我有一个springboot（v2.3.5.release）restapi，似乎无法解决路径变量的编码问题。我尝试了网上找到的每一个解决方案，但都无济于事。以下是主要课程：

@SpringBootApplication
public class RestApplication {

    public static void main(String[] args) {
        SpringApplication.run(RestApplication.class, args);
    }
}

restcontroller（将请求发送到该url时从不执行该方法）：

@RestController
@RequestMapping("/mvn/packages")
public class ModuleApi {

    @Autowired
    ModuleApiService service;

    @GetMapping(value = "/{pkg}/{pkg_ver}/modules/{namespace}/metadata", produces = MediaType.APPLICATION_JSON_VALUE)
    ResponseEntity<String> getModuleMetadata(@PathVariable("pkg") String package_name,
                                             @PathVariable("pkg_ver") String package_version,
                                             @PathVariable("namespace") String module_namespace) {
        return service.getModuleMetadata(package_name, package_version, module_namespace);
    }
}

配置类：

@Configuration
public class CorsConfiguration
{
    @Bean
    public FilterRegistrationBean filterRegistrationBean() {
        FilterRegistrationBean registrationBean = new FilterRegistrationBean();
        CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter();
        characterEncodingFilter.setForceEncoding(true);
        characterEncodingFilter.setEncoding("UTF-8");
        registrationBean.setFilter(characterEncodingFilter);
        return registrationBean;
    }
}

这个 application.properties :

logging.level.org.springframework.web=DEBUG
server.port=8080
server.tomcat.uri-encoding=UTF-8
server.servlet.encoding.charset=UTF-8
server.servlet.encoding.enabled=true
server.servlet.encoding.force=true

我甚至把编码添加到 spring-boot-maven-plugin 在 pom.xml :

<plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.3.6.RELEASE</version>
                <configuration>
                    <mainClass>RestApplication</mainClass>
                    <jvmArguments>-Dfile.encoding=UTF8</jvmArguments>
                </configuration>
            </plugin>

但结果还是一样。向发送请求时 http://localhost:8080/mvn/packages/junit:junit/4.12/%2Fjunit.framework%2FAssert 即 mvn/packages/{pkg}/{pkg_ver}/modules/{namespace}/metadata 以及 namespace 被编码，它返回 HTTP 400 - BAD REQUEST .
然而，当我尝试 http://localhost:8080/mvn/packages/junit:junit/4.12/foo （不需要编码/解码），它可以工作。
我也试过用 ALLOW_ENCODED_SLASH 财产。主要类别：

@SpringBootApplication
public class RestApplication {

    public static void main(String[] args) {
        System.setProperty("org.apache.tomcat.util.buf.UDecoder.ALLOW_ENCODED_SLASH", "true");
        SpringApplication.run(RestApplication.class, args);
    }
}

但在这种情况下，它无法将请求解析为该Map并返回 404 - NOT FOUND :

2020-12-10 17:03:27.044 DEBUG 105120 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : GET "/mvn/packages/junit:junit/4.12/%2Fjunit.framework%2FAssert", parameters={}
2020-12-10 17:03:27.053 DEBUG 105120 --- [nio-8080-exec-1] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped to ResourceHttpRequestHandler ["classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/", "/"]
2020-12-10 17:03:27.056 DEBUG 105120 --- [nio-8080-exec-1] o.s.w.s.r.ResourceHttpRequestHandler     : Resource not found
2020-12-10 17:03:27.056 DEBUG 105120 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed 404 NOT_FOUND
2020-12-10 17:03:27.060 DEBUG 105120 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : "ERROR" dispatch for GET "/error", parameters={}
2020-12-10 17:03:27.062 DEBUG 105120 --- [nio-8080-exec-1] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped to org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController#errorHtml(HttpServletRequest, HttpServletResponse)
2020-12-10 17:03:27.083 DEBUG 105120 --- [nio-8080-exec-1] o.s.w.s.v.ContentNegotiatingViewResolver : Selected 'text/html' given [text/html, text/html;q=0.8]
2020-12-10 17:03:27.087 DEBUG 105120 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Exiting from "ERROR" dispatch, status 404

有人能帮我吗？