How to write bootstrapValidator custom validation method

The example in this article shares how to write the bootstrapValidator custom verification method for your reference. The specific content is as follows

//表单验证
issueInvoiceForm.validation = function(){
 $('#issueInvoiceForm').on('init.field.bv', function(e, data) {
    var $icon   = data.element.data('bv.icon'),
      options  = data.bv.getOptions(),           // Entire options
      validators = data.bv.getOptions(data.field).validators; // The field validators
    if (validators.notEmpty && options.feedbackIcons && options.feedbackIcons.required) {
     $icon.addClass(options.feedbackIcons.required).show();
    }
  }).bootstrapValidator({
    container:'popover',
 feedbackIcons: {
  required: 'glyphicon glyphicon-asterisk requiredStar',
      valid: 'glyphicon glyphicon-ok',
      invalid: 'glyphicon glyphicon-remove',
      validating: 'glyphicon glyphicon-refresh'
    },
    fields: {
     invoiceDate:{validators: {notEmpty: {message: '开票日期不能为空'}}},//开票日期
     code:{validators: {notEmpty: {message: '发票编码不能为空'}}},
     amount:{
     validators:{
      notEmpty: {message: '发票金额不能为空'},
      numeric: {message: '发票金额只能输入数字'},
      callback: {
             message: '开票金额小于选中金额',
             callback: function(value, validator) {
              return false;
             }
           }
 
     }
     },
     taxRate:{
     validators:{
      notEmpty: {message: '税率不能为空'},
      numeric: {message: '税率只能输入数字'}
     }
     },
     taxAmount:{
     validators:{
      notEmpty: {message: '税额不能为空'},
      numeric: {message: '税额只能输入数字'}
     }
     },
    },group:'.validateDiv'
 }).on('success.form.bv', issueInvoiceForm.issueInvoiceFormBtn).on('error.form.bv',function(){
  $("#issueInvoiceFormBtn").removeAttr("disabled");//将保存按钮去除disabled
   $(".has-error:visible:first").find(":input").focus();
  });
};