我是Google Calendar API的新手。我在这里要做的是使用用户提供的电子邮件将活动发布到Google日历。我现在的问题是，当我尝试进行配置时，我得到了这个例外：
Caused by: java.lang.ClassNotFoundException: com.google.api.client.util.Preconditions
我尝试了不同版本的google api，但我找不到哪个jar包含这个类。我的代码中导致此异常的部分是：
GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(
httpTransport, jsonFactory, clientId, clientSecret,
Arrays.asList(CalendarScopes.CALENDAR)).setAccessType("online")
.setApprovalPrompt("auto").build();
提前感谢任何有帮助的人。
这是我的pom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>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<licenses>
<license>
<name>Apache License, Version 2.0</name>
<distribution>repo</distribution>
<url>http://www.apache.org/licenses/LICENSE-2.0.html</url>
</license>
</licenses>
<properties>
<!-- Explicitly declaring the source encoding eliminates the following
message: -->
<!-- [WARNING] Using platform encoding (UTF-8 actually) to copy filtered
resources, i.e. build is platform dependent! -->
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<!-- JBoss dependency versions -->
<version.jboss.maven.plugin>7.4.Final</version.jboss.maven.plugin>
<!-- Define the version of the JBoss BOMs we want to import to specify
tested stacks. -->
<version.jboss.bom>1.0.7.Final</version.jboss.bom>
<!-- other plugin versions -->
<version.surefire.plugin>2.10</version.surefire.plugin>
<version.war.plugin>2.1.1</version.war.plugin>
<version.compiler.plugin>3.1</version.compiler.plugin>
<!-- maven-compiler-plugin -->
<maven.compiler.target>1.7</maven.compiler.target>
<maven.compiler.source>1.7</maven.compiler.source>
</properties>
<repositories>
<repository>
<id>jboss-repo</id>
<url>http://repository.jboss.org/nexus/content/groups/public-jboss/</url>
</repository>
<repository>
<id>prime-repo</id>
<name>PrimeFaces Maven Repository</name>
<url>http://repository.primefaces.org</url>
</repository>
<repository>
<id>mobicents-public-repository-group</id>
<name>Mobicens Public Maven Repository Group</name>
<url>https://oss.sonatype.org/content/groups/public</url>
<layout>default</layout>
<releases>
<enabled>true</enabled>
<updatePolicy>never</updatePolicy>
</releases>
<snapshots>
<enabled>true</enabled>
<updatePolicy>never</updatePolicy>
</snapshots>
</repository>
</repositories>
<dependencyManagement>
<dependencies>
<!-- JBoss distributes a complete set of Java EE 6 APIs including a Bill
of Materials (BOM). A BOM specifies the versions of a "stack" (or a collection)
of artifacts. We use this here so that we always get the correct versions
of artifacts. Here we use the jboss-javaee-6.0-with-tools stack (you can
read this as the JBoss stack of the Java EE 6 APIs, with some extras tools
for your project, such as Arquillian for testing) and the jboss-javaee-6.0-with-hibernate
stack you can read this as the JBoss stack of the Java EE 6 APIs, with extras
from the Hibernate family of projects) -->
<dependency>
<groupId>org.jboss.bom</groupId>
<artifactId>jboss-javaee-6.0-with-tools</artifactId>
<version>${version.jboss.bom}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.jboss.bom</groupId>
<artifactId>jboss-javaee-6.0-with-hibernate</artifactId>
<version>${version.jboss.bom}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.jboss.bom</groupId>
<artifactId>jboss-javaee-6.0-with-security</artifactId>
<version>${version.jboss.bom}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<!-- First declare the APIs we depend on and need for compilation. All
of them are provided by JBoss AS 7 -->
<!-- Import the CDI API, we use provided scope as the API is included in
JBoss AS 7 -->
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<scope>provided</scope>
</dependency>
<!-- Import the Common Annotations API (JSR-250), we use provided scope
as the API is included in JBoss AS 7 -->
<dependency>
<groupId>org.jboss.spec.javax.annotation</groupId>
<artifactId>jboss-annotations-api_1.1_spec</artifactId>
<scope>provided</scope>
</dependency>
<!-- Import the JAX-RS API, we use provided scope as the API is included
in JBoss AS 7 -->
<dependency>
<groupId>org.jboss.spec.javax.ws.rs</groupId>
<artifactId>jboss-jaxrs-api_1.1_spec</artifactId>
<scope>provided</scope>
</dependency>
<!-- Import the JPA API, we use provided scope as the API is included in
JBoss AS 7 -->
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.0-api</artifactId>
<scope>provided</scope>
</dependency>
