1. template中

<Button @click="changePsw">修改密码</Button>

 <Modal
                v-model="changePswData.changePswModel"
                :closable="false"
                :mask-closable="false"
                title="修改密码"
                @on-ok="changePswOk"
                @on-cancel="changePswCancel">
 <div style="margin-bottom: 5px;">
                <p style="display: inline-block; width: 100px;">原密码：</p>
                <Input type="password" :maxlength="20" v-model="changePswData.oldPsw" placeholder="请输入原密码..." style="width: 300px" @on-blur="oldPswValid" @on-focus="oldPswValid_focus"></Input>
                <p style="display: inline; color: red;margin-left: 110px;" :style="{display: changePswData.oldPsw_pswLog_noBlank_Flag}">{{ changePswData.oldPsw_pswLog_noBlank }}</p>
            </div>
            <div style="margin-bottom: 5px;">
                <p style="display: inline-block; width: 100px;">新密码：</p>
                <Input type="password" :maxlength="20" v-model="changePswData.newPsw" placeholder="请输入新密码..." style="width: 300px" @on-blur="newPswValid" @on-focus="newPswValid_focus"></Input>
                <p style="display: inline; color: red;margin-left: 110px;" :style="{display: changePswData.newPsw_pswLog_noBlank_Flag}">{{ changePswData.newPsw_pswLog_noBlank }}</p>
                <p style="display: inline; color: red;margin-left: 110px;" :style="{display: changePswData.pswLog_pattern_Flag}">{{ changePswData.pswLog_pattern }}</p>
            </div>
            <div>
                <p style="display: inline-block; width: 100px;">重复新密码：</p>
                <Input type="password" :maxlength="20" v-model="changePswData.againNewPsw" placeholder="请再输入一次新密码..." style="width: 300px" @on-blur="againNewPswValid" @on-focus="againNewPswValid_focus"></Input>
                <p style="display: inline; color: red;margin-left: 110px;" :style="{display: changePswData.againNewPsw_pswLog_noBlank_Flag}">{{ changePswData.againNewPsw_pswLog_noBlank }}</p>
                <p style="display: inline; color: red;margin-left: 110px;" :style="{display: changePswData.pswLog_equality_Flag}">{{ changePswData.pswLog_equality }}</p>
            </div>
</Modal>

2. data中

            changePswData: {
                    changePswModel: false,

                    oldPsw: '',
                    oldPsw_pswLog_noBlank: '密码不能为空，请重新输入',
                    oldPsw_pswLog_noBlank_Flag: 'none',

                    newPsw: '',
                    newPsw_pswLog_noBlank: '密码不能为空，请重新输入',
                    newPsw_pswLog_noBlank_Flag: 'none',
                    pswLog_pattern: '密码由5-20位数字字母组成，请重新输入',
                    pswLog_pattern_Flag: 'none',

                    againNewPsw: '',
                    againNewPsw_pswLog_noBlank: '密码不能为空，请重新输入',
                    againNewPsw_pswLog_noBlank_Flag: 'none',
                    pswLog_equality: '两次输入密码不相等，请重新输入',
                    pswLog_equality_Flag: 'none'
                }

3.methods中

// 打开Model框
            changePsw: function () {
                this.changePswModel = true;
            },
// 验证输入框
            oldPswValid: function() {
                console.log(this.changePswData.oldPsw)
                if(this.changePswData.oldPsw != ''){
                    this.changePswData.oldPsw_pswLog_noBlank_Flag = 'none'
                }else{
                    this.changePswData.oldPsw_pswLog_noBlank_Flag = 'block'
                }
            },
            oldPswValid_focus: function() {
                this.changePswData.oldPsw_pswLog_noBlank_Flag = 'none'
            },
            newPswValid: function() {
                console.log(this.changePswData.newPsw)
                if(this.changePswData.newPsw != ''){
                    this.changePswData.newPsw_pswLog_noBlank_Flag = 'none';
                    let pattern = /^[a-zA-Z0-9]{6,20}$/;
                    if(!pattern.test(this.changePswData.newPsw)){
                        this.changePswData.pswLog_pattern_Flag = 'block';
                    }else{
                        this.changePswData.pswLog_pattern_Flag = 'none';
                    }
                }else{
                    this.changePswData.newPsw_pswLog_noBlank_Flag = 'block'
                }
            },
            newPswValid_focus: function() {
                this.changePswData.newPsw_pswLog_noBlank_Flag = 'none';
                this.changePswData.pswLog_pattern_Flag = 'none';
            },
            againNewPswValid: function() {
                console.log(this.changePswData.againNewPsw)
                if(this.changePswData.againNewPsw != ''){
                    this.changePswData.againNewPsw_pswLog_noBlank_Flag = 'none';
                    if(this.changePswData.againNewPsw != this.changePswData.newPsw){
                        this.changePswData.pswLog_equality_Flag = 'block'
                    }else{
                        this.changePswData.pswLog_equality_Flag = 'none'
                    }
                }else{
                    this.changePswData.againNewPsw_pswLog_noBlank_Flag = 'block'
                }
            },
            againNewPswValid_focus: function() {
                this.changePswData.againNewPsw_pswLog_noBlank_Flag = 'none';
                this.changePswData.pswLog_equality_Flag = 'none'
            },

// 修改密码
             changePswOk: function () {
                let self = this;
                console.log(self.validPsw())
                if(self.validPsw() == 1){
                    axios.post('#', {
                        password: self.changePswData.oldPsw,
                        newPassword: self.changePswData.newPsw
                    }).then(function (response) {
                        let data = response.data.data;
                        let status = response.data.status;
                        if(status == '0'){
                            self.$Message.success(data);
                        }
                    }).catch(function (error) {
                        self.$Message.error('修改密码失败，请重新修改!');
                    })
                }else{
                    self.$Message.error('修改密码失败，请重新修改!');
                }
            },
            changePswCancel: function () {

            }