java.lang.IllegalArgumentException : URI is not absolute Spring Boot RestTemplate

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Problem:

Controller Code:

import javax.servlet.http.HttpServletRequest; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.client.RestTemplate; @RestController public class StudentController { @GetMapping(value = "/getstudent") private Student getStudent(HttpServletRequest request) { String uri = "/student"; RestTemplate restTemplate = new RestTemplate(); Student student= restTemplate.getForObject(uri, Student.class); return student; } }

Every time I run my Java application I get below exception-


2022-02-23 17:15:08.417 ERROR 20534 --- [nio-8080-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.IllegalArgumentException: URI is not absolute] with root cause java.lang.IllegalArgumentException: URI is not absolute at java.net.URI.toURL(URI.java:1088) ~[na:1.8.0_101] at org.springframework.http.client.SimpleClientHttpRequestFactory.createRequest(SimpleClientHttpRequestFactory.java:145) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE] at org.springframework.http.client.support.HttpAccessor.createRequest(HttpAccessor.java:124) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE] at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:735) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE]

Solution

In above code, URL getting passed in restTemplate is not an absolute URL ("/student") due to which this error is happening. Instead you should be passing full URL like "http://localhost:8080/student".


import javax.servlet.http.HttpServletRequest; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.client.RestTemplate; @RestController public class StudentController { @GetMapping(value = "/getstudent") private Student getStudent(HttpServletRequest request) { String uri = "http://localhost:8080/student"; RestTemplate restTemplate = new RestTemplate(); Student student= restTemplate.getForObject(uri, Student.class); return student; } }
                 





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