校园选课助手【2】-重要的登录模块

miss writer2024-08-03 4:01

用户登录模块技术要点：

  1. 密码通过MD5加密传输
  2. 分布式session存储用户登录信息
  3. 自定义注解进行字段校验
  4. 自定义拦截器完成登录验证

下面依次给出代码和详细解释：

1.使用 MD5 二次加密用户登录信息，前端先通过密码加上盐进行MD5加密交给服务器，在userSeverice验证时再对此密码加盐进行一次MD5加密才和数据库中查询的密码对比；

登录页面前端代码：

bash 复制代码 
<!DOCTYPE html>
<html lang="en"
      xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>登录</title>
    <!-- jquery -->
    <script type="text/javascript" th:src="@{/js/jquery.min.js}"></script>
    <!-- bootstrap -->
    <link rel="stylesheet" type="text/css" th:href="@{/bootstrap/css/bootstrap.min.css}"/>
    <script type="text/javascript" th:src="@{/bootstrap/js/bootstrap.min.js}"></script>
    <!-- jquery-validator -->
    <script type="text/javascript" th:src="@{/jquery-validation/jquery.validate.min.js}"></script>
    <script type="text/javascript" th:src="@{/jquery-validation/localization/messages_zh.min.js}"></script>
    <!-- layer -->
    <script type="text/javascript" th:src="@{/layer/layer.js}"></script>
    <!-- md5.js -->
    <script type="text/javascript" th:src="@{/js/md5.min.js}"></script>
    <!-- common.js -->
    <script type="text/javascript" th:src="@{/js/common.js}"></script>
</head>
<body>
<form name="loginForm" id="loginForm" method="post" style="width:50%; margin:0 auto">

    <h2 style="text-align:center; margin-bottom: 20px">用户登录</h2>

    <div class="form-group">
        <div class="row">
            <label class="form-label col-md-4">请输入手机号码</label>
            <div class="col-md-5">
                <input id="mobile" name="mobile" class="form-control" type="text" placeholder="手机号码" required="true"
                />
                <!--             取消位数限制          minlength="11" maxlength="11"-->
            </div>
            <div class="col-md-1">
            </div>
        </div>
    </div>

    <div class="form-group">
        <div class="row">
            <label class="form-label col-md-4">请输入密码</label>
            <div class="col-md-5">
                <input id="password" name="password" class="form-control" type="password" placeholder="密码"
                       required="true"
                />
                <!--             取消位数限制            minlength="6" maxlength="16"-->
            </div>
        </div>
    </div>

    <div class="row">
        <div class="col-md-5">
            <button class="btn btn-primary btn-block" type="reset" onclick="reset()">重置</button>
        </div>
        <div class="col-md-5">
            <button class="btn btn-primary btn-block" type="submit" onclick="login()">登录</button>
        </div>
    </div>
</form>
</body>
<script>
    function login() {
        $("#loginForm").validate({
            submitHandler: function (form) {
                doLogin();
            }
        });
    }

    function doLogin() {
        g_showLoading();

        var inputPass = $("#password").val();
        var salt = g_passsword_salt;
        var str = "" + salt.charAt(0) + salt.charAt(2) + inputPass + salt.charAt(5) + salt.charAt(4);
        var password = md5(str);

        $.ajax({
            url: "/login/doLogin",
            type: "POST",
            data: {
                mobile: $("#mobile").val(),
                password: password
            },
            success: function (data) {
                layer.closeAll();
                if (data.code == 200) {
                    layer.msg("成功");
                    console.log(data);
                    document.cookie = "userTicket=" + data.object;
                    window.location.href = "/goods/toList";
                } else {
                    layer.msg(data.message);
                }
            },
            error: function () {
                layer.closeAll();
            }
        });
    }
</script>
</html>

