1. HBase相关对Admin操作的的API封装在HBaseAdmin中，封装了HBase常用操作的API
使用方法：
pom.xml
org.apache.hbase hbase-client 0.98.5-hadoop2
1 package com.qunar.demo.hbase; 2 3 import com.google.common.base.Preconditions; 4 import com.google.common.base.Strings; 5 import com.google.common.collect.Lists; 6 import org.apache.hadoop.conf.Configuration; 7 import org.apache.hadoop.hbase.HBaseConfiguration; 8 import org.apache.hadoop.hbase.HColumnDescriptor; 9 import org.apache.hadoop.hbase.HTableDescriptor;10 import org.apache.hadoop.hbase.TableName;11 import org.apache.hadoop.hbase.client.HBaseAdmin;12 import org.junit.Test;13 import org.slf4j.Logger;14 import org.slf4j.LoggerFactory;15 16 import java.io.IOException;17 import java.util.Iterator;18 import java.util.List;19 20 /**21 * author: 龚细军22 * class-aim:23 */24 public class CreateHBaseTable {25 26 private static Logger logger = LoggerFactory.getLogger(CreateHBaseTable.class);27 28 /*创建表单*/29 public void createTable(HBaseAdmin admin, String tableName,30 List columnNames) throws IOException {31 32 33 Preconditions.checkArgument(!Strings.isNullOrEmpty(tableName), "table name is not allowed null or empty !");34 Preconditions.checkArgument((null != columnNames && columnNames.size() > 0), "colume is not allowed empty !");35 if (null == admin) {36 throw new IllegalStateException("admin is empty !");37 }38 39 HTableDescriptor hTableDescriptor = new HTableDescriptor(TableName.valueOf(tableName));40 for (String colName : columnNames) {41 hTableDescriptor.addFamily(new HColumnDescriptor(colName));42 }43 admin.createTable(hTableDescriptor);44 }45 46 @Test47 public void _createMain() throws IOException {48 49 Configuration conf = HBaseConfiguration.create();50 HBaseAdmin admin = new HBaseAdmin(conf);51 List list = Lists.newArrayList();52 list.add("emp_col");53 list.add("emp_col1");54 list.add("emp_col2");55 list.add("emp_col3");56 this.createTable(admin, "emp", list);57 }58 59 /*查询所有表单*/60 public List scanTables(HBaseAdmin admin) {61 62 HTableDescriptor[] hTableDescriptors = new HTableDescriptor[0];63 if (null == admin) {64 throw new IllegalStateException("admin is empty !");65 }66 try {67 hTableDescriptors = admin.listTables();68 } catch (IOException e) {69 logger.error("获取表单异常", e);70 }71 List tmpList = Lists.newArrayList();72 for (HTableDescriptor hTableDescriptor : hTableDescriptors) {73 tmpList.add(String.valueOf(hTableDescriptor.getNameAsString()));74 }75 return tmpList;76 }77 78 @Test79 public void _scanTables() throws IOException {80 Configuration conf = HBaseConfiguration.create();81 HBaseAdmin admin = new HBaseAdmin(conf);82 List tableNames = this.scanTables(admin);83 Iterator iterator = tableNames.iterator();84 while (iterator.hasNext()) {85 //日志被收集了,使用下面方式打出86 //logger.info(String.valueOf(iterator.next()));87 System.out.println(String.valueOf(iterator.next()));88 }89 }90 91 92 }
HBase对于客户端封装在client调用：
1 package com.qunar.demo.hbase; 2 3 import com.google.common.base.Strings; 4 import org.apache.hadoop.conf.Configuration; 5 import org.apache.hadoop.hbase.HBaseConfiguration; 6 import org.apache.hadoop.hbase.client.Get; 7 import org.apache.hadoop.hbase.client.HTable; 8 import org.apache.hadoop.hbase.client.Put; 9 import org.apache.hadoop.hbase.client.Result; 10 import org.apache.hadoop.hbase.util.Bytes; 11 import org.junit.Test; 12 import org.slf4j.Logger; 13 import org.slf4j.LoggerFactory; 14 15 import java.io.IOException; 16 17 import static com.google.common.base.Preconditions.checkArgument; 18 19 /** 20 * author: 龚细军 21 * class-aim: HBase客户端操作API使用 22 */ 23 24 public class HBaseClientDemo { 25 26 private Logger logger = LoggerFactory.getLogger(HBaseClientDemo.class); 27 private Configuration configuration; 28 29 /** 30 * 插入数据 31 * 32 * @param configuration 33 */ 34 public void InsertData(Configuration configuration, 35 String table_Name, String row, 36 String col, String col_name, String value) { 37 38 checkArgument(configuration != null, "configuration is null "); 39 checkArgument(!Strings.isNullOrEmpty(table_Name), "tableName is empty"); 40 checkArgument(!Strings.isNullOrEmpty(row), "row is empty"); 41 checkArgument(!Strings.isNullOrEmpty(col), "col is empty"); 42 checkArgument(!Strings.isNullOrEmpty(col_name), "col_name