Win10 IDEA远程连接HBase

超级小的大杯柠檬水

发布于 2024-11-21 12:42:56

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代码可运行

文章被收录于专栏：CYCY

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代码可运行

Win10 IDEA远程连接HBase

Win10 IDEA连接虚拟机中的Hadoop（HDFS）

关闭Hadoop和Hbase

如果已经关闭不需要走这一步

cd /usr/local/hbase
bin/stop-hbase.sh
cd /usr/local/hadoop
./sbin/stop-dfs.sh

获取虚拟机的ip

虚拟机终端输入

ip a

关闭虚拟机防火墙

sudo ufw disable

修改Hadoop的`core-site.xml`文件

将IP修改成自己的IP

# 位置可能不一样，和Hadoop安装位置有关
cd /usr/local/hadoop/etc/hadoop
vim core-site.xml

<configuration>
    <property>
        <name>hadoop.tmp.dir</name>
        <value>file:/usr/local/hadoop/tmp</value>
        <description>Abase for other temporary directories.</description>
    </property>
    <property>
        <name>fs.defaultFS</name>
        <value>hdfs://192.168.111.135:9000</value>
    </property>
    <property>
        <name>hadoop.proxyuser.hadoop.hosts</name>
        <value>*</value>
    </property>
    <property>
            <name>hadoop.proxyuser.hadoop.groups</name>
            <value>*</value>
    </property>
</configuration>

修改Hbase的hbase-site.xml

将IP修改成自己的IP

# 位置可能不一样，和Hbase安装位置有关
cd /usr/local/hbase
vim /usr/local/hbase/conf/hbase-site.xml

<configuration>
  <property>
                <name>hbase.rootdir</name>
                <value>hdfs://192.168.111.135:9000/hbase</value>
        </property>
        <property>
                <name>hbase.cluster.distributed</name>
                <value>true</value>
        </property>
        <property>
                <name>hbase.unsafe.stream.capability.enforce</name>
                <value>false</value>
        </property>
	<property>
    <name>hbase.wal.provider</name>
    <value>filesystem</value>
  </property>
      <property>
        <name>hbase.zookeeper.quorum</name>
        <value>192.168.111.135:2181</value>
    </property>
    <property>
		<name>hbase.master.ipc.address</name>
		<value>0.0.0.0</value>
	</property>
	<property>
		<name>hbase.regionserver.ipc.address</name>
		<value>0.0.0.0</value>
	</property>
</configuration>

打开Hadoop和Hbase

cd /usr/local/hadoop
./sbin/start-dfs.sh
cd /usr/local/hbase
bin/start-hbase.sh
jps

IDEA 连接

创建Maven项目

IDEA自带Maven，如果需要自己安装Maven可以参考安装Maven

创建项目，选择Maven，模板选择第一个maven-archetype-archetype

添加依赖（pom.xml）

记得修改自己hbase的版本，我的是2.5.4

设置好后Reload一下

  <dependencies>
    <dependency>
      <groupId>org.apache.hbase</groupId>
      <artifactId>hbase-client</artifactId>
      <version>2.5.4</version>
    </dependency>
  </dependencies>

创建Java文件并运行

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.*;
import org.apache.hadoop.hbase.client.*;
import java.io.IOException;

public class Test01 {
    public static Configuration configuration;
    public static Connection connection;
    public static Admin admin;

    public static void init(){
        System.setProperty("HADOOP_USER_NAME","hadoop");
        configuration  = HBaseConfiguration.create();
        // IP 需要修改
        configuration.set("hbase.zookeeper.quorum", "192.168.111.135");
        configuration.set("hbase.zookeeper.property.clientPort", "2181");
        // IP 需要修改
        configuration.set("hbase.rootdir","hdfs://192.168.111.135:9000/hbase");
        try{
            connection = ConnectionFactory.createConnection(configuration);
            admin = connection.getAdmin();
        }catch (IOException e){
            e.printStackTrace();
        }
    }

    /*
    * 打印所有表名称
    * */
    public static  void  tableListPrint() throws IOException {
        TableName[] tableNames = admin.listTableNames();
        for(TableName tableName : tableNames){
            System.out.println(tableName.getNameAsString());
        }
    }


    public static void close(){
        try{
            if(admin != null){admin.close();}
            if(null != connection){connection.close();}
        }catch (IOException e){
            e.printStackTrace();
        }
    }


    public static void main(String[] args) throws IOException {
        init();
        tableListPrint();
        close();
    }
}

