HBaseJavaAPI
hbaseApiOperation.java 文件在 src目录 main-》java-》 com.HbaseUtils目录下 项目树：
D:.
├─.idea
│ ├─codeStyles
│ ├─inspectionProfiles
│ └─libraries
├─src
│ ├─main
│ │ ├─java
│ │ │ └─com
│ │ │ └─HbaseUtils
│ │ └─resources
│ └─test
│ └─java
└─target
├─classes
│ └─com
│ └─HbaseUtils
└─generated-sources
└─annotations
1、pom.xml
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
2、Api操作
package com.HbaseUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.*;
import org.apache.hadoop.hbase.client.*;
import org.apache.hadoop.hbase.util.Bytes;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
public class hbaseApiOperation {
private static Connection connection = null;
private static Admin admin = null;
static {
//获取配置信息
Configuration configuration = HBaseConfiguration.create();
configuration.set("hbase.zookeeper.quorum", "hadoop102");
try {
//获取连接
connection = ConnectionFactory.createConnection(configuration);
//获取HBaseAdmin对象
admin = connection.getAdmin();
} catch (IOException e) {
e.printStackTrace();
}
}
private static void close(Connection connection, Admin admin) {
if (connection != null) {
try {
connection.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (admin != null) {
try {
admin.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
//判断表是否存在
private static boolean tableExist(String tableName) throws IOException {
return admin.tableExists(TableName.valueOf(tableName));
// HBaseAdmin admin = new HBaseAdmin(configuration);
// return admin.tableExists(tableName);
}
//创建表
private static void createTable(String tableName, List
if (tableExist(tableName)) {
System.out.println("表" + tableName + "已存在！");
return;
}
//创建表描述器
HTableDescriptor hTableDescriptor = new HTableDescriptor(TableName.valueOf(tableName));
for (String cf : columnFamilys) {
//创建列描述器
HColumnDescriptor hColumnDescriptor = new HColumnDescriptor(cf);
hTableDescriptor.addFamily(hColumnDescriptor);
}
try {
//创建表操作
admin.createTable(hTableDescriptor);
} catch (IOException e) {
e.printStackTrace();
}
}
//删除表
private static void deleteTable(String tableName) throws IOException {
if (!tableExist(tableName)) {
System.out.println("表" + tableName + "不存在！");
return;
}
//使表不可用
admin.disableTable(TableName.valueOf(tableName));
//删除表操作
admin.deleteTable(TableName.valueOf(tableName));
}
//插入一条数据
private static void putData(String tableName, String rowkey, String cf, String cn, String value) throws IOException {
//获取表对象
Table table = connection.getTable(TableName.valueOf(tableName));
//创建put对象
Put put = new Put(Bytes.toBytes(rowkey));
//添加列族，列名，值
put.addColumn(Bytes.toBytes(cf), Bytes.toBytes(cn), Bytes.toBytes(value));
//执行put操作
table.put(put);
//关闭表连接
table.close();
}
//查询一条数据
private static void getData(String tableName, String rowkey) throws IOException {
//获取表对象
Table table = connection.getTable(TableName.valueOf(tableName));
Get get = new Get(Bytes.toBytes(rowkey));
Result result = table.get(get);
Cell[] cells = result.rawCells();
//打印获得的数据
for (Cell cell : cells) {
System.out.println("rowkey:" + Bytes.toString(CellUtil.cloneRow(cell))
+ ",CF:" + Bytes.toString(CellUtil.cloneFamily(cell))
+ ",CN:" + Bytes.toString(CellUtil.cloneQualifier(cell))
+ ",VALUE:" + Bytes.toString(CellUtil.cloneValue(cell)));
}
//关闭表连接
table.close();
}
//获取一行数据（指定列族：列）
private static void getDataByCN(String tableName, String rowkey, String cf, String cn) throws IOException {
Table table = connection.getTable(TableName.valueOf(tableName));
Get get = new Get(Bytes.toBytes(rowkey));
// get.addFamily()//获取一个列族下的所有数据
get.addColumn(Bytes.toBytes(cf), Bytes.toBytes(cn));
get.setMaxVersions(3);
Result result = table.get(get);
Cell[] cells = result.rawCells();
//打印获得的数据
for (Cell cell : cells) {
System.out.println("rowkey:" + Bytes.toString(CellUtil.cloneRow(cell))
+ ",CF:" + Bytes.toString(CellUtil.cloneFamily(cell))
+ ",CN:" + Bytes.toString(CellUtil.cloneQualifier(cell))
+ ",VALUE:" + Bytes.toString(CellUtil.cloneValue(cell)));
}
table.close();
}
//全表扫描
private static void scanData(String tableName) throws IOException {
//获取table对象
Table table = connection.getTable(TableName.valueOf(tableName));
Scan scan = new Scan();
ResultScanner scanner = table.getScanner(scan);
for (Result result : scanner) {
Cell[] cells = result.rawCells();
//打印获得的数据
for (Cell cell : cells) {
System.out.println("rowkey:" + Bytes.toString(CellUtil.cloneRow(cell))
+ ",CF:" + Bytes.toString(CellUtil.cloneFamily(cell))
+ ",CN:" + Bytes.toString(CellUtil.cloneQualifier(cell))
+ ",VALUE:" + Bytes.toString(CellUtil.cloneValue(cell)));
}
}
table.close();
}
//删除一条数据
private static void deletaData(String tableName, String rowKey, String cf, String cn) throws IOException {
Table table = connection.getTable(TableName.valueOf(tableName));
//获取Delete对象
Delete delete = new Delete(Bytes.toBytes(rowKey));
//给Delete对象添加具体的列族：列
Delete delete1 = delete.addColumn(Bytes.toBytes(cf), Bytes.toBytes(cn));
// delete.addFamilyVersion(Bytes.toBytes(cf), System.currentTimeMillis());
//实际的删除操作
table.delete(delete);
table.close();
}
//删除多条数据
private static void deleteDatas(String tableName, String... rowKeys) throws IOException {
Table table = connection.getTable(TableName.valueOf(tableName));
ArrayList
for (String rowKey : rowKeys) {
Delete delete = new Delete(Bytes.toBytes(rowKey));
deletes.add(delete);
}
table.delete(deletes);
table.close();
}
public static void main(String[] args) throws IOException {
//判断表是否存在
// System.out.println(tableExist("student"));
//创建表staff,一个列族
// createTable("staff", Collections.singletonList("f1"));
//创建表staff1，多个列族
// ArrayList
// cfs.add("f1");
// cfs.add("f2");
// createTable("staff1", cfs);
//删除表
// deleteTable("staff1");
//插入一条数据
putData("student", "1001", "f1", "name", "xueba");
putData("student", "1001", "f1", "name", "xuezha");
putData("student", "1001", "f1", "name", "xuemei");
//获取一行数据
// getData("staff", "1001");
//获取一行数据（指定列族：列）
getDataByCN("student", "1001", "f1", "name");
//扫描整张表
// scanData("student");
//删除一行数据
// deletaData("student", "1001", "f1", "name");
//删除多行数据
// deleteDatas("student", "1002", "1003");
//关闭相应资源
close(connection, admin);
}
}
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