shell脚本--linux终端运行hadoop--java文件
假设保存为test.sh,java文件为wc.java,【注：会打包成1.jar】,main函数所在类为wc,hdfs上输入目录地址为input，hdfs上输出目录地址为output【注：输入目录和输出目录非必须】
运行：
./test.sh wc.java wc input output
#!/bin/bash#echo "$# $0 $1 $2"HH=$HADOOP_HOMEif [ $# -lt 2 ];then echo "usage: jc.sh source.java ClassName [InputFile] [OutputFile]" exit 0elif [ ${1##*.} != "java" ];then echo "Notice: source.java java!" exit 0elserm -r ./classes/*javac -classpath $HH/hadoop-mapred-0.22.0.jar:$HH/hadoop-hdfs-0.22.0.jar:$HH/hadoop-common-0.22.0.jar:$HH/lib/commons-cli-1.2.jar -d classes ./$1jar -cvf 1.jar -C classes/ .echo "==============Output====================="if [ $# -eq 2 ];then hadoop jar 1.jar $2elif [ $# -eq 3 ];then hadoop jar 1.jar $2 $3elif [ $# -eq 4 ];then hadoop jar 1.jar $2 $3 $4fiecho "========================================="rm 1.jarfi