Spring Boot groovy 编译错误:Unexpected token @@line 45 [英] Spring Boot groovy compilation error: Unexpected token @ @ line 45

问题描述

我正在尝试将 Spring Boot 项目中的 Java 控制器转换为 Groovy，并在尝试编译和运行时遇到最奇怪的错误

I'm trying to convert a Java controller in my Spring Boot project to Groovy, and getting the strangest error when trying to compile and run

unexpected token: @ @ line 45, column 5
@RequestMapping(value = {"/v1/foo", "/foo"}, method = GET)
^

这让我很困惑.注释是 Java 或 Groovy 中的注释，对吗?我错过了什么?这是我的代码的抽象

This is baffling to me. Annotations are annotations in Java or Groovy, right? what am I missing? Here's an abstraction of my code

// src/main/groovy/my/package/FooController.groovy, formerly .java

/// ... proper imports

@RestController
@EnableAutoConfiguration
public class FooController {

    // ... @autowire services

    @RequestMapping(value = {"/v1/foo", "/foo"}, method = GET)
    public ResponseEntity get(@RequestHeader HttpHeaders headers) {
      // do work return ResponseEntity
    }

    @RequestMapping(value = {"/v1/foo", "/foo"}, method = PUT)
    public ResponseEntity put(@RequestHeader HttpHeaders headers, @ResponseBody @Valid final MyFoo myFoo) {
      // do work return ResponseEntity
    }
}

推荐答案

所以我只是愚蠢，错过了 Java 和 Groovy 之间的一个关键区别

So I'm just dumb and missed a key differentiator between Java and Groovy

问题是我传递给 @RequestMapping

在 Java 中，{"/v1/foo", "foo"} 是一个数组字面量

In Java, {"/v1/foo", "foo"} is an array literal

在 Groovy 中，{"/v1/foo", "foo"} 是一个闭包

In Groovy, {"/v1/foo", "foo"} is a closure

该错误消息显然没有帮助，但要解决此问题，我只需要更改 Groovy 中的注释以按照我的意图传入数组文字，而不是闭包

The error message obviously wasn't helpful, but to fix this I simply needed to change the annotation in Groovy to pass in an array literal as I intended, not a closure

@RequestMapping(value = ["/v1/foo", "/foo"], method = GET)

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