how add hadoop jars to classpath? - hadoop

Question

Hadoop 2.7.3 on my mac is installed at:
/usr/local/Cellar/hadoop/2.7.3
I write a demo to read file from HDFS using java:
import java.io.*;
import java.net.URI;
import java.net.URISyntaxException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IOUtils;
public class HDFSTest{
public static void main(String[] args) throws IOException, URISyntaxException{
String file= "hdfs://localhost:9000/hw1/customer.tbl";
Configuration conf = new Configuration();
FileSystem fs = FileSystem.get(URI.create(file), conf);
Path path = new Path(file);
FSDataInputStream in_stream = fs.open(path);
BufferedReader in = new BufferedReader(new
InputStreamReader(in_stream));
String s;
while ((s=in.readLine())!=null) {
System.out.println(s);
}
in.close();
fs.close();
}
}
When I compile the java file ,error as shown blow：
hero:Documents yaopan$ javac HDFSTest.java
HDFSTest.java:8: error: package org.apache.hadoop.conf does not exist
import org.apache.hadoop.conf.Configuration;
^
HDFSTest.java:10: error: package org.apache.hadoop.fs does not exist
import org.apache.hadoop.fs.FSDataInputStream;
^
HDFSTest.java:12: error: package org.apache.hadoop.fs does not exist
import org.apache.hadoop.fs.FSDataOutputStream;
^
HDFSTest.java:14: error: package org.apache.hadoop.fs does not exist
import org.apache.hadoop.fs.FileSystem;
I know the reason is can not find hadoop jars，how to configure that？
^

Answer 1

Locate a jar file named "hadoop-common-2.7.3.jar" under your installation (i.e /usr/local/Cellar/hadoop/2.7.3) and set it in classpath or give it directly in the command line along with javac.
javac -cp "/PATH/hadoop-common-2.7.3.jar" HDFSTest.java
(replace PATH with appropriate path)

Answer 2

Just add hadoop jars to classpath:
I install hbase using homebrew on /usr/local/Cellar/hbase/1.2.2,
add all jars under /usr/local/Cellar/hbase/1.2.2/libexec/lib to classpath:
1.edit .bash_profile
sudo vim ~/.bash_profile
2.add classpath
#set hbase lib path
export CLASSPATH=$CLASSPATH://usr/local/Cellar/hbase/1.2.2/libexec/lib/*
save and exit
wq