validate的JS代码：

bash 复制代码 
!function(a){"function"==typeof define&&define.amd?define(["jquery"],a):a(jQuery)}(function(a){a.extend(a.fn,{validate:function(b){if(!this.length)return void(b&&b.debug&&window.console&&console.warn("Nothing selected, can't validate, returning nothing."));var c=a.data(this[0],"validator");return c?c:(this.attr("novalidate","novalidate"),c=new a.validator(b,this[0]),a.data(this[0],"validator",c),c.settings.onsubmit&&(this.on("click.validate",":submit",function(b){c.settings.submitHandler&&(c.submitButton=b.target),a(this).hasClass("cancel")&&(c.cancelSubmit=!0),void 0!==a(this).attr("formnovalidate")&&(c.cancelSubmit=!0)}),this.on("submit.validate",function(b){function d(){var d,e;return c.settings.submitHandler?(c.submitButton&&(d=a("<input type='hidden'/>").attr("name",c.submitButton.name).val(a(c.submitButton).val()).appendTo(c.currentForm)),e=c.settings.submitHandler.call(c,c.currentForm,b),c.submitButton&&d.remove(),void 0!==e?e:!1):!0}return c.settings.debug&&b.preventDefault(),c.cancelSubmit?(c.cancelSubmit=!1,d()):c.form()?c.pendingRequest?(c.formSubmitted=!0,!1):d():(c.focusInvalid(),!1)})),c)},valid:function(){var b,c,d;return a(this[0]).is("form")?b=this.validate().form():(d=[],b=!0,c=a(this[0].form).validate(),this.each(function(){b=c.element(this)&&b,d=d.concat(c.errorList)}),c.errorList=d),b},rules:function(b,c){var d,e,f,g,h,i,j=this[0];if(b)switch(d=a.data(j.form,"validator").settings,e=d.rules,f=a.validator.staticRules(j),b){case"add":a.extend(f,a.validator.normalizeRule(c)),delete f.messages,e[j.name]=f,c.messages&&(d.messages[j.name]=a.extend(d.messages[j.name],c.messages));break;case"remove":return c?(i={},a.each(c.split(/\s/),function(b,c){i[c]=f[c],delete f[c],"required"===c&&a(j).removeAttr("aria-required")}),i):(delete e[j.name],f)}return 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long."),range:a.validator.format("Please enter a value between {0} and {1}."),max:a.validator.format("Please enter a value less than or equal to {0}."),min:a.validator.format("Please enter a value greater than or equal to {0}.")},autoCreateRanges:!1,prototype:{init:function(){function b(b){var c=a.data(this.form,"validator"),d="on"+b.type.replace(/^validate/,""),e=c.settings;e[d]&&!a(this).is(e.ignore)&&e[d].call(c,this,b)}this.labelContainer=a(this.settings.errorLabelContainer),this.errorContext=this.labelContainer.length&&this.labelContainer||a(this.currentForm),this.containers=a(this.settings.errorContainer).add(this.settings.errorLabelContainer),this.submitted={},this.valueCache={},this.pendingRequest=0,this.pending={},this.invalid={},this.reset();var c,d=this.groups={};a.each(this.settings.groups,function(b,c){"string"==typeof c&&(c=c.split(/\s/)),a.each(c,function(a,c){d[c]=b})}),c=this.settings.rules,a.each(c,function(b,d){c[b]=a.validator.normalizeRule(d)}),a(this.currentForm).on("focusin.validate focusout.validate keyup.validate",":text, [type='password'], [type='file'], select, textarea, [type='number'], [type='search'], [type='tel'], [type='url'], [type='email'], [type='datetime'], [type='date'], [type='month'], [type='week'], [type='time'], [type='datetime-local'], [type='range'], [type='color'], [type='radio'], [type='checkbox']",b).on("click.validate","select, option, [type='radio'], [type='checkbox']",b),this.settings.invalidHandler&&a(this.currentForm).on("invalid-form.validate",this.settings.invalidHandler),a(this.currentForm).find("[required], [data-rule-required], .required").attr("aria-required","true")},form:function(){return 