比较实用的SSH分页
//分页实体bean
public class Page {
?/** imply if the page has previous page */
??? private boolean hasPrePage;
??
??? /** imply if the page has next page */
??? private boolean hasNextPage;
??????
??? /** the number of every page */
??? private int everyPage;
??
??? /** the total page number */
??? private int totalPage;
???
??? /** the total record number */
??? private int totalRecords;
??????
??? /** the number of current page */
??? private int currentPage;
??
??? /** the begin index of the records by the current query */
??? private int beginIndex;
??
??
??? /** The default constructor */
??? public Page(){
??????
??? }
??
??? /** construct the page by everyPage
???? * @param everyPage
???? * */
??? public Page(int everyPage){
??????? this.everyPage = everyPage;
??? }
??
??? /** The whole constructor */
??? public Page(boolean hasPrePage, boolean hasNextPage,
??????????????????? int everyPage, int totalPage, int totalRecords,
??????????????????? int currentPage, int beginIndex) {
??????? this.hasPrePage = hasPrePage;
??????? this.hasNextPage = hasNextPage;
??????? this.everyPage = everyPage;
??????? this.totalPage = totalPage;
??????? this.totalRecords = totalRecords;
??????? this.currentPage = currentPage;
??????? this.beginIndex = beginIndex;
??? }
??? /**
???? * @return
???? * Returns the beginIndex.
???? */
??? public int getBeginIndex() {
??????? return beginIndex;
??? }
??
??? /**
???? * @param beginIndex
???? * The beginIndex to set.
???? */
??? public void setBeginIndex(int beginIndex) {
??????? this.beginIndex = beginIndex;
??? }
??
??? /**
???? * @return
???? * Returns the currentPage.
???? */
??? public int getCurrentPage() {
??????? return currentPage;
??? }
??
??? /**
???? * @param currentPage
???? * The currentPage to set.
???? */
??? public void setCurrentPage(int currentPage) {
??????? this.currentPage = currentPage;
??? }
??
??? /**
???? * @return
???? * Returns the everyPage.
???? */
??? public int getEveryPage() {
??????? return everyPage;
??? }
??
??? /**
???? * @param everyPage
???? * The everyPage to set.
???? */
??? public void setEveryPage(int everyPage) {
??????? this.everyPage = everyPage;
??? }
??
??? /**
???? * @return
???? * Returns the hasNextPage.
???? */
??? public boolean getHasNextPage() {
??????? return hasNextPage;
??? }
??
??? /**
???? * @param hasNextPage
???? * The hasNextPage to set.
???? */
??? public void setHasNextPage(boolean hasNextPage) {
??????? this.hasNextPage = hasNextPage;
??? }
??
??? /**
???? * @return
???? * Returns the hasPrePage.
???? */
??? public boolean getHasPrePage() {
??????? return hasPrePage;
??? }
??
??? /**
???? * @param hasPrePage
???? * The hasPrePage to set.
???? */
??? public void setHasPrePage(boolean hasPrePage) {
??????? this.hasPrePage = hasPrePage;
??? }
??
??? /**
???? * @return Returns the totalPage.
???? *
???? */
??? public int getTotalPage() {
??????? return totalPage;
??? }
??
??? /**
???? * @param totalPage
???? * The totalPage to set.
???? */
??? public void setTotalPage(int totalPage) {
??????? this.totalPage = totalPage;
??? }
???
??? /**
???? * @param totalRecords
???? * The totalRecords to set.
???? */
??? public void settotalRecords(int totalRecords)
??? {
??????? this.totalRecords = totalRecords;
??? }
??? /**
???? * @return Returns the totalRecords.
???? *
???? */
??? public int getTotalRecords()
??? {
??????? return this.totalRecords;
??? }
}
?
//分页操作类
public class PageUtil {
?/**
???? * Use the origin page to create a new page
???? * @param page
???? * @param totalRecords
???? * @return
???? */
??? public static Page createPage(Page page, int totalRecords){
??????? return createPage(page.getEveryPage(), page.getCurrentPage(), totalRecords);
??? }
??
??? /**
???? * the basic page utils not including exception handler
???? * @param everyPage
???? * @param currentPage
???? * @param totalRecords
???? * @return page
???? */
??? public static Page createPage(int everyPage, int currentPage, int totalRecords){
??????? everyPage = getEveryPage(everyPage);
??????? currentPage = getCurrentPage(currentPage);
??????
??????? int totalPage = getTotalPage(everyPage, totalRecords);
??????? boolean hasNextPage = hasNextPage(currentPage, totalPage);
??????? boolean hasPrePage = hasPrePage(currentPage);
??????? int? beginIndex = getBeginIndex(everyPage, currentPage);
??????? if(currentPage >= totalPage) {
??????? ?beginIndex = getBeginIndex(everyPage, totalPage);???
??????? ?currentPage = totalPage;
??????? }
??????? return new Page(hasPrePage, hasNextPage,
??????????????????????????????? everyPage, totalPage, totalRecords,
??????????????????????????????? currentPage, beginIndex);
??? }
??
??? private static int getEveryPage(int everyPage){
??????? return everyPage == 0 ? 10 : everyPage;
??? }
??
??? private static int getCurrentPage(int currentPage){
??????? return currentPage == 0 ? 1 : currentPage;
??? }
??
??? private static int getBeginIndex(int everyPage, int currentPage){
??????? return (currentPage - 1) * everyPage;
??? }
??????
??? private static int getTotalPage(int everyPage, int totalRecords){
??????? int totalPage = 0;
??????????????
??????? if(totalRecords % everyPage == 0)
??????????? totalPage = totalRecords / everyPage;
??????? else
??????????? totalPage = totalRecords / everyPage + 1 ;
??????????????
??????? return totalPage;
??? }
??
??? private static boolean hasPrePage(int currentPage){
??????? return currentPage == 1 ? false : true;
??? }
??
??? private static boolean hasNextPage(int currentPage, int totalPage){
??????? return currentPage == totalPage || totalPage == 0 ? false : true;
??? }
}
