用于Maven的java.lang.NoClassDefFoundError

Question

Exception in thread "main" java.lang.NoClassDefFoundError: javax/ws/rs/core/Mul
ivaluedMap
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
    at java.lang.Class.privateGetMethodRecursive(Unknown Source)
    at java.lang.Class.getMethod0(Unknown Source)
    at java.lang.Class.getMethod(Unknown Source)
    at sun.launcher.LauncherHelper.validateMainClass(Unknown Source)
    at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: javax.ws.rs.core.MultivaluedMap
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 7 more

这是我当前拥有的pom文件：http://maven.apache.org/xsd/maven-4.0.0.xsd“>4.0.0

<groupId>com.test.api</groupId>
<artifactId>testing</artifactId>
<packaging>jar</packaging>
<version>0.1.0</version>
<name>testPlatform</name>

<properties>
    <source.version>1.7</source.version>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<build>
    <plugins>

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.1</version>
            <configuration>
                <source>1.7</source>
                <target>1.7</target>
            </configuration>
        </plugin>

    </plugins>
</build>

<dependencies>
    <dependency>
  <groupId>junit</groupId>
  <artifactId>junit</artifactId>
  <version>3.8.1</version>
  <scope>test</scope>
</dependency>
    <!-- REST client -->
    <dependency>
        <groupId>org.glassfish.jersey.core</groupId>
        <artifactId>jersey-client</artifactId>
        <version>2.9.1</version>
    </dependency>

    <dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>jsr311-api</artifactId>
<version>0.11</version>
 </dependency>

    <dependency>
        <groupId>joda-time</groupId>
        <artifactId>joda-time</artifactId>
        <version>2.3</version>
    </dependency>

    <!-- for deserialization -->
    <dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
        <version>2.2.4</version>
    </dependency>



</dependencies>

Answer 1

我很肯定我知道你的问题。

您正在使用Maven编译代码并生成jar文件。

然后，您尝试使用某个java命令行或其他命令行从maven外部执行该jar文件。

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-dependency-plugin</artifactId>
    <executions>
      <execution>
        <id>build-classpath</id>
        <phase>generate-sources</phase>
        <goals>
           <goal>build-classpath</goal>
        </goals>
        <configuration>
         <outputFile>${project.build.directory}/classpath.txt</outputFile>
        </configuration>
      </execution>
    </executions>
  </plugin>