大数据入门第十四天——Hbase详解(二)基本概念与命令、javaAPI
2018-03-01 20:38
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一、hbase数据模型
package cn.itcast_01_hbase; import java.util.ArrayList; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.hbase.Cell; import org.apache.hadoop.hbase.CellUtil; import org.apache.hadoop.hbase.HBaseConfiguration; import org.apache.hadoop.hbase.HColumnDescriptor; import org.apache.hadoop.hbase.HTableDescriptor; import org.apache.hadoop.hbase.MasterNotRunningException; import org.apache.hadoop.hbase.TableName; import org.apache.hadoop.hbase.ZooKeeperConnectionException; import org.apache.hadoop.hbase.client.Connection; import org.apache.hadoop.hbase.client.ConnectionFactory; import org.apache.hadoop.hbase.client.Delete; import org.apache.hadoop.hbase.client.Get; import org.apache.hadoop.hbase.client.HBaseAdmin; import org.apache.hadoop.hbase.client.HConnection; import org.apache.hadoop.hbase.client.HConnectionManager; import org.apache.hadoop.hbase.client.Put; 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.hbase.client.Table; import org.apache.hadoop.hbase.filter.ColumnPrefixFilter; import org.apache.hadoop.hbase.filter.CompareFilter; import org.apache.hadoop.hbase.filter.FilterList; import org.apache.hadoop.hbase.filter.FilterList.Operator; import org.apache.hadoop.hbase.filter.RegexStringComparator; import org.apache.hadoop.hbase.filter.RowFilter; import org.apache.hadoop.hbase.filter.SingleColumnValueFilter; import org.apache.hadoop.hbase.util.Bytes; import org.junit.After; import org.junit.Before; import org.junit.Test; public class HbaseTest { /** * 配置ss */ static Configuration config = null; private Connection connection = null; private Table table = null; @Before public void init() throws Exception { config = HBaseConfiguration.create();// 配置 config.set("hbase.zookeeper.quorum", "master,work1,work2");// zookeeper地址 config.set("hbase.zookeeper.property.clientPort", "2181");// zookeeper端口 connection = ConnectionFactory.createConnection(config); table = connection.getTable(TableName.valueOf("user")); } /** * 创建一个表 * * @throws Exception */ @Test public void createTable() throws Exception { // 创建表管理类 HBaseAdmin admin = new HBaseAdmin(config); // hbase表管理 // 创建表描述类 TableName tableName = TableName.valueOf("test3"); // 表名称 HTableDescriptor desc = new HTableDescriptor(tableName); // 创建列族的描述类 HColumnDescriptor family = new HColumnDescriptor("info"); // 列族 // 将列族添加到表中 desc.addFamily(family); HColumnDescriptor family2 = new HColumnDescriptor("info2"); // 列族 // 将列族添加到表中 desc.addFamily(family2); // 创建表 admin.createTable(desc); // 创建表 } @Test @SuppressWarnings("deprecation") public void deleteTable() throws MasterNotRunningException, ZooKeeperConnectionException, Exception { HBaseAdmin admin = new HBaseAdmin(config); admin.disableTable("test3"); admin.deleteTable("test3"); admin.close(); } /** * 向hbase中增加数据 * * @throws Exception */ @SuppressWarnings({ "deprecation", "resource" }) @Test public void insertData() throws Exception { table.setAutoFlushTo(false); table.setWriteBufferSize(534534534); ArrayList<Put> arrayList = new ArrayList<Put>(); for (int i = 21; i < 50; i++) { Put put = new Put(Bytes.toBytes("1234"+i)); put.add(Bytes.toBytes("info"), Bytes.toBytes("name"), Bytes.toBytes("wangwu"+i)); put.add(Bytes.toBytes("info"), Bytes.toBytes("password"), Bytes.toBytes(1234+i)); arrayList.add(put); } //插入数据 table.put(arrayList); //提交 table.flushCommits(); } /** * 修改数据 * * @throws Exception */ @Test public void uodateData() throws Exception { Put put = new Put(Bytes.toBytes("1234")); put.add(Bytes.toBytes("info"), Bytes.toBytes("namessss"), Bytes.toBytes("lisi1234")); put.add(Bytes.toBytes("info"), Bytes.toBytes("password"), Bytes.toBytes(1234)); //插入数据 table.put(put); //提交 table.flushCommits(); } /** * 删除数据 * * @throws Exception */ @Test public void deleteDate() throws Exception { Delete delete = new Delete(Bytes.toBytes("1234")); table.delete(delete); table.flushCommits(); } /** * 单条查询 * * @throws Exception */ @Test public void queryData() throws Exception { Get get = new Get(Bytes.toBytes("1234")); Result result = table.get(get); System.out.println(Bytes.toInt(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("password")))); System.out.println(Bytes.toString(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("namessss")))); System.out.println(Bytes.toString(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("sex")))); } /** * 全表扫描 * * @throws Exception */ @Test public void scanData() throws Exception { Scan scan = new Scan(); //scan.addFamily(Bytes.toBytes("info")); //scan.addColumn(Bytes.toBytes("info"), Bytes.toBytes("password")); scan.setStartRow(Bytes.toBytes("wangsf_0")); scan.setStopRow(Bytes.toBytes("wangwu")); ResultScanner scanner = table.getScanner(scan); for (Result result : scanner) { System.out.println(Bytes.toInt(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("password")))); System.out.println(Bytes.toString(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("name")))); //System.out.println(Bytes.toInt(result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("password")))); //System.out.println(Bytes.toString(result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("name")))); } } /** * 全表扫描的过滤器 * 列值过滤器 * * @throws Exception */ @Test public void scanDataByFilter1() throws Exception { // 创建全表扫描的scan Scan scan = new Scan(); //过滤器:列值过滤器 SingleColumnValueFilter filter = new SingleColumnValueFilter(Bytes.toBytes("info"), Bytes.toBytes("name"), CompareFilter.CompareOp.EQUAL, Bytes.toBytes("zhangsan2")); // 设置过滤器 scan.setFilter(filter); // 打印结果集 ResultScanner scanner = table.getScanner(scan); for (Result result : scanner) { System.out.println(Bytes.toInt(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("password")))); System.out.println(Bytes.toString(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("name")))); //System.out.println(Bytes.toInt(result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("password")))); //System.out.println(Bytes.toString(result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("name")))); } } /** * rowkey过滤器 * @throws Exception */ @Test public void scanDataByFilter2() throws Exception { // 创建全表扫描的scan Scan scan = new Scan(); //匹配rowkey以wangsenfeng开头的 RowFilter filter = new RowFilter(CompareFilter.CompareOp.EQUAL, new RegexStringComparator("^12341")); // 设置过滤器 scan.setFilter(filter); // 打印结果集 ResultScanner scanner = table.getScanner(scan); for (Result result : scanner) { System.out.println(Bytes.toInt(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("password")))); System.out.println(Bytes.toString(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("name")))); //System.out.println(Bytes.toInt(result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("password")))); //System.out.println(Bytes.toString(result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("name")))); } } /** * 匹配列名前缀 * @throws Exception */ @Test public void scanDataByFilter3() throws Exception { // 创建全表扫描的scan Scan scan = new Scan(); //匹配rowkey以wangsenfeng开头的 ColumnPrefixFilter filter = new ColumnPrefixFilter(Bytes.toBytes("na")); // 设置过滤器 scan.setFilter(filter); // 打印结果集 ResultScanner scanner = table.getScanner(scan); for (Result result : scanner) { System.out.println("rowkey:" + Bytes.toString(result.getRow())); System.out.println("info:name:" + Bytes.toString(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("name")))); // 判断取出来的值是否为空 if (result.getValue(Bytes.toBytes("info"), Bytes.toBytes("age")) != null) { System.out.println("info:age:" + Bytes.toInt(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("age")))); } // 判断取出来的值是否为空 if (result.getValue(Bytes.toBytes("info"), Bytes.toBytes("sex")) != null) { System.out.println("infi:sex:" + Bytes.toInt(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("sex")))); } // 判断取出来的值是否为空 if (result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("name")) != null) { System.out .println("info2:name:" + Bytes.toString(result.getValue( Bytes.toBytes("info2"), Bytes.toBytes("name")))); } // 判断取出来的值是否为空 if (result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("age")) != null) { System.out.println("info2:age:" + Bytes.toInt(result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("age")))); } // 判断取出来的值是否为空 if (result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("sex")) != null) { System.out.println("info2:sex:" + Bytes.toInt(result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("sex")))); } } } /** * 过滤器集合 * @throws Exception */ @Test public void scanDataByFilter4() throws Exception { // 创建全表扫描的scan Scan scan = new Scan(); //过滤器集合:MUST_PASS_ALL(and),MUST_PASS_ONE(or) FilterList filterList = new FilterList(Operator.MUST_PASS_ONE); //匹配rowkey以wangsenfeng开头的 RowFilter filter = new RowFilter(CompareFilter.CompareOp.EQUAL, new RegexStringComparator("^wangsenfeng")); //匹配name的值等于wangsenfeng SingleColumnValueFilter filter2 = new SingleColumnValueFilter(Bytes.toBytes("info"), Bytes.toBytes("name"), CompareFilter.CompareOp.EQUAL, Bytes.toBytes("zhangsan")); filterList.addFilter(filter); filterList.addFilter(filter2); // 设置过滤器 scan.setFilter(filterList); // 打印结果集 ResultScanner scanner = table.getScanner(scan); for (Result result : scanner) { System.out.println("rowkey:" + Bytes.toString(result.getRow())); System.out.println("info:name:" + Bytes.toString(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("name")))); // 判断取出来的值是否为空 if (result.getValue(Bytes.toBytes("info"), Bytes.toBytes("age")) != null) { System.out.println("info:age:" + Bytes.toInt(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("age")))); } // 判断取出来的值是否为空 if (result.getValue(Bytes.toBytes("info"), Bytes.toBytes("sex")) != null) { System.out.println("infi:sex:" + Bytes.toInt(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("sex")))); } // 判断取出来的值是否为空 if (result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("name")) != null) { System.out .println("info2:name:" + Bytes.toString(result.getValue( Bytes.toBytes("info2"), Bytes.toBytes("name")))); } // 判断取出来的值是否为空 if (result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("age")) != null) { System.out.println("info2:age:" + Bytes.toInt(result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("age")))); } // 判断取出来的值是否为空 if (result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("sex")) != null) { System.out.println("info2:sex:" + Bytes.toInt(result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("sex")))); } } } @After public void close() throws Exception { table.close(); connection.close(); } }
javaAPI操作
五、使用hive操作hbase
参考:http://blog.csdn.net/aaronhadoop/article/details/28398157相关文章推荐
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