https://www.cnblogs.com/jonban/p/hbase-client.html
依赖jar
<dependency> <groupId>org.apache.hbase</groupId> <artifactId>hbase-client</artifactId> <version>2.0.5</version> </dependency>
HbaseUtils.java
package javax.utils; import java.io.IOException; import java.util.ArrayList; import java.util.List; import org.apache.hadoop.hbase.Cell; import org.apache.hadoop.hbase.TableName; 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.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.util.Bytes; /** * Hbase 操作工具类 * * @author Logan * @version 1.0.0 * @createDate 2019-05-03 * */ public class HbaseUtils { // ===============Common===================================== /** * 根据表名获取Table对象 * * @param name 表名,必要时可指定命名空间,比如:“default:user” * @return Hbase Table 对象 * @throws IOException 有异常抛出,由调用者捕获处理 */ public static Table getTable(String name) throws IOException { TableName tableName = TableName.valueOf(name); Connection connection = ConnectionFactory.createConnection(); return connection.getTable(tableName); } // =============== Put ===================================== /** * 根据rowKey生成一个Put对象 * * @param rowKey rowKey * @return Put对象 */ public static Put createPut(String rowKey) { return new Put(Bytes.toBytes(rowKey)); } /** * 在Put对象上增加Cell * * @param put Put对象 * @param cell cell对象 * @throws IOException 有异常抛出,由调用者捕获处理 */ public static void addCellOnPut(Put put, Cell cell) throws IOException { put.add(cell); } /** * 在Put对象上增加值 * * @param put Put对象 * @param family 列簇 * @param qualifier 列 * @param value 字符串类型的值 */ public static void addValueOnPut(Put put, String family, String qualifier, String value) { addValueOnPut(put, family, qualifier, Bytes.toBytes(value)); } /** * 在Put对象上增加值 * * @param put Put对象 * @param family 列簇 * @param qualifier 列 * @param value 字节数组类型的值,可以是任意对象序列化而成 */ public static void addValueOnPut(Put put, String family, String qualifier, byte[] value) { put.addColumn(Bytes.toBytes(family), Bytes.toBytes(qualifier), value); } /** * 在Put对象上增加值 * * @param put Put对象 * @param family 列簇 * @param qualifier 列 * @param ts Timestamp时间戳 * @param value 字符串类型的值 */ public static void addValueOnPut(Put put, String family, String qualifier, long ts, String value) { addValueOnPut(put, family, qualifier, ts, Bytes.toBytes(value)); } /** * 在Put对象上增加值 * * @param put Put对象 * @param family 列簇 * @param qualifier 列 * @param ts Timestamp时间戳 * @param value 字节数组类型的值,可以是任意对象序列化而成 */ public static void addValueOnPut(Put put, String family, String qualifier, long ts, byte[] value) { put.addColumn(Bytes.toBytes(family), Bytes.toBytes(qualifier), ts, value); } /** * 按表名插入一个Put对象包含的数据 * * @param tableName 表名,必要时可指定命名空间,比如:“default:user” * @param put 要插入的数据对象 * @throws IOException 有异常抛出,由调用者捕获处理 */ public static void put(String tableName, Put put) throws IOException { try ( Table table = getTable(tableName); ) { table.put(put); } } /** * 按表名批量插入Put对象包含的数据 * * @param tableName 表名,必要时可指定命名空间,比如:“default:user” * @param puts 要插入的数据对象集合 * @throws IOException 有异常抛出,由调用者捕获处理 */ public static void put(String tableName, List<Put> puts) throws IOException { try ( Table table = getTable(tableName); ) { table.put(puts); } } // =============== Get ===================================== /** * 根据rowKey生成一个查询的Get对象 * * @param rowKey rowKey * @return Get 对象 */ public static Get createGet(String rowKey) { return new Get(Bytes.toBytes(rowKey)); } /** * 对查询的Get对象增加指定列簇 * * @param get * @param family */ public static void addFamilyOnGet(Get get, String family) { get.addFamily(Bytes.toBytes(family)); } /** * 对查询的Get对象增加指定列簇和列 * * @param get * @param family * @param qualifier */ public static void addColumnOnGet(Get get, String family, String qualifier) { get.addColumn(Bytes.toBytes(family), Bytes.toBytes(qualifier)); } /** * 根据表名和rowKey查询结果(包含全部列簇和列) * * @param tableName 表名,必要时可指定命名空间,比如:“default:user” * @param rowKey 查询rowKey * @return 查询结果Result * @throws IOException 有异常抛出,由调用者捕获处理 */ public static Result get(String tableName, String rowKey) throws IOException { Get get = createGet(rowKey); return