pom.xml
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-it</artifactId>
<version>1.2.0</version>
</dependency>源码
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.*;
import org.apache.hadoop.hbase.client.*;
import org.apache.hadoop.hbase.filter.Filter;
import org.apache.hadoop.hbase.filter.FilterList;
import org.apache.hadoop.hbase.filter.SingleColumnValueFilter;
import org.apache.hadoop.hbase.filter.CompareFilter.CompareOp;
import org.apache.hadoop.hbase.util.Bytes;
public class HBaseService {
public static Configuration configuration;
public static Connection connection;
static {
System.setProperty("hadoop.home.dir", "D:\\Program\\hadoop-common-2.6.0-bin-master");
configuration = HBaseConfiguration.create();
configuration.set("hbase.zookeeper.property.clientPort", "2181");
configuration.set("hbase.zookeeper.quorum", "192.168.91.144");
configuration.set("hbase.client.keyvalue.maxsize","500000");
try {
connection=ConnectionFactory.createConnection(configuration);
} catch (IOException e) {
e.printStackTrace();
}
//configuration.set("hbase.master", "192.168.1.100:600000");
}
public static void main(String[] args) {
createTable("tbtest");
insertData("tbtest");
QueryAll("tbtest");
QueryByCondition1("tbtest");
QueryByCondition2("tbtest");
QueryByCondition3("tbtest");
deleteRow("tbtest","rowkey123");
dropTable("tbtest");
}
public static void createTable(String tableName) {
System.out.println("start create table ......");
try {
Admin hBaseAdmin = connection.getAdmin();
if (hBaseAdmin.tableExists(TableName.valueOf(tableName))) {// 如果存在要创建的表，那么先删除，再创建
hBaseAdmin.disableTable(TableName.valueOf(tableName));
hBaseAdmin.deleteTable(TableName.valueOf(tableName));
System.out.println(tableName + " is exist,delete....");
}
HTableDescriptor tableDescriptor = new HTableDescriptor(TableName.valueOf(tableName));
tableDescriptor.addFamily(new HColumnDescriptor("column1"));
tableDescriptor.addFamily(new HColumnDescriptor("column2"));
tableDescriptor.addFamily(new HColumnDescriptor("column3"));
hBaseAdmin.createTable(tableDescriptor);
} catch (MasterNotRunningException e) {
e.printStackTrace();
} catch (ZooKeeperConnectionException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("end create table ......");
}
public static void insertData(String tableName) {
System.out.println("start insert data ......");
try {
HTable table = (HTable) connection.getTable(TableName.valueOf(tableName));
Put put = new Put("rowkey123".getBytes());// 一个PUT代表一行数据，再NEW一个PUT表示第二行数据,每行一个唯一的ROWKEY，此处rowkey为put构造方法中传入的值
put.addColumn("column1".getBytes(), null, "aaa".getBytes());// 本行数据的第一列
put.addColumn("column2".getBytes(), null, "bbb".getBytes());// 本行数据的第三列
put.addColumn("column3".getBytes(), null, "ccc".getBytes());// 本行数据的第三列
table.put(put);
} catch (IOException e) {
e.printStackTrace();
}
System.out.println("end insert data ......");
}
public static void dropTable(String tableName) {
try {
Admin admin = connection.getAdmin();;
admin.disableTable(TableName.valueOf(tableName));
admin.deleteTable(TableName.valueOf(tableName));
} catch (MasterNotRunningException e) {
e.printStackTrace();
} catch (ZooKeeperConnectionException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
public static void deleteRow(String tableName, String rowkey) {
try {
Table table = connection.getTable(TableName.valueOf(tableName));
List list = new ArrayList();
Delete d1 = new Delete(rowkey.getBytes());
list.add(d1);
table.delete(list);
System.out.println("删除行成功!");
} catch (IOException e) {
e.printStackTrace();
}
}
public static void QueryAll(String tableName) {
try {
Table table = connection.getTable(TableName.valueOf(tableName));
ResultScanner rs = table.getScanner(new Scan());
for (Result r : rs) {
System.out.println("获得到rowkey:" + new String(r.getRow()));
for (KeyValue keyValue : r.raw()) {
System.out.println("列：" + new String(keyValue.getFamily())
+ "====值:" + new String(keyValue.getValue()));
