开始的时候只是听说过ext,也不知道他是个怎样的东东.
现在用了,发现在这玩意确实很强大.在项目中用他做了个分页,挺好用.
帖出来代码共享一下.
1.页面要用到ext框架,必须先导入两个js文件和它自带的样式文件:
Js代码 ![复制代码]()
- <link rel="stylesheet" type="text/css" href="ext/resources/css/ext-all.css" />
- <script type="text/javascript" src="ext/adapter/ext/ext-base.js"></script>
- <script type="text/javascript" src="ext/ext-all.js"></script>
有了这三个以后就可以直接用了.
我用的是sqlserver数据库,分页可能和别的数据库的分页有差别.
先说说页面部分的.
2. Ext.onReady(function(){}这样就相当于在页面上写了个段javascript然后在<body>中onload调用的一样.
首先要得到一个JsonStore对象:
我用的是sqlserver数据库,分页可能和别的数据库的分页有差别.
先说说页面部分的.
2. Ext.onReady(function(){}这样就相当于在页面上写了个段javascript然后在<body>中onload调用的一样.
首先要得到一个JsonStore对象:
Js代码 ![复制代码]()
- var store=new Ext.data.JsonStore({
- url:"managerSystemUser.do",
- root:"data",
- fields:["userId","userName","userPhone","userMail","mobilePhone","userAddress"],
- totalProperty:"totalProperty"
- });
这里的参数url设置的就是你查询数据的action,root是和totalProperty这两个参数都是和action里的参数对应的,action里写的是什么这里就必须是.还有一个参数就是fields了,这个地方的参数都是和action里输出的那些参数对应的.
3.然后就是在页面上设置列了,得要一个ColumnModel对象.
3.然后就是在页面上设置列了,得要一个ColumnModel对象.
Js代码 ![复制代码]()
- var cm=new Ext.grid.ColumnModel([check,{
- header:"用户ID",
- dataIndex:"userId",
- sortable: true,
- type:"int"
- },{
- header:"用户名",
- dataIndex:"userName",
- sortable: true
- },{
- header:"用户电话",
- dataIndex:"userPhone"
- },{
- header:"用户邮箱",
- dataIndex:"userMail",
- width:150
- },{
- header:"用户手机",
- dataIndex:"mobilePhone",
- width:150
- },{
- header:"用户地址",
- dataIndex:"userAddress",
- width:200
- }]);
4.用了列以后就得有个地方来显示了,当然就少了不GridPanel.
Java代码 ![复制代码]()
- var grid=new Ext.grid.GridPanel({
- title:":::管理员信息维护:::",
- cm:cm,
- sm:check,
- store:store,
- autoWidth:true,
- height:400,
- bbar:bbar
- });
var grid=new Ext.grid.GridPanel({
title:":::管理员信息维护:::",
cm:cm,
sm:check,
store:store,
autoWidth:true,
height:400,
bbar:bbar
}); Js代码 ![复制代码]()
- var check=new Ext.grid.CheckboxSelectionModel({singleSelect :true});
Js代码 ![复制代码]()
- ([check,{
- header:"用户ID",
- dataIndex:"userId",
- sortable: true,
- type:"int"
现在就继续说GridPanel里参数,store设置的就是第二步里得到的那个store,autoWidth:true就是设置他的宽度为自动扩展,height:400设置的是他的高为400px,bbar设置的是分页工具栏.
Js代码 ![复制代码]()
- var bbar=new Ext.PagingToolbar({
- pageSize:15,
- store:store,
- beforePageText:"当前第",
- afterPageText:"页，共{0}页",
- lastText:"尾页",
- nextText :"下一页",
- prevText :"上一页",
- firstText :"首页",
- refreshText:"刷新页面",
- displayInfo: true,
- displayMsg:"当前显示 {0} - {1}条, 共 {2}
- });
4.现在数据也有了,网格也有了,分页工具栏也有了,列也有了,是不是还差个显示窗口呢.
Js代码 ![复制代码]()
- var win=new Ext.Window({
- closable:false,
- width:920,
- height:450,
- items:grid,
- maximizable:true
- }).show();
5.还有很重要的一步,就是要加载数据库:store.load();
现在页面的基本上就完成了,现在就剩下类中的处理了.
