From jdk 1.6, the java web services package and the related files were bundled with the JDK. The best solution therefore is to upgrade to the latest jdk (jdk 1.7). If even after installing the jdk 1.7, you still get this error, then check your JAVA_HOME environment variable and the PATH environment variable. Both these variables should be updated and pointed to your jdk 1.7 installation folder.
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