我创建了一个用 Spring MVC3、Hibernate 和 Ext Js 设计的应用程序。这是一个图书馆。我使用 Eclipse IDE。在 WebContent 文件夹中，我创建了名为 app 的 extjs 应用程序，在那里我也上传了 extjs 文件。我的应用程序包含 4 个包：控制器、模型、存储和视图。
控制器 Books.js：
Ext.define('ExtJS.controller.Books', {
extend: 'Ext.app.Controller',
stores: ['Books'],
models: ['Book'],
views: ['book.Edit', 'book.List'],
refs: [{
ref: 'booksPanel',
selector: 'panel'
},{
ref: 'booklist',
selector: 'booklist'
}
],
init: function() {
this.control({
'booklist dataview': {
itemdblclick: this.editUser
},
'booklist button[action=add]': {
click: this.editUser
},
'booklist button[action=delete]': {
click: this.deleteUser
},
'bookedit button[action=save]': {
click: this.updateUser
}
});
},
editUser: function(grid, record) {
var edit = Ext.create('ExtJS.view.book.Edit').show();
if(record){
edit.down('form').loadRecord(record);
}
},
updateUser: function(button) {
var win = button.up('window'),
form = win.down('form'),
record = form.getRecord(),
values = form.getValues();
if (values.id > 0){
record.set(values);
} else{
record = Ext.create('ExtJS.model.Book');
record.set(values);
record.setId(0);
this.getBooksStore().add(record);
}
win.close();
this.getBooksStore().sync();
},
deleteUser: function(button) {
var grid = this.getBooklist(),
record = grid.getSelectionModel().getSelection(),
store = this.getBooksStore();
store.remove(record);
this.getBooksStore().sync();
}
});
模型书.js：
Ext.define('ExtJS.model.Book', {
extend: 'Ext.data.Model',
fields: ['id', 'title', 'author', 'publisher', 'isbn', 'pages', 'category', 'qty']
});
存储 Books.js：
Ext.define('ExtJS.store.Books', {
extend: 'Ext.data.Store',
model: 'ExtJS.model.Book',
autoLoad: true,
pageSize: 35,
autoLoad: {start: 0, limit: 35},
proxy: {
type: 'ajax',
api: {
read : 'books/view.action',
create : 'books/create.action',
update: 'books/update.action',
destroy: 'books/delete.action'
},
reader: {
type: 'json',
root: 'data',
successProperty: 'success'
},
writer: {
type: 'json',
writeAllFields: true,
encode: false,
root: 'data'
},
listeners: {
exception: function(proxy, response, operation){
Ext.MessageBox.show({
title: 'REMOTE EXCEPTION',
msg: operation.getError(),
icon: Ext.MessageBox.ERROR,
buttons: Ext.Msg.OK
});
}
}
}
});
View 包含 Viewport.js：
Ext.define('ExtJS.view.Viewport', {
extend: 'Ext.container.Viewport'
});
和一个名为 book 的文件夹，我有：
列表.js：
Ext.define('ExtJS.view.book.List' ,{
extend: 'Ext.grid.Panel',
alias : 'widget.booklist',
//requires: ['Ext.toolbar.Paging'],
iconCls: 'icon-grid',
title : 'Books',
store: 'Books',
columns: [{
header: "Title",
width: 50,
flex:1,
dataIndex: 'title'
},{
header: "Author",
width: 50,
flex:1,
dataIndex: 'author'
},{
header: "Publisher",
width: 50,
flex:1,
dataIndex: 'publisher'
},{
header: "Isbn",
width: 50,
flex:1,
dataIndex: 'isbn'
},{
header: "Pages",
width: 50,
flex:1,
dataIndex: 'pages'
},{
header: "Category",
width: 50,
flex:1,
dataIndex: 'category'
},{
header: "Qty",
width: 50,
flex:1,
dataIndex: 'qty'
}],
initComponent: function() {