get(tableName, get); } /** * 根据表名和rowKey数组批量查询结果(包含全部列簇和列) * * @param tableName 表名,必要时可指定命名空间,比如:“default:user” * @param rowKeys 查询rowKey数组 * @return 查询结果Result数组 * @throws IOException 有异常抛出,由调用者捕获处理 */ public static Result[] get(String tableName, String[] rowKeys) throws IOException { List<Get> gets = new ArrayList<Get>(); for (String rowKey : rowKeys) { gets.add(createGet(rowKey)); } return get(tableName, gets); } /** * 根据表名和Get对象查询结果 * * @param tableName 表名,必要时可指定命名空间,比如:“default:user” * @param get Hbase查询对象 * @return 查询结果Result * @throws IOException 有异常抛出,由调用者捕获处理 */ public static Result get(String tableName, Get get) throws IOException { try ( Table table = getTable(tableName); ) { return table.get(get); } } /** * 根据表名和Get对象数组查询结果 * * @param tableName 表名,必要时可指定命名空间,比如:“default:user” * @param gets 多个Hbase查询对象组成的数组 * @return 查询结果Result数组 * @throws IOException 有异常抛出,由调用者捕获处理 */ public static Result[] get(String tableName, List<Get> gets) throws IOException { try ( Table table = getTable(tableName); ) { return table.get(gets); } } // =============== Scan ===================================== /** * 根据startRow和stopRow创建扫描对象 * * @param startRow 扫描开始行,结果包含该行 * @param stopRow 扫描结束行,结果不包含该行 * @return Scan对象 */ public static Scan createScan(String startRow, String stopRow) { Scan scan = new Scan(); scan.withStartRow(Bytes.toBytes(startRow)); scan.withStopRow(Bytes.toBytes(stopRow)); return scan; } /** * 对扫描对象设置列簇 * * @param scan 扫描对象 * @param family 列簇 */ public static void addFamilyOnScan(Scan scan, String family) { scan.addFamily(Bytes.toBytes(family)); } /** * 对扫描对象设置列 * * @param scan 扫描对象 * @param family 列簇 * @param qualifier 列簇下对应的列 */ public static void addColumnOnScan(Scan scan, String family, String qualifier) { scan.addColumn(Bytes.toBytes(family), Bytes.toBytes(qualifier)); } /** * 根据表名和扫描对象扫描数据 * * @param tableName 表名,必要时可指定命名空间,比如:“default:user” * @param scan 扫描对象 * @return 扫描结果集对象ResultScanner * @throws IOException 有异常抛出,由调用者捕获处理 */ public static ResultScanner scan(String tableName, Scan scan) throws IOException { try ( Table table = getTable(tableName); ) { return table.getScanner(scan); } } /** * 根据表名、开始行和结束行扫描数据(结果包含开始行,不包含结束行,半开半闭区间[startRow, stopRow)) * * @param tableName 表名,必要时可指定命名空间,比如:“default:user” * @param startRow 扫描开始行 * @param stopRow 扫描结束行 * @return 扫描结果集对象ResultScanner * @throws IOException 有异常抛出,由调用者捕获处理 */ public static ResultScanner scan(String tableName, String startRow, String stopRow) throws IOException { return scan(tableName, createScan(startRow, stopRow)); } // =============== Delete ===================================== /** * 根据rowKey生成一个查询的Delete对象 * * @param rowKey rowKey * @return Delete对象 */ public static Delete createDelete(String rowKey) { return new Delete(Bytes.toBytes(rowKey)); } /** * 在Delete对象上增加Cell * * @param delete Delete对象 * @param cell cell对象 * @throws IOException 有异常抛出,由调用者捕获处理 */ public static void addCellOnDelete(Delete delete, Cell cell) throws IOException { delete.add(cell); } /** * 对删除对象增加指定列簇 * * @param delete Delete对象 * @param family 列簇 */ public static void addFamilyOnDelete(Delete delete, String family) { delete.addFamily(Bytes.toBytes(family)); } /** * 对删除对象增加指定列簇和列 * * @param delete Delete对象 * @param family 列簇 * @param qualifier 列 */ public static void addColumnOnDelete(Delete delete, String family, String qualifier) { delete.addColumn(Bytes.toBytes(family), Bytes.toBytes(qualifier)); } /** * 按表名删除一个Delete对象指定的数据 * * @param tableName 表名,必要时可指定命名空间,比如:“default:user” * @param delete Delete对象 * @throws IOException 有异常抛出,由调用者捕获处理 */ public static void delete(String tableName, Delete delete) throws IOException { try ( Table table = getTable(tableName); ) { table.delete(delete); } } /** * 按表名批量删除Delete对象集合包含的指定数据 * * @param tableName 表名,必要时可指定命名空间,比如:“default:user” * @param deletes Delete对象集合 * @throws IOException 有异常抛出,由调用者捕获处理 */ public static void delete(String tableName, List<Delete> deletes) throws IOException { try ( Table table = getTable(tableName); ) { table.delete(deletes); } } }
以下是测试类
HbaseClientDemo.java
