Extjs+Mysql動的ページングを実現
ちょうどExtjsを学んで、Extjsでページの小さい例を作って、何が間違っている地方があることを指摘して下さい
<title> </title>
<link rel="stylesheet" type="text/css" href="Extjs/resources/css/ext-all.css">
<script type="text/javascript" src="Extjs/adapter/ext/ext-base.js"></script>
<script type="text/javascript" src="Extjs/ext-all.js"></script>
<script type="text/javascript">
Ext.onReady(function(){
var userStore = new Ext.data.Store({
proxy : new Ext.data.HttpProxy( {
url : 'groups.do?method=groupsQuery'// url
}),
reader : new Ext.data.JsonReader({
totalProperty : 'results',
root : 'items',
id : 'row_id'
},
['row_id','name','createid','createtime','updateid','updatetime'])
});
var sm = new Ext.grid.CheckboxSelectionModel();
var cm = new Ext.grid.ColumnModel([
new Ext.grid.RowNumberer(),sm,{
header : ' ',
width : 30,
dataIndex : 'row_id',
sortable : true
},{
header : ' ',
width : 40,
dataIndex : 'name',
sortable : true
},{
header : ' ',
width:50,
dataIndex : 'createtime',
sortable : true
},{
header : ' ',
width : 50,
dataIndex : 'updatetime',
sortable : true
}
]);
var userGrid = new Ext.grid.GridPanel({
applyTo : 'user-grid-div',//
frame : true,//
//tbar : toolbar,//
stripeRows : true,//
autoScroll : true,// ，
store : userStore,//
loadMask : true,
autoHeight : true,
autoWidth : true,
viewConfig : {
autoFill : true
},
cm : cm,
sm : sm,
bbar : new Ext.PagingToolbar({
pageSize : 5,
store : userStore,
displayInfo : true,
beforePageText:' ',
afterPageText:' {0} ',
displayMsg:' {0} {1} ， {2} ',
emptyMsg : ' ',
firstText:' ',
prevText:' ',
nextText:' ',
lastText:' ',
refreshText:' '
})
});
userStore.reload({
params:{start:0,limit:5}
})
})
</script>
</head>
<body>
<div id = "user-grid-div" style="width:100%; height:100%;"></div>
</body>
</html>public List getGroupsQuery(Connection con,int start,int end) throws SQLException{
List list = new ArrayList();
Statement st = con.createStatement();
//String sql = "select * from groups";
String sql = "select * from groups limit "+start+","+end;
ResultSet rs = st.executeQuery(sql);
while(rs.next()){
Groups groups = new Groups();
groups.setRow_id(rs.getString("row_id"));
groups.setName(rs.getString("name"));
groups.setUpdateid(rs.getString("updateid"));
groups.setUpdatetime(rs.getString("updatetime"));
groups.setCreateid(rs.getString("createid"));
groups.setCreatetime(rs.getString("createtime"));
list.add(groups);
}
rs.close();
st.close();
return list;
}
public int getGroupsCount(Connection con) throws SQLException{
Statement st = con.createStatement();
String sql = "select count(1) from groups";
ResultSet rs = st.executeQuery(sql);
int totalCount = 0;
while(rs.next()){
totalCount = rs.getInt(1);
}
rs.close();
st.close();
return totalCount;
}private groupsDaoImpl gDao = new groupsDaoImpl();
public List getUserQuery(int start,int end){
List list = null;
Connection con = null;
try {
con = DBCon.getConnection();
//list = uDao.getUserQuery(con);
list = gDao.getGroupsQuery(con, start, end);
} catch (Exception e) {
list = new ArrayList();
e.printStackTrace();
}finally{
try {
if(con!=null){con.close();}
} catch (Exception e) {e.printStackTrace();}
}
return list;
}
public int getGroupsCount(){
int totalCount = 0;
Connection con = null;
try {
con = DBCon.getConnection();
//list = uDao.getUserQuery(con);
totalCount = gDao.getGroupsCount(con);
} catch (Exception e) {
e.printStackTrace();
}finally{
try {
if(con!=null){con.close();}
} catch (Exception e) {e.printStackTrace();}
}
return totalCount;
}private groupsBiz gBiz = new groupsBiz();
public ActionForward groupsQuery(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)throws Exception{
int start = Integer.parseInt(request.getParameter("start"));
int end = Integer.parseInt(request.getParameter("limit"));
System.out.println("start"+start);
List groups = gBiz.getUserQuery(start,end);
int totalCount = gBiz.getGroupsCount();
/*
int pager = Integer.valueOf(start);
List groups = gBiz.getUserQuery();
List list =new ArrayList();
if(pager==0){
if(groups.size()>5){
for(int i=0;i<5;i++){
list.add(groups.get(i));
}
}else{
for(int i=0;i<groups.size();i++){
list.add(groups.get(i));
}
}
}else{
int num = pager+5;
if(groups.size()>num){
for(int i=pager; i<num;i++){
list.add(groups.get(i));
}
}else{
for(int i=pager; i<groups.size();i++){
list.add(groups.get(i));
}
}
}
*/
JSONObject jsonObject = ExtHelper.getJsonFromList(totalCount,groups);
System.out.println("json :"+jsonObject);
response.setContentType("text/jsom;charset=UTF-8");
response.getWriter().write(jsonObject.toString());
return null;
}