在写hadoop程序编译时，往往需要HADOOP_CLASSPATH路径，可通过以下方式进行在编译脚本中设置：

for f in $HADOOP_HOME/hadoop-*.jar; do
CLASSPATH=${CLASSPATH}:$f
done

for f in $HADOOP_HOME/lib/*.jar; do
CLASSPATH=${CLASSPATH}:$f
done

for f in $HIVE_HOME/lib/*.jar; do
CLASSPATH=${CLASSPATH}:$f
done