java - Creating a file download link using Spring Boot and Thymeleaf -

this might sound trivial question, after hours of searching yet find answer this. problem, far understand, trying return filesystemresource controller , thymeleaf expects me supply string resource using render next page. since returning filesystemresource, following error:

org.thymeleaf.exceptions.templateinputexception: error resolving template "products/download", template might not exist or might not accessible of configured template resolvers 

the controller mapping have used is:

@requestmapping(value="/products/download", method=requestmethod.get) public filesystemresource downloadfile(@param(value="id") long id) {     product product = productrepo.findone(id);     return new filesystemresource(new file(product.getfileurl())); } 

my html link looks this:

<a th:href="${'products/download?id=' + product.id}"><span th:text="${product.name}"></span></a> 

i don't want redirected anywhere, need file downloaded once link clicked. right implementation? i'm not sure.

you need change th:href like:

<a th:href="@{|/products/download?id=${product.id}|}"><span th:text="${product.name}"></span></a> 

then need change controller , include @responsebody annotation:

@requestmapping(value="/products/download", method=requestmethod.get) @responsebody public filesystemresource downloadfile(@param(value="id") long id) {     product product = productrepo.findone(id);     return new filesystemresource(new file(product.getfileurl())); }