Ext JS 4 CRUD example
- Wednesday, June 4, 2014, 18:22
- ExtJS
- 21,999 views
While writing my Spring-Hibernate Integration post I realize that we (as a java developer) have so many frameworks available which can make life easy by rapidly developing so many common things using frameworks. This ease of development is not available in java particularly when you considering UI development, we still have to struggle with old, bad looking jsp with combination of css, jquery.
Thanks god we now have so many javascript toolkit, framework which make developers life easy by offering so many ready-to-use widgets. ExtJS is the most advanced among those client side UI frameworks.
Today I am going to demonstrate you ‘How you can leverage ExtJS 4 to create CRUD application’. In the next post I will try to use the same JS code with Spring MVC as a backend.
Create a HTML page which include ExtJS library and aur books.js file.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 |
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8" /> <title>ExtJS CRUD App</title> <link rel="stylesheet" type="text/css" href="http://cdn.sencha.com/ext/gpl/4.2.0/resources/css/ext-all.css"> <script type="text/javascript" src="http://cdn.sencha.com/ext/gpl/4.2.0/ext-all.js"></script> <style> .book-add { background-image:url('images/book_add.png');} div#output {margin:100px;} </style> <script type="text/javascript" src="books.js"></script> </head> <body> <div id="output"></div> </body> </html> |
Here is the ExtJS CRUD code, I have combined it in a single file. You can follow the ExtJS 4 MVC folder structure.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 |
Ext.onReady(function () { Ext.define('TechZoo.model.Book', { extend: 'Ext.data.Model', fields: [ {name: 'title', type: 'string'}, {name: 'author', type: 'string'}, {name: 'price', type: 'int'}, {name: 'qty', type: 'int'} ] }); Ext.define('TechZoo.store.Books', { extend : 'Ext.data.Store', model : 'TechZoo.model.Book', fields : ['title', 'author','price', 'qty'], data : [ { title: 'JDBC, Servlet and JSP', author: 'Santosh Kumar', price: 300, qty : 12000 }, { title: 'Head First Java', author: 'Kathy Sierra', price: 550, qty : 2500 }, { title: 'Java SCJP Certification', author: 'Khalid Mughal', price: 650, qty : 5500 }, { title: 'Spring and Hinernate', author: 'Santosh Kumar', price: 350, qty : 2500 }, { title: 'Mastering C++', author: 'K. R. Venugopal', price: 400, qty : 1200 } ] }); Ext.define('TechZoo.view.BooksList', { extend: 'Ext.grid.Panel', alias: 'widget.bookslist', title: 'Books List - (ExtJS 4 CRUD example - @ Tousif Khan)', store: 'Books', initComponent: function () { this.tbar = [{ text : 'Add Book', action : 'add', iconCls : 'book-add' }]; this.columns = [ { header: 'Title', dataIndex: 'title', flex: 1 }, { header: 'Author', dataIndex: 'author' }, { header: 'Price', dataIndex: 'price' , width: 60 }, { header: 'Quantity', dataIndex: 'qty', width: 80 }, { header: 'Action', width: 50, renderer: function (v, m, r) { var id = Ext.id(); var max = 15; Ext.defer(function () { Ext.widget('image', { renderTo: id, name: 'delete', src : 'images/book_delete.png', listeners : { afterrender: function (me) { me.getEl().on('click', function() { var grid = Ext.ComponentQuery.query('bookslist')[0]; if (grid) { var sm = grid.getSelectionModel(); var rs = sm.getSelection(); if (!rs.length) { Ext.Msg.alert('Info', 'No Book Selected'); return; } Ext.Msg.confirm('Remove Book', 'Are you sure you want to delete?', function (button) { if (button == 'yes') { grid.store.remove(rs[0]); } }); } }); } } }); }, 50); return Ext.String.format('<div id="{0}"></div>', id); } } ]; this.callParent(arguments); } }); Ext.define('TechZoo.view.BooksForm', { extend : 'Ext.window.Window', alias : 'widget.booksform', title : 'Add Book', width : 350, layout : 'fit', resizable: false, closeAction: 'hide', modal : true, config : { recordIndex : 0, action : '' }, items : [{ xtype : 'form', layout: 'anchor', bodyStyle: { background: 'none', padding: '10px', border: '0' }, defaults: { xtype : 'textfield', anchor: '100%' }, items : [{ name : 'title', fieldLabel: 'Book Title' },{ name: 'author', fieldLabel: 'Author Name' },{ name: 'price', fieldLabel: 'Price' },{ name: 'qty', fieldLabel: 'Quantity' }] }], buttons: [{ text: 'OK', action: 'add' },{ text : 'Reset', handler : function () { this.up('window').down('form').getForm().reset(); } },{ text : 'Cancel', handler: function () { this.up('window').close(); } }] }); Ext.define('TechZoo.controller.Books', { extend : 'Ext.app.Controller', stores : ['Books'], views : ['BooksList', 'BooksForm'], refs : [{ ref : 'formWindow', xtype : 'booksform', selector: 'booksform', autoCreate: true }], init: function () { this.control({ 'bookslist > toolbar > button[action=add]': { click: this.showAddForm }, 'bookslist': { itemdblclick: this.onRowdblclick }, 'booksform button[action=add]': { click: this.doAddBook } }); }, onRowdblclick: function(me, record, item, index) { var win = this.getFormWindow(); win.setTitle('Edit Book'); win.setAction('edit'); win.setRecordIndex(index); win.down('form').getForm().setValues(record.getData()); win.show(); }, showAddForm: function () { var win = this.getFormWindow(); win.setTitle('Add Book'); win.setAction('add'); win.down('form').getForm().reset(); win.show(); }, doAddBook: function () { var win = this.getFormWindow(); var store = this.getBooksStore(); var values = win.down('form').getValues(); var action = win.getAction(); var book = Ext.create('TechZoo.model.Book', values); if(action == 'edit') { store.removeAt(win.getRecordIndex()); store.insert(win.getRecordIndex(), book); } else { store.add(book); } win.close(); } }); Ext.application({ name : 'TechZoo', controllers: ['Books'], launch: function () { Ext.widget('bookslist', { width : 500, height: 300, renderTo: 'output' }); } } ); }); |
Output:
Open the HTML file in any browser, the Output will look similar to below. You can click to add new Book record in GRID.
Double click to any of the GRID row to edit the record.