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b)})}this.settings.showErrors?this.settings.showErrors.call(this,this.errorMap,this.errorList):this.defaultShowErrors()},resetForm:function(){a.fn.resetForm&&a(this.currentForm).resetForm(),this.submitted={},this.lastElement=null,this.prepareForm(),this.hideErrors();var b,c=this.elements().removeData("previousValue").removeAttr("aria-invalid");if(this.settings.unhighlight)for(b=0;c[b];b++)this.settings.unhighlight.call(this,c[b],this.settings.errorClass,"");else c.removeClass(this.settings.errorClass)},numberOfInvalids:function(){return this.objectLength(this.invalid)},objectLength:function(a){var b,c=0;for(b in a)c++;return c},hideErrors:function(){this.hideThese(this.toHide)},hideThese:function(a){a.not(this.containers).text(""),this.addWrapper(a).hide()},valid:function(){return 0===this.size()},size:function(){return this.errorList.length},focusInvalid:function(){if(this.settings.focusInvalid)try{a(this.findLastActive()||this.errorList.length&&this.errorList[0].element||[]).filter(":visible").focus().trigger("focusin")}catch(b){}},findLastActive:function(){var b=this.lastActive;return b&&1===a.grep(this.errorList,function(a){return a.element.name===b.name}).length&&b},elements:function(){var b=this,c={};return a(this.currentForm).find("input, select, textarea").not(":submit, :reset, :image, :disabled").not(this.settings.ignore).filter(function(){return!this.name&&b.settings.debug&&window.console&&console.error("%o has no name assigned",this),this.name in c||!b.objectLength(a(this).rules())?!1:(c[this.name]=!0,!0)})},clean:function(b){return a(b)[0]},errors:function(){var b=this.settings.errorClass.split(" ").join(".");return a(this.settings.errorElement+"."+b,this.errorContext)},reset:function(){this.successList=[],this.errorList=[],this.errorMap={},this.toShow=a([]),this.toHide=a([]),this.currentElements=a([])},prepareForm:function(){this.reset(),this.toHide=this.errors().add(this.containers)},prepareElement:function(a){this.reset(),this.toHide=this.errorsFor(a)},elementValue:function(b){var c,d=a(b),e=b.type;return"radio"===e||"checkbox"===e?this.findByName(b.name).filter(":checked").val():"number"===e&&"undefined"!=typeof b.validity?b.validity.badInput?!1:d.val():(c=d.val(),"string"==typeof c?c.replace(/\r/g,""):c)},check:function(b){b=this.validationTargetFor(this.clean(b));var c,d,e,f=a(b).rules(),g=a.map(f,function(a,b){return b}).length,h=!1,i=this.elementValue(b);for(d in f){e={method:d,parameters:f[d]};try{if(c=a.validator.methods[d].call(this,i,b,e.parameters),"dependency-mismatch"===c&&1===g){h=!0;continue}if(h=!1,"pending"===c)return void(this.toHide=this.toHide.not(this.errorsFor(b)));if(!c)return this.formatAndAdd(b,e),!1}catch(j){throw this.settings.debug&&window.console&&console.log("Exception occurred when checking element "+b.id+", check the '"+e.method+"' method.",j),j instanceof TypeError&&(j.message+=".  Exception occurred when checking element "+b.id+", check the '"+e.method+"' method."),j}}if(!h)return this.objectLength(f)&&this.successList.push(b),!0},customDataMessage:function(b,c){return a(b).data("msg"+c.charAt(0).toUpperCase()+c.substring(1).toLowerCase())||a(b).data("msg")},customMessage:function(a,b){var c=this.settings.messages[a];return c&&(c.constructor===String?c:c[b])},findDefined:function(){for(var a=0;a<arguments.length;a++)if(void 0!