {
 this.previousPage = this.firstPage;
 }
 // 下一頁
 if (this.currentPage < this.lastPage) {
 this.nextPage = this.currentPage + 1;
 } else {
 this.nextPage = this.lastPage;
 }
 }
 // 放開私有屬性
 public int getCurrentPage() {
 return currentPage;
 }
 public int getPageSize() {
 return pageSize;
 }
 public int getPageTotal() {
 return pageTotal;
 }
 public int getRecordTotal() {
 return recordTotal;
 }
 public int getPreviousPage() {
 return previousPage;
 }
 public int getNextPage() {
 return nextPage;
 }
 public int getFirstPage() {
 return firstPage;
 }
 public int getLastPage() {
 return lastPage;
 }
 public List<T> getContent() {
 return content;
 }
 @Override
 public String toString() {
 return "Pager [currentPage=" + currentPage + ", pageSize=" + pageSize
 + ", pageTotal=" + pageTotal + ", recordTotal=" + recordTotal
 + ", previousPage=" + previousPage + ", nextPage=" + nextPage
 + ", firstPage=" + firstPage + ", lastPage=" + lastPage
 + ", content=" + content + "]";
 }
}

package pers.kangxu.datautils.utils;
import java.util.ArrayList;
import java.util.List;
import pers.kangxu.datautils.common.Pager;
/**
 * 分頁數據測試
 * <b>
 *
 * </b>
 * @author kangxu
 *
 */
public class PagerTester {
 public static void main(String[] args) {
 Pager<String> pager = new Pager<String>();
 List<String> content = new ArrayList<String>();
 content.add("str1");
 content.add("str2");
 content.add("str3");
 content.add("str4");
 content.add("str5");
 content.add("str6");
 content.add("str7");
 content.add("str8");
 content.add("str9");
 content.add("str10");
 pager.setCurrentPage(1);
 pager.setPageSize(10);
 pager.setRecordTotal(62);
 pager.setContent(content);
 System.out.println(pager);
 }
}