我已经使用 Spring Roo 1.1.5 在 Google App Engine 中设置了一个应用程序框架，该框架使用 maven-gae-plugin。我已将 maven-gae-plugin 版本更改为 0.9.2 以及生成的 pom.xml 中的其他几个版本
<spring.version>3.0.6.RELEASE</spring.version>
<spring-security.version>3.1.0.RELEASE</spring-security.version>
<gae.version>1.6.0</gae.version>
编译可以，运行mvn gae:run，不行，但是没关系。从 Eclipse、运行方式、Web 应用程序找不到 appengine 开发服务器主类:
Exception in thread "main" java.lang.NoClassDefFoundError:
com/google/appengine/tools/development/DevAppServerMain
Caused by: java.lang.ClassNotFoundException:
com.google.appengine.tools.development.DevAppServerMain
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
Could not find the main class:
com.google.appengine.tools.development.DevAppServerMain. Program will exit.
这是我的pom.xml
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.technowobble</groupId>
<artifactId>technowobble</artifactId>
<packaging>war</packaging>
<version>0.1.0.BUILD-SNAPSHOT</version>
<name>technowobble</name>
<properties>
<roo.version>1.1.5.RELEASE</roo.version>
<spring.version>3.0.6.RELEASE</spring.version>
<spring-security.version>3.1.0.RELEASE</spring-security.version>
<aspectj.version>1.6.11</aspectj.version>
<slf4j.version>1.6.1</slf4j.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<gae.home>${user.home}/.m2/repository/com/google/appengine/appengine-java-sdk/1.6.0/appengine-java-sdk-1.6.0</gae.home>
<gae.version>1.6.0</gae.version>
</properties>
<repositories>
<repository>
<id>spring-maven-release</id>
<name>Spring Maven Release Repository</name>
<url>http://maven.springframework.org/release</url>
</repository>
<repository>
<id>spring-maven-milestone</id>
<name>Spring Maven Milestone Repository</name>
<url>http://maven.springframework.org/milestone</url>
</repository>
<repository>
<id>spring-roo-repository</id>
<name>Spring Roo Repository</name>
<url>http://spring-roo-repository.springsource.org/release</url>
</repository>
<repository>
<id>maven-gae-plugin-repo</id>
<url>http://maven-gae-plugin.googlecode.com/svn/repository</url>
<name>maven-gae-plugin repository</name>
</repository>
<repository>
<id>DataNucleus_2</id>
<url>http://www.datanucleus.org/downloads/maven2/</url>
<name>DataNucleus</name>
</repository>
<repository>
<id>JBoss Repo</id>
<url>https://repository.jboss.org/nexus/content/repositories/releases</url>
<name>JBoss Repo</name>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-maven-release</id>
<name>Spring Maven Release Repository</name>
<url>http://maven.springframework.org/release</url>
</pluginRepository>
<pluginRepository>
<id>spring-maven-milestone</id>
<name>Spring Maven Milestone Repository</name>
<url>http://maven.springframework.org/milestone</url>
</pluginRepository>
<pluginRepository>
<id>spring-roo-repository</id>
<name>Spring Roo Repository</name>
<url>http://spring-roo-repository.springsource.org/release</url>
</pluginRepository>
<pluginRepository>
<id>maven-gae-plugin-repo</id>
<url>http://maven-gae-plugin.googlecode.com/svn/repository</url>
<name>maven-gae-plugin repository</name>
</pluginRepository>
<pluginRepository>
<id>DataNucleus_2</id>
<url>http://www.datanucleus.org/downloads/maven2/</url>
</pluginRepository>
</pluginRepositories>
<dependencies>
<!-- General dependencies for standard applications -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>${aspectj.version}</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>${aspectj.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>net.sf.flexjson</groupId>
<artifactId>flexjson</artifactId>
<version>2.1</version>
</dependency>
<!-- ROO dependencies -->
<dependency>
<groupId>org.springframework.roo</groupId>
<artifactId>org.springframework.roo.annotations</artifactId>
<version>${roo.version}</version>
<scope>provided</scope>
</dependency>
<!-- Spring dependencies -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>com.google.appengine.orm</groupId>
<artifactId>datanucleus-appengine</artifactId>
<version>1.0.10</version>
<classifier />
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-1.0-sdk</artifactId>
<version>${gae.version}</version>
<classifier />
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-testing</artifactId>
<version>${gae.version}</version>
<scope>test</scope>
<classifier />
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-stubs</artifactId>
<version>${gae.version}</version>
<scope>test</scope>
<classifier />
</dependency>
<dependency>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-api-labs</artifactId>
<version>${gae.version}</version>
<scope>test</scope>
<classifier />
</dependency>
<dependency>
<groupId>javax.persistence</groupId>
<artifactId>persistence-api</artifactId>
