java如何修改hbase表数据

Question

注意：是修改hbase表的数据，不是新增、删除、查询，是修改

Answer 1

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.MasterNotRunningException;
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.HTable;
import org.apache.hadoop.hbase.client.HTableInterface;
import org.apache.hadoop.hbase.client.HTablePool;
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.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 HBaseTest {

public static Configuration configuration;
static {
configuration = HBaseConfiguration.create();
configuration.set("hbase.zookeeper.property.clientPort", "2181");
configuration.set("hbase.zookeeper.quorum", "192.168.1.118");
configuration.set("hbase.master", "192.168.1.118:600000");
}

public static void main(String[] args) {
createTable("wujintao");
insertData("wujintao");
QueryAll("wujintao");
QueryByCondition1("wujintao");
QueryByCondition2("wujintao");
QueryByCondition3("wujintao");
deleteRow("wujintao", "abcdef");
deleteByCondition("wujintao", "abcdef");
}

/**

• 创建表
• @param tableName */ public static void createTable(String tableName) { System.out.println("start create table ......"); try { HBaseAdmin hBaseAdmin = new HBaseAdmin(configuration); if (hBaseAdmin.tableExists(tableName)) {// 如果存在要创建的表，那么先删除，再创建 hBaseAdmin.disableTable(tableName); hBaseAdmin.deleteTable(tableName); System.out.println(tableName + " is exist,detele...."); } HTableDescriptor tableDescriptor = new HTableDescriptor(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 ......"); }

/**

• 插入数据
• @param tableName */ public static void insertData(String tableName) { System.out.println("start insert data ......"); HTablePool pool = new HTablePool(configuration, 1000); // HTable table=new HTable(configuration, tableName); HTableInterface table = pool.getTable(tableName); Put put = new Put("112233bbbcccc".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.add("column1".getBytes(), null, "aaa".getBytes());// 本行数据的第一列 put.add("column2".getBytes(), null, "bbb".getBytes());// 本行数据的第三列 put.add("column3".getBytes(), null, "ccc".getBytes());// 本行数据的第三列 try { table.put(put); } catch (IOException e) { e.printStackTrace(); } System.out.println("end insert data ......"); }

/**

• 删除一张表
• @param tableName */ public static void dropTable(String tableName) { try { HBaseAdmin admin = new HBaseAdmin(configuration); admin.disableTable(tableName); admin.deleteTable(tableName); } catch (MasterNotRunningException e) { e.printStackTrace(); } catch (ZooKeeperConnectionException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); }

}

/**

• 根据 rowkey删除一条记录
• @param tablename
• @param rowkey */ public static void deleteRow(String tablename, String rowkey) { try { HTablePool pool = new HTablePool(configuration, 1000); HTableInterface table = pool.getTable(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();
}

}

/**

• 组合条件删除
• @param tablename
• @param rowkey */ public static void deleteByCondition(String tablename, String rowkey) { // 目前还没有发现有效的API能够实现 根据非rowkey的条件删除 这个功能能，还有清空表全部数据的API操作

}

/**

• 查询所有数据
• @param tableName */ public static void QueryAll(String tableName) { HTablePool pool = new HTablePool(configuration, 1000); HTableInterface table = pool.getTable(tableName); try { 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(); } }

/**

• 单条件查询,根据rowkey查询唯一一条记录
• @param tableName */ public static void QueryByCondition1(String tableName) {

HTablePool pool = new HTablePool(configuration, 1000);
HTableInterface table = pool.getTable(tableName);
try {
Get scan = new Get("abcdef".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(); } }

/**

• 单条件按查询，查询多条记录
• @param tableName */ public static void QueryByCondition2(String tableName) {

try {
HTablePool pool = new HTablePool(configuration, 1000);
HTableInterface table = pool.getTable(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(); }

}

/**

• 组合条件查询
• @param tableName */ public static void QueryByCondition3(String tableName) {

try {
HTablePool pool = new HTablePool(configuration, 1000);
HTableInterface table = pool.getTable(tableName);

List filters = new ArrayList();

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();
}

}

}