==arguments[a])return arguments[a];return void 0},defaultMessage:function(b,c){return this.findDefined(this.customMessage(b.name,c),this.customDataMessage(b,c),!this.settings.ignoreTitle&&b.title||void 0,a.validator.messages[c],"<strong>Warning: No message defined for "+b.name+"</strong>")},formatAndAdd:function(b,c){var d=this.defaultMessage(b,c.method),e=/\$?\{(\d+)\}/g;"function"==typeof d?d=d.call(this,c.parameters,b):e.test(d)&&(d=a.validator.format(d.replace(e,"{$1}"),c.parameters)),this.errorList.push({message:d,element:b,method:c.method}),this.errorMap[b.name]=d,this.submitted[b.name]=d},addWrapper:function(a){return this.settings.wrapper&&(a=a.add(a.parent(this.settings.wrapper))),a},defaultShowErrors:function(){var a,b,c;for(a=0;this.errorList[a];a++)c=this.errorList[a],this.settings.highlight&&this.settings.highlight.call(this,c.element,this.settings.errorClass,this.settings.validClass),this.showLabel(c.element,c.message);if(this.errorList.length&&(this.toShow=this.toShow.add(this.containers)),this.settings.success)for(a=0;this.successList[a];a++)this.showLabel(this.successList[a]);if(this.settings.unhighlight)for(a=0,b=this.validElements();b[a];a++)this.settings.unhighlight.call(this,b[a],this.settings.errorClass,this.settings.validClass);this.toHide=this.toHide.not(this.toShow),this.hideErrors(),this.addWrapper(this.toShow).show()},validElements:function(){return this.currentElements.not(this.invalidElements())},invalidElements:function(){return a(this.errorList).map(function(){return this.element})},showLabel:function(b,c){var d,e,f,g=this.errorsFor(b),h=this.idOrName(b),i=a(b).attr("aria-describedby");g.length?(g.removeClass(this.settings.validClass).addClass(this.settings.errorClass),g.html(c)):(g=a("<"+this.settings.errorElement+">").attr("id",h+"-error").addClass(this.settings.errorClass).html(c||""),d=g,this.settings.wrapper&&(d=g.hide().show().wrap("<"+this.settings.wrapper+"/>").parent()),this.labelContainer.length?this.labelContainer.append(d):this.settings.errorPlacement?this.settings.errorPlacement(d,a(b)):d.insertAfter(b),g.is("label")?g.attr("for",h):0===g.parents("label[for='"+h+"']").length&&(f=g.attr("id").replace(/(:|\.|\[|\]|\$)/g,"\\$1"),i?i.match(new RegExp("\\b"+f+"\\b"))||(i+=" "+f):i=f,a(b).attr("aria-describedby",i),e=this.groups[b.name],e&&a.each(this.groups,function(b,c){c===e&&a("[name='"+b+"']",this.currentForm).attr("aria-describedby",g.attr("id"))}))),!c&&this.settings.success&&(g.text(""),"string"==typeof this.settings.success?g.addClass(this.settings.success):this.settings.success(g,b)),this.toShow=this.toShow.add(g)},errorsFor:function(b){var c=this.idOrName(b),d=a(b).attr("aria-describedby"),e="label[for='"+c+"'], label[for='"+c+"'] *";return d&&(e=e+", #"+d.replace(/\s+/g,", #")),this.errors().filter(e)},idOrName:function(a){return this.groups[a.name]||(this.checkable(a)?a.name:a.id||a.name)},validationTargetFor:function(b){return this.checkable(b)&&(b=this.findByName(b.name)),a(b).not(this.settings.ignore)[0]},checkable:function(a){return/radio|checkbox/i.test(a.type)},findByName:function(b){return a(this.currentForm).find("[name='"+b+"']")},getLength:function(b,c){switch(c.nodeName.toLowerCase()){case"select":return a("option:selected",c).length;case"input":if(this.checkable(c))return