java / beginner
Snippet
Extracting Primitive Route Values with PathVariable
Spring MVC automatically parses URL path placeholders and converts string tokens into target Java datatypes like Long or boolean. Using @PathVariable binds the dynamic segment directly to strongly-typed method parameters.
snippet.java
java
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import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RestController;@RestControllerpublic class ProductController {@GetMapping("/products/{id}/active/{flag}")public String getProductInfo(@PathVariable("id") Long productId,@PathVariable("flag") boolean isActive) {return "Product ID: " + productId + ", Active: " + isActive;}}
spring
Breakdown
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@GetMapping("/products/{id}/active/{flag}")
Defines route template variables inside curly braces within the endpoint mapping.
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@PathVariable("id") Long productId
Binds the dynamic '{id}' path fragment and automatically converts it into a 64-bit Long.