HTML报错 Malformed markup: Attribute “xxx“ appears more than once in element

问题

运行项目，报错，控制台显示
Malformed markup: Attribute “method” appears more than once in element
详细如下：

......org.thymeleaf.exceptions.TemplateInputException: An error happened during template parsing (template: "class path resource [templates/html/aa.html]" - line 12, col 81)] with root cause
org.attoparser.ParseException: (Line = 12, Column = 81) Malformed markup: Attribute "method" appears more than once in element
......

解决

实际上是HTML有误，在aa.html中“method”重复出现了，删除多余的method即可

（前端开发送bug，泪目(╯‵□′)╯︵┻━┻）
（令人窒息的是，同用的前端代码，如果不用Thymeleaf，就不会明显出错，项目还可以正常运用）