声明
正文
添加依赖
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-client</artifactId>
<version>2.0.5</version>
</dependency>
工具类
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);
}
}
}
测试类
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();
}
}
}