Web Reference: Since Java Bean requires a default constructor you get your error. Spring cannot instantiate your TestController because its only constructor requires a parameter. You can add a no-arg constructor or you add @Autowired annotation to the constructor: TestController.testClient = testClient; Jan 16, 2026 · One common issue is the "No default constructor found" error, often accompanied by a java.lang.NoSuchMethodException. This error occurs when Spring fails to instantiate a controller (or any Spring-managed bean) because it cannot find a suitable constructor. Learn how to fix the 'No default constructor found' exception in Spring MVC applications with expert troubleshooting tips and solutions.
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