Hbase 基本操作

 

import java.util.ArrayList;

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.TableName;
import org.apache.hadoop.hbase.ZooKeeperConnectionException;
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.HBaseAdmin;
import org.apache.hadoop.hbase.client.HConnection;
import org.apache.hadoop.hbase.client.HConnectionManager;
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.filter.ColumnPrefixFilter;
import org.apache.hadoop.hbase.filter.CompareFilter;
import org.apache.hadoop.hbase.filter.FilterList;
import org.apache.hadoop.hbase.filter.FilterList.Operator;
import org.apache.hadoop.hbase.filter.RegexStringComparator;
import org.apache.hadoop.hbase.filter.RowFilter;
import org.apache.hadoop.hbase.filter.SingleColumnValueFilter;
import org.apache.hadoop.hbase.util.Bytes;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class HbaseTest {

/**
* 配置ss
*/
static Configuration config = null;
private Connection connection = null;
private Table table = null;

@Before
public void init() throws Exception {
config = HBaseConfiguration.create();// 配置
config.set("hbase.zookeeper.quorum", "192.168.1.100");// zookeeper地址
config.set("hbase.zookeeper.property.clientPort", "2181");// zookeeper端口
connection = ConnectionFactory.createConnection(config);
table = connection.getTable(TableName.valueOf("user"));
}

/**
* 创建一个表
*
* @throws Exception
*/
@Test
public void createTable() throws Exception {
// 创建表管理类
HBaseAdmin admin = new HBaseAdmin(config); // hbase表管理
// 创建表描述类
TableName tableName = TableName.valueOf("test3"); // 表名称
HTableDescriptor desc = new HTableDescriptor(tableName);
// 创建列族的描述类
HColumnDescriptor family = new HColumnDescriptor("info"); // 列族
// 将列族添加到表中
desc.addFamily(family);
HColumnDescriptor family2 = new HColumnDescriptor("info2"); // 列族
// 将列族添加到表中
desc.addFamily(family2);
// 创建表
admin.createTable(desc); // 创建表
}

@Test
@SuppressWarnings("deprecation")
public void deleteTable() throws MasterNotRunningException,
ZooKeeperConnectionException, Exception {
HBaseAdmin admin = new HBaseAdmin(config);
admin.disableTable("test3");
admin.deleteTable("test3");
admin.close();
}

/**
* 向hbase中增加数据
*
* @throws Exception
*/
@SuppressWarnings({ "deprecation", "resource" })
@Test
public void insertData() throws Exception {
table.setAutoFlushTo(false);
table.setWriteBufferSize(534534534);
ArrayList<Put> arrayList = new ArrayList<Put>();
for (int i = 21; i < 50; i++) {
Put put = new Put(Bytes.toBytes("1234"+i));
put.add(Bytes.toBytes("info"), Bytes.toBytes("name"), Bytes.toBytes("wangwu"+i));
put.add(Bytes.toBytes("info"), Bytes.toBytes("password"), Bytes.toBytes(1234+i));
arrayList.add(put);
}

//插入数据
table.put(arrayList);
//提交
table.flushCommits();
}

/**
* 修改数据
*
* @throws Exception
*/
@Test
public void uodateData() throws Exception {
Put put = new Put(Bytes.toBytes("1234"));
put.add(Bytes.toBytes("info"), Bytes.toBytes("namessss"), Bytes.toBytes("lisi1234"));
put.add(Bytes.toBytes("info"), Bytes.toBytes("password"), Bytes.toBytes(1234));
//插入数据
table.put(put);
//提交
table.flushCommits();
}

/**
* 删除数据
*
* @throws Exception
*/
@Test
public void deleteDate() throws Exception {
Delete delete = new Delete(Bytes.toBytes("1234"));
table.delete(delete);
table.flushCommits();
}

/**
* 单条查询
*
* @throws Exception
*/
@Test
public void queryData() throws Exception {
Get get = new Get(Bytes.toBytes("1234"));
Result result = table.get(get);
System.out.println(Bytes.toInt(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("password"))));
System.out.println(Bytes.toString(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("namessss"))));
System.out.println(Bytes.toString(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("sex"))));
}

/**
* 全表扫描
*
* @throws Exception
*/
@Test
public void scanData() throws Exception {
Scan scan = new Scan();
//scan.addFamily(Bytes.toBytes("info"));
//scan.addColumn(Bytes.toBytes("info"), Bytes.toBytes("password"));
scan.setStartRow(Bytes.toBytes("wangsf_0"));
scan.setStopRow(Bytes.toBytes("wangwu"));
ResultScanner scanner = table.getScanner(scan);
for (Result result : scanner) {
System.out.println(Bytes.toInt(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("password"))));
System.out.println(Bytes.toString(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("name"))));
//System.out.println(Bytes.toInt(result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("password"))));
//System.out.println(Bytes.toString(result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("name"))));
}
}

/**
* 全表扫描的过滤器
* 列值过滤器
*
* @throws Exception
*/
@Test
public void scanDataByFilter1() throws Exception {

// 创建全表扫描的scan
Scan scan = new Scan();
//过滤器:列值过滤器
SingleColumnValueFilter filter = new SingleColumnValueFilter(Bytes.toBytes("info"),
Bytes.toBytes("name"), CompareFilter.CompareOp.EQUAL,
Bytes.toBytes("zhangsan2"));
// 设置过滤器
scan.setFilter(filter);

// 打印结果集
ResultScanner scanner = table.getScanner(scan);
for (Result result : scanner) {
System.out.println(Bytes.toInt(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("password"))));
System.out.println(Bytes.toString(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("name"))));
//System.out.println(Bytes.toInt(result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("password"))));
//System.out.println(Bytes.toString(result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("name"))));
}