this.findByName(c.name).filter(":checked").length}return b.length},depend:function(a,b){return this.dependTypes[typeof a]?this.dependTypes[typeof a](a,b):!0},dependTypes:{"boolean":function(a){return a},string:function(b,c){return!!a(b,c.form).length},"function":function(a,b){return a(b)}},optional:function(b){var c=this.elementValue(b);return!a.validator.methods.required.call(this,c,b)&&"dependency-mismatch"},startRequest:function(a){this.pending[a.name]||(this.pendingRequest++,this.pending[a.name]=!0)},stopRequest:function(b,c){this.pendingRequest--,this.pendingRequest<0&&(this.pendingRequest=0),delete this.pending[b.name],c&&0===this.pendingRequest&&this.formSubmitted&&this.form()?(a(this.currentForm).submit(),this.formSubmitted=!1):!c&&0===this.pendingRequest&&this.formSubmitted&&(a(this.currentForm).triggerHandler("invalid-form",[this]),this.formSubmitted=!1)},previousValue:function(b){return a.data(b,"previousValue")||a.data(b,"previousValue",{old:null,valid:!0,message:this.defaultMessage(b,"remote")})},destroy:function(){this.resetForm(),a(this.currentForm).off(".validate").removeData("validator")}},classRuleSettings:{required:{required:!0},email:{email:!0},url:{url:!0},date:{date:!0},dateISO:{dateISO:!0},number:{number:!0},digits:{digits:!0},creditcard:{creditcard:!0}},addClassRules:function(b,c){b.constructor===String?this.classRuleSettings[b]=c:a.extend(this.classRuleSettings,b)},classRules:function(b){var c={},d=a(b).attr("class");return d&&a.each(d.split(" "),function(){this in a.validator.classRuleSettings&&a.extend(c,a.validator.classRuleSettings[this])}),c},normalizeAttributeRule:function(a,b,c,d){/min|max/.test(c)&&(null===b||/number|range|text/.test(b))&&(d=Number(d),isNaN(d)&&(d=void 0)),d||0===d?a[c]=d:b===c&&"range"!==b&&(a[c]=!0)},attributeRules:function(b){var c,d,e={},f=a(b),g=b.getAttribute("type");for(c in a.validator.methods)"required"===c?(d=b.getAttribute(c),""===d&&(d=!0),d=!!d):d=f.attr(c),this.normalizeAttributeRule(e,g,c,d);return e.maxlength&&/-1|2147483647|524288/.test(e.maxlength)&&delete e.maxlength,e},dataRules:function(b){var c,d,e={},f=a(b),g=b.getAttribute("type");for(c in a.validator.methods)d=f.data("rule"+c.charAt(0).toUpperCase()+c.substring(1).toLowerCase()),this.normalizeAttributeRule(e,g,c,d);return e},staticRules:function(b){var c={},d=a.data(b.form,"validator");return d.settings.rules&&(c=a.validator.normalizeRule(d.settings.rules[b.name])||{}),c},normalizeRules:function(b,c){return a.each(b,function(d,e){if(e===!1)return void delete b[d];if(e.param||e.depends){var f=!0;switch(typeof e.depends){case"string":f=!!a(e.depends,c.form).length;break;case"function":f=e.depends.call(c,c)}f?b[d]=void 0!==e.param?e.param:!0:delete b[d]}}),a.each(b,function(d,e){b[d]=a.isFunction(e)?e(c):e}),a.each(["minlength","maxlength"],function(){b[this]&&(b[this]=Number(b[this]))}),a.each(["rangelength","range"],function(){var c;b[this]&&(a.isArray(b[this])?b[this]=[Number(b[this][0]),Number(b[this][1])]:"string"==typeof b[this]&&(c=b[this].replace(/[\[\]]/g,"").split(/[\s,]+/),b[this]=[Number(c[0]),Number(c[1])]))}),a.validator.autoCreateRanges&&(null!=b.min&&null!=b.max&&(b.range=[b.min,b.max],delete b.min,delete b.max),null!=b.minlength&&null!=b.maxlength&&(b.rangelength=[b.minlength,b.maxlength],delete b.minlength,delete b.maxlength)),b},normalizeRule:function(b){if("string"==typeof b){var c={};a.each(b.split(/\s/),function(){c[this]=!0}),b=c}return b},addMethod:function(b,c,d){a.validator.methods[b]=c,a.validator.messages[b]=void 0!