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一個通用的查詢結果頁面對象

通常，此類對象放在項目的vo包中。
PageBean.java代碼：

package org.zodiac.vo;

import java.util.List;

/**查詢結果頁面對象

*

*/

public class PageBean {

private static final long serialVersionUID = 8167148510462280050L;

private static Integer defaulfRowsPerPage = new Integer(50);

private Integer rowsPerPage;

private Integer currentPage;

private Long totalRows;

private Integer totalPages;

private Integer startIndex;

private Integer endIndex;

private Integer nextPage;// 下一頁的頁碼

private Integer previousPage;// 上一頁的頁碼

private Boolean hasNextPage;// 是否有下一頁

private Boolean hasPreviousPage;// 是否有前一頁

private List<?> list;

private IQueryCondition queryCondition;//查詢條件對象

public PageBean(QueryCondition queryCondition) {

super();

this.queryCondition = queryCondition;

if (queryCondition==null||queryCondition.getCurrentPage() == null) {

this.currentPage = new Integer(1);

} else {

this.currentPage = queryCondition.getCurrentPage();

}

this.rowsPerPage = defaulfRowsPerPage;

}

public PageBean(Integer currentPage, Integer rowsPerPage) {

super();

if (currentPage == null) {

this.currentPage = new Integer(1);

} else {

this.currentPage = currentPage;

}

if (rowsPerPage == null || rowsPerPage.intValue() < 1) {

this.rowsPerPage = defaulfRowsPerPage;

} else {

this.rowsPerPage = rowsPerPage;

}

/**

* 設置總數量，計算全部其他參數

*

* @param totalRows

*/

public void setTotalRows(Long totalRows) {

this.totalRows = totalRows;

// 計算總頁數

if ((totalRows.longValue() % rowsPerPage.intValue()) == 0) {

totalPages = new Integer((int) (totalRows.longValue() / rowsPerPage.intValue()));

} else {

totalPages = new Integer((int) (totalRows.longValue() / rowsPerPage.intValue() + 1));

}

// 計算下一頁

if (totalPages.compareTo(this.currentPage) > 0) {

hasNextPage = Boolean.TRUE;

nextPage = new Integer(currentPage.intValue() + 1);

} else {

currentPage = totalPages;

hasNextPage = Boolean.FALSE;

nextPage = totalPages;

}

// 計算上一頁

if (this.currentPage.intValue() > 1) {

hasPreviousPage = Boolean.TRUE;

previousPage = new Integer(currentPage.intValue() - 1);

} else {

currentPage = new Integer(1);

hasPreviousPage = Boolean.FALSE;

previousPage = new Integer(1);

}

// 計算當前頁的起止行

endIndex = new Integer(currentPage.intValue() * rowsPerPage.intValue());

startIndex = new Integer(endIndex.intValue() - rowsPerPage.intValue() + 1);

}

public Integer getCurrentPage() {

return currentPage;

}

public Integer getEndIndex() {

return endIndex;

}

public Boolean getHasNextPage() {

return hasNextPage;

}

public Boolean getHasPreviousPage() {

return hasPreviousPage;

}

public Integer getNextPage() {

return nextPage;

}

public Integer getPreviousPage() {

return previousPage;

}

public Integer getRowsPerPage() {

return rowsPerPage;

}

public Integer getStartIndex() {

return startIndex;

}

public Integer getTotalPages() {

return totalPages;

}

public Long getTotalRows() {

return totalRows;

}

public List<?> getList() {

return list;

}

public void setList(List<?> list) {

this.list = list;

}

public IQueryCondition getQueryCondition() {

return queryCondition;

}

public void setQueryCondition(IQueryCondition queryCondition) {

this.queryCondition = queryCondition;

}

IQueryCondition的實現就不羅嗦了。

posted on 2008-12-24 15:01 Zodiac 閱讀(210) 評論(0) 編輯收藏

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隨筆檔案(4)

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留言簿(1)

閱讀排行榜

評論排行榜

一個通用的查詢結果頁面對象