程序代码实例如下：package com.hbasedemo;import java.io.IOException;import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.security.UserGroupInformation;public class Test {private static Configuration conf = null;static {// 这个配置文件主要是记录 kerberos的相关配置信息，例如KDC是哪个IP？默认的realm是哪个？// 如果没有这个配置文件这边认证的时候肯定不知道KDC的路径喽// 这个文件也是从远程服务器上copy下来的System. setProperty("java.security.krb5.conf", "C:/Users/dongzeguang/Downloads/krb5.conf" );conf = HBaseConfiguration.create();conf.set("hadoop.security.authentication" , "Kerberos" );// 这个hbase.keytab也是从远程服务器上copy下来的, 里面存储的是密码相关信息// 这样我们就不需要交互式输入密码了conf.set("keytab.file" , "C:/Users/Downloads/hbase.keytab" );// 这个可以理解成用户名信息，也就是Principalconf.set("kerberos.principal" , "hbase/1722.myip.domain@HADOOP.COM" );           UserGroupInformation. setConfiguration(conf);try {UserGroupInformation. loginUserFromKeytab("hbase/1722.myip.domain@HADOOP.COM", "C:/Users/Downloads/hbase.keytab" );} catch (IOException e) {// TODO Auto-generated catch block
                  e.printStackTrace();}}public static void scanSpan(final String tableName) throws Exception {HTable table =  new HTable(conf, tableName);System. out.println("tablename:" +new String(table.getTableName()));Scan s = new Scan();ResultScanner rs = table.getScanner(s);for (Result r : rs) {System. out.println(r.toString());KeyValue[] kv = r. raw();for (int i = 0; i < kv.length; i++) {System. out.print(new String(kv[i].getRow()) + "");System. out.print(new String(kv[i].getFamily()) + ":");System. out.print(new String(kv[i].getQualifier() ) + "" );System. out.print(kv[i].getTimestamp() + "" );System. out.println(new String(kv[i].getValue() ));}}}/*** @param args*/public static void main(String[] args) {// TODO Auto-generated method stubtry {Test. scanSpan("h_span");} catch (Exception e) {// TODO Auto-generated catch block
                  e.printStackTrace();}}}