this.dockedItems = [{
xtype: 'toolbar',
items: [{
iconCls: 'icon-save',
itemId: 'add',
text: 'Add',
action: 'add'
},{
iconCls: 'icon-delete',
text: 'Delete',
action: 'delete'
}]
},
{
xtype: 'pagingtoolbar',
dock:'top',
store: 'Books',
displayInfo: true,
displayMsg: 'Displaying books {0} - {1} of {2}',
emptyMsg: "No books to display"
}];
this.callParent(arguments);
}
});
和
编辑.js：
Ext.define('ExtJS.view.book.Edit', {
extend: 'Ext.window.Window',
alias : 'widget.bookedit',
requires: ['Ext.form.Panel','Ext.form.field.Text'],
title : 'Edit Book',
layout: 'fit',
autoShow: true,
width: 280,
iconCls: 'icon-user',
initComponent: function() {
this.items = [
{
xtype: 'form',
padding: '5 5 0 5',
border: false,
style: 'background-color: #fff;',
fieldDefaults: {
anchor: '100%',
labelAlign: 'left',
allowBlank: false,
combineErrors: true,
msgTarget: 'side'
},
items: [
{
xtype: 'textfield',
name : 'id',
fieldLabel: 'id',
hidden:true
},
{
xtype: 'textfield',
name : 'title',
fieldLabel: 'Title'
},
{
xtype: 'textfield',
name : 'author',
fieldLabel: 'Author'
},
{
xtype: 'textfield',
name : 'publisher',
fieldLabel: 'Publisher'
},
{
xtype: 'textfield',
name : 'isbn',
fieldLabel: 'Isbn'
},
{
xtype: 'textfield',
name : 'pages',
fieldLabel: 'Pages'
},
{
xtype: 'textfield',
name : 'category',
fieldLabel: 'Category'
},
{
xtype: 'textfield',
name : 'qty',
fieldLabel: 'Qty'
}
]
}
];
this.dockedItems = [{
xtype: 'toolbar',
dock: 'bottom',
id:'buttons',
ui: 'footer',
items: ['->', {
iconCls: 'icon-save',
itemId: 'save',
text: 'Save',
action: 'save'
},{
iconCls: 'icon-reset',
text: 'Cancel',
scope: this,
handler: this.close
}]
}];
this.callParent(arguments);
}
});
我的 app.js：
Ext.application({
name: 'ExtJS',
controllers: [
'Books'
],
launch: function() {
Ext.create('Ext.container.Viewport', {
layout: 'fit',
items: [
{
xtype: 'booklist'
}
]
});
}
});
来自 store/Books.js 的错误“远程异常”被抛出。我不知道可能是什么问题。
编辑：
问题是：“从数据库中检索书籍时出错”。它来自Java控制器：
@Controller
公共类 BookController {
private BookService bookService;
@RequestMapping(value="/books/view.action")
public @ResponseBody Map<String,? extends Object> view(@RequestParam int start, @RequestParam int limit) throws Exception {
try{
List<Book> books = bookService.getBookList(start,limit);
int total = bookService.getTotalBooks();
return ExtJSReturn.mapOK(books, total);
} catch (Exception e) {
return ExtJSReturn.mapError("Error retrieving books from database.");
}
}
另请参见 BookService.java 方法：
@Transactional(readOnly=true)
public List<Book> getBookList(int start, int limit){
return bookDAO.getBooks(start, limit);
}
public int getTotalBooks(){
return bookDAO.getTotalBooks();
}
请参阅 BookDAO.java 方法：
@SuppressWarnings("unchecked")
public List<Book> getBooks(int start, int limit) {
DetachedCriteria criteria = DetachedCriteria.forClass(Book.class);
return hibernateTemplate.findByCriteria(criteria, start, limit);
}
public int getTotalBooks(){
return DataAccessUtils.intResult(hibernateTemplate.find("SELECT COUNT(*) FROM books"));
}
任何的想法？