==d?d:a.validator.messages[b],c.length<3&&a.validator.addClassRules(b,a.validator.normalizeRule(b))},methods:{required:function(b,c,d){if(!this.depend(d,c))return"dependency-mismatch";if("select"===c.nodeName.toLowerCase()){var e=a(c).val();return e&&e.length>0}return this.checkable(c)?this.getLength(b,c)>0:b.length>0},email:function(a,b){return this.optional(b)||/^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/.test(a)},url:function(a,b){return this.optional(b)||/^(?:(?:(?:https?|ftp):)?\/\/)(?:\S+(?::\S*)?@)?(?:(?!(?:10|127)(?:\.\d{1,3}){3})(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)(?:\.(?:[a-z\u00a1-\uffff0-9]-*)*[a-z\u00a1-\uffff0-9]+)*(?:\.(?:[a-z\u00a1-\uffff]{2,})).?)(?::\d{2,5})?(?:[/?#]\S*)?$/i.test(a)},date:function(a,b){return this.optional(b)||!/Invalid|NaN/.test(new Date(a).toString())},dateISO:function(a,b){return this.optional(b)||/^\d{4}[\/\-](0?[1-9]|1[012])[\/\-](0?[1-9]|[12][0-9]|3[01])$/.test(a)},number:function(a,b){return this.optional(b)||/^(?:-?\d+|-?\d{1,3}(?:,\d{3})+)?(?:\.\d+)?$/.test(a)},digits:function(a,b){return this.optional(b)||/^\d+$/.test(a)},creditcard:function(a,b){if(this.optional(b))return"dependency-mismatch";if(/[^0-9 \-]+/.test(a))return!1;var c,d,e=0,f=0,g=!1;if(a=a.replace(/\D/g,""),a.length<13||a.length>19)return!1;for(c=a.length-1;c>=0;c--)d=a.charAt(c),f=parseInt(d,10),g&&(f*=2)>9&&(f-=9),e+=f,g=!g;return e%10===0},minlength:function(b,c,d){var e=a.isArray(b)?b.length:this.getLength(b,c);return this.optional(c)||e>=d},maxlength:function(b,c,d){var e=a.isArray(b)?b.length:this.getLength(b,c);return this.optional(c)||d>=e},rangelength:function(b,c,d){var e=a.isArray(b)?b.length:this.getLength(b,c);return this.optional(c)||e>=d[0]&&e<=d[1]},min:function(a,b,c){return this.optional(b)||a>=c},max:function(a,b,c){return this.optional(b)||c>=a},range:function(a,b,c){return this.optional(b)||a>=c[0]&&a<=c[1]},equalTo:function(b,c,d){var e=a(d);return this.settings.onfocusout&&e.off(".validate-equalTo").on("blur.validate-equalTo",function(){a(c).valid()}),b===e.val()},remote:function(b,c,d){if(this.optional(c))return"dependency-mismatch";var e,f,g=this.previousValue(c);return this.settings.messages[c.name]||(this.settings.messages[c.name]={}),g.originalMessage=this.settings.messages[c.name].remote,this.settings.messages[c.name].remote=g.message,d="string"==typeof d&&{url:d}||d,g.old===b?g.valid:(g.old=b,e=this,this.startRequest(c),f={},f[c.name]=b,a.ajax(a.extend(!0,{mode:"abort",port:"validate"+c.name,dataType:"json",data:f,context:e.currentForm,success:function(d){var f,h,i,j=d===!0||"true"===d;e.settings.messages[c.name].remote=g.originalMessage,j?(i=e.formSubmitted,e.prepareElement(c),e.formSubmitted=i,e.successList.push(c),delete e.invalid[c.name],e.showErrors()):(f={},h=d||e.defaultMessage(c,"remote"),f[c.name]=g.message=a.isFunction(h)?h(b):h,e.invalid[c.name]=!0,e.showErrors(f)),g.valid=j,e.stopRequest(c,j)}},d)),"pending")}}});var b,c={};a.ajaxPrefilter?a.ajaxPrefilter(function(a,b,d){var e=a.port;"abort"===a.mode&&(c[e]&&c[e].abort(),c[e]=d)}):(b=a.ajax,a.ajax=function(d){var e=("mode"in d?d:a.ajaxSettings).mode,f=("port"in d?d:a.ajaxSettings).port;return"abort"===e?(c[f]&&c[f].abort(),c[f]=b.apply(this,arguments),c[f]):b.apply(this,arguments)})});

