我一直试图找出如何在我的Spring Webflow项目中创建textarea字段，我们正在使用Dojo（dijit）表单。有人可以帮忙吗下面是我的代码！
<td valign="top"><form:input path="bio" class="value" /> <script
type="text/javascript">
Spring.addDecoration(new Spring.ElementDecoration({
elementId : "name",
widgetType : "dijit.form.ValidationTextBox",
widgetAttrs : {
promptMessage : "Please enter your name from 2 to 10 characters",
invalidMessage : "A 2 to 10 characters value is required.",
required : true,
regExp : "^[a-zA-Z]{2,10}$"
}
}));
</script> <br />
<p></td>
答案 0 :(得分：3)
这应该有效：
<form:textarea id="bio" path="bio" />
<script type="text/javascript">
Spring.addDecoration(new Spring.ElementDecoration({
elementId : "bio",
widgetType : "dijit.form.SimpleTextarea",
</script>
[编辑]我刚检查过，textArea似乎没有任何验证，所以我根据ValidationTextBox为你创建了一个。
将它放在您的javascript文件中的某处：
dojo.provide("dijit.form.ValidationTextArea");
dojo.require("dojo.i18n");
dojo.require("dijit.form.TextBox");
dojo.require("dijit.Tooltip");
dojo.requireLocalization("dijit.form", "validate");
/*=====
dijit.form.ValidationTextBox.__Constraints = function(){
// locale: String
// locale used for validation, picks up value from this widget's lang attribute
// _flags_: anything
// various flags passed to regExpGen function
this.locale = "";
this._flags_ = "";
}
=====*/
dojo.declare(
"dijit.form.ValidationTextArea",
dijit.form.TextBox,
{
// summary:
// Base class for textbox widgets with the ability to validate content of various types and provide user feedback.
// tags:
// protected
templateString: "<textarea name=${name} ${nameAttrSetting} dojoAttachPoint='focusNode,containerNode,textbox' autocomplete='off'></textarea>",
baseClass: "dijitTextArea",
attributeMap: dojo.delegate(dijit.form._FormValueWidget.prototype.attributeMap, {
rows:"textbox", cols: "textbox"
}),
// rows: Number
// The number of rows of text.
rows: "3",
// rows: Number
// The number of characters per line.
cols: "20",
// required: Boolean
// User is required to enter data into this field.
required: false,
// promptMessage: String
// If defined, display this hint string immediately on focus to the textbox, if empty.
// Think of this like a tooltip that tells the user what to do, not an error message
// that tells the user what they've done wrong.
//
// Message disappears when user starts typing.
promptMessage: "",
// invalidMessage: String
// The message to display if value is invalid.
invalidMessage: "$_unset_$", // read from the message file if not overridden
// constraints: dijit.form.ValidationTextBox.__Constraints
// user-defined object needed to pass parameters to the validator functions
constraints: {},
// regExp: [extension protected] String
// regular expression string used to validate the input
// Do not specify both regExp and regExpGen
regExp: "(.|[\r\n])*",
regExpGen: function(/*dijit.form.ValidationTextBox.__Constraints*/constraints){
// summary:
// Overridable function used to generate regExp when dependent on constraints.
// Do not specify both regExp and regExpGen.
// tags:
// extension protected
return this.regExp; // String
},
// state: [readonly] String
// Shows current state (ie, validation result) of input (Normal, Warning, or Error)
state: "",
// tooltipPosition: String[]
// See description of `dijit.Tooltip.defaultPosition` for details on this parameter.
tooltipPosition: [],
_setValueAttr: function(){
// summary:
// Hook so attr('value', ...) works.
this.inherited(arguments);
this.validate(this._focused);
},
validator: function(/*anything*/value, /*dijit.form.ValidationTextBox.__Constraints*/constraints){
// summary:
// Overridable function used to validate the text input against the regular expression.
// tags:
// protected
return (new RegExp("^(?:" + this.regExpGen(constraints) + ")"+(this.required?"":"?")+"$")).test(value) &&
(!this.required || !this._isEmpty(value)) &&
(this._isEmpty(value) || this.parse(value, constraints) !== undefined); // Boolean
},
_isValidSubset: function(){
// summary:
// Returns true if the value is either already valid or could be made valid by appending characters.
// This is used for validation while the user [may be] still typing.
return this.textbox.value.search(this._partialre) == 0;
},
isValid: function(/*Boolean*/ isFocused){
// summary:
// Tests if value is valid.
// Can override with your own routine in a subclass.
// tags:
// protected
return this.validator(this.textbox.value, this.constraints);
},
_isEmpty: function(value){
// summary:
// Checks for whitespace
return /^\s*$/.test(value); // Boolean
},
getErrorMessage: function(/*Boolean*/ isFocused){
// summary:
// Return an error message to show if appropriate
// tags:
// protected
return this.invalidMessage; // String
},
getPromptMessage: function(/*Boolean*/ isFocused){
// summary:
// Return a hint message to show when widget is first focused
// tags:
// protected
return this.promptMessage; // String
},
_maskValidSubsetError: true,
validate: function(/*Boolean*/ isFocused){
// summary:
// Called by oninit, onblur, and onkeypress.
// description:
// Show missing or invalid messages if appropriate, and highlight textbox field.
