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锁定老帖子 主题:Extjs分页grid组件
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发表时间:2009-05-24
JS代码: Ext.onReady(function(){ Ext.lib.Ajax.defaultPostHeader += '; charset=UTF-8'; var sm = new Ext.grid.CheckboxSelectionModel(); var cm = new Ext.grid.ColumnModel([sm, new Ext.grid.RowNumberer(), {header:'编号',dataIndex:'id',sortable:true, editor:new Ext.grid.GridEditor(new Ext.form.TextField( { allowBlank:false }))}, {header:'城镇',dataIndex:'price',sortable:true,width:300, editor:new Ext.grid.GridEditor(new Ext.form.TextField( { allowBlank:false }))}, {header:'邮编',dataIndex:'sex',sortable:true,renderer:renderSex} ]); function renderSex(value) { if(value=='woman') { return "<span style='color:red'>"+value+"</span>"; } else { return "<img src='js/drop-yes.gif'/> <span style='color:greed'>"+value+"</span>"; } } var store= new Ext.data.Store({ proxy:new Ext.data.HttpProxy({url:'ExtjsServlet'}), reader:new Ext.data.JsonReader({ totalProperty:'totalProperty', root:'root' },[ {name:'id'}, {name:'price'}, {name:'sex'} ]) }); var grid = new Ext.grid.GridPanel({ renderTo:"right", store:store, cm:cm, // sm:new Ext.grid.RowSelectionModel({singleSelect:true}), loadMask:true, width:752, height:470, // bbar:new Ext.PagingToolbar({下面工具条 bbar:new Ext.PagingToolbar({ pageSize:10, store:store, displayInfo:true, displayMsg:'显示第{0}数据到{1},一共有{2}条', emptyMsg:'没有记录' }), tbar:[{ text: '删除', iconCls:'user', handler : function(){ //var record = grid.getSelectionModel().getSelected();// 返回值为 Record 类型 var rows = grid.getSelectionModel().getSelections();// 返回值为 Record 数组 for( var i=0;i<rows.length;i++){ store.remove(rows); } grid.view.refresh(); // this.getEl().dom.action='./formservlet?operator=save'; this.getEl().dom.submit(); }},{ text: '添加'}, { text: '修改' }, { text: '查询' }] }); store.load({params:{start:0,limit:10}}) Ext.get('remove').on("click",function(){ var rows = grid.getSelectionModel().getSelections();// 返回值为 Record 数组 for( var i=0;i<rows.length;i++){ store.remove(rows); } grid.view.refresh(); },this); // grid.render(); }); Servlet代码: public class ExtjsServlet extends HttpServlet { /* int ................ */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); int start =Integer.parseInt(request.getParameter("start")); int pageSize=Integer.parseInt(request.getParameter("limit")); System.out.println("分页servlet"); if(start==0){start=1;} String sql = "SELECT TOP "+pageSize+"* FROM county WHERE (id NOT IN ( SELECT TOP "+pageSize*(start-1)+"id FROM county ORDER BY id))ORDER BY id"; System.out.println(start+" "+pageSize); JdbcDB jb=new JdbcDB(); Connection conn=jb.getConnection(); StringBuilder s=jb.getResultSet(conn,sql); System.out.println(s.toString()); response.getWriter().write(s.toString()); jb.close(conn); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } public void init() throws ServletException { // Put your code here } } java代码: public class JdbcDB { /** * @param args * * */ public Connection getConnection(){ Connection conn = null; try{ Class.forName("net.sourceforge.jtds.jdbc.Driver"); conn = DriverManager.getConnection("jdbc:jtds:sqlserver://localhost:1433/zhoutie","sa","123"); }catch(Exception e){ e.printStackTrace(); } return conn; } public void close(Connection conn){ if(conn!=null){ try{ conn.close(); }catch(SQLException e){ e.printStackTrace(); } } } public StringBuilder getResultSet(Connection conn,String sql){ int n=this.getResulsetRow(conn); StringBuilder s= new StringBuilder("{totalProperty:"+n+",root:["); PreparedStatement pst = null; ResultSet rs = null; try{ pst = conn.prepareStatement(sql); rs = pst.executeQuery(); int i = 0; while(rs.next()) { i++; String a=String.valueOf(rs.getInt("countyid")); String c=rs.getString("county"); String b=String.valueOf(rs.getInt("fatherid")); // System.out.println(a); s.append("{id:'"+a+"',price:'"+c.trim()+"',sex:'"+b+"'}"); // System.out.println(rs.getString(2)); if(i<10) { s.append(","); } } } catch(SQLException e){ e.printStackTrace(); } s.append("]}"); return s; } public int getResulsetRow(Connection conn){ int n=0; Statement pst = null; ResultSet rs = null; try{ pst=conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY); rs=pst.executeQuery("select count(id) from county"); rs.next(); n=rs.getInt(1); System.out.println(n); }catch(SQLException e){ e.printStackTrace(); } return n; } public static void main(String[] args) { JdbcDB jb=new JdbcDB(); Connection conn=jb.getConnection(); String sql = "SELECT TOP "+10+"* FROM county WHERE (id NOT IN ( SELECT TOP "+10*(1-1)+"id FROM county ORDER BY id))ORDER BY id"; StringBuilder s=jb.getResultSet(conn ,sql); System.out.println(s.toString()); jb.close(conn); } } 声明:ITeye文章版权属于作者,受法律保护。没有作者书面许可不得转载。
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