服务端登录controller代码：

bash 复制代码 
package com.example.seckilldemo.controller;

import com.example.seckilldemo.service.UserService;
import com.example.seckilldemo.vo.LoginVo;
import com.example.seckilldemo.vo.RespBean;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.validation.Valid;

/**
 * @Author wuyifan
 * @Date 2024/4/22 16:03
 * @Version 1.0
 */
@Controller
@RequestMapping("/login")
@Slf4j
public class LoginController {

    @Autowired
    private UserService userService;

    @RequestMapping("/toLogin")
    public  String toLogin(){
        return "login";
    }

/*  RequestMapping注解用于将HTTP请求映射到该方法上。
    当客户端发送一个URL为"/doLogin"的请求时Spring将调用这个方法来处理请求。*/
    @RequestMapping("/doLogin")
/*  @ResponseBody：这个注解表示该方法的返回值将直接作为HTTP响应的内容，
    而不是通过视图解析器进行渲染。通常用于返回JSON数据或其他格式的数据。*/
    @ResponseBody
/*    通过在LoginVo类的属性上添加校验规则注解（如@NotBlank、@Size等），可以对该对象的属性进行验证。
    当使用@Valid注解标记一个对象参数时，Spring会自动触发验证过程，检查该对象的属性是否满足校验规则。*/
    public RespBean doLogin(@Valid LoginVo loginVo, HttpServletRequest request,HttpServletResponse response){
        return userService.doLogin(loginVo, request, response);
    }

}

登录验证的service代码： 随机生成一个uuid作为key，将用户登陆信息使用Redis存储，将key作为cookie返回。

java 复制代码 
package com.example.seckilldemo.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.seckilldemo.exception.GlobalException;
import com.example.seckilldemo.mapper.UserMapper;
import com.example.seckilldemo.pojo.User;
import com.example.seckilldemo.service.UserService;
import com.example.seckilldemo.utils.*;
import com.example.seckilldemo.vo.LoginVo;
import com.example.seckilldemo.vo.RespBean;
import com.example.seckilldemo.vo.RespBeanEnum;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.thymeleaf.util.StringUtils;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @Author wuyifan
 * @Date 2024/4/22 15:57
 * @Version 1.0
 */
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private RedisTemplate<String,Object> redisTemplate;

    @Override
    public RespBean doLogin(LoginVo loginVo, HttpServletRequest request, HttpServletResponse response) {
        String mobile = loginVo.getMobile();
        String password = loginVo.getPassword();
        //使用自定义注解完成字段检验
//        if (StringUtils.isEmpty(mobile) || StringUtils.isEmpty(password)) {
//            return RespBean.error(RespBeanEnum.LOGIN_ERROR);
//        }
//        if(!ValidatorUtil.isMobile(mobile)){
//            return RespBean.error(RespBeanEnum.MOBILE_ERROR);
//        }

        User user = userMapper.selectById(mobile);
        if(null == user){
            log.error("查詢失敗");
//            return RespBean.error(RespBeanEnum.LOGIN_ERROR);
            throw new GlobalException(RespBeanEnum.LOGIN_ERROR);
        }

        if(!MD5Util.formPassToDBPass(password,user.getSalt()).equals(user.getPassword())){
//            return RespBean.error(RespBeanEnum.LOGIN_ERROR);
            throw new GlobalException(RespBeanEnum.LOGIN_ERROR);
        }

        //生成cookie
        String ticket = UUIDUtil.uuid();
        //将用户信息存入Redis中
        redisTemplate.opsForValue().set("user:"+ticket,user);
//        request.getSession().setAttribute(ticket,user);
        CookieUtil.setCookie(request,response,"userTicket",ticket);
//        System.out.println(CookieUtil.getCookieValue(request, "userTicket"));
        return RespBean.success(ticket);
    }