1.在action中首先得到PrintWriter out = response.getWriter();输出对象,
Java代码 ![复制代码]()
- int starts = new Integer(request.getParameter("start") == null ? "0"
- : request.getParameter("start"));
- int limit = 15;
int starts = new Integer(request.getParameter("start") == null ? "0"
: request.getParameter("start"));
int limit = 15;2.执行数据库的方法:
Java代码 ![复制代码]()
- public List getSysUser(int start,int limit) throws SQLException{
- String sql = "select top "+limit+" 用户id, 用户名称, 用户密码, 用户电话, 用户邮箱, " +
- " 用户手机,用户地址 from 用户信息 where 用户id not in" +
- " (select top "+start+" 用户id from 用户信息 order by 用户id desc ) order by 用户id desc";
- Connection conn =null;
- ResultSet rs = null;
- List<SystemUserVo> list = null;
- log.fine( "[query(sqlLabel)] sql : " + sql );
- try {
- conn = DbTool.getDs().getConnection();
- PreparedStatement pstm = conn.prepareStatement(sql);
- //pstm.setInt(1,start);
- //pstm.setInt(2,limit);
- rs = pstm.executeQuery();
- } catch (SQLException e) {
- e.printStackTrace();
- }
- if(null!=rs){
- list = new ArrayList<SystemUserVo>();
- while(rs.next()){
- SystemUserVo user = new SystemUserVo();
- user.setUserId(rs.getString(1));
- user.setUserName(rs.getString(2));
- user.setUserPhone(rs.getString(4));
- user.setUserEmail(rs.getString(5));
- user.setMobilePhone(rs.getString(6));
- user.setUserAddress(rs.getString(7));
- list.add(user);
- }
- }
- if(conn!=null){
- conn.close();
- }
- return list;
- }
public List getSysUser(int start,int limit) throws SQLException{
String sql = "select top "+limit+" 用户id, 用户名称, 用户密码, 用户电话, 用户邮箱, " +
" 用户手机,用户地址 from 用户信息 where 用户id not in" +
" (select top "+start+" 用户id from 用户信息 order by 用户id desc ) order by 用户id desc";
Connection conn =null;
ResultSet rs = null;
List<SystemUserVo> list = null;
log.fine( "[query(sqlLabel)] sql : " + sql );
try {
conn = DbTool.getDs().getConnection();
PreparedStatement pstm = conn.prepareStatement(sql);
//pstm.setInt(1,start);
//pstm.setInt(2,limit);
rs = pstm.executeQuery();
} catch (SQLException e) {
e.printStackTrace();
}
if(null!=rs){
list = new ArrayList<SystemUserVo>();
while(rs.next()){
SystemUserVo user = new SystemUserVo();
user.setUserId(rs.getString(1));
user.setUserName(rs.getString(2));
user.setUserPhone(rs.getString(4));
user.setUserEmail(rs.getString(5));
user.setMobilePhone(rs.getString(6));
user.setUserAddress(rs.getString(7));
list.add(user);
}
}
if(conn!=null){
conn.close();
}
return list;
}int count=0;
在dao中的方法:
Java代码 ![复制代码]()
- public int getSysUserCount(){
- String sql="select count(*) count from 用户信息";
- Connection conn =null;
- ResultSet rs = null;
- int count=0;
- try {
- conn = DbTool.getDs().getConnection();
- PreparedStatement pstm = conn.prepareStatement(sql);
- rs = pstm.executeQuery();
- if(rs.next()){
- count=rs.getInt(1);
- }
- } catch (SQLException e) {
- e.printStackTrace();
- }
- try {
- if(conn!=null){
- conn.close();
- }
- } catch (SQLException e) {
- e.printStackTrace();
- }
- return count;
- }
public int getSysUserCount(){
String sql="select count(*) count from 用户信息";
Connection conn =null;
ResultSet rs = null;
int count=0;
try {
conn = DbTool.getDs().getConnection();
PreparedStatement pstm = conn.prepareStatement(sql);
rs = pstm.executeQuery();
if(rs.next()){
count=rs.getInt(1);
}
} catch (SQLException e) {
e.printStackTrace();
}
try {
if(conn!=null){
conn.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
return count;
}Java代码 ![复制代码]()
- count=new BrowseSystemUser().getSysUserCount();
count=new BrowseSystemUser().getSysUserCount(); Java代码 ![复制代码]()
- if(list.size()<=0){//先决条件
- out.println("{totalProperty:0,data:[]}");
- return null;
- }
if(list.size()<=0){//先决条件
out.println("{totalProperty:0,data:[]}");
return null;
}5.如果有数据,就改拼json语句了:
Java代码 ![复制代码]()
- StringBuffer sb = new StringBuffer("{totalProperty:" + count
- + ",data:[");
- SystemUserVo sys = list.get(0);
- sb.append("{userId:"+sys.getUserId()+",userName:'" + sys.getUserName() + "',userPhone:'"
- + sys.getUserPhone() + "',userMail:'" + sys.getUserEmail()
- + "',mobilePhone:'" + sys.getMobilePhone() + "',userAddress:'"
- + sys.getUserAddress() + "'}");
- int size=list.size();
- for (int i = 1; i < size; i++) {
- SystemUserVo user = list.get(i);
- sb.append(",{userId:"+user.getUserId()+",userName:'" + new String(user.getUserName().getBytes()) + "',userPhone:'"
- + user.getUserPhone() + "',userMail:'" + user.getUserEmail()
- + "',mobilePhone:'" + user.getMobilePhone() + "',userAddress:'"
- + new String(user.getUserAddress().getBytes()) + "'}");
- }
- sb.append("]}");
- out.println(sb.toString());
- return null;
StringBuffer sb = new StringBuffer("{totalProperty:" + count
+ ",data:[");
SystemUserVo sys = list.get(0);
sb.append("{userId:"+sys.getUserId()+",userName:'" + sys.getUserName() + "',userPhone:'"
+ sys.getUserPhone() + "',userMail:'" + sys.getUserEmail()
+ "',mobilePhone:'" + sys.getMobilePhone() + "',userAddress:'"
+ sys.getUserAddress() + "'}");
int size=list.size();
for (int i = 1; i < size; i++) {
SystemUserVo user = list.get(i);
sb.append(",{userId:"+user.getUserId()+",userName:'" + new String(user.getUserName().getBytes()) + "',userPhone:'"
+ user.getUserPhone() + "',userMail:'" + user.getUserEmail()
+ "',mobilePhone:'" + user.getMobilePhone() + "',userAddress:'"
+ new String(user.getUserAddress().getBytes()) + "'}");
}
sb.append("]}");
out.println(sb.toString());
return null;