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
public static void QueryByCondition1(String tableName) {
try {
Table table = connection.getTable(TableName.valueOf(tableName));
Get scan = new Get("rowkey123".getBytes());// 根据rowkey查询
Result r = table.get(scan);
System.out.println("获得到rowkey:" + new String(r.getRow()));
for (KeyValue keyValue : r.raw()) {
System.out.println("列：" + new String(keyValue.getFamily())
+ "====值:" + new String(keyValue.getValue()));
}
} catch (IOException e) {
e.printStackTrace();
}
}
public static void QueryByCondition2(String tableName) {
try {
Table table = connection.getTable(TableName.valueOf(tableName));
Filter filter = new SingleColumnValueFilter(Bytes
.toBytes("column1"), null, CompareOp.EQUAL, Bytes
.toBytes("aaa")); // 当列column1的值为aaa时进行查询
Scan s = new Scan();
s.setFilter(filter);
ResultScanner rs = table.getScanner(s);
for (Result r : rs) {
System.out.println("获得到rowkey:" + new String(r.getRow()));
for (KeyValue keyValue : r.raw()) {
System.out.println("列：" + new String(keyValue.getFamily())
+ "====值:" + new String(keyValue.getValue()));
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
public static void QueryByCondition3(String tableName) {
try {
Table table = connection.getTable(TableName.valueOf(tableName));
List<Filter> filters = new ArrayList<Filter>();
Filter filter1 = new SingleColumnValueFilter(Bytes
.toBytes("column1"), null, CompareOp.EQUAL, Bytes
.toBytes("aaa"));
filters.add(filter1);
Filter filter2 = new SingleColumnValueFilter(Bytes
.toBytes("column2"), null, CompareOp.EQUAL, Bytes
.toBytes("bbb"));
filters.add(filter2);
Filter filter3 = new SingleColumnValueFilter(Bytes
.toBytes("column3"), null, CompareOp.EQUAL, Bytes
.toBytes("ccc"));
filters.add(filter3);
FilterList filterList1 = new FilterList(filters);
Scan scan = new Scan();
scan.setFilter(filterList1);
ResultScanner rs = table.getScanner(scan);
for (Result r : rs) {
System.out.println("获得到rowkey:" + new String(r.getRow()));
for (KeyValue keyValue : r.raw()) {
System.out.println("列：" + new String(keyValue.getFamily())
+ "====值:" + new String(keyValue.getValue()));
}
}
rs.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}异常处理
//报错
org.apache.hadoop.hbase.ipc.RemoteWithExtrasException: org.apache.hadoop.hbase.regionserver.NoSuchColumnFamilyException: Column family table does not exist in region hbase:meta,,1.1588230740 in table 'hbase:meta', {TABLE_ATTRIBUTES => {IS_META => 'true', coprocessor$1 => '|org.apache.hadoop.hbase.coprocessor.MultiRowMutationEndpoint|536870911|'}, {NAME => 'info', BLOOMFILTER => 'NONE', VERSIONS => '10', IN_MEMORY => 'true', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'NONE', TTL => 'FOREVER', COMPRESSION => 'NONE', CACHE_DATA_IN_L1 => 'true', MIN_VERSIONS => '0', BLOCKCACHE => 'true', BLOCKSIZE => '8192', REPLICATION_SCOPE => '0'}
at org.apache.hadoop.hbase.regionserver.HRegion.checkFamily(HRegion.java:7884)
由于HBase和HBase-client(2.x)版本不一致导致，查看下hbase版本
http://192.168.91.144:60010/master-status切换到Show non-RPC Tasks得到HBase Version 1.2.0
修改pom.xml中依赖版本为1.2.0
/报错：java.lang.RuntimeException: Unexpected version format: 11.0.2
java版本太高了，用11无法通过hbase的版本验证，这正则写法真心无语了，呵呵，降低到8就可以了
static {
final String version = System.getProperty("java.version");
// Verify String looks like this: 1.6.0_29
if (!version.matches("\\d\\.\\d\\..*")) {
throw new RuntimeException("Unexpected version format: " + version);
}
//java.io.IOException: Could not locate executable null\bin\winutils.exe in the Hadoop binaries.
两种处理方式
1.直接设置属性System.setProperty("hadoop.home.dir", "D:\\Program\\hadoop-common-2.6.0-bin-master");
2.设置环境变量HADOOP_HOME
下载winutils地址https://github.com/srccodes/hadoop-common-2.2.0-bin下载解压
或者新版的https://github.com/amihalik/hadoop-common-2.6.0-bin
/o.a.hadoop.hbase.client.ConnectionUtils : Can not resolve node3, please check your network
java.net.UnknownHostException: 不知道这样的主机。 (node3)
设置hosts文件，将hadoop集群各主机ip及机器名映射放进去参考文章：
