How to Fix: How to use LocalDateTime RequestParam in Spring? I get "Failed to convert String to LocalDateTime"

<bean class="org.springframework.boot.autoconfigure.web.servlet.WebMvcConfigurer"> <bean class="org.springframework.http.server.server.HttpServerHttpRequestHandler"/> <setRequestHeaderMapper> org.springframework.http.server.server.HttpServerHttpRequestHeaderMapper </setRequestHeaderMapper> </bean>

This configuration tells Jackson to use a custom date format for the LocalDateTime type.

Method 2: Use @DateTimeFormat with Iso

1. Step 1: Update the @RequestParam annotation to use the @DateTimeFormat annotation with the iso format:

@GetMapping("/test") public Page<User> get( @RequestParam(value = "start", required = false) @DateTimeFormat(iso = DateTimeFormat.ISO.DATE_TIME) LocalDateTime start) { //... }

🎯 Final Words

By following these methods, you should be able to fix the 'Failed to convert String to LocalDateTime' error in your Spring Boot application.