这是我的密码
public class solution1 {
public static void main(String[] args) throws IOException {
String localStr = args[0];
String hdfsStr = args[1];
Configuration conf = new Configuration();
FileSystem hdfs = FileSystem.get(URI.create(hdfsStr), conf);
FileSystem local = FileSystem.getLocal(conf);
Path inputDir = new Path(localStr);
String folderName = inputDir.getName();
Path hdfsFile = new Path(hdfsStr, folderName);
try {
FileStatus[] inputFiles = local.listStatus(inputDir);
FSDataOutputStream out = hdfs.create(hdfsFile);
for (int i=0; i<inputFiles.length; i++) {
System.out.println(inputFiles[i].getPath().getName());
FSDataInputStream in = local.open(inputFiles[i].getPath());
byte buffer[] = new byte[256];
int bytesRead = 0;
while( (bytesRead = in.read(buffer)) > 0) {
out.write(buffer, 0, bytesRead);
}
in.close();
}
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
我试图用这段代码来循环通过数百个.txt文件这个.txt文件的内容,这个文件有500个
更新
这是我在虚拟框中键入的内容,这是我得到的结果,输出不是预期的输出,没有成功的结果没有成功的结果
它不是读取单个txt文件中的内容
但是如果我使用相同的命令来运行另一个java文件,结果是,它将成功运行。看起来像是在跑
wordcountjava的代码在这里
public class WordCount {
public static void main(String[] args) throws Exception {
Configuration conf = new Configuration();
Job job = Job.getInstance(conf, "word count");
job.setJarByClass(WordCount.class);
job.setMapperClass(TokenizerMapper.class);
job.setCombinerClass(IntSumReducer.class);
job.setReducerClass(IntSumReducer.class);
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(IntWritable.class);
FileInputFormat.addInputPath(job, new Path(args[0]));
FileOutputFormat.setOutputPath(job, new Path(args[1]));
System.exit(job.waitForCompletion(true) ? 0 : 1);
}
public static class TokenizerMapper
extends Mapper<Object, Text, Text, IntWritable>{
private final static IntWritable one = new IntWritable(1);
private Text word = new Text();
public void map(Object key, Text value, Context context
) throws IOException, InterruptedException {
StringTokenizer itr = new StringTokenizer(value.toString());
while (itr.hasMoreTokens()) {
word.set(itr.nextToken());
context.write(word, one);
}
}
}
public static class IntSumReducer
extends Reducer<Text,IntWritable,Text,IntWritable> {
private IntWritable result = new IntWritable();
public void reduce(Text key, Iterable<IntWritable> values,
Context context
) throws IOException, InterruptedException {
int sum = 0;
for (IntWritable val : values) {
sum += val.get();
}
result.set(sum);
context.write(key, result);
}
}
}
我被困住了,真的不知道该怎么办。我应该在virtualbox中键入什么来读取所有500个txt文件?
暂无答案!
目前还没有任何答案,快来回答吧!