public static void Test() throws URISyntaxException, IOException {
      System.out.println("开始执行");     //初始化Hbase连接     Configuration configuration = HBaseConfiguration.create();     //加载配置文件     configuration.addResource(new Path(ClassLoader.getSystemResource("hbase-site.xml").toURI()));     configuration.addResource(new Path(ClassLoader.getSystemResource("core-site.xml").toURI()));     Connection connection = ConnectionFactory.createConnection(configuration);     System.out.println("连接成功！");     //设置表名     TableName tableName = TableName.valueOf("xuehu01");     //将表名传递给HTableDescriptor     HTableDescriptor hTableDescriptor = new HTableDescriptor(tableName);     //创建列族     HColumnDescriptor mycg = new HColumnDescriptor("mycg");     //将列族添加进表中     hTableDescriptor.addFamily(mycg);     //Admin是操作表的类，具有创建     Admin admin = connection.getAdmin();     admin.createTable(hTableDescriptor);     if (admin.tableExists(hTableDescriptor.getTableName()))     {
          admin.disableTable(hTableDescriptor.getTableName());         admin.deleteTable(hTableDescriptor.getTableName());     }     admin.createTable(hTableDescriptor);     System.out.println("创建列族");     //设置列族的压缩方式为GZ     mycg.setCompactionCompressionType(Compression.Algorithm.GZ);     //把最大版本数修改为ALL.VERSION,其实就是Integer.MAX_VALUE     mycg.setMaxVersions(HConstants.ALL_VERSIONS);     //把列族的定义更新到表定义里面去     hTableDescriptor.modifyFamily(mycg);     //不过此时对表的修改还没有真正执行下去，只有调用Admin类来进行操作的时候才真正开始执行     //当执行了modifyTable方法后，对表的修改才真正完成     admin.modifyTable(tableName,hTableDescriptor);     //删掉之前建立的列族     //首先进行停用表     admin.disableTable(tableName);     //然后进行删除列族     admin.deleteColumn(tableName,"mycf".getBytes("UTF-8"));     admin.deleteTable(tableName);     admin.close();     connection.close(); }