我想出了一个非常好的简单的解决方案，它不会像其他解决方案那样阻止用户选择文本或复制粘贴。jQuery样式:)

$("input.inputPhone").keyup(function() {
    var jThis=$(this);
    var notNumber=new RegExp("[^0-9]","g");
    var val=jThis.val();

    //Math before replacing to prevent losing keyboard selection 
    if(val.match(notNumber))
    { jThis.val(val.replace(notNumber,"")); }
}).keyup(); //Trigger on page load to sanitize values set by server

$(document).on("keypress", ".classname", function(evt) {
    evt = (evt) ? evt : window.event;
    var charCode = (evt.which) ? evt.which : evt.keyCode;
    if (charCode > 31 && (charCode < 48 || charCode > 57)) {
        return false;
    }
    return true;
});

重构了已接受的答案，因此不再需要使用注释，因为我讨厌注释。这也更容易用茉莉花进行测试。

    allowBackspaceDeleteTabEscapeEnterPress: function(event){
    return ($.inArray(event.keyCode, [46, 8, 9, 27, 13, 190]) >= 0);
},
allowContorlAPress: function(event){
    return (event.keyCode == 65 && event.ctrlKey === true)
},
allowHomeEndLeftRightPress: function(event){
    return (event.keyCode >= 35 && event.keyCode <= 39)
},
theKeyPressedIsEditRelated: function (event) {
    return (this.allowBackspaceDeleteTabEscapeEnterPress(event)
            || this.allowContorlAPress(event)
            || this.allowHomeEndLeftRightPress(event));
},
isNotFromTheNumKeyPad: function (event) {
    return (event.keyCode < 96 || event.keyCode > 105);
},
isNotFromTopRowNumberKeys: function (event) {
    return (event.keyCode < 48 || event.keyCode > 57);
},
theKeyIsNonNumeric: function (event) {
   return (event.shiftKey
           || (this.isNotFromTopRowNumberKeys(event)
                && this.isNotFromTheNumKeyPad(event)));
},
bindInputValidator: function(){
    $('.myinputclassselector').keydown(function (event) {
        if(this.validateKeyPressEvent(event)) return false;
    });
},
validateKeyPressEvent: function(event){
    if(this.theKeyPressedIsEditRelated(event)){
        return;
    } else {
        if (this.theKeyIsNonNumeric(event)) {
            event.preventDefault();
        }
    }
}

如果你必须解决变音符和特殊字符，尝试使用这个:

$(this).on( 'keypress', function( e )
{
    // Ensure that it is a number and stop the keypress
    if (e.shiftKey || (e.keyCode < 48 || e.keyCode > 57)) {
        e.preventDefault();
    }
});  

如果有一个平滑的onlineer:

<input type="text" onkeypress="return /[0-9]/i.test(event.key)" >

我想出了一个非常好的简单的解决方案，它不会像其他解决方案那样阻止用户选择文本或复制粘贴。jQuery样式:)

$("input.inputPhone").keyup(function() {
    var jThis=$(this);
    var notNumber=new RegExp("[^0-9]","g");
    var val=jThis.val();

    //Math before replacing to prevent losing keyboard selection 
    if(val.match(notNumber))
    { jThis.val(val.replace(notNumber,"")); }
}).keyup(); //Trigger on page load to sanitize values set by server