Spring 引导中多个项目中的错误处理程序

Question

I'm currently working with different services divided in different projects in Spring Boot.

I have made an error handler which will be a JAR for all the projects, so when I have

com.my.package in all the projects the error handler works fine.

com.my.package.Controller
com.my.package.Entity
...

My Exception Response:

    "code": 400,
    "message": "'id' must be java.lang.Integer",
    "status": "BAD_REQUEST"
}

But the problem is when I have

com.my.package.p1 -> for project p1

com.my.package.p2 -> for project p2

com.my.package.p1.Controller
com.my.package.p1.Entity
...

com.my.package.p2.Controller
com.my.package.p2.Entity
...

the error handler seems to fail in its job and the default handler resolves the error, rather than mine.

{
    "timestamp": "2019-09-30T23:58:57.379+0000",
    "status": 400,
    "error": "Bad Request",
    "message": "Failed to convert value of type 'java.lang.String' to required type 'java.lang.Integer'; nested exception is java.lang.NumberFormatException: For input string: \"j\"",
    "path": "/api/department/j"
}

These are my classes from my JAR

//@RestControllerAdvice(basePackages = "com.my.package")
@ControllerAdvice
public class GlobalControllerExceptionHandler {

    private static final Logger LOGGER = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());

      //405
    @ExceptionHandler(HttpRequestMethodNotSupportedException.class)
    @ResponseStatus(HttpStatus.METHOD_NOT_ALLOWED)
    protected GlobalException processMethodNotSupportedException(final HttpRequestMethodNotSupportedException ex) {
        LOGGER.error("Method not allowed");  
        return new GlobalException(405, "Method not allowed",HttpStatus.METHOD_NOT_ALLOWED);
    }

...

As you see, I tried using @RestControllerAdvice and @ControllerAdvice, and trying to use annotation basePackages but there was not succesful result.

I also made another class:

@Configuration
@ComponentScan("com.my.package")
@EntityScan("com.my.package")
public class SharedBeanReference {

}

But same result.

Can somebody help me figuring out what is happening?

Answer 1

You could try specifying the basepackage of the controller advice using the annotation like:

@ControllerAdvice(basePackages = "com.my.package")
public class GlobalControllerExceptionHandler {

    private static final Logger LOGGER = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());

      //405
    @ExceptionHandler(HttpRequestMethodNotSupportedException.class)
    @ResponseStatus(HttpStatus.METHOD_NOT_ALLOWED)
    protected GlobalException processMethodNotSupportedException(final HttpRequestMethodNotSupportedException ex) {
        LOGGER.error("Method not allowed");  
        return new GlobalException(405, "Method not allowed",HttpStatus.METHOD_NOT_ALLOWED);
    }

...

For @ExceptionHandler methods, a root exception match will be preferred to just matching a cause of the current exception, among the handler methods of a particular advice bean. However, a cause match on a higher-priority advice will still be preferred over any match (whether root or cause level) on a lower-priority advice bean. As a consequence, please declare your primary root exception mappings on a prioritized advice bean with a corresponding order.

Or you could try the following:

• Try providing the controller advice class a higher priority or order using the @Priority or @Order annotation so that it gets matched.
• You need make sure that the @ControllerAdvice Class is under your component-scan base package.

Reference doc Official Doc