这篇文章主要介绍“Hbase的测试代码是怎样的”，在日常操作中，相信很多人在Hbase的测试代码是怎样的问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”Hbase的测试代码是怎样的”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！
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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.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.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.filter.CompareFilter.CompareOp;
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.util.Bytes;
public class HBaseTest {
public static Configuration configuration;
public static Connection conn = null;
static {
configuration = HBaseConfiguration.create();
configuration.set("hbase.zookeeper.property.clientPort", "2181");
// configuration.set("hbase.zookeeper.quorum", "bfct163");
// configuration.set("hbase.master", "bfct162:60000");
configuration.set("hbase.zookeeper.quorum", "192.168.17.163");
configuration.set("hbase.master", "192.168.17.162:60000");
try {
conn = ConnectionFactory.createConnection(configuration);
} catch (IOException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
// createTable("wujintao");
// insertData("wujintao");
QueryAll("wujintao");
// QueryByCondition1("wujintao");
// QueryByCondition2("wujintao");
// QueryByCondition3("wujintao");
// deleteRow("wujintao","112233bbbcccc");
// deleteByCondition("wujintao","abcdef");
// dropTable("wujintao");
}
/**
* 创建表
*
* @param tableName
*/
public static void createTable(String tableName) {
System.out.println("start create table ......");
try {
TableName TABLE = TableName.valueOf(tableName);
Admin hBaseAdmin = conn.getAdmin();
if (hBaseAdmin.tableExists(TABLE)) {// 如果存在要创建的表，那么先删除，再创建
hBaseAdmin.disableTable(TABLE);
hBaseAdmin.deleteTable(TABLE);
System.out.println(tableName + " is exist,detele....");
}
HTableDescriptor tableDescriptor = new HTableDescriptor(TABLE);
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 ......");
try {
TableName TABLE = TableName.valueOf(tableName);
Table table = conn.getTable(TABLE);
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.addColumn("column1".getBytes(), null, "aaa".getBytes());// 本行数据的第一列addColumn
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 ......");
}
/**
* 删除一张表
*
* @param tableName
*/
public static void dropTable(String tableName) {
try {
TableName TABLE = TableName.valueOf(tableName);
Admin admin = conn.getAdmin();
admin.disableTable(TABLE);
admin.deleteTable(TABLE);
} 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 {
TableName TABLE = TableName.valueOf(tableName);
Table table = conn.getTable(TABLE);
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) {
try {
TableName TABLE = TableName.valueOf(tableName);
Table table = conn.getTable(TABLE);
ResultScanner rs = table.getScanner(new Scan());
for (Result r : rs) {
System.out.println("获得到rowkey:" + new String(r.getRow()));
for (Cell cell : r.listCells()) {
System.out.println("列：" + new String(CellUtil.cloneFamily(cell)) + "====值:" + new String(CellUtil.cloneValue(cell)));
}
}
} 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) {
try {
TableName TABLE = TableName.valueOf(tableName);
Table table = conn.getTable(TABLE);
Get scan = new Get("112233bbbcccc".getBytes());// 根据rowkey查询
Result r = table.get(scan);
System.out.println("获得到rowkey:" + new String(r.getRow()));
for (Cell cell : r.listCells()) {
System.out.println("列：" + new String(CellUtil.cloneFamily(cell)) + "====值:" + new String(CellUtil.cloneValue(cell)));
}
} 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 {
TableName TABLE = TableName.valueOf(tableName);
Table table = conn.getTable(TABLE);
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 (Cell cell : r.listCells()) {
System.out.println("列：" + new String(CellUtil.cloneFamily(cell)) + "====值:" + new String(CellUtil.cloneValue(cell)));
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 组合条件查询
*
* @param tableName
*/
public static void QueryByCondition3(String tableName) {
try {
TableName TABLE = TableName.valueOf(tableName);
Table table = conn.getTable(TABLE);
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 (Cell cell : r.listCells()) {
System.out.println("列：" + new String(CellUtil.cloneFamily(cell)) + "====值:" + new String(CellUtil.cloneValue(cell)));
}
}
rs.close();
} catch (Exception e) {
e.printStackTrace();
}
}
} 到此，关于“Hbase的测试代码是怎样的”的学习就结束了，希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习，快去试试吧！若想继续学习更多相关知识，请继续关注创新互联网站，小编会继续努力为大家带来更多实用的文章！
