Partially updated to 6.0 chapter 6 of  Using Thymelaef
Partially updated to 6.0 chapter 6 of  Using Thymelaef

thymeleaf/thymeleaf-docs,thymeleaf-docs-ja/thymeleaf-docs,thymeleaf/thymeleaf-docs,thymeleaf-docs-ja/thymeleaf-docs