Swagger reader throws java.lang.NoSuchMethodError

Question

我试图在我的项目(Sparkjava)中创建API文档。[1]我写了这个解析器:

import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import io.swagger.jaxrs.Reader;
import io.swagger.models.*;
import spark.Route;
import java.util.Arrays;
import java.util.List;
public class SwaggerParser {
public static String getSwaggerJson(List<Route> routes) throws JsonProcessingException {
Swagger swagger = getSwagger(routes);
return swaggerToJson(swagger);
}
private static Swagger getSwagger(List<Route> routes) {
Swagger swagger = new Swagger();
swagger.info(new Info().description("User API")
.version("V1.0")
.title("Some random api for testing")
.contact(new Contact().name("Serol").url("https://serol.ro")));
swagger.schemes(Arrays.asList(Scheme.HTTP, Scheme.HTTPS));
swagger.consumes("application/json");
swagger.produces("application/json");
swagger.tag(new Tag().name("swagger"));
Reader reader = new Reader(swagger);
for (Route route : routes) {
try {
reader.read(route.getClass());
}catch (Throwable throwable){
System.out.println(throwable);
}
}
return reader.getSwagger();
}
public static String swaggerToJson(Swagger swagger) throws JsonProcessingException {
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.setSerializationInclusion(Include.NON_EMPTY);
return objectMapper.writeValueAsString(swagger);
}
}

它在我的测试应用程序中工作，但在实际项目中不起作用。我为此编写了init test:

import com.fasterxml.jackson.core.JsonProcessingException;
import com.healthgorilla.portal.server.labnetwork.api.GetOrdersAPI;
import com.healthgorilla.portal.server.labnetwork.route.GetOrdersRoute;
import org.junit.Test;
import java.util.Collections;
import static org.junit.Assert.*;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
public class SwaggerParserTest {
@Test
public void name() throws JsonProcessingException {
GetOrdersAPI api = mock(GetOrdersAPI.class);
when(api.exec()).thenReturn("");
String swaggerJson = SwaggerParser.getSwaggerJson(Collections.singletonList(new GetOrdersRoute(api)));

assertNotNull(swaggerJson);
}
}

抛出一个异常:

java.lang.NoSuchMethodError: com.fasterxml.jackson.databind.introspect.AnnotatedMember.getType(Lcom/fasterxml/jackson/databind/type/TypeBindings;)Lcom/fasterxml/jackson/databind/JavaType;

但是在测试项目中它是有效的[1]: https://serol.ro/posts/2016/swagger_sparkjava/

编辑:

我发现了冲突。在项目中有更新的jackson版本。我更改了我的swagger依赖

<!-- swagger -->
<dependency>
<groupId>io.swagger</groupId>
<artifactId>swagger-core</artifactId>
<version>1.6.2</version>
<exclusions>
<exclusion>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
</exclusion>
<exclusion>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</exclusion>
<exclusion>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>io.swagger</groupId>
<artifactId>swagger-jaxrs</artifactId>
<version>1.6.2</version>
<exclusions>
<exclusion>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
</exclusion>
<exclusion>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
</exclusion>
<exclusion>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
</exclusion>
</exclusions>
</dependency>

但它没有帮助。这是我的Jackson依赖项:

<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.11.2</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.11.2</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.11.2</version>
</dependency>

Answer 1

潜在的问题是您的依赖项(包括可传递的)与您的swagger版本不兼容。我不知道你使用的是哪个构建系统，但在maven中可以使用

mvn dependency:tree

https://maven.apache.org/plugins/maven-dependency-plugin/tree-mojo.html

在gradle中，你可以尝试gradle -q dependencies --configuration scm，更多信息见https://docs.gradle.org/current/userguide/viewing_debugging_dependencies.html

尝试检查你的依赖项和它们的版本。

Answer 2

在您的pom.xml中检查springfox-boot-starter依赖性。在从swagger2升级到swagger3的情况下，我忘记了删除与swagger2的依赖关系，如springfox-boot-starter。之后就可以了