EXT3整合struts2上传，中间解决了一些问题

extjs3文件上传需要引入FileUploadField.js和fileuploadfield.css这两个扩展文件（这两个文件可以在extjs3包中的examples/form下找到）

1.引入FileUploadField.js，源码如下：

/*!
* Ext JS Library 3.2.1
* Copyright(c) 2006-2010 Ext JS, Inc.
* licensing@extjs.com
* http://www.extjs.com/license
*/
Ext.ns('Ext.ux.form');

/**
* @class Ext.ux.form.FileUploadField
* @extends Ext.form.TextField
* Creates a file upload field.
* @xtype fileuploadfield
*/
Ext.ux.form.FileUploadField = Ext.extend(Ext.form.TextField, {
/**
* @cfg {String} buttonText The button text to display on the upload button (defaults to
* 'Browse...'). Note that if you supply a value for {@link #buttonCfg}, the buttonCfg.text
* value will be used instead if available.
*/
buttonText: 'Browse...',
/**
* @cfg {Boolean} buttonOnly True to display the file upload field as a button with no visible
* text field (defaults to false). If true, all inherited TextField members will still be available.
*/
buttonOnly: false,
/**
* @cfg {Number} buttonOffset The number of pixels of space reserved between the button and the text field
* (defaults to 3). Note that this only applies if {@link #buttonOnly} = false.
*/
buttonOffset: 3,
/**
* @cfg {Object} buttonCfg A standard {@link Ext.Button} config object.
*/

// private
readOnly: true,

/**
* @hide
* @method autoSize
*/
autoSize: Ext.emptyFn,

// private
initComponent: function(){
Ext.ux.form.FileUploadField.superclass.initComponent.call(this);

this.addEvents(
/**
* @event fileselected
* Fires when the underlying file input field's value has changed from the user
* selecting a new file from the system file selection dialog.
* @param {Ext.ux.form.FileUploadField} this
* @param {String} value The file value returned by the underlying file input field
*/
'fileselected'
);
},

// private
onRender : function(ct, position){
Ext.ux.form.FileUploadField.superclass.onRender.call(this, ct, position);

this.wrap = this.el.wrap({cls:'x-form-field-wrap x-form-file-wrap'});
this.el.addClass('x-form-file-text');
this.el.dom.removeAttribute('name');
this.createFileInput();

var btnCfg = Ext.applyIf(this.buttonCfg || {}, {
text: this.buttonText
});
this.button = new Ext.Button(Ext.apply(btnCfg, {
renderTo: this.wrap,
cls: 'x-form-file-btn' + (btnCfg.iconCls ? ' x-btn-icon' : '')
}));

if(this.buttonOnly){
this.el.hide();
this.wrap.setWidth(this.button.getEl().getWidth());
}

this.bindListeners();
this.resizeEl = this.positionEl = this.wrap;
},

bindListeners: function(){
this.fileInput.on({
scope: this,
mouseenter: function() {
this.button.addClass(['x-btn-over','x-btn-focus'])
},
mouseleave: function(){
this.button.removeClass(['x-btn-over','x-btn-focus','x-btn-click'])
},
mousedown: function(){
this.button.addClass('x-btn-click')
},
mouseup: function(){
this.button.removeClass(['x-btn-over','x-btn-focus','x-btn-click'])
},
change: function(){
var v = this.fileInput.dom.value;
this.setValue(v);
this.fireEvent('fileselected', this, v);
}
});
},

createFileInput : function() {
this.fileInput = this.wrap.createChild({
id: this.getFileInputId(),
name: this.name||this.getId(),
cls: 'x-form-file',
tag: 'input',
type: 'file',
size: 1
});
},

reset : function(){
this.fileInput.remove();
this.createFileInput();
this.bindListeners();
Ext.ux.form.FileUploadField.superclass.reset.call(this);
},

// private
getFileInputId: function(){
return this.id + '-file';
},

// private
onResize : function(w, h){
Ext.ux.form.FileUploadField.superclass.onResize.call(this, w, h);

this.wrap.setWidth(w);

if(!this.buttonOnly){
var w = this.wrap.getWidth() - this.button.getEl().getWidth() - this.buttonOffset;
this.el.setWidth(w);
}
},

// private
onDestroy: function(){
Ext.ux.form.FileUploadField.superclass.onDestroy.call(this);
Ext.destroy(this.fileInput, this.button, this.wrap);
},

onDisable: function(){
Ext.ux.form.FileUploadField.superclass.onDisable.call(this);
this.doDisable(true);
},

onEnable: function(){
Ext.ux.form.FileUploadField.superclass.onEnable.call(this);
this.doDisable(false);

},

// private
doDisable: function(disabled){
this.fileInput.dom.disabled = disabled;
this.button.setDisabled(disabled);
},

// private
preFocus : Ext.emptyFn,

// private
alignErrorIcon : function(){
this.errorIcon.alignTo(this.wrap, 'tl-tr', [2, 0]);
}

});

Ext.reg('fileuploadfield', Ext.ux.form.FileUploadField);

// backwards compat
Ext.form.FileUploadField = Ext.ux.form.FileUploadField;

2.引入fileuploadfield.css，代码如下：

/*!
* Ext JS Library 3.2.1
* Copyright(c) 2006-2010 Ext JS, Inc.
* licensing@extjs.com
* http://www.extjs.com/license
*/
/*
* FileUploadField component styles
*/

/*图片自己去ext包中寻找，然后按照自己的目录放置*/
.upload-icon {
background: url('../images/image_add.png') no-repeat 0 0 !important;
}
.x-form-file-wrap {
position: relative;
height: 22px;
}
.x-form-file-wrap .x-form-file {
position: absolute;
right: 0;
-moz-opacity: 0;
filter:alpha(opacity: 0);
opacity: 0;
z-index: 2;
height: 22px;
}
.x-form-file-wrap .x-form-file-btn {
position: absolute;
right: 0;
z-index: 1;
}
.x-form-file-wrap .x-form-file-text {
position: absolute;
left: 0;
z-index: 3;
color: #777;
}

3.JSP引入以上两个文件

/*文件路径自己设置*/

4.js代码

//Ext.getCmp('addAppInfo').close();//®此次不能放该语句

}
}
},{
text: '取消',
handler:function(){
Ext.getCmp('addAppInfo').close();
}
}]
})
}).show();
Ext.getCmp("addAppInfo").show();
}

以上是我的代码，

问题二：上传成功后，返回成功不正确，然后查问题，发现返回的是数据是application/json格式，网上查了很多，让后台设置response.setContentType("text/html; charset=utf-8");

发现并没有效果，最后选择在struts配置文件配置<param name="contentType">text/html</param>，返回{"success":true}成功

- 后台代码就不发了，只要能获取到流，相信大家不会有问题。

posted @ 2015-01-16 10:25 tangpu1987 阅读(226) 评论(0) 编辑收藏举报

tangpu1987

EXT3整合struts2上传，中间解决了一些问题

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