# [已解决] Dropwizard – 无法解析配置（无法将类型 ID “http”解析为子类型） > 原文： [https://howtodoinjava.com/dropwizard/solved-dropwizard-failed-parse-configuration-not-resolve-type-id-http-subtype/](https://howtodoinjava.com/dropwizard/solved-dropwizard-failed-parse-configuration-not-resolve-type-id-http-subtype/) 如果您使用 dropwizard 构建 REST API，并且在启动 Jetty 服务器时遇到此错误，则给定的解决方案可能会对您有所帮助。 ## 问题 启动服务器时，您会收到此错误。 ```java >java -jar target\DropWizardExample-0.0.1-SNAPSHOT.jar server default configuration has an error: * Failed to parse configuration at: server.applicationConnectors.[0]; Could not resolve type id 'http' into a subtype of [simple type, class io.dropwizard.jetty.ConnectorFactory]: known type ids = [ConnectorFactory] at [Source: N/A; line: -1, column: -1] (through reference chain: io.dropwizard.Configuration["server"]->io.dropwizard.server.DefaultServerFactory["applicationConnectors"]->java.util.ArrayList[0]) ``` ## 解决方案 上面的异常是因为您在 Maven shade 插件中没有使用 **`ServicesResourceTransformer`** 。 它将`META-INF/services`中的类重新放置，并将`META-INF/services`资源中的条目追加到单个资源中。 请更正 shade 插件，您会感觉很好。 我的`pom.xml`非常适合我。 ```java <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd; <modelVersion>4.0.0</modelVersion> <groupId>com.howtodoinjava.demo</groupId> <artifactId>DropWizardExample</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>DropWizardExample</name> <url>http://maven.apache.org</url> <properties> <dropwizard.version>1.0.0</dropwizard.version> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>io.dropwizard</groupId> <artifactId>dropwizard-core</artifactId> <version>${dropwizard.version}</version> </dependency> <dependency> <groupId>io.dropwizard</groupId> <artifactId>dropwizard-client</artifactId> <version>${dropwizard.version}</version> </dependency> </dependencies> <build> <finalName>DropWizardExample-${version}</finalName> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.1</version> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-shade-plugin</artifactId> <version>2.1</version> <executions> <execution> <phase>package</phase> <goals> <goal>shade</goal> </goals> <configuration> <transformers> <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer"> <mainClass>com.howtodoinjava.rest.App</mainClass> </transformer> </transformers> </configuration> </execution> </executions> </plugin> </plugins> </build> </project> ``` 让我知道它是否可以解决您的问题。 学习愉快！