我有一个java类filter2,我想用一个shell脚本run2.sh来运行它。问题是我不知道如何在shell脚本中输入2个参数($1和$2)。
public class Filter2 {
public static void main(String[] args) throws Exception {
Configuration conf = new Configuration();
String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();
conf.set("limit", otherArgs[0]);
conf.set("limit2", otherArgs[1]);//added here
Job job = new Job(conf, "Distributed Filter");
job.setJarByClass(Filter2.class);
job.setMapperClass(FilterMapper.class);
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(IntWritable.class);
job.setNumReduceTasks(0); // Set number of reducers to zero
FileInputFormat.addInputPath(job, new Path(args[1]));
FileOutputFormat.setOutputPath(job, new Path(args[2]));
System.exit(job.waitForCompletion(true) ? 0 : 1);
}
public static class FilterMapper
extends Mapper<Object, Text, Text, IntWritable>{
private final static IntWritable counter = new IntWritable(0);
private Text word = new Text();
private Integer total;
private Integer limit;
private Integer limit2;//added here
public void map(Object key, Text value, Context context
) throws IOException, InterruptedException {
StringTokenizer itr = new StringTokenizer(value.toString());
limit = Integer.parseInt( context.getConfiguration().get("limit") );
limit2 = Integer.parseInt( context.getConfiguration().get("limit2") );
while (itr.hasMoreTokens()) {
word.set(itr.nextToken());
total = Integer.parseInt(itr.nextToken());//added here
if ((total > limit)&&(total<limit2))//added here
{ counter.set( total );
context.write(word, counter); }
}
}
}
}
运行2.sh
$HADOOP_HOME/bin/hadoop jar Filter2.jar Filter2 $1 sales.txt /user/solution2/
我想在终端“./run.sh4550”中用shell脚本运行java,但我不能输入2个参数。如何修改shell脚本以启用此结果?
1条答案
按热度按时间gfttwv5a1#
如果要向脚本传递多个参数,则变量的名称将递增。
如果你用
你会看到的
在控制台上(加上hadoop命令所做的一切)。注意
$2
在hadoop系列中。这是第二个脚本参数。把它移到需要的地方。