其他

HBase Shell命令

# 进入shell
bin/hbase shell
# 列出HBase中所有的表
list 
# 创建一个新表，表名为StudentInfo，包含两个列族Personal和Grades。
create 'StudentInfo', 'Personal', 'Grades' 
# 向StudentInfo表中插入一条记录，RowKey为2023001，Personal:Name列的值为张三，Grades:Math列的值为90。
put 'StudentInfo','2023001', 'Personal:Name','张三'
put 'StudentInfo','2023001', 'Grades:Math', 90
# 查询RowKey为2023001的所有信息。
get 'StudentInfo','2023001'
# 修改2023001的Grades:Math列的值为95。
put 'StudentInfo', '2023001', 'Grades:Math', '95'
# 删除2023001的Personal:Name列。
delete 'StudentInfo', '2023001', 'Personal:Name'
# 扫描StudentInfo表，查看所有记录。
scan 'StudentInfo'

Java API

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;


public class Work01 {
    public static Configuration configuration;
    public static Connection connection;
    public static Admin admin;

    public static void main(String[] args) throws IOException {
        init();
        // 删除表 第一次运行请注释
//        deleteTable("EmployeeRecords");
        tableListPrint();
        createTable("EmployeeRecords",new String[]{"Info","Salary"});
        tableListPrint();
        insertData("EmployeeRecords","606","Info","Name","CY");
        insertData("EmployeeRecords","606","Info","Department","现代信息产业学院");
        insertData("EmployeeRecords","606","Info","Monthly","50000");
        getData("EmployeeRecords","606");
        updateData("EmployeeRecords","606","60000");
        getData("EmployeeRecords","606");
        deleteData("EmployeeRecords","606");
        close();
    }


    public static void init(){
        System.setProperty("HADOOP_USER_NAME","hadoop");
        configuration  = HBaseConfiguration.create();
        configuration.set("hbase.zookeeper.quorum", "192.168.111.135");
        configuration.set("hbase.zookeeper.property.clientPort", "2181");
        configuration.set("hbase.rootdir","hdfs://localhost:9000/hbase");
        // 避免乱码问题
        configuration.set("hbase.client.encoding.fallback", "UTF-8");
        try{
            connection = ConnectionFactory.createConnection(configuration);
            admin = connection.getAdmin();
        }catch (IOException e){
            e.printStackTrace();
        }
    }

    /*
     * 打印所有表名称
     * */
    public static  void  tableListPrint() throws IOException {
        TableName[] tableNames = admin.listTableNames();
        System.out.print("所有表:");
        for(TableName tableName : tableNames){
            System.out.print(tableName.getNameAsString() + "\t");
        }
        System.out.println();
    }

    public static void createTable(String myTableName,String[] colFamily) throws IOException {
        TableName tableName = TableName.valueOf(myTableName);
        if(admin.tableExists(tableName)){
            System.out.println("talbe is exists!");
        }else {
            TableDescriptorBuilder tableDescriptor = TableDescriptorBuilder.newBuilder(tableName);
            for(String str:colFamily){
                ColumnFamilyDescriptor family =
                        ColumnFamilyDescriptorBuilder.newBuilder(Bytes.toBytes(str)).build();
                tableDescriptor.setColumnFamily(family);
            }
            admin.createTable(tableDescriptor.build());
        }
    }

    public static void deleteTable(String myTableName) throws IOException {
        TableName tableName = TableName.valueOf(myTableName);
        admin.disableTable(tableName);
        admin.deleteTable(tableName);
    }

    public static void insertData(String tableName,String rowKey,String colFamily,String col,String val) throws IOException {
        Table table = connection.getTable(TableName.valueOf(tableName));
        Put put = new Put(rowKey.getBytes());
        put.addColumn(colFamily.getBytes(),col.getBytes(), val.getBytes());
        table.put(put);
        table.close();
    }

    public static void updateData(String tableName,String rowKey,String val) throws IOException {
        Table table = connection.getTable(TableName.valueOf(tableName));
        Put put = new Put(rowKey.getBytes());
        put.addColumn("Info".getBytes(),"Monthly".getBytes(), val.getBytes());
        table.put(put);
        table.close();
    }


    public static void getData(String tableName,String rowKey)throws  IOException{
        Table table = connection.getTable(TableName.valueOf(tableName));
        Get get = new Get(rowKey.getBytes());
        Result result = table.get(get);
        Cell[] cells = result.rawCells();
        System.out.print("行键:"+rowKey);
        for (Cell cell : cells) {
            //获取列名
            String colName = Bytes.toString(cell.getQualifierArray(),cell.getQualifierOffset(),cell.getQualifierLength());
            String value = Bytes.toString(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength());
            System.out.print("\t"+colName+":"+value);
        }
        System.out.println();
        table.close();
    }

    public static void deleteData(String tableName,String rowKey)throws  IOException{
        Table table = connection.getTable(TableName.valueOf(tableName));
        Delete delete = new Delete(rowKey.getBytes());
        table.delete(delete);
        System.out.println("删除成功");
    }

    public static void close(){
        try{
            if(admin != null){admin.close();}
            if(null != connection){connection.close();}
        }catch (IOException e){
            e.printStackTrace();
        }
    }
}

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原始发表：2024-10-21，如有侵权请联系 cloudcommunity@tencent.com 删除

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