通過（關(guān)系型是statement和sql進(jìn)行增刪）啥進(jìn)行增刪改查的？是api提供類或方法操作HMaster來進(jìn)行的嗎？類似PreparedStatement（貌似是jdbc api提供）編譯sql進(jìn)行操作？有沒有類似mysql數(shù)據(jù)庫進(jìn)行建表等操作啊，也就是數(shù)據(jù)庫詳細(xì)設(shè)計(jì)階段中比如建表索引等是通過后臺(tái)的什么東西操作的（mysql等關(guān)系型是通過sql在后臺(tái)操作）？通過數(shù)據(jù)庫后臺(tái)查詢一條記錄是通過什么工具（關(guān)系型是第三方工具或者后臺(tái)的sql界面）以怎么的方式（關(guān)系型是表格）進(jìn)行顯示的??？講講用HBase具體怎么搭建分布式數(shù)據(jù)環(huán)境啊，不是安裝HBase,類似與在mysql數(shù)據(jù)庫中創(chuàng)建一個(gè)具體的數(shù)據(jù)庫，其他含有表格等，也就是一個(gè)完整的數(shù)據(jù)庫出來。（學(xué)習(xí)中，問題很多很模糊）
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給你一個(gè)類的代碼，你看看就知道怎么連接的了 import java.io.IOException;import java.util.Map; import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.hbase.HBaseConfiguration;import org.apache.hadoop.hbase.HColumnDescriptor;import org.apache.hadoop.hbase.HTableDescriptor;import org.apache.hadoop.hbase.client.HBaseAdmin;import org.apache.hadoop.hbase.client.HTable;import org.apache.hadoop.hbase.client.Put;import org.apache.hadoop.hbase.client.Result; public class Htable { public static void main(String[] args) throws IOException {// Configuration hbaseConf = HBaseConfiguration.create(); Configuration HBASE_CONFIG = new Configuration(); //與hbase/conf/hbase-site.xml中hbase.master配置的值相同 HBASE_CONFIG.set("hbase.master", "9.186.89.27:60000"); //與hbase/conf/hbase-site.xml中hbase.zookeeper.quorum配置的值相同 HBASE_CONFIG.set("hbase.zookeeper.quorum", "9.186.89.27,9.186.89.29,9.186.89.31,9.186.89.33,9.186.89.34"); //與hbase/conf/hbase-site.xml中hbase.zookeeper.property.clientPort配置的值相同 HBASE_CONFIG.set("hbase.zookeeper.property.clientPort", "2181"); Configuration hbaseConf = HBaseConfiguration.create(HBASE_CONFIG); HBaseAdmin admin = new HBaseAdmin(hbaseConf); // set the name of table HTableDescriptor htableDescriptor = new HTableDescriptor("test11".getBytes()); // set the name of column clusters htableDescriptor.addFamily(new HColumnDescriptor("cf1")); if (admin.tableExists(htableDescriptor.getName())) { admin.disableTable(htableDescriptor.getName()); admin.deleteTable(htableDescriptor.getName()); } // create a table admin.createTable(htableDescriptor); // get instance of table. HTable table = new HTable(hbaseConf, "test11"); // for is number of rows for (int i = 0; i < 3; i++) { // the ith row Put putRow = new Put(("row" + i).getBytes()); // set the name of column and value. putRow.add("cf1".getBytes(), (i+"col1").getBytes(), (i+"vaule1").getBytes()); putRow.add("cf1".getBytes(), (i+"col2").getBytes(), (i+"vaule2").getBytes()); putRow.add("cf1".getBytes(), (i+"col3").getBytes(), (i+"vaule3").getBytes()); table.put(putRow); } // get data of column clusters for (Result result : table.getScanner("cf1".getBytes())) { // get collection of result for (Map.Entry<byte[], byte[]> entry : result.getFamilyMap("cf1".getBytes()).entrySet()) { String column = new String(entry.getKey()); String value = new String(entry.getValue()); System.out.println(column + "," + value); } } }} |
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