Hbase Java API 测试代码

package com.rabbit.hadoop.testEnv;

import java.io.IOException;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

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.NamespaceDescriptor;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.TableNotFoundException;
import org.apache.hadoop.hbase.ZooKeeperConnectionException;
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.HTable;
import org.apache.hadoop.hbase.client.HTableInterface;
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.util.Bytes;

public class TestHbaseApi {

/**
* Get configuration
* @return
*/
public static Configuration getconf() {
Configuration configuration = HBaseConfiguration.create();
configuration.set("hbase.zookeeper.quorum",
"bd27-server.ibeifeng.com,bd27-server2.ibeifeng.com,bd27-server3.ibeifeng.com");
return configuration;
}

/**
* Get hbase connection
* @param conf
* @return
* @throws IOException
*/
public static HConnection getConn(Configuration conf) throws IOException {
ExecutorService pool = Executors.newFixedThreadPool(10);
HConnection conn = HConnectionManager.createConnection(conf, pool);
return conn;
}

/**
* Get an table instance of a given table name, using hbase connection pool
* @param tableName
* @return
* @throws IOException
*/
public static HTableInterface getHTable(String tableName) throws IOException {
HConnection connection = getConn(getconf());
HTableInterface table = connection.getTable(tableName);
return table;
}

/**
* DDL: create table
* @param admin
* @param tName
* @param families
* @throws IOException
*/
public static void createTable(HBaseAdmin admin, TableName tName, List<HColumnDescriptor> families)
throws IOException {

if (admin.tableExists(tName)) {
try {
throw new Exception("Table already exists.");
} catch (Exception e) {
e.printStackTrace();
System.out.println("faild to create table " + "\"" + tName.toString() + "\".");
}
} else {
HTableDescriptor tableDescriptor = new HTableDescriptor(tName);

for (HColumnDescriptor family : families) {
tableDescriptor.addFamily(family);
}

tableDescriptor.setMaxFileSize(10000L);
admin.createTable(tableDescriptor);
System.out.println(tName.toString() + "表创建成功");
}

}

/**
* Get descriptions of a table
* @param admin
* @param tableName
* @throws TableNotFoundException
* @throws IOException
*/
public static void getTableDescription(HBaseAdmin admin, String tableName)
throws TableNotFoundException, IOException {
if (admin.tableExists(tableName)) {
TableName tName = TableName.valueOf(tableName);
HTableDescriptor descriptor = admin.getTableDescriptor(tName);
System.out.println(descriptor);
} else {
System.out.println("table descriptor: table does not exits.");
}

}

/**
* DDL: delete a table with parameter type : TableName
* @param admin
* @param tName
* @throws IOException
*/
public static void deleteTable(HBaseAdmin admin, TableName tName) throws IOException {
if (admin.tableExists(tName)) {
if (!admin.isTableDisabled(tName)) {
admin.disableTable(tName);
}
admin.deleteTable(tName);
System.out.println("deleted table successfully.");
} else {
System.out.println("table deleting: table does not exits.");
}

}

/**
* DDL: overwrite : delete a table with parameter table name type : String
* @param admin
* @param tableName
* @throws IOException
*/
public static void deleteTable(HBaseAdmin admin, String tableName) throws IOException {
TableName tName = TableName.valueOf(tableName);
deleteTable(admin, tName);
}

/**
* Insert records into a table
* @param conf
* @param tableName
* @param rowKey
* @param familyName
* @param column
* @param value
* @throws IOException
*/
public static void putData(Configuration conf, String tableName, String rowKey, String familyName, String column,
String value) throws IOException {
HTable table = new HTable(conf, tableName);
try {
Put put = new Put(Bytes.toBytes(rowKey));
put.add(familyName.getBytes(), column.getBytes(), value.getBytes());
table.put(put);
} finally {
table.close();
}

}

/**
* Query records from a table
* @param conf
* @param tableName
* @param rowKey
* @throws IOException
*/
public static void getData(Configuration conf, String tableName, String rowKey) throws IOException {
HTable table = new HTable(conf, tableName);
Get get = new Get(rowKey.getBytes());
Result result = table.get(get);
for (Cell cell : result.rawCells()) {
System.out.println("family: " + Bytes.toString(CellUtil.cloneFamily(cell)) + " --> " + "column: "
+ Bytes.toString(CellUtil.cloneQualifier(cell)) + " --> " + "value: "
+ Bytes.toString(CellUtil.cloneValue(cell)));
}

table.close();
}

/**
* Delete records from a table, using rowkey
* @param conf
* @param tableName
* @param rowKey
* @throws IOException
*/
public static void deleteData(Configuration conf, String tableName, String rowKey) throws IOException {
deleteData(conf, tableName, rowKey, null);
}