<!-- Import the EJB API, we use provided scope as the API is included in
JBoss AS 7 -->
<dependency>
<groupId>org.jboss.spec.javax.ejb</groupId>
<artifactId>jboss-ejb-api_3.1_spec</artifactId>
<scope>provided</scope>
</dependency>
<!-- JSR-303 (Bean Validation) Implementation -->
<!-- Provides portable constraints such as @Email -->
<!-- Hibernate Validator is shipped in JBoss AS 7 -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<scope>provided</scope>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- Import the JSF API, we use provided scope as the API is included in
JBoss AS 7 -->
<dependency>
<groupId>org.jboss.spec.javax.faces</groupId>
<artifactId>jboss-jsf-api_2.1_spec</artifactId>
<scope>provided</scope>
</dependency>
<!-- Now we declare any tools needed -->
<!-- Annotation processor to generate the JPA 2.0 metamodel classes for
typesafe criteria queries -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-jpamodelgen</artifactId>
<scope>provided</scope>
</dependency>
<!-- Annotation processor that raising compilation errors whenever constraint
annotations are incorrectly used. -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator-annotation-processor</artifactId>
<scope>provided</scope>
</dependency>
<!-- Needed for running tests (you may also use TestNG) -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
<!-- Optional, but highly recommended -->
<!-- Arquillian allows you to test enterprise code such as EJBs and Transactional(JTA)
JPA from JUnit/TestNG -->
<dependency>
<groupId>org.jboss.arquillian.junit</groupId>
<artifactId>arquillian-junit-container</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.arquillian.protocol</groupId>
<artifactId>arquillian-protocol-servlet</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.spec.javax.el</groupId>
<artifactId>jboss-el-api_2.2_spec</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
</dependency>
<dependency>
<groupId>org.antlr</groupId>
<artifactId>ST4</artifactId>
<version>4.0.7</version>
</dependency>
<dependency>
<groupId>org.primefaces</groupId>
<artifactId>primefaces</artifactId>
<version>4.0</version>
</dependency>
<dependency>
<groupId>org.primefaces.extensions</groupId>
<artifactId>primefaces-extensions</artifactId>
<version>1.1.0</version>
</dependency>
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.0</version>
</dependency>
<!-- For File upload tag -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.8</version>
</dependency>
<dependency>
<groupId>commons-beanutils</groupId>
<artifactId>commons-beanutils</artifactId>
<version>1.8.3</version>
</dependency>
<dependency>
<groupId>commons-collections</groupId>
<artifactId>commons-collections</artifactId>
<version>3.2.1</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1.3</version>
</dependency>
<!-- For MimeType detection of uploaded files -->
<dependency>
<groupId>jmimemagic</groupId>
<artifactId>jmimemagic</artifactId>
<version>0.1.2</version>
<scope>compile</scope>
</dependency>
<!-- For splitting pdf into individual pages -->
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itextpdf</artifactId>
<version>5.3.4</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.5</version>
</dependency>
<dependency>
<groupId>org.omnifaces</groupId>
<artifactId>omnifaces</artifactId>
<version>1.6.3</version>
</dependency>
<!-- SIP servlet, cool stuff starts here -->
<dependency>
<groupId>org.mobicents.servlet.sip</groupId>
<artifactId>sip-servlets-spec</artifactId>
<version>2.1.0-SNAPSHOT</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.mobicents.servlet.sip</groupId>
<artifactId>sip-servlets-client</artifactId>
<version>2.1.0-SNAPSHOT</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.2.4</version>
</dependency>
<dependency>
<groupId>com.google.apis</groupId>
<artifactId>google-api-services-calendar</artifactId>
<version>v3-rev74-1.17.0-rc</version>
</dependency>
<dependency>
<groupId>com.google.api-client</groupId>
<artifactId>google-api-client</artifactId>
<version>1.17.0-rc</version>
</dependency>
<dependency>
<groupId>com.google.http-client</groupId>
<artifactId>google-http-client-jackson2</artifactId>
<version>1.12.0-beta</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.10-beta1</version>
</dependency>
<dependency>
<groupId>org.primefaces.themes</groupId>
<artifactId>bootstrap</artifactId>
<version>1.0.10</version>
</dependency>