<version>1.0</version>
<classifier />
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>1.1.5</version>
<scope>runtime</scope>
<classifier />
<exclusions>
<exclusion>
<groupId>javax.transaction</groupId>
<artifactId>transaction-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-jpa</artifactId>
<version>1.1.5</version>
<classifier />
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-rdbms</artifactId>
<version>1.1.5</version>
<classifier />
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-enhancer</artifactId>
<version>1.1.4</version>
<classifier />
</dependency>
<dependency>
<groupId>javax.jdo</groupId>
<artifactId>jdo2-api</artifactId>
<version>2.3-ec</version>
<classifier />
<exclusions>
<exclusion>
<groupId>javax.transaction</groupId>
<artifactId>transaction-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.1.0.Final</version>
<classifier />
<exclusions>
<exclusion>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
</exclusion>
<exclusion>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.0.0.GA</version>
<classifier />
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib-nodep</artifactId>
<version>2.2</version>
<classifier />
</dependency>
<dependency>
<groupId>javax.transaction</groupId>
<artifactId>jta</artifactId>
<version>1.1</version>
<classifier />
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
<classifier />
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
<classifier />
</dependency>
<dependency>
<groupId>commons-pool</groupId>
<artifactId>commons-pool</artifactId>
<version>1.5.4</version>
<classifier />
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.3</version>
<classifier />
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
<exclusion>
<groupId>commons-pool</groupId>
<artifactId>commons-pool</artifactId>
</exclusion>
<exclusion>
<groupId>xerces</groupId>
<artifactId>xerces</artifactId>
</exclusion>
<exclusion>
<groupId>xerces</groupId>
<artifactId>xercesImpl</artifactId>
</exclusion>
<exclusion>
<groupId>xml-apis</groupId>
<artifactId>xml-apis</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
<classifier />
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
<classifier />
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.webflow</groupId>
<artifactId>spring-js-resources</artifactId>
<version>2.2.1.RELEASE</version>
<classifier />
</dependency>
<dependency>
<groupId>commons-digester</groupId>
<artifactId>commons-digester</artifactId>
<version>2.0</version>
<classifier />
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.2.1</version>
<classifier />
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>javax.servlet.jsp.jstl</groupId>
<artifactId>jstl-api</artifactId>
<version>1.2</version>
<classifier />
</dependency>
<dependency>
<groupId>org.glassfish.web</groupId>
<artifactId>jstl-impl</artifactId>
<version>1.2</version>
<classifier />
</dependency>
<dependency>
<groupId>javax.el</groupId>
<artifactId>el-api</artifactId>
<version>1.0</version>
<scope>provided</scope>
<classifier />
</dependency>
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>1.6</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
<classifier />
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.4</version>
<classifier />
</dependency>
<dependency>
<groupId>org.apache.tiles</groupId>
<artifactId>tiles-core</artifactId>
<version>2.2.1</version>
<classifier />
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.tiles</groupId>
<artifactId>tiles-jsp</artifactId>
<version>2.2.1</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-core</artifactId>
<version>${spring-security.version}</version>
<classifier />
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
<version>${spring-security.version}</version>
<classifier />
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
<version>${spring-security.version}</version>
<classifier />
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-taglibs</artifactId>
<version>${spring-security.version}</version>
<classifier />
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-openid</artifactId>
<version>${spring-security.version}</version>
<exclusions>
<exclusion>
<groupId>org.openid4java</groupId>
<artifactId>openid4java</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.openid4java</groupId>
<artifactId>openid4java-consumer</artifactId>
<version>0.9.6</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>10.0.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.1.1</version>
<!-- <configuration> <webXml>target/web.xml</webXml> </configuration> -->
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>aspectj-maven-plugin</artifactId>
