我的struts分页算法的实现(1)

public PageBean(int totalRows){
this.totalRows = totalRows;
this.currentPage = 1;
hasPreviousPage = false;
if ((totalRows % pageRecorders) == 0) {
totalPages = totalRows / pageRecorders;
} else {
totalPages = totalRows / pageRecorders + 1;
}
if (totalRows >= pageRecorders) {
hasNextPage = true;
nextPage = 2;
this.pageEndRow = pageRecorders;
} else {
this.pageEndRow = totalRows;
hasNextPage = false;
nextPage = 1;
}
this.pageStartRow = 0;  
previousPage = 1;
}

public void nextPage() {
if(hasNextPage == true)
currentPage = currentPage + 1;
if ((currentPage - 1) > 0) {
hasPreviousPage = true;
} else {
hasPreviousPage = false;
}
if (currentPage >= totalPages) {
hasNextPage = false;
this.nextPage = currentPage;
} else {
hasNextPage = true;
nextPage = currentPage+1;
}
this.pageStartRow = (currentPage -1) * pageRecorders;
if(hasNextPage == true)
this.pageEndRow = pageStartRow + 5;
else{
this.pageEndRow =this.totalPages;
}
previousPage = currentPage - 1;
}

public void previousPage() {
if(hasPreviousPage == true)
currentPage = currentPage - 1;
if (currentPage == 0) {
currentPage = 1;
}
if (currentPage >= totalPages) {
hasNextPage = false;
} else {
hasNextPage = true;
}
nextPage = currentPage + 1;
if ((currentPage - 1) > 0) {
hasPreviousPage = true;
previousPage = currentPage - 1;
} else {
hasPreviousPage = false;
previousPage = currentPage;
}

this.pageStartRow = (currentPage -1) * pageRecorders;
if(hasNextPage == true)
this.pageEndRow = pageStartRow + 5;
else{
this.pageEndRow =this.totalPages;
}
}

<logic:equal name="page" property="hasNextPage" value="true">
<html:link page="/List.do?action=nextPage">
nextPage
</html:link>
</logic:equal>
<logic:equal name="page" property="hasPreviousPage" value="true">
<html:link page="/List.do?action=previousPage">
PreviousPage
</html:link>
</logic:equal>