<dependency>
<groupId>javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.12.1.GA</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
</dependency>
<dependency>
<groupId>org.jboss.as</groupId>
<artifactId>jboss-as-controller-client</artifactId>
<version>7.2.0.Final</version>
</dependency>
<dependency>
<groupId>org.jboss.as.plugins</groupId>
<artifactId>jboss-as-maven-plugin</artifactId>
<version>7.5.Final</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.jboss.spec.javax.servlet</groupId>
<artifactId>jboss-servlet-api_3.0_spec</artifactId>
</dependency>
<dependency>
<groupId>org.jboss.seam.security</groupId>
<artifactId>seam-security</artifactId>
<version>3.2.0.Final</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-client</artifactId>
<version>1.8</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.8.5</version>
</dependency>
<dependency>
<groupId>org.jboss.seam.faces</groupId>
<artifactId>seam-faces</artifactId>
<version>3.2.0.Final</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>net.sf.jsr107cache</groupId>
<artifactId>jsr107cache</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>javax.jdo</groupId>
<artifactId>jdo2-api</artifactId>
<version>2.3-eb</version>
</dependency>
</dependencies>
<build>
<!-- Maven will append the version to the finalName (which is the name
given to the generated war, and hence the context root) -->
<finalName>${project.artifactId}</finalName>
<plugins>
<!-- Compiler plugin enforces Java 1.6 compatibility and activates annotation
processors -->
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>${version.compiler.plugin}</version>
<configuration>
<source>${maven.compiler.source}</source>
<target>${maven.compiler.target}</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>${version.war.plugin}</version>
<configuration>
<!-- Java EE 6 doesn't require web.xml, Maven needs to catch up! -->
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<!-- The JBoss AS plugin deploys your war to a local JBoss AS container -->
<!-- To use, run: mvn package jboss-as:deploy -->
<plugin>
<groupId>org.jboss.as.plugins</groupId>
<artifactId>jboss-as-maven-plugin</artifactId>
<version>${version.jboss.maven.plugin}</version>
</plugin>
</plugins>
</build>
<profiles>
<profile>
<!-- The default profile skips all tests, though you can tune it to run
just unit tests based on a custom pattern -->
<!-- Seperate profiles are provided for running all tests, including Arquillian
tests that execute in the specified container -->
<id>default</id>
<activation>
<activeByDefault>true</activeByDefault>
</activation>
<build>
<plugins>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>${version.surefire.plugin}</version>
<configuration>
<skip>true</skip>
</configuration>
</plugin>
</plugins>
</build>
</profile>
<profile>
<!-- An optional Arquillian testing profile that executes tests in your
JBoss AS instance -->
<!-- This profile will start a new JBoss AS instance, and execute the
test, shutting it down when done -->
<!-- Run with: mvn clean test -Parq-jbossas-managed -->
<id>arq-jbossas-managed</id>
<dependencies>
<dependency>
<groupId>org.jboss.as</groupId>
<artifactId>jboss-as-arquillian-container-managed</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
</profile>
<profile>
<!-- An optional Arquillian testing profile that executes tests in a remote
JBoss AS instance -->
<!-- Run with: mvn clean test -Parq-jbossas-remote -->
<id>arq-jbossas-remote</id>
<dependencies>
<dependency>
<groupId>org.jboss.as</groupId>
<artifactId>jboss-as-arquillian-container-remote</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
</profile>
<profile>
<!-- When built in OpenShift the 'openshift' profile will be used when
invoking mvn. -->
<!-- Use this profile for any OpenShift specific customization your app
will need. -->
<!-- By default that is to put the resulting archive into the 'deployments'
folder. -->
<!-- http://maven.apache.org/guides/mini/guide-building-for-different-environments.html -->
<id>openshift</id>
<build>
<plugins>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>${version.war.plugin}</version>
<configuration>
<outputDirectory>deployments</outputDirectory>
<warName>ROOT</warName>
</configuration>
</plugin>
</plugins>
</build>
</profile>
</profiles>
</project>
答案 0 :(得分：1)
模块google-api-client和google-http-client-jackson2之间似乎存在版本冲突。它们必须具有相同的版本1.17.0-rc。