// tags:
// protected
var message = "";
var isValid = this.disabled || this.isValid(isFocused);
if(isValid){ this._maskValidSubsetError = true; }
var isValidSubset = !isValid && isFocused && this._isValidSubset();
var isEmpty = this._isEmpty(this.textbox.value);
if(isEmpty){ this._maskValidSubsetError = true; }
this.state = (isValid || (!this._hasBeenBlurred && isEmpty) || isValidSubset) ? "" : "Error";
if(this.state == "Error"){ this._maskValidSubsetError = false; }
this._setStateClass();
dijit.setWaiState(this.focusNode, "invalid", isValid ? "false" : "true");
if(isFocused){
if(isEmpty){
message = this.getPromptMessage(true);
}
if(!message && (this.state == "Error" || (isValidSubset && !this._maskValidSubsetError))){
message = this.getErrorMessage(true);
}
}
this.displayMessage(message);
return isValid;
},
// _message: String
// Currently displayed message
_message: "",
displayMessage: function(/*String*/ message){
// summary:
// Overridable method to display validation errors/hints.
// By default uses a tooltip.
// tags:
// extension
if(this._message == message){ return; }
this._message = message;
dijit.hideTooltip(this.domNode);
if(message){
dijit.showTooltip(message, this.domNode, this.tooltipPosition);
}
},
_refreshState: function(){
// Overrides TextBox._refreshState()
this.validate(this._focused);
this.inherited(arguments);
},
//////////// INITIALIZATION METHODS ///////////////////////////////////////
constructor: function(){
this.constraints = {};
},
postMixInProperties: function(){
// Copy value from srcNodeRef, unless user specified a value explicitly (or there is no srcNodeRef)
if(!this.value && this.srcNodeRef){
this.value = this.srcNodeRef.value;
}
this.inherited(arguments);
this.constraints.locale = this.lang;
this.messages = dojo.i18n.getLocalization("dijit.form", "validate", this.lang);
if(this.invalidMessage == "$_unset_$"){ this.invalidMessage = this.messages.invalidMessage; }
var p = this.regExpGen(this.constraints);
this.regExp = p;
var partialre = "";
// parse the regexp and produce a new regexp that matches valid subsets
// if the regexp is .* then there's no use in matching subsets since everything is valid
if(p != ".*"){ this.regExp.replace(/\\.|\[\]|\[.*?[^\\]{1}\]|\{.*?\}|\(\?[=:!]|./g,
function (re){
switch(re.charAt(0)){
case '{':
case '+':
case '?':
case '*':
case '^':
case '$':
case '|':
case '(':
partialre += re;
break;
case ")":
partialre += "|$)";
break;
default:
partialre += "(?:"+re+"|$)";
break;
}
}
);}
try{ // this is needed for now since the above regexp parsing needs more test verification
"".search(partialre);
}catch(e){ // should never be here unless the original RE is bad or the parsing is bad
partialre = this.regExp;
console.warn('RegExp error in ' + this.declaredClass + ': ' + this.regExp);
} // should never be here unless the original RE is bad or the parsing is bad
this._partialre = "^(?:" + partialre + ")$";
},
filter: function(/*String*/ value){
// Override TextBox.filter to deal with newlines... specifically (IIRC) this is for IE which writes newlines
// as \r\n instead of just \n
if(value){
value = value.replace(/\r/g,"");
}
return this.inherited(arguments);
},
_setDisabledAttr: function(/*Boolean*/ value){
this.inherited(arguments); // call FormValueWidget._setDisabledAttr()
this._refreshState();
},
_setRequiredAttr: function(/*Boolean*/ value){
this.required = value;
dijit.setWaiState(this.focusNode,"required", value);
this._refreshState();
},
postCreate: function(){
if(dojo.isIE){ // IE INPUT tag fontFamily has to be set directly using STYLE
var s = dojo.getComputedStyle(this.focusNode);
if(s){
var ff = s.fontFamily;
if(ff){
this.focusNode.style.fontFamily = ff;
}
}
}
this.inherited(arguments);
if(dojo.isIE && this.cols){ // attribute selectors is not supported in IE6
dojo.addClass(this.textbox, "dijitTextAreaCols");
}
},
reset:function(){
// Overrides dijit.form.TextBox.reset() by also
// hiding errors about partial matches
this._maskValidSubsetError = true;
this.inherited(arguments);
},
_onBlur: function(){
this.displayMessage('');
this.inherited(arguments);
},
_previousValue: "",
_onInput: function(/*Event?*/ e){
// Override TextBox._onInput() to enforce maxLength restriction
if(this.maxLength){
var maxLength = parseInt(this.maxLength);
var value = this.textbox.value.replace(/\r/g,'');
var overflow = value.length - maxLength;
if(overflow > 0){
if(e){ dojo.stopEvent(e); }
var textarea = this.textbox;
if(textarea.selectionStart){
var pos = textarea.selectionStart;
var cr = 0;
if(dojo.isOpera){
cr = (this.textbox.value.substring(0,pos).match(/\r/g) || []).length;
}
this.textbox.value = value.substring(0,pos-overflow-cr)+value.substring(pos-cr);
textarea.setSelectionRange(pos-overflow, pos-overflow);
}else if(dojo.doc.selection){ //IE
textarea.focus();
var range = dojo.doc.selection.createRange();
// delete overflow characters
range.moveStart("character", -overflow);
range.text = '';
// show cursor
range.select();
}
}
this._previousValue = this.textbox.value;
}
this.inherited(arguments);
}
}
);
您可以像使用ValidationTextBox一样使用它，只需使用ValidationTextArea。