java.lang.UnsupportedClassVersionError: org/springframework/web/client/RestTemplate : Unsupported major.minor version 52.0

Question

I have created a new project in IntelliJ with help of Spring initializer and selected JDK version 1.7 and spring boot 2.0.1. I have created a main class and try to run the application but getting the error "Exception in thread "main" java.lang.UnsupportedClassVersionError: org/springframework/web/client/RestTemplate : Unsupported major.minor version 52.0". I have tried a lot of solutions but unluckily unable to fix the problem. Can anyone please help me to sort out the issue.

Thanks

score 2 · Answer 1 · answered May 06 '18 at 18:07

2

It's because Java version mismatch.

Spring boot 2.0.1 requires JDK 8 and above.

So you should install and specify JDK 8 for your application

More information here.

https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-2.0-Release-Notes#java-8-baseline-and-java-9-support

answered May 06 '18 at 18:07

Mạnh Quyết Nguyễn

17,677
1
23
51

thanks for the reply. I want to run it on JDK 7 because destination machine is supported with JDK 7. How can i run with JDK 7? – Touqeer May 06 '18 at 18:09
Then you should lower your spring boot version to 1.8.x or so – Mạnh Quyết Nguyễn May 06 '18 at 18:10
How can I downgrade the version of spring boot? Is there any helpful material.. i am new in development – Touqeer May 06 '18 at 18:11
Open your pom.xml file. You will find a properties call `spring-boot-starter-parent`. Change its version to 1.5.9 or so – Mạnh Quyết Nguyễn May 06 '18 at 18:23
Spring Boot version 1.5.X supports JDK 7...Spring 2.X requires JDK 8...simply... – khmarbaise May 06 '18 at 18:41

score 0 · Answer 2 · answered May 06 '18 at 18:08

0

The version of the spring boot 2.0.1 is compiled for JDK1.8

answered May 06 '18 at 18:08

Azzabi Haythem

2,318
7
26
32

Can you please tell what spring boot is compatible with JDK 1.7? – Touqeer May 06 '18 at 18:10
try 1.4.0 or 1.4.0.RELEASE – Azzabi Haythem May 06 '18 at 19:51

java.lang.UnsupportedClassVersionError: org/springframework/web/client/RestTemplate : Unsupported major.minor version 52.0

2 Answers2