java - 为什么 @Getmapping 在某些情况下不起作用？

Question

在我的 Controller 中，@GetMapping 的以下使用有效:

@GetMapping(value = "/new")
public String newEssay(){
    return "articles/essay_new";
}

但它不是这样工作的:

@GetMapping(value = "/essays/{essayId: [0-9]+}")
//@RequestMapping(value = "/essays/{essayId:[0-9]+}", method = RequestMethod.GET)
public String getEssay(Model model,
                       @PathVariable("essayId") long essayId) throws NoFindException, ForBiddenException, ParseException {
    JsEssay jsEssay = jsBiz.get(JsEssay.class, essayId);

    model.addAttribute("jsEssay", jsEssay);
    return "articles/essay";
}

我在 Spring 4.3.3 和 5.0.0.M5 上尝试过。

配置:

@Configuration
@ComponentScan( basePackages = {"me.freezehome.blog"},
            excludeFilters = {
                @ComponentScan.Filter(type = FilterType.ANNOTATION,     value = EnableWebMvc.class)
            }
)
public class RootConfig {
}



@Configuration
@EnableWebMvc
@Import({WebSecurityConfig.class})
public class WebConfig  extends WebMvcConfigurerAdapter{
    @Bean
    public RequestMappingHandlerMapping requestMappingHandlerMapping(){
        return new RequestMappingHandlerMapping();
    }
    @Bean
    public RequestMappingHandlerAdapter requestMappingHandlerAdapter(){
        return new RequestMappingHandlerAdapter();
    }
}

谷歌结果:

• Add support for @GetMapping, @PostMapping etc. introduced in Spring 4.3 in ControllerLinkBuilder #471
• GetMapping and PostMapping annotations Ask

github来源:lbfreeze-blog-develop

Answer 1

请删除essayId:后面的空格

此外，您不需要为 @GetMapping 编写 value =。