Struts Development Practice - Paging Implementation
The main function of this case is to complete the paging display of the data set. The sample code is as follows:
1.PageInfo class: Define Pipe Information.
/ ****************** Program Begin ************************** /
Package test;
Import java.io. *;
Public Final Class PaginationInfo
IMPLEMENTS SERIALIZABLE {
/ ** Page size Description How many lines per page * /
Private int pagesize = 20;
/ ** Is there a previous page * /
Private Boolean Hasprevious
/ ** Is there a next page * /
Private boolean hasnext;
/ ** total number * /
PRIVATE INT TOTAL;
/**total pages */
Private int totalpage;
/ ** Current page number * /
Private int currentpagenumber = 1;
/ ** Jump action: 1: Home; 2: Previous page; 3: Take a page; 4: Last page * /
Private int jumpstate;
Public void setpagesize (int pageize) {
THIS.PAGESIZE = Pagesize;
}
Public int getpagesize () {
Return PageSize;
}
Public void setHasprevious (Boolean Hasprevious) {
THIS.HASPREVIOUS = HaspRevious
}
Public boolean getHasprevious () {
Return Hasprevious;
}
Public void setpreviouspagenumber (int readypagenumber) {
This.Previouspagenumber = previouspagenumber;
}
Public int getpreviouspagenumber () {
Return Previoun PREVIUSPAGENUMBER;
}
Public void sethasnext (Boolean Hasnext) {
THIS.hasnext = HasnexT;
}
Public boolean gethasnext () {
Return hasnexT;
}
Public void setnextpagenumber (int nextpagenumber) {
THIS.NEXTPAGENUMBER = NextPAGenumber;
}
Public int getNextPagenumber () {
Return nextpagenumber;
}
Public void settotal (int total) {
THIS. TOTAL = Total;
}
Public int gettotal () {
Return Total;
}
Public void settotalpage (int totalpage) {
THIS. TOTALPAGE = TotalPage;
}
Public int gettotalpage () {
Return Totalpage;
}
Public void setcurrentpagenumber (int currentpagenumber) {
THIS.CURRENTPAGENUMBER = CURRENTPAGENUMBER;
}
Public int getcurrentpagenumber () {
Return CurrentPagenumber;
}
Public void setjumpState (int JumpState) {this.jumpstate = jumpstate;
}
Public int getJumpState () {
Return jumpstate;
}
}
2. Paging Logic Method Code:
Public void setpageInfo (PAGINATIONINFO PAGINATIONINFO) {
// Jump page
IF (PAGINAFO.GETJUMPSTATE () == 1) {// Home
PAGINATIONINFO.SETCURRENTPAGENUMBER (1);
}
IF (PAGINAFO.GETJUMPSTATE () == 2) {
Paginginfo.setcurrentPagenumber () - 1);
}
IF (PAGINATIONINFO.GETJUMPSTATE () == 3) {
PAGINATIONINFO.SETCURRENTPAGENUMBER (PAGINATIONINFO.GETCURRENTPAGENUMBER () 1);
}
IF (PAGINATIONINFO.GETJUMPSTATE () == 4) {
Paginginfo.setCurrentPagenumber ()); PAGINATIONINFO.GETTOTALPAGE ());
}
INT TOTALPAGE = Total / PAGINATIONINFO.GETPAGESIZE ();
IF (Total% PAGINATIONINFO.GETPAGESIZE ()> 0) {
PAGINATIONINFO.SETTOTALPAGE (TotalPage 1);
}
Else {
PAGINATIONINFO.SETTOTATION (TOTALPAGE);
}
IF (PAGINAFO.GETCURRENTPAGENUMBER () <= 1) {
PAGINATIONINFO.SETCURRENTPAGENUMBER (1);
PAGINATIONINFO.SETHASPREVIOUS (FALSE);
PAGINATIONINFO.SETHASNEXT (TRUE);
}
Else IF (PAGINAFO.GETCURRENTPAGENUMBER ()> =
PAGINATIONINFO.GETTOTALPAGE ()) {
Paginginfo.setCurrentPagenumber ()); PAGINATIONINFO.GETTOTALPAGE ());
PAGINATIONINFO.SETHASNEXT (FALSE);
PAGINATIONINFO.SETHASPREVIOUS (TRUE);
}
Else {
PAGINATIONINFO.SETHASPREVIOUS (TRUE);
PAGINATIONINFO.SETHASNEXT (TRUE);
}
}
3. The page display code excerpt from the JSP page:
... / / olive