}
/**
* rowkey过滤器
* @throws Exception
*/
@Test
public void scanDataByFilter2() throws Exception {

// 创建全表扫描的scan
Scan scan = new Scan();
//匹配rowkey以wangsenfeng开头的
RowFilter filter = new RowFilter(CompareFilter.CompareOp.EQUAL, new RegexStringComparator("^12341"));
// 设置过滤器
scan.setFilter(filter);
// 打印结果集
ResultScanner scanner = table.getScanner(scan);
for (Result result : scanner) {
System.out.println(Bytes.toInt(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("password"))));
System.out.println(Bytes.toString(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("name"))));
//System.out.println(Bytes.toInt(result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("password"))));
//System.out.println(Bytes.toString(result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("name"))));
}


}

/**
* 匹配列名前缀
* @throws Exception
*/
@Test
public void scanDataByFilter3() throws Exception {

// 创建全表扫描的scan
Scan scan = new Scan();
//匹配rowkey以wangsenfeng开头的
ColumnPrefixFilter filter = new ColumnPrefixFilter(Bytes.toBytes("na"));
// 设置过滤器
scan.setFilter(filter);
// 打印结果集
ResultScanner scanner = table.getScanner(scan);
for (Result result : scanner) {
System.out.println("rowkey:" + Bytes.toString(result.getRow()));
System.out.println("info:name:"
+ Bytes.toString(result.getValue(Bytes.toBytes("info"),
Bytes.toBytes("name"))));
// 判断取出来的值是否为空
if (result.getValue(Bytes.toBytes("info"), Bytes.toBytes("age")) != null) {
System.out.println("info:age:"
+ Bytes.toInt(result.getValue(Bytes.toBytes("info"),
Bytes.toBytes("age"))));
}
// 判断取出来的值是否为空
if (result.getValue(Bytes.toBytes("info"), Bytes.toBytes("sex")) != null) {
System.out.println("infi:sex:"
+ Bytes.toInt(result.getValue(Bytes.toBytes("info"),
Bytes.toBytes("sex"))));
}
// 判断取出来的值是否为空
if (result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("name")) != null) {
System.out
.println("info2:name:"
+ Bytes.toString(result.getValue(
Bytes.toBytes("info2"),
Bytes.toBytes("name"))));
}
// 判断取出来的值是否为空
if (result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("age")) != null) {
System.out.println("info2:age:"
+ Bytes.toInt(result.getValue(Bytes.toBytes("info2"),
Bytes.toBytes("age"))));
}
// 判断取出来的值是否为空
if (result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("sex")) != null) {
System.out.println("info2:sex:"
+ Bytes.toInt(result.getValue(Bytes.toBytes("info2"),
Bytes.toBytes("sex"))));
}
}

}
/**
* 过滤器集合
* @throws Exception
*/
@Test
public void scanDataByFilter4() throws Exception {

// 创建全表扫描的scan
Scan scan = new Scan();
//过滤器集合:MUST_PASS_ALL(and),MUST_PASS_ONE(or)
FilterList filterList = new FilterList(Operator.MUST_PASS_ONE);
//匹配rowkey以wangsenfeng开头的
RowFilter filter = new RowFilter(CompareFilter.CompareOp.EQUAL, new RegexStringComparator("^wangsenfeng"));
//匹配name的值等于wangsenfeng
SingleColumnValueFilter filter2 = new SingleColumnValueFilter(Bytes.toBytes("info"),
Bytes.toBytes("name"), CompareFilter.CompareOp.EQUAL,
Bytes.toBytes("zhangsan"));
filterList.addFilter(filter);
filterList.addFilter(filter2);
// 设置过滤器
scan.setFilter(filterList);
// 打印结果集
ResultScanner scanner = table.getScanner(scan);
for (Result result : scanner) {
System.out.println("rowkey:" + Bytes.toString(result.getRow()));
System.out.println("info:name:"
+ Bytes.toString(result.getValue(Bytes.toBytes("info"),
Bytes.toBytes("name"))));
// 判断取出来的值是否为空
if (result.getValue(Bytes.toBytes("info"), Bytes.toBytes("age")) != null) {
System.out.println("info:age:"
+ Bytes.toInt(result.getValue(Bytes.toBytes("info"),
Bytes.toBytes("age"))));
}
// 判断取出来的值是否为空
if (result.getValue(Bytes.toBytes("info"), Bytes.toBytes("sex")) != null) {
System.out.println("infi:sex:"
+ Bytes.toInt(result.getValue(Bytes.toBytes("info"),
Bytes.toBytes("sex"))));
}
// 判断取出来的值是否为空
if (result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("name")) != null) {
System.out
.println("info2:name:"
+ Bytes.toString(result.getValue(
Bytes.toBytes("info2"),
Bytes.toBytes("name"))));
}
// 判断取出来的值是否为空
if (result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("age")) != null) {
System.out.println("info2:age:"
+ Bytes.toInt(result.getValue(Bytes.toBytes("info2"),
Bytes.toBytes("age"))));
}
// 判断取出来的值是否为空
if (result.getValue(Bytes.toBytes("info2"), Bytes.toBytes("sex")) != null) {
System.out.println("info2:sex:"
+ Bytes.toInt(result.getValue(Bytes.toBytes("info2"),
Bytes.toBytes("sex"))));
}
}

}

@After
public void close() throws Exception {
table.close();
connection.close();
}

}

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转载自www.cnblogs.com/aibabel/p/10884639.html
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