Paging logic for Java Web front-end pages

1<div class= "Divbody" >2<div class= "Divcontent" >3<%--Previous Page--%>4<c:choose>//Page is all the object data that you have by querying the current page pagenum is the current page if =1 then (previous page) No connected display out5<c:when test= "${page.pagenum eq 1}" ><span class= "spanbtndisabled" > Prev </span></c:when>6     //Otherwise there is a link to the previous page then the connection value is (current page-1) just fine.7<c:otherwise><a href= "You want to visit the servlet or action&pagenum=${pager.pagenum-1}" class= "Abtn bold" > Prev </ A></c:otherwise>8</c:choose>9         Ten          One  A<%--we need to calculate the start and end of the page number list, that is, two variables, begin and end - calculate what they need to pass through the current page!  - below try a page to show only 6 pages on the basis of course you want to show how much you can set your own the1. Total pages less than 6 pages-begin=1, end=Maximum page -2. Set begin and end,begin= by Formula pagenum-2,end= Current page pagrnum+3 -3. If begin<1, then let begin=1,end=6 -4. If end> max page, let begin= total number of pages-5, end=Total Pages +--%> -  +  //Total Pages: Page.pagecount A  //Current page: Page.pagenum at<c:choose> -     //because we only show 6 pages of data on the page if the total number of pages is less than 6. -<c:when test= "${total pages <= 6}" > -<c:setvar= "Begin" value= "1"/>//set the value of Begin is 1 -<c:setvar= "End" value= "total pages"/>//Set end value is the total number of pages -</c:when> in     //otherwise do the following things -<c:otherwise> to         //if the total number of pages is greater than 6, here we assume that the total number of pages is 7 pages then the page is displayed as 1 2 3 4 5 6 ... +         //Let's take a look at a couple of things. -         //1. Current page if the 3rd page bengin is 3-2=1 end is 3+3=6 then the page display is 1 2 3 4 5 6 ... the         //2. Current page If the 4th page of the word begin is 4-2=2 end is 4+3=7 then the page display is 2 3 4 5 6 7 no ellipsis 1 and ... Disappear *         //3. Current page if it is page 5,6,7 begin is 5-2=3 6-2=4 7-2=5 end is 5+3=8 6+3=9 7+3=10 but the maximum page is 7 not to 8 9 10 will be the following Judgment page Display 2 3 4 5 6 7 $         //4. Current page If it is 1th, 2 pages of the word begin is 1-2=-1 and 2-2=0 end is 1+3=4 2+3=5 but start page begin must be 1 can not meet the situation will be the following judgment page display 1 2 3 4 5 6 ...Panax Notoginseng<c:setvar= "Begin" value= "${current page -2}"/> -<c:setvar= "End" value= "${current page + 3}"/> the         //if the begin is 1 and 0 then less than 1 then set the start page begin to 1 end page end for 6 page display 1 2 3 4 5 6 ... +<c:ifTest= "${begin < 1}" > A<c:setvar= "Begin" value= "1"/> the<c:setvar= "End" value= "6"/> +</c:if> -         //If the end page is greater than the total number of pages, which is the third case above, the end page is 8 9 10, then the total number of pages is more than 7 then set start bengin The current page is the total number of pages 7-5=2 $         //the end is the total number of pages displayed as 2 3 4 5 6 7 $<c:ifTest= "${end > Total pages}" > -<c:setvar= "Begin" value= "${Total pages-5}"/> -<c:setvar= "End" value= "${Total pages}"/> the</c:if> -</c:otherwise>Wuyi</c:choose> the   -  //gets the value loop to begin and end Wu<c:foreach begin= "${begin}" end= "${end}"var= "I" > -<c:choose> About<c:when test= "${i eq Current page}" > $<span class= "Spanbtnselect" >${i}</span>//if I equals current page then do not give link -</c:when> -<c:otherwise> -<a href= "${you access the action or servlet}&pc=${i}" class= "abtn" >${i}</a>//otherwise it will give the link A</c:otherwise> +</c:choose> the             -                $</c:forEach> the<%--compute begin and End--%> the<%--if the total number of pages <=6, then show all page numbers, that is, Begin=1 end=${total pages}--%> the<%--set begin= Current page number -2,end= current page +3--%> the<%--if begin<1, then let Begin=1 end=6--%> -<%--if end> max page, then begin= max page -5 end= max page--%> in  the  the     //If the end page is less than the total number of pages 7 then show ... About<%--Display Point Point--%> the<c:ifTest= "${end < Total pages}" > the<span class= "Spanapostrophe" >...</span> the</c:if> +  -      the<%--Next--%>Bayi<c:choose> the<c:when test= "${current page eq total pages}" ><span class= "spanbtndisabled" > Next </span></c:when> the<c:otherwise><a href= "${the action and servlet you want to access}&pagenum=${current page +1}" class= "Abtn bold" > Next </a> </c:otherwise> -</c:choose> -          the          the&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the      the<%--total n pages to M page--%> -<span> Total ${page.pagecount} page </span> the<span> to </span> the<input type= "text" class= "Inputpagecode" id= "Pagecode" value= "${current page}"/> the<span> page </span>94<a href= "Javascript:_go (); class=" Asubmit "> OK </a> the</div> the</div>

Paging logic for Java Web front-end pages