package com.java.demo; import java.util.ArrayList; import java.util.List; import javax.utils.HbaseUtils; import org.apache.hadoop.hbase.Cell; import org.apache.hadoop.hbase.CellUtil; import org.apache.hadoop.hbase.client.Delete; import org.apache.hadoop.hbase.client.Get; 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.util.Bytes; import org.junit.Test; /** * Hbase 客户端测试 * * @author Logan * @version 1.0.0 * @createDate 2019-05-03 * */ public class HbaseClientDemo { /** * 向user表中插入数据 */ @Test public void put() { String tableName = "default:user"; try { List<Put> puts = new ArrayList<Put>(); Put put = HbaseUtils.createPut("key1005"); HbaseUtils.addValueOnPut(put, "info", "name", "孙悟空"); HbaseUtils.addValueOnPut(put, "info", "age", "500"); HbaseUtils.addValueOnPut(put, "info", "address", "花果山"); // HbaseUtils.put(tableName, put); puts.add(put); put = HbaseUtils.createPut("key1006"); HbaseUtils.addValueOnPut(put, "info", "name", "沙悟净"); HbaseUtils.addValueOnPut(put, "info", "age", "1000"); HbaseUtils.addValueOnPut(put, "info", "address", "流沙河"); puts.add(put); HbaseUtils.put(tableName, puts); } catch (Exception e) { e.printStackTrace(); } } /** * 按rowKey批量查询user表中全部列簇全部列的值 */ @Test public void getAllFamily() { try { String tableName = "default:user"; String[] rowKeys = { "key1001", "key1002", "key1003", "key1005", "key1006" }; // 按表名和rowKey查询所有列 Result[] results = HbaseUtils.get(tableName, rowKeys); for (Result result : results) { // 打印查询结果 printResult(result); } } catch (Exception e) { e.printStackTrace(); } } /** * 按rowKey查询user表中指定列簇指定列的值 */ @Test public void get() { try { String tableName = "default:user"; String rowKey = "key1002"; Get get = HbaseUtils.createGet(rowKey); HbaseUtils.addColumnOnGet(get, "info", "name"); HbaseUtils.addColumnOnGet(get, "info", "age"); // 不存在的列,查询结果不显示 HbaseUtils.addColumnOnGet(get, "info", "address"); // 如果在增加列后增加已有的列簇,会返回该列簇的全部列数据,覆盖前边的增加列 // HbaseUtils.addFamilyOnGet(get, "info"); Result result = HbaseUtils.get(tableName, get); printResult(result); } catch (Exception e) { e.printStackTrace(); } } @Test public void scan() { try { String tableName = "default:user"; String startRow = "key1001"; String stopRow = "key1006"; ResultScanner resultScanner = HbaseUtils.scan(tableName, startRow, stopRow); for (Result result : resultScanner) { printResult(result); } } catch (Exception e) { e.printStackTrace(); } } /** * 打印查询结果 * * @param result 查询结果对象 */ private void printResult(Result result) { Cell[] cells = result.rawCells(); // 从Result中读取 rowKey System.out.println(Bytes.toString(result.getRow())); String print = "%s %s:%s %s"; for (Cell cell : cells) { // 从Cell中取rowKey String row = Bytes.toString(CellUtil.cloneRow(cell)); String family = Bytes.toString(CellUtil.cloneFamily(cell)); String qualifier = Bytes.toString(CellUtil.cloneQualifier(cell)); String value = Bytes.toString(CellUtil.cloneValue(cell)); System.out.println(String.format(print, row, family, qualifier, value)); } } /** * 删除指定列 */ @Test public void deleteColumn() { try { String tableName = "default:user"; List<Delete> deletes = new ArrayList<Delete>(); Delete delete = HbaseUtils.createDelete("key1005"); HbaseUtils.addColumnOnDelete(delete, "info", "age"); HbaseUtils.addColumnOnDelete(delete, "info", "address"); // HbaseUtils.delete(tableName, delete); deletes.add(delete); delete = HbaseUtils.createDelete("key1006"); HbaseUtils.addColumnOnDelete(delete, "info", "address"); deletes.add(delete); HbaseUtils.delete(tableName, deletes); } catch (Exception e) { e.printStackTrace(); } } /** * 删除指定列簇 */ @Test public void deleteFamily() { try { String tableName = "default:user"; List<Delete> deletes = new ArrayList<Delete>(); Delete delete = HbaseUtils.createDelete("key1005"); HbaseUtils.addFamilyOnDelete(delete, "info"); // HbaseUtils.delete(tableName, delete); deletes.add(delete); delete = HbaseUtils.createDelete("key1006"); HbaseUtils.addFamilyOnDelete(delete, "info"); deletes.add(delete); HbaseUtils.delete(tableName, deletes); } catch (Exception e) { e.printStackTrace(); } } }