/**
* Delete records from a table, using rowkey and family
* @param conf
* @param tableName
* @param rowKey
* @param family
* @throws IOException
*/
public static void deleteData(Configuration conf, String tableName, String rowKey, String family)
throws IOException {
deleteData(conf, tableName, rowKey, family, null);
}

/**
* Delete records from a table, using rowkey,family and column name
* @param conf
* @param tableName
* @param rowKey
* @param family
* @param column
* @throws IOException
*/
public static void deleteData(Configuration conf, String tableName, String rowKey, String family, String column)
throws IOException {
HTable table = new HTable(conf, tableName);
Delete delete = new Delete(rowKey.getBytes());
if (family != null && column != null) {
delete.deleteColumn(family.getBytes(), column.getBytes());
} else if (family != null) {
delete.deleteFamily(family.getBytes());
}
table.delete(delete);
System.out.println("delete records successfully.");
table.close();
}

/**
* Scan table for records match given startrow and stoprow
* @param tableName
* @param startRow
* @param stopRow
* @throws IOException
*/
public static void scanData(String tableName, String startRow, String stopRow)
throws IOException {
HTable table = (HTable)getHTable(tableName);
Scan scan = new Scan();
if (startRow != null) {
scan.setStartRow(startRow.getBytes());
}

if (stopRow != null) {
scan.setStopRow(stopRow.getBytes());
}

ResultScanner resultScanner = table.getScanner(scan);

for (Result result : resultScanner) {
System.out
.println("::::::::::::::::::::::::" + Bytes.toString(result.getRow()) + "::::::::::::::::::::::::");
for (Cell cell : result.rawCells()) {
System.out.println(Bytes.toString(CellUtil.cloneFamily(cell)) + "-->"
+ Bytes.toString(CellUtil.cloneQualifier(cell)) + "-->"
+ Bytes.toString(CellUtil.cloneValue(cell)));
}
}

table.close();
}

/**
* Scan a table for all records
* @param tableName
* @throws IOException
*/
public static void scanData(String tableName) throws IOException {
scanData(tableName, null, null);
}

/**
* main method
* @param args
* @throws MasterNotRunningException
* @throws ZooKeeperConnectionException
* @throws IOException
*/
public static void main(String[] args) throws MasterNotRunningException, ZooKeeperConnectionException, IOException {

Configuration configuration = getconf();

HBaseAdmin admin = new HBaseAdmin(configuration);// --------> DDL & DML operations

// admin.createNamespace(NamespaceDescriptor.create("ns2").build());

String tableName = "users2";
// TableName tName = TableName.valueOf(tableName);
// List<HColumnDescriptor> familyList = new ArrayList<HColumnDescriptor>();
//
// HColumnDescriptor f1 = new HColumnDescriptor("f1");
// HColumnDescriptor f2 = new HColumnDescriptor("f2");
// HColumnDescriptor f3 = new HColumnDescriptor("f3");
//
// familyList.add(f1);
// familyList.add(f2);
// familyList.add(f3);

try {
// createTable(admin, tName,familyList);
// getTableDescription(admin, tableName);
// deleteTable(admin, tableName);
putData(configuration, tableName, "10001", "f1", "name", "user01");
putData(configuration, tableName, "10001", "f1", "age", "20");
putData(configuration, tableName, "10001", "f1", "gender", "male");
putData(configuration, tableName, "10002", "f2", "address", "shanghai");
putData(configuration, tableName, "10002", "f2", "qq", "10086");
putData(configuration, tableName, "10002", "f1", "name", "user02");
putData(configuration, tableName, "10002", "f1", "age", "22");
putData(configuration, tableName, "10003", "f1", "name", "user03");
putData(configuration, tableName, "10003", "f1", "age", "23");
putData(configuration, tableName, "10003", "f1", "gender", "female");
putData(configuration, tableName, "10003", "f2", "address", "beijing");
putData(configuration, tableName, "10003", "f2", "qq", "95533");
putData(configuration, tableName, "10005", "f1", "name", "user05");
putData(configuration, tableName, "10004", "f1", "name", "user04");
putData(configuration, tableName, "10004", "f1", "age", "24");
putData(configuration, tableName, "10004", "f1", "gender", "female");
//
// getData(configuration, tableName, "10003");
// System.out.println("***************************************");
// getData(configuration, tableName, "10004");
// System.out.println("***************************************");
// deleteData(configuration, tableName, "10003", "f1");
// deleteData(configuration, tableName, "10004", "f1", "age");
scanData(tableName);
System.out.println("==============================================================");
scanData(tableName, "10002", "10004");
} finally {
if (admin != null) {
admin.close();
}

}
}
}

原文：https://www.cnblogs.com/rabbit624/p/10556622.html