please someone can help me ????????

can't find the solution

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...

[WARNING]

[WARNING] Some problems were encountered while building the effective model for fr.ua.iutlens.suivi:webSuiviEtudiant:war:0.0.1-SNAPSHOT

[WARNING] 'build.plugins.plugin.version' for org.apache.maven.plugins:maven-source-plugin is missing. @ line 271, column 12

[WARNING]

[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.

[WARNING]

[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.

[WARNING]

[INFO]                                                                        

[INFO] ------------------------------------------------------------------------

[INFO] Building webSuiviEtudiant 0.0.1-SNAPSHOT

[INFO] ------------------------------------------------------------------------

[INFO]

[INFO] --- maven-clean-plugin:2.4.1:clean (default-clean) @ webSuiviEtudiant ---

[INFO] Deleting C:\Users\toshiba\projetSuiviEtu\webSuiviEtudiant\webSuiviEtudiant\target

[INFO]

[INFO] --- maven-resources-plugin:2.5:resources (default-resources) @ webSuiviEtudiant ---

[debug] execute contextualize

[INFO] Using 'UTF-8' encoding to copy filtered resources.

[INFO] Copying 3 resources

[INFO]

[INFO] --- maven-compiler-plugin:2.3.2:compile (default-compile) @ webSuiviEtudiant ---

[INFO] Compiling 54 source files to C:\Users\toshiba\projetSuiviEtu\webSuiviEtudiant\webSuiviEtudiant\target\classes

[INFO] -------------------------------------------------------------

[ERROR] COMPILATION ERROR :

[INFO] -------------------------------------------------------------

[ERROR] Unable to locate the Javac Compiler in:

  C:\Program Files\Java\jre7\..\lib\tools.jar

Please ensure you are using JDK 1.4 or above and

not a JRE (the com.sun.tools.javac.Main class is required).

In most cases you can change the location of your Java

installation by setting the JAVA_HOME environment variable.

[INFO] 1 error

[INFO] -------------------------------------------------------------

[INFO] ------------------------------------------------------------------------

[INFO] BUILD FAILURE

[INFO] ------------------------------------------------------------------------

[INFO] Total time: 2.683s

[INFO] Finished at: Thu Jan 23 15:47:40 CET 2014

[INFO] Final Memory: 10M/114M

[INFO] ------------------------------------------------------------------------

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile (default-compile) on project webSuiviEtudiant: Compilation failure

[ERROR] Unable to locate the Javac Compiler in:

[ERROR] C:\Program Files\Java\jre7\..\lib\tools.jar

[ERROR] Please ensure you are using JDK 1.4 or above and

[ERROR] not a JRE (the com.sun.tools.javac.Main class is required).

[ERROR] In most cases you can change the location of your Java

[ERROR] installation by setting the JAVA_HOME environment variable.

[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