is empty"); 43 checkArgument(!Strings.isNullOrEmpty(value), "value is empty"); 44 HTable hTable = null; 45 46 try { 47 hTable = new HTable(configuration, table_Name); 48 Put put = new Put(Bytes.toBytes(row)); 49 put.add(Bytes.toBytes(col), Bytes.toBytes(col_name), Bytes.toBytes(value)); 50 hTable.put(put); 51 } catch (IOException e1) { 52 logger.error("put data Exception", e1); 53 } finally { 54 try { 55 if (hTable != null) hTable.close(); 56 } catch (IOException e) { 57 logger.error("close HTable Exception", e); 58 } 59 } 60 } 61 62 /** 63 * 获取数据 64 */ 65 public Result getData(Configuration configuration, 66 String table_Name, String row) { 67 68 checkArgument(configuration != null, "configuration is null "); 69 checkArgument(!Strings.isNullOrEmpty(table_Name), "tableName is empty"); 70 checkArgument(!Strings.isNullOrEmpty(row), "row is empty"); 71 HTable hTable = null; 72 Result result = null; 73 try { 74 hTable = new HTable(configuration, table_Name); 75 Get get = new Get(Bytes.toBytes(row)); 76 result = hTable.get(get); 77 } catch (IOException e1) { 78 logger.error("put data Exception", e1); 79 } finally { 80 try { 81 if (hTable != null) hTable.close(); 82 } catch (IOException e) { 83 logger.error("close HTable Exception", e); 84 } 85 } 86 return result; 87 } 88 89 /** 90 * 获取数据 91 */ 92 public Result getData(Configuration configuration, 93 String table_Name, String row, 94 String col) { 95 96 checkArgument(configuration != null, "configuration is null "); 97 checkArgument(!Strings.isNullOrEmpty(table_Name), "tableName is empty"); 98 checkArgument(!Strings.isNullOrEmpty(row), "row is empty"); 99 checkArgument(!Strings.isNullOrEmpty(col), "col is empty");100 HTable hTable = null;101 Result result = null;102 try {103 hTable = new HTable(configuration, table_Name);104 Get get = new Get(Bytes.toBytes(row));105 result = hTable.get(get.addFamily(Bytes.toBytes(col)));106 } catch (IOException e1) {107 logger.error("put data Exception", e1);108 } finally {109 try {110 if (hTable != null) hTable.close();111 } catch (IOException e) {112 logger.error("close HTable Exception", e);113 }114 }115 return result;116 }117 118 119 /**120 * 获取数据121 */122 public Result getData(Configuration configuration,123 String table_Name, String row,124 String col, String col_name) {125 126 checkArgument(configuration != null, "configuration is null ");127 checkArgument(!Strings.isNullOrEmpty(table_Name), "tableName is empty");128 checkArgument(!Strings.isNullOrEmpty(row), "row is empty");129 checkArgument(!Strings.isNullOrEmpty(col), "col is empty");130 checkArgument(!Strings.isNullOrEmpty(col_name), "col_name is empty");131 HTable hTable = null;132 Result result = null;133 try {134 hTable = new HTable(configuration, table_Name);135 Get get = new Get(Bytes.toBytes(row));136 result = hTable.get(get.addColumn(Bytes.toBytes(col),137 Bytes.toBytes(col_name)));138 } catch (IOException e1) {139 logger.error("put data Exception", e1);140 } finally {141 try {142 if (hTable != null) hTable.close();143 } catch (IOException e) {144 logger.error("close HTable Exception", e);145 }146 }147 return result;148 }149 150 151 @Test152 public void _testPut() {153 configuration = HBaseConfiguration.create();154 this.InsertData(configuration, "emp", "2", "emp_col1", "name", "gongxijun");155 }156 157 @Test158 public void _testGet() {159 configuration = HBaseConfiguration.create();160 System.out.println(this.getData(configuration, "emp", "1","emp_col","name"));161 }162 163 }
结果：
1 /home/gongxijun/java/jdk1.7.0_40/bin/java -ea -Didea.launcher.port=7535 -Didea.launcher.bin.path=/home/gongxijun/Qunar/idea-IU-139.1117.1/bin -Dfile.encoding=UTF-8 -classpath 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com.intellij.rt.execution.application.AppMain com.intellij.rt.execution.junit.JUnitStarter -ideVersion5 com.qunar.demo.hbase.HBaseClientDemo,_testGet2 log4j:WARN No appenders could be found for logger (org.apache.hadoop.metrics2.lib.MutableMetricsFactory).3 log4j:WARN Please initialize the log4j system properly.4 log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.5 keyvalues={1/emp_col:name/1467883522089/Put/vlen=8/mvcc=0}6 7 Process finished with exit code 0