Question

I created maven project in Eclipse and added a few dependencies.

Here is a full list of dependencies:

<dependencies>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>2.4</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet.jsp</groupId>
        <artifactId>jsp-api</artifactId>
        <version>2.1</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>com.google.caliper</groupId>
        <artifactId>caliper</artifactId>
        <version>0.5-rc1</version>
    </dependency>
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjrt</artifactId>
        <version>1.7.1</version>
    </dependency>
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjweaver</artifactId>
        <version>1.7.1</version>
    </dependency>
</dependencies>

Then I ran Maven install and all nesssery libs were uploaded.

Next time I got the following message:

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building mywebapp 0.0.1-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO] 
[INFO] --- maven-resources-plugin:2.5:resources (default-resources) @ mywebapp ---
[debug] execute contextualize
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory D:\WORK_SPASE\mywebapp\src\main\resources
[INFO] 
[INFO] --- maven-compiler-plugin:2.0.2:compile (default-compile) @ mywebapp ---
[INFO] Compiling 1 source file to D:\WORK_SPACE\mywebapp\target\classes
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.785s
[INFO] Finished at: Thu Jan 31 04:13:10 VET 2013
[INFO] Final Memory: 4M/121M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.0.2:compile (default-compile) on project mywebapp: Compilation failure
[ERROR] error: error reading C:\Users\User1\.m2\repository\com\google\guava\guava\11.0.1\guava-11.0.1.jar; invalid LOC header (bad signature)
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

And when I tried to run my class I got : Exception in thread "main" java.lang.NoClassDefFoundError: com/google/common/base/Splitter

Please give me a piece of advice.

Answer 1

First I see that you have an error:

reading C:\Users\User1.m2\repository\com\google\guava\guava\11.0.1\guava-11.0.1.jar; invalid LOC header (bad signature)

which might be caused by a failure during the download of the lib. The solution is to delete the folder C:\Users\User1.m2\repository\com\google and retry the build.

Furthermore I see that you are using an extremely old version of the maven-compiler-plugin (2.0.2) which brings me to the conclusion that you didn’t configured your maven-compiler-plugin which means you are using java 1.4 but you need at least 1.5. You have to configure your maven-compiler-plugin like this:

<build>
  <pluginManagement>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.0</version>
        <configuration>
          <source>1.6</source>
          <target>1.6</target>
        </configuration>
      </plugin>
    </plugins>
  </pluginManagement>
</build>

Maybe you have to change to 1.5.