    @Override
    public RespBean updatePassword(String userTicket, String pwd, HttpServletResponse response, HttpServletRequest request) {
        User user = getUserByCookie(userTicket,request,response);
        if(user == null)
            throw new GlobalException(RespBeanEnum.MOBILE_NOT_EXIST);
        user.setPassword(MD5Util.inputPassToDBPass(pwd,user.getSalt()));
        int result = userMapper.updateById(user);
        if(1 == result){
            redisTemplate.delete("user:"+userTicket);
            return  RespBean.success();
        }
        return RespBean.error(RespBeanEnum.PASSWORD_UPDATE_FAIL);
    }

    @Override
    public User getUserByCookie(String userTicket, HttpServletRequest request, HttpServletResponse response) {
        if(StringUtils.isEmpty(userTicket))
            return null;
        User user = (User) redisTemplate.opsForValue().get("user:"+userTicket);
        if(user != null){
            CookieUtil.setCookie(request,response,"userTicket",userTicket);
        }
        return user;
    }

}

实现自定义拦截器方法：实现WebMvcConfigurer 接口，使得springMVC调用服务接口时进行用户身份解析

java 复制代码 
package com.example.seckilldemo.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.util.List;

/**
 * @Author wuyifan
 * @Date 2024/4/24 12:01
 * @Version 1.0
 */
@Configuration
//这个注解启用了Spring MVC的功能，用于处理Web请求和响应。
@EnableWebMvc
public class WebConfig implements WebMvcConfigurer {
    //UserArgumentResolver是一个自定义的参数解析器，用于解析请求中的用户信息。
    @Autowired
    UserArgumentResolver userArgumentResolver;

    @Autowired
    private AccessLimitInterceptor accessLimitInterceptor;

//    这个方法是WebMvcConfigurer接口的一个回调方法，用于添加自定义的参数解析器。
//    将userArgumentResolver添加到参数解析器列表中，以便在处理请求时使用该解析器解析用户信息。
    @Override
    public void addArgumentResolvers(List<HandlerMethodArgumentResolver> resolvers) {
            resolvers.add(userArgumentResolver);
    }

    /*    这个方法是WebMvcConfigurer接口的一个回调方法，用于添加拦截器。
    将accessLimitInterceptor添加到拦截器列表中，以便在请求处理之前进行接口限流的拦截。*/
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(accessLimitInterceptor);
    }

    //静态资源展示
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/**").addResourceLocations("classpath:/static/");
        //swagger 和 knife4j
        registry.addResourceHandler("swagger-ui.html").addResourceLocations("classpath:/META-INF/resources/");
        registry.addResourceHandler("doc.html").addResourceLocations("classpath:/META-INF/resources/");
        registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
    }

}

两种方法获取用户登录信息，一种是通过获取Redis里存储的用户信息；另一种是使用ThreadLocal获取用户信息(后面使用接口限流会给出方法)。

java 复制代码 
package com.example.seckilldemo.config;

import com.example.seckilldemo.pojo.User;
import com.example.seckilldemo.service.UserService;
import com.example.seckilldemo.utils.CookieUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.MethodParameter;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.ModelAndViewContainer;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @Author wuyifan
 * @Date 2024/4/24 12:05
 * @Version 1.0
 */
@Component
public class UserArgumentResolver implements HandlerMethodArgumentResolver {
    @Autowired
    private UserService userService;

    @Override
    public boolean supportsParameter(MethodParameter parameter) {
        Class<?> parameterType = parameter.getParameterType();
        return parameterType == User.class;
    }

    @Override
    public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
        HttpServletRequest nativeRequest = webRequest.getNativeRequest(HttpServletRequest.class);
        HttpServletResponse nativeResponse = webRequest.getNativeResponse(HttpServletResponse.class);
        String userTicket = CookieUtil.getCookieValue(nativeRequest, "userTicket");
        System.out.println("userTicket"+userTicket);
        if (StringUtils.isEmpty(userTicket)) {
            return null;
        }
        return  userService.getUserByCookie(userTicket,nativeRequest,nativeResponse);
       
    }
}
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