您好，登录后才能下订单哦！
密码登录
登录注册
点击 登录注册 即表示同意《亿速云用户服务条款》
这篇文章将为大家详细讲解有关hbase 2.0.2 java api怎么用，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。
package com.hbase.test;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CompareOperator;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.ColumnFamilyDescriptor;
import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
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.client.TableDescriptor;
import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
import org.apache.hadoop.hbase.filter.ColumnPrefixFilter;
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 {
Configuration conf = null;
Connection conn = null;
@Before
public void getConfigAndConnection() {
conf = HBaseConfiguration.create();
conf.set("hbase.zookeeper.quorum", "bigdata01,bigdata02,bigdata03");
conf.set("hbase.zookeeper.property.clientPort", "2181");
try {
conn = ConnectionFactory.createConnection(conf);
} catch (IOException e) {
e.printStackTrace();
}
}
@Test
public void createTable() throws IOException {
Admin admin = conn.getAdmin();
if(!admin.isTableAvailable(TableName.valueOf("test"))) {
TableName tableName = TableName.valueOf("test");
//表描述器构造器
TableDescriptorBuilder tdb =TableDescriptorBuilder.newBuilder(tableName) ;
//列族描述起构造器
ColumnFamilyDescriptorBuilder cdb = ColumnFamilyDescriptorBuilder.newBuilder(Bytes.toBytes("user"));
//获得列描述起
ColumnFamilyDescriptor cfd = cdb.build();
//添加列族
tdb.setColumnFamily(cfd);
//获得表描述器
TableDescriptor td = tdb.build();
//创建表
//admin.addColumnFamily(tableName, cfd); //给标添加列族
admin.createTable(td);
}
//关闭链接
}
//单条插入
@Test
public void insertOneData() throws IOException {
//new 一个列 ，hgs_000为row key
Put put = new Put(Bytes.toBytes("hgs_000"));
//下面三个分别为，列族，列名，列值
put.addColumn(Bytes.toBytes("testfm"),Bytes.toBytes("name") , Bytes.toBytes("hgs"));
TableName tableName = TableName.valueOf("test");
//得到 table
Table table = conn.getTable(tableName);
//执行插入
table.put(put);
}
//插入多个列
@Test
public void insertManyData() throws IOException {
Table table = conn.getTable(TableName.valueOf("test"));
List<Put> puts = new ArrayList<Put>();
Put put1 = new Put(Bytes.toBytes("hgs_001"));
put1.addColumn(Bytes.toBytes("testfm"),Bytes.toBytes("name") , Bytes.toBytes("wd"));
Put put2 = new Put(Bytes.toBytes("hgs_001"));
put2.addColumn(Bytes.toBytes("testfm"),Bytes.toBytes("age") , Bytes.toBytes("25"));
Put put3 = new Put(Bytes.toBytes("hgs_001"));
put3.addColumn(Bytes.toBytes("testfm"),Bytes.toBytes("weight") , Bytes.toBytes("60kg"));
Put put4 = new Put(Bytes.toBytes("hgs_001"));
put4.addColumn(Bytes.toBytes("testfm"),Bytes.toBytes("sex") , Bytes.toBytes("男"));
puts.add(put1);
puts.add(put2);
puts.add(put3);
puts.add(put4);
table.put(puts);
table.close();
}
//同一条数据的插入
@Test
public void singleRowInsert() throws IOException {
Table table = conn.getTable(TableName.valueOf("test"));
Put put1 = new Put(Bytes.toBytes("hgs_005"));
put1.addColumn(Bytes.toBytes("testfm"),Bytes.toBytes("name") , Bytes.toBytes("cm"));
put1.addColumn(Bytes.toBytes("testfm"),Bytes.toBytes("age") , Bytes.toBytes("22"));
put1.addColumn(Bytes.toBytes("testfm"),Bytes.toBytes("weight") , Bytes.toBytes("88kg"));
put1.addColumn(Bytes.toBytes("testfm"),Bytes.toBytes("sex") , Bytes.toBytes("男"));
table.put(put1);
table.close();
}
//数据的更新,hbase对数据只有追加，没有更新，但是查询的时候会把最新的数据返回给哦我们
@Test
public void updateData() throws IOException {
Table table = conn.getTable(TableName.valueOf("test"));
Put put1 = new Put(Bytes.toBytes("hgs_002"));
put1.addColumn(Bytes.toBytes("testfm"),Bytes.toBytes("weight") , Bytes.toBytes("63kg"));
table.put(put1);
table.close();
}
//删除数据
@Test
public void deleteData() throws IOException {
Table table = conn.getTable(TableName.valueOf("test"));
//参数为 row key
//删除一列
Delete delete1 = new Delete(Bytes.toBytes("hgs_000"));
delete1.addColumn(Bytes.toBytes("testfm"), Bytes.toBytes("weight"));
//删除多列
Delete delete2 = new Delete(Bytes.toBytes("hgs_001"));
delete2.addColumns(Bytes.toBytes("testfm"), Bytes.toBytes("age"));
delete2.addColumns(Bytes.toBytes("testfm"), Bytes.toBytes("sex"));
//删除某一行的列族内容
Delete delete3 = new Delete(Bytes.toBytes("hgs_002"));
delete3.addFamily(Bytes.toBytes("testfm"));
//删除一整行
Delete delete4 = new Delete(Bytes.toBytes("hgs_003"));
table.delete(delete1);
table.delete(delete2);
table.delete(delete3);
table.delete(delete4);
table.close();
}
//查询
//
@Test
public void querySingleRow() throws IOException {
Table table = conn.getTable(TableName.valueOf("test"));
//获得一行
Get get = new Get(Bytes.toBytes("hgs_000"));
Result set = table.get(get);
Cell[] cells = set.rawCells();
