NoSuchFieldError： DEFAULT_INCOMPATIBLE_IMPROVEMENTS

Question

在Spring靴2.3.3上试用网飞·海斯特里克斯时，出现以下错误...

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'freeMarkerConfigurer' defined in org.springframework.cloud.netflix.hystrix.dashboard.HystrixDashboardConfiguration: Invocation of init method failed; nested exception is java.lang.NoSuchFieldError: DEFAULT_INCOMPATIBLE_IMPROVEMENTS

主要SimpleClientApplication.java有以下注释

@SpringBootApplication
@EnableCircuitBreaker
@EnableHystrixDashboard

ProductListController。Java语言

@RestController
@EnableAutoConfiguration(exclude = { FreeMarkerAutoConfiguration.class })
public class ProductListController {

    @GetMapping
    @HystrixCommand(fallbackMethod = "defaultProducts")
    public List<String> cloudProductList() {

        RestTemplate restTemplate = new RestTemplate();
        URI uri = URI.create("http://localhost:8090/products");

        return restTemplate.getForObject(uri, List.class);
    }

    public List<String> defaultProducts() {
        return Arrays.asList("Spring Cloud");
    }
}

啪啪.xml...

4.0.0 org.springframework.boot spring-boot-starter-parent 2.3.3.RELEASE com.demo simple-client-application 1.0 simple-client-application Spring Boot 的演示项目

    <properties>
        <java.version>14</java.version>
        <spring-cloud.version>Hoxton.SR8</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
            <version>2.1.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-autoconfigure</artifactId>
        </dependency>
        <dependency>
            <groupId>freemarker</groupId>
            <artifactId>freemarker</artifactId>
            <version>2.3.9</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-netflix-hystrix</artifactId>
            <version>2.1.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.freemarker</groupId>
            <artifactId>freemarker</artifactId>
            <version>2.3.9</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.6</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-autoconfigure</artifactId>
            <version>2.3.3.RELEASE</version>
        </dependency>
    </dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

Answer 1

我尝试了许多解决方案：

< li >调整了maven pom的< code>freemarker排除项，并明确添加了< code > spring-context-support 。 < li >添加了< code > spring . freemarker . check-template-location:false < li >添加了< code > spring . freemarker . enabled:false

这些组合都不适合我，在我的Spring-Boot应用程序的每次启动时，我都会遇到您提到的相同错误。

最后我发现只要重新定义后缀：

spring
  freemarker:
    suffix: .ftl

并设置：

@EnableAutoConfiguration(exclude = {FreeMarkerAutoConfiguration.class})

在我的AppConfig类（包含@Configuration注释的类）中，我的应用程序在更改后启动。

我必须提到，我使用Freemarker时没有存储在我的应用html" target="_blank">程序中的模板，而只是将其用作运行时依赖项（我的Freemarker模板只是在我的类方法中传递的文本（Java字符串），然后我并不真正关心文件扩展名。我不想使用 Freemarker 自动配置，我只是明确添加了依赖项：

<dependency>
    <groupId>org.freemarker</groupId>
    <artifactId>freemarker</artifactId>
    <version>${freemarker.version}</version>
</dependency>