<version>1.2</version>
<!-- NB: do use 1.3 or 1.3.x due to MASPECTJ-90 - wait for 1.4 -->
<dependencies>
<!-- NB: You must use Maven 2.0.9 or above or these are ignored (see MNG-2972) -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>${aspectj.version}</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjtools</artifactId>
<version>${aspectj.version}</version>
</dependency>
</dependencies>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>test-compile</goal>
</goals>
</execution>
</executions>
<configuration>
<outxml>true</outxml>
<aspectLibraries>
<aspectLibrary>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
</aspectLibrary>
</aspectLibraries>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.5</version>
<configuration>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.8</version>
<configuration>
<printSummary>false</printSummary>
<redirectTestOutputToFile>true</redirectTestOutputToFile>
<excludes>
<exclude>**/*_Roo_*</exclude>
</excludes>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.2.1</version>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.6</version>
</plugin>
<!-- IDE -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.7</version>
<!-- Note 2.8 does not work with AspectJ aspect path -->
<configuration>
<downloadSources>true</downloadSources>
<downloadJavadocs>true</downloadJavadocs>
<wtpversion>2.0</wtpversion>
<additionalBuildcommands>
<buildCommand>
<name>org.eclipse.ajdt.core.ajbuilder</name>
<arguments>
<aspectPath>org.springframework.aspects</aspectPath>
</arguments>
</buildCommand>
<buildCommand>
<name>org.springframework.ide.eclipse.core.springbuilder</name>
</buildCommand>
<buildCommand>
<name>com.google.appengine.eclipse.core.enhancerbuilder</name>
</buildCommand>
</additionalBuildcommands>
<additionalProjectnatures>
<projectnature>org.eclipse.ajdt.ui.ajnature</projectnature>
<projectnature>com.springsource.sts.roo.core.nature</projectnature>
<projectnature>org.springframework.ide.eclipse.core.springnature</projectnature>
<projectnature>com.google.appengine.eclipse.core.gaeNature</projectnature>
<projectnature>com.google.gdt.eclipse.core.webAppNature</projectnature>
</additionalProjectnatures>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-idea-plugin</artifactId>
<version>2.2</version>
<configuration>
<downloadSources>true</downloadSources>
<dependenciesAsLibraries>true</dependenciesAsLibraries>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>tomcat-maven-plugin</artifactId>
<version>1.1</version>
</plugin>
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>7.4.2.v20110526</version>
<configuration>
<webAppConfig>
<contextPath>/${project.name}</contextPath>
</webAppConfig>
</configuration>
</plugin>
<plugin>
<groupId>net.kindleit</groupId>
<artifactId>maven-gae-plugin</artifactId>
<version>0.9.2</version>
<configuration>
<unpackVersion>1.6.0</unpackVersion>
</configuration>
<executions>
<execution>
<phase>validate</phase>
<goals>
<goal>unpack</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.datanucleus</groupId>
<artifactId>maven-datanucleus-plugin</artifactId>
<version>1.1.4</version>
<configuration>
<fork>false</fork>
<log4jConfiguration>${basedir}/src/main/resources/log4j.properties</log4jConfiguration>
<mappingIncludes>**/*.class</mappingIncludes>
<verbose>true</verbose>
<enhancerName>ASM</enhancerName>
<api>JPA</api>
<mappingExcludes>**/GaeAuthFilter.class</mappingExcludes>
</configuration>
<executions>
<execution>
<phase>compile</phase>
<goals>
<goal>enhance</goal>
</goals>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-core</artifactId>
<version>1.1.5</version>
<classifier />
<exclusions>
<exclusion>
<groupId>javax.transaction</groupId>
<artifactId>transaction-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-rdbms</artifactId>
<version>1.1.5</version>
<classifier />
</dependency>
<dependency>
<groupId>org.datanucleus</groupId>
<artifactId>datanucleus-enhancer</artifactId>
<version>1.1.4</version>
<classifier />
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</project>
我错过了什么？
更新:现在我可以使用 mvn gae:run 运行应用程序，我对此感到非常高兴。我发现this question ，我添加了作用域运行时并且它起作用了。
<dependency>
<groupId>com.google.appengine.orm</groupId>
<artifactId>datanucleus-appengine</artifactId>
<version>1.0.10</version>
<scope>runtime</scope>
<classifier />
</dependency>
这个问题中提到的问题(找不到DevAppServerMain)仍然没有解决，虽然不再是一个拦截器，但我很想知道如何解决它。
最佳答案
似乎找不到 DevAppServerMain，它位于 appengine-tools-api.jar 中，请确保它位于您的类路径中且在您的 Maven 类路径之前。
关于java - ClassNotFoundException : com. google.appengine.tools.development.DevAppServerMain，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/8487577/