for(Cell cell : cells) {
System.out.println(Bytes.toString(cell.getQualifierArray(), cell.getQualifierOffset(), cell.getQualifierLength())+"::"+
Bytes.toString(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength()));
}
table.close();
//Bytes.toInt(result.getValue(Bytes.toBytes("info"), Bytes.toBytes("password")))
}
//全表扫描
@Test
public void scanTable() throws IOException {
Table table = conn.getTable(TableName.valueOf("test"));
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 rsacn = table.getScanner(scan);
for(Result rs:rsacn) {
String rowkey = Bytes.toString(rs.getRow());
System.out.println("row key :"+rowkey);
Cell[] cells = rs.rawCells();
for(Cell cell : cells) {
System.out.println(Bytes.toString(cell.getQualifierArray(), cell.getQualifierOffset(), cell.getQualifierLength())+"::"+
Bytes.toString(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength()));
}
System.out.println("-----------------------------------------");
}
}
//过滤器
@Test
//列值过滤器
public void singColumnFilter() throws IOException {
Table table = conn.getTable(TableName.valueOf("test"));
Scan scan = new Scan();
//下列参数分别为，列族，列名，比较符号，值
SingleColumnValueFilter filter = new SingleColumnValueFilter( Bytes.toBytes("testfm"), Bytes.toBytes("name"),
CompareOperator.EQUAL, Bytes.toBytes("wd")) ;
scan.setFilter(filter);
ResultScanner scanner = table.getScanner(scan);
for(Result rs:scanner) {
String rowkey = Bytes.toString(rs.getRow());
System.out.println("row key :"+rowkey);
Cell[] cells = rs.rawCells();
for(Cell cell : cells) {
System.out.println(Bytes.toString(cell.getQualifierArray(), cell.getQualifierOffset(), cell.getQualifierLength())+"::"+
Bytes.toString(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength()));
}
System.out.println("-----------------------------------------");
}
}
//row key过滤器
@Test
public void rowkeyFilter() throws IOException {
Table table = conn.getTable(TableName.valueOf("test"));
Scan scan = new Scan();
RowFilter filter = new RowFilter(CompareOperator.EQUAL,new RegexStringComparator("^hgs_00*"));
scan.setFilter(filter);
ResultScanner scanner = table.getScanner(scan);
for(Result rs:scanner) {
String rowkey = Bytes.toString(rs.getRow());
System.out.println("row key :"+rowkey);
Cell[] cells = rs.rawCells();
for(Cell cell : cells) {
System.out.println(Bytes.toString(cell.getQualifierArray(), cell.getQualifierOffset(), cell.getQualifierLength())+"::"+
Bytes.toString(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength()));
}
System.out.println("-----------------------------------------");
}
}
//列名前缀过滤器
@Test
public void columnPrefixFilter() throws IOException {
Table table = conn.getTable(TableName.valueOf("test"));
Scan scan = new Scan();
ColumnPrefixFilter filter = new ColumnPrefixFilter(Bytes.toBytes("name"));
scan.setFilter(filter);
ResultScanner scanner = table.getScanner(scan);
for(Result rs:scanner) {
String rowkey = Bytes.toString(rs.getRow());
System.out.println("row key :"+rowkey);
Cell[] cells = rs.rawCells();
for(Cell cell : cells) {
System.out.println(Bytes.toString(cell.getQualifierArray(), cell.getQualifierOffset(), cell.getQualifierLength())+"::"+
Bytes.toString(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength()));
}
System.out.println("-----------------------------------------");
}
}
//过滤器集合
@Test
public void FilterSet() throws IOException {
Table table = conn.getTable(TableName.valueOf("test"));
Scan scan = new Scan();
FilterList list = new FilterList(Operator.MUST_PASS_ALL);
SingleColumnValueFilter filter1 = new SingleColumnValueFilter( Bytes.toBytes("testfm"), Bytes.toBytes("age"),
CompareOperator.GREATER, Bytes.toBytes("23")) ;
ColumnPrefixFilter filter2 = new ColumnPrefixFilter(Bytes.toBytes("weig"));
list.addFilter(filter1);
list.addFilter(filter2);
scan.setFilter(list);
ResultScanner scanner = table.getScanner(scan);
for(Result rs:scanner) {
String rowkey = Bytes.toString(rs.getRow());
System.out.println("row key :"+rowkey);
Cell[] cells = rs.rawCells();
for(Cell cell : cells) {
System.out.println(Bytes.toString(cell.getQualifierArray(), cell.getQualifierOffset(), cell.getQualifierLength())+"::"+
Bytes.toString(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength()));
}
System.out.println("-----------------------------------------");
}
}
@After
public void closeConn() throws IOException {
conn.close();
}
}
关于“hbase 2.0.2 java api怎么用”这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，使各位可以学到更多知识，如果觉得文章不错，请把它分享出去让更多的人看到。
免责声明：本站发布的内容（图片、视频和文字）以原创、转载和分享为主，文章观点不代表本网站立场，如果涉及侵权请联系站长邮箱：is@yisu.com进行举报，并提供相关证据，一经查实，将立刻删除涉嫌侵权内容。