Spring boot and Open UI5 error : JSON.parse: unexpected end of data – when setting resourceroots

Problem : After setting the tag data-sap-ui-resourceroots the UI5 loading stops with the error “JSON.parse: unexpected end of data …”

Reason : Spring boot thymeleaf view formatter changes single quotes to double quotes, thus braking the valid JSON format of the tag.

    <script src="/resources/sap-ui-core.js" id="sap-ui-bootstrap" data-sap-ui-theme="sap_belize" data-sap-ui-libs="sap.m" data-sap-ui-compatVersion="edge" data-sap-ui-preload="async" data-sap-ui-resourceroots="{"demo":"uidemo"}">
<!-- note the stupid double quotes in the json at the end of above line -->
<!-- this was originally single quotes - '{"demo":"uidemo"}' -->

Fix :  

  • Make the landing page a static HTML instead of a view template (move from templates folder to static, in Spring boot).
  • OR
  • Move to Velocity or JSP formatters

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