import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
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.TableName;
import org.apache.hadoop.hbase.client.Admin;
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;
public class HBaseDemo {
public static Configuration configuration;
static {
configuration = HBaseConfiguration.create();
// configuration.set("hbase.zookeeper.quorum", "192.168.1.21");
// configuration.set("hbase.zookeeper.property.clientPort", "2181");
}
// 判断表是否存在 true-》存在 false-》不存在
public static boolean isExist(String tableName) throws IOException {
Connection connection = ConnectionFactory.createConnection(configuration);
Admin admin = connection.getAdmin();
return admin.tableExists(TableName.valueOf(tableName));
}
// 创建表
public static void createTable(String tableName, String ...columnFamilys) throws IOException {
if (!isExist(tableName)) {
Connection connection = ConnectionFactory.createConnection(configuration);
Admin admin = connection.getAdmin();
HTableDescriptor hTableDescriptor = new HTableDescriptor(TableName.valueOf(tableName));
for (String columnFamily : columnFamilys) {
hTableDescriptor.addFamily(new HColumnDescriptor(columnFamily));
}
System.out.println("【"+tableName+"】表成功创建。。。");
admin.createTable(hTableDescriptor);
} else {
System.out.println("【"+tableName+"】表已经存在。。。");
}
return;
}
// 删除表
public static void deleteTable(String tableName) throws IOException {
if (isExist(tableName)) {
Connection connection = ConnectionFactory.createConnection(configuration);
Admin admin = connection.getAdmin();
if (admin.isTableEnabled(TableName.valueOf(tableName))) {
admin.disableTable(TableName.valueOf(tableName));
}
admin.deleteTable(TableName.valueOf(tableName));
System.out.println("【"+tableName+"】表成功删除。。。");
} else {
System.out.println("【"+tableName+"】表尚未创建。。。");
}
return;
}
// 向表中插入一行数据
public static void addRowData(String tableName, String rowKey, String columnFamily, String column, String value) throws IOException {
if (isExist(tableName)) {
Connection connection = ConnectionFactory.createConnection(configuration);
Table table = connection.getTable(TableName.valueOf(tableName));
Put put = new Put(Bytes.toBytes(rowKey));
put.addColumn(Bytes.toBytes(columnFamily), Bytes.toBytes(column), Bytes.toBytesBinary(value));
table.put(put);
table.close();
System.out.println("【"+tableName+"】表插入数据成功。。。");
} else {
System.out.println("【"+tableName+"】表尚未创建。。。");
}
return;
}
// 向表中插入多行数据
public static void addRowDatas(String tableName, String rowKey, String columnFamily, Map<String,String> kv) throws IOException {
for (Entry<String, String> entry : kv.entrySet()) {
addRowData(tableName, rowKey, columnFamily, entry.getKey(), entry.getValue());
}
return;
}
// 删除多行数据
public static void deleteRowsData(String tableName, String ...rows) throws IOException {
if (isExist(tableName)) {
Connection connection = ConnectionFactory.createConnection(configuration);
Table table = connection.getTable(TableName.valueOf(tableName));
List<Delete> delList = new ArrayList<>();
for (String row : rows) {
Delete del = new Delete(Bytes.toBytes(row));
delList.add(del);
}
table.delete(delList);
table.close();
System.out.println("【"+tableName+"】表删除数据成功。。。");
} else {
System.out.println("【"+tableName+"】表尚未创建。。。");
}
return;
}
// 得到所有数据
public static void getDataWithTable(String tableName) throws IOException {
Connection connection = ConnectionFactory.createConnection(configuration);
Table table = connection.getTable(TableName.valueOf(tableName));
Scan scan = new Scan();
ResultScanner resultScanner = table.getScanner(scan);
for (Result result : resultScanner) {
Cell[] cells = result.rawCells();
for (Cell cell : cells) {
System.out.println("---------------------------------------");
// 获取rowKey
System.out.println(Bytes.toString(CellUtil.cloneRow(cell)));
// 获取columnFamily
System.out.println(Bytes.toString(CellUtil.cloneFamily(cell)));
// 获取column
System.out.println(Bytes.toString(CellUtil.cloneQualifier(cell)));
// 获取value
System.out.println(Bytes.toString(CellUtil.cloneValue(cell)));
}
}
table.close();
return;
}
// 得到某一行所有数据
public static void getDataWithRowkey(String tableName, String rowKey) throws IOException {
Connection connection = ConnectionFactory.createConnection(configuration);
Table table = connection.getTable(TableName.valueOf(tableName));
Get get = new Get(Bytes.toBytes(rowKey));
Result result = table.get(get);
Cell[] cells = result.rawCells();
for (Cell cell : cells) {
System.out.println("---------------------------------------");
// 获取rowKey
System.out.println(Bytes.toString(CellUtil.cloneRow(cell)));
// 获取columnFamily
System.out.println(Bytes.toString(CellUtil.cloneFamily(cell)));
// 获取column
System.out.println(Bytes.toString(CellUtil.cloneQualifier(cell)));
// 获取value
System.out.println(Bytes.toString(CellUtil.cloneValue(cell)));
}
table.close();
return;
}
// 获取某一行指定“列族:列”的数据
public static void getDataWithColumn(String tableName, String rowKey, String columnFamily, String column) throws IOException {
Connection connection = ConnectionFactory.createConnection(configuration);
Table table = connection.getTable(TableName.valueOf(tableName));
Get get = new Get(Bytes.toBytes(rowKey));
get.addColumn(Bytes.toBytes(columnFamily) ,Bytes.toBytes(column));
Result result = table.get(get);
Cell[] cells = result.rawCells();
for (Cell cell : cells) {
System.out.println("---------------------------------------");
// 获取rowKey
System.out.println(Bytes.toString(CellUtil.cloneRow(cell)));
// 获取columnFamily
System.out.println(Bytes.toString(CellUtil.cloneFamily(cell)));
// 获取column
System.out.println(Bytes.toString(CellUtil.cloneQualifier(cell)));
// 获取value
System.out.println(Bytes.toString(CellUtil.cloneValue(cell)));
}
table.close();
return;
}
public static void main(String[] args) throws IOException {
System.out.println("start......");
// createTable("student", "describe", "ability");
Map<String,String> bodyinfos = new HashMap<>();
bodyinfos.put("sex", "male");
bodyinfos.put("nick", "leo");
bodyinfos.put("favor", "caoliu");
addRowDatas("student", "9527", "describe", bodyinfos);
addRowDatas("student", "9528", "describe", bodyinfos);
addRowDatas("student", "9529", "describe", bodyinfos);
// deleteRowsData("student", "9527", "9529");
// deleteTable("student");
// getDataWithTable("student");
// getDataWithRowkey("student", "9527");
getDataWithColumn("student", "9527", "describe", "nick");
System.out.println("end......");
}
}
maven 项目的依赖如下：
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-server</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-client</artifactId>
<version>1.3.1</version>
</dependency>
<!-- 下面这个依赖不是必须添加 -->
<dependency>
<groupId>jdk.tools</groupId>
<artifactId>jdk.tools</artifactId>
<version>1.6</version>
<scope>system</scope>
<systemPath>${JAVA_HOME}/lib/tools.jar</systemPath>
</dependency>还有为了让Configuration的值不用手动设置需要在/src/main/resources中加入下列文件和log输出文件
core-site.xml hbase-site.xml hdfs-site.xml log4j.properties