HBase 通过 Maven 用 Java API 进行增删查put/get/delete

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1. 读写源码

注意加注释的地方！！！

/** * App.java */package jiecxy;import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.hbase.HBaseConfiguration;import org.apache.hadoop.hbase.TableName;import org.apache.hadoop.hbase.client.*;import java.io.IOException;public class App{    public static void main( String[] args )    {        // 建立连接        Configuration conf = HBaseConfiguration.create();        conf.set("hbase.rootdir", "hdfs://localhost:9000/hbase");        Connection conn = null;        Admin admin = null;        try {            conn = ConnectionFactory.createConnection(conf);            admin = conn.getAdmin();        } catch (IOException e) {            e.printStackTrace();        }        String TABLE_NAME = "test";        String COLUMN_FAMILY_NAME = "columnfamily";        String COLUMN_FAMILY_NAME2 = "columnfamily1";        String[] COLUMNS = {"column0", "column1", "column2"};        // Some data        String ROW_KEYS = "row0";        String[] VALUES = {"value0", "value1", "value2"};        System.out.println("CREATE TABLE ==========================");        // 创建表        TableName tableName = TableName.valueOf(TABLE_NAME);        try {            // 存在则删除            if (admin.tableExists(tableName)) {                admin.disableTable(tableName);                admin.deleteTable(tableName);            }            TableDescriptor descriptor = TableDescriptorBuilder.newBuilder(tableName)                    .addColumnFamily(ColumnFamilyDescriptorBuilder.newBuilder(COLUMN_FAMILY_NAME.getBytes()).build())                    .addColumnFamily(ColumnFamilyDescriptorBuilder.newBuilder(COLUMN_FAMILY_NAME2.getBytes()).build())                    .build();            admin.createTable(descriptor);        } catch (IOException e) {            e.printStackTrace();        }        System.out.println("PUT VALUE ==========================");        // 添加数据        try {            Table table = conn.getTable(tableName);            Put put = new Put(ROW_KEYS.getBytes());            put.addColumn(COLUMN_FAMILY_NAME.getBytes(), COLUMNS[0].getBytes(), VALUES[0].getBytes());            put.addColumn(COLUMN_FAMILY_NAME.getBytes(), COLUMNS[1].getBytes(), VALUES[1].getBytes());            put.addColumn(COLUMN_FAMILY_NAME.getBytes(), COLUMNS[2].getBytes(), VALUES[2].getBytes());            table.put(put);            table.close();        } catch (IOException e) {            e.printStackTrace();        }        System.out.println("DELETE VALUE ==========================");        // 删除数据： 删除row0的column2列        try {            Table table = conn.getTable(tableName);            Delete delete = new Delete(ROW_KEYS.getBytes());            delete.addColumn(COLUMN_FAMILY_NAME.getBytes(), COLUMNS[2].getBytes());            table.delete(delete);            table.close();        } catch (IOException e) {            e.printStackTrace();        }        System.out.println("GET VALUE ==========================");        // 查询数据        try {            Table table = conn.getTable(tableName);            Get get = new Get(ROW_KEYS.getBytes());            //get.addFamily(COLUMN_FAMILY_NAME.getBytes());                         // 获取特定列族的数据            //get.addColumn(COLUMN_FAMILY_NAME.getBytes(), COLUMNS[1].getBytes());  // 获取特定列的数据            Result result = table.get(get);            // get column family            result.getFamilyMap(COLUMN_FAMILY_NAME.getBytes()).forEach((k,v) -> System.out.println(new String(k) + ":" + new String(v)));            table.close();        } catch (IOException e) {            e.printStackTrace();        }        // 关闭连接        try {            if (admin != null) {                admin.close();            }            if (conn != null) {                conn.close();            }        } catch (IOException e) {            e.printStackTrace();        }    }}

运行结果：
这里写图片描述

2. pom.xml文件配置

注意：    1. 使用shade方式防止打包失败    2. 这里的dependency只需引用 `hbase-client`

<project xmlns="http://maven.apache.org/POM/4.0.0" 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">  <modelVersion>4.0.0</modelVersion>  <groupId>HBaseTest</groupId>  <artifactId>HBaseTest</artifactId>  <version>1.0</version>  <packaging>jar</packaging>  <name>HBaseTest</name>  <url>http://maven.apache.org</url>  <properties>    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>  </properties>  <dependencies>      <dependency>        <groupId>org.apache.hbase</groupId>        <artifactId>hbase-client</artifactId>        <version>2.0.0-alpha3</version>      </dependency>  </dependencies>    <build>        <plugins>            <plugin>                <groupId>org.apache.maven.plugins</groupId>                <artifactId>maven-shade-plugin</artifactId>                <executions>                    <!-- Run shade goal on package phase -->                    <execution>                        <phase>package</phase>                        <goals>                            <goal>shade</goal>                        </goals>                        <configuration>                            <filters>                                <filter>                                    <!-- Do not copy the signatures in the META-INF folder.                                    Otherwise, this might cause SecurityExceptions when using the JAR. -->                                    <artifact>*:*</artifact>                                    <excludes>                                        <exclude>META-INF/*.SF</exclude>                                        <exclude>META-INF/*.DSA</exclude>                                        <exclude>META-INF/*.RSA</exclude>                                    </excludes>                                </filter>                            </filters>                            <transformers>                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">                                    <mainClass>jiecxy.App</mainClass>                                </transformer>                            </transformers>                            <createDependencyReducedPom>false</createDependencyReducedPom>                        </configuration>                    </execution>                </executions>            </plugin>            <plugin>                <groupId>org.apache.maven.plugins</groupId>                <artifactId>maven-compiler-plugin</artifactId>                <configuration>                    <source>1.8</source>                    <target>1.8</target>                </configuration>            </plugin>        </plugins>    </build></project>

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