我已经从maven原型创建了一个示例maven项目DropwizardApp - Group Id：io.dropwizard.archetypes ArtifactId：java-simple。下面是默认生成的两个类。
DropwizardAppApplication.java
package com.nagra.DropwizardApp;
import io.dropwizard.Application;
import io.dropwizard.setup.Bootstrap;
import io.dropwizard.setup.Environment;
public class DropwizardAppApplication extends Application<DropwizardAppConfiguration> {
public static void main(final String[] args) throws Exception {
new DropwizardAppApplication().run(args);
}
@Override
public String getName() {
return "DropwizardApp";
}
@Override
public void initialize(final Bootstrap<DropwizardAppConfiguration> bootstrap) {
// TODO: application initialization
}
@Override
public void run(final DropwizardAppConfiguration configuration,
final Environment environment) {
// TODO: implement application
}
}
和DropwizardAppConfiguration.java
package com.nagra.DropwizardApp;
import io.dropwizard.Configuration;
import com.fasterxml.jackson.annotation.JsonProperty;
import org.hibernate.validator.constraints.*;
import javax.validation.constraints.*;
public class DropwizardAppConfiguration extends Configuration {
// TODO: implement service configuration
}
并尝试运行DropwizardAppApplication但低于错误。
Exception in thread "main" java.lang.NoClassDefFoundError: com/google/common/collect/ImmutableMap$Builder
at io.dropwizard.util.Duration.<clinit>(Duration.java:19)
at io.dropwizard.logging.LoggingUtil.<clinit>(LoggingUtil.java:14)
at io.dropwizard.logging.BootstrapLogging.bootstrap(BootstrapLogging.java:38)
at io.dropwizard.logging.BootstrapLogging.bootstrap(BootstrapLogging.java:34)
at io.dropwizard.Application.<init>(Application.java:24)
at com.nagra.DropwizardApp.DropwizardAppApplication.<init>(DropwizardAppApplication.java:7)
at com.nagra.DropwizardApp.DropwizardAppApplication.main(DropwizardAppApplication.java:10)
Caused by: java.lang.ClassNotFoundException: com.google.common.collect.ImmutableMap$Builder
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 7 more
pom.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<prerequisites>
<maven>3.0.0</maven>
</prerequisites>
<groupId>com.nagra</groupId>
<artifactId>DropwizardApp</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>DropwizardApp</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<dropwizard.version>1.0.5</dropwizard.version>
<mainClass>com.nagra.DropwizardApp.DropwizardAppApplication</mainClass>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>io.dropwizard</groupId>
<artifactId>dropwizard-bom</artifactId>
<version>${dropwizard.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>io.dropwizard</groupId>
<artifactId>dropwizard-core</artifactId>
<version>${dropwizard.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-shade-plugin</artifactId>
<version>2.4.1</version>
<configuration>
<createDependencyReducedPom>true</createDependencyReducedPom>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer" />
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>${mainClass}</mainClass>
</transformer>
</transformers>
<!-- exclude signed Manifests -->
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>2.6</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>${mainClass}</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-source-plugin</artifactId>
<version>2.4</version>
<executions>
<execution>
<id>attach-sources</id>
<goals>
<goal>jar</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-javadoc-plugin</artifactId>
<version>2.10.3</version>
<executions>
<execution>
<id>attach-javadocs</id>
<goals>
<goal>jar</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<reporting>
<plugins>
<plugin>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>2.8.1</version>
<configuration>
<dependencyLocationsEnabled>false</dependencyLocationsEnabled>
<dependencyDetailsEnabled>false</dependencyDetailsEnabled>
</configuration>
</plugin>
<plugin>
<artifactId>maven-javadoc-plugin</artifactId>
<version>2.10.3</version>
</plugin>
</plugins>
</reporting>
</project>
答案 0 :(得分：0)
Prasad，尝试以下两个引导程序并运行应用程序（注意将此作为答案发布，因为这将不适合评论）
使用以下方式创建项目：
MergeHub.source[(Promise[String], String)]()然后运行应用程序，生成的pom是
mvn archetype:generate -DgroupId=com.nagra -DartifactId=DropwizardApp -Dname=DropwizardAppApplication -DarchetypeGroupId=io.dropwizard.archetypes -DarchetypeArtifactId=java-simple -DarchetypeVersion=1.1.0 -Dpackage=com.nagra.DropwizardApp
并启动应用程序。你可以查一次吗
<?xml version="1.0" encoding="UTF-8"?>
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<prerequisites>
<maven>3.0.0</maven>
</prerequisites>
<groupId>com.nagra</groupId>
<artifactId>DropwizardApp</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>DropwizardAppApplication</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<dropwizard.version>1.0.5</dropwizard.version>
<mainClass>com.nagra.DropwizardApp.DropwizardAppApplicationApplication</mainClass>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>io.dropwizard</groupId>
<artifactId>dropwizard-bom</artifactId>
<version>${dropwizard.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>io.dropwizard</groupId>
<artifactId>dropwizard-core</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-shade-plugin</artifactId>
<version>2.4.1</version>
<configuration>
<createDependencyReducedPom>true</createDependencyReducedPom>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer
"/>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer
">
<mainClass>${mainClass}</mainClass>
</transformer>
</transformers>
<!-- exclude signed Manifests -->
<filters>
<filter>
<artifact>*:*</artifact>
<excludes>
<exclude>META-INF/*.SF</exclude>
<exclude>META-INF/*.DSA</exclude>
<exclude>META-INF/*.RSA</exclude>
</excludes>
</filter>
</filters>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>2.6</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<mainClass>${mainClass}</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-source-plugin</artifactId>
<version>2.4</version>
<executions>
<execution>
<id>attach-sources</id>
<goals>
<goal>jar</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-javadoc-plugin</artifactId>
<version>2.10.3</version>
<executions>
<execution>
<id>attach-javadocs</id>
<goals>
<goal>jar</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<reporting>
<plugins>
<plugin>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>2.8.1</version>
<configuration>
<dependencyLocationsEnabled>false</dependencyLocationsEnabled>
<dependencyDetailsEnabled>false</dependencyDetailsEnabled>
</configuration>
</plugin>
<plugin>
<artifactId>maven-javadoc-plugin</artifactId>
<version>2.10.3</version>
</plugin>
</plugins>
</reporting>
</project>