eclipse+HBASE开发环境搭建（已实践）

开发准备：

　　jdk1.8.45

　　hbase-1.2.2（windows下和linux个留一份）

　　hadoop-2.7.2（linux一份）

　　Linux系统（centos或其它）

　　Hadoop安装环境

　　HBase安装环境

具体操作步骤如下：

1. Eclipse中新建Maven项目， type为maven-archetype-quickstart，工程名为MyHBase

2. 将hadoop集群和hbase集群的配置文件放到如下路径:

/src/main/resources/hadoop
/src/main/resources/hbase

3. 将配置路径加入到classpath中：

　　


4. 最终的目录结构





5. 编辑hbase-site.xml文件内容为：

　　


6. 将Linux下部署的HBase集群下的lib目录拷贝到Windows下，并在eclipse中将lib（里面的hadoop库可能与安装的hadoop版本不一致，后续可以考虑版本统一）下的所有库添加到工程：



7. 新建类HBaseTest ，内容如下：

package com.hbase.demo;
//package com.eric.hbase;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.MasterNotRunningException;
import org.apache.hadoop.hbase.ZooKeeperConnectionException;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.client.HTable;
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.util.Bytes;

public class HBaseTest {

private static final String TABLE_NAME = "demo_table";

public static Configuration conf = null;
public HTable table = null;
public HBaseAdmin admin = null;

static {
conf = HBaseConfiguration.create();
System.out.println(conf.get("hbase.zookeeper.quorum"));
}

/**
* 创建一张表
*/
public static void creatTable(String tableName, String[] familys)
throws Exception {
HBaseAdmin admin = new HBaseAdmin(conf);
if (admin.tableExists(tableName)) {
System.out.println("table already exists!");
} else {
HTableDescriptor tableDesc = new HTableDescriptor(tableName);
for (int i = 0; i < familys.length; i++) {
tableDesc.addFamily(new HColumnDescriptor(familys[i]));
}
admin.createTable(tableDesc);
System.out.println("create table " + tableName + " ok.");
}
}

/**
* 删除表
*/
public static void deleteTable(String tableName) throws Exception {
try {
HBaseAdmin admin = new HBaseAdmin(conf);
admin.disableTable(tableName);
admin.deleteTable(tableName);
System.out.println("delete table " + tableName + " ok.");
} catch (MasterNotRunningException e) {
e.printStackTrace();
} catch (ZooKeeperConnectionException e) {
e.printStackTrace();
}
}

/**
* 插入一行记录
*/
public static void addRecord(String tableName, String rowKey,
String family, String qualifier, String value) throws Exception {
try {
HTable table = new HTable(conf, tableName);
Put put = new Put(Bytes.toBytes(rowKey));
put.add(Bytes.toBytes(family), Bytes.toBytes(qualifier),
Bytes.toBytes(value));
table.put(put);
System.out.println("insert recored " + rowKey + " to table "
+ tableName + " ok.");
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* 删除一行记录
*/
public static void delRecord(String tableName, String rowKey)
throws IOException {
HTable table = new HTable(conf, tableName);
List list = new ArrayList();
Delete del = new Delete(rowKey.getBytes());
list.add(del);
table.delete(list);
System.out.println("del recored " + rowKey + " ok.");
}

/**
* 查找一行记录
*/
public static void getOneRecord(String tableName, String rowKey)
throws IOException {
HTable table = new HTable(conf, tableName);
Get get = new Get(rowKey.getBytes());
Result rs = table.get(get);
for (KeyValue kv : rs.raw()) {
System.out.print(new String(kv.getRow()) + " ");
System.out.print(new String(kv.getFamily()) + ":");
System.out.print(new String(kv.getQualifier()) + " ");
System.out.print(kv.getTimestamp() + " ");
System.out.println(new String(kv.getValue()));
}
}

/**
* 显示所有数据
*/
public static void getAllRecord(String tableName) {
try {
HTable table = new HTable(conf, tableName);
Scan s = new Scan();
ResultScanner ss = table.getScanner(s);
for (Result r : ss) {
for (KeyValue kv : r.raw()) {
System.out.print(new String(kv.getRow()) + " ");
System.out.print(new String(kv.getFamily()) + ":");
System.out.print(new String(kv.getQualifier()) + " ");
System.out.print(kv.getTimestamp() + " ");
System.out.println(new String(kv.getValue()));
}
}
} catch (IOException e) {
e.printStackTrace();
}
}

public static void main(String[] args) {
// TODO Auto-generated method stub
try {
String tablename = "scores";
String[] familys = { "grade", "course" };
HBaseTest.creatTable(tablename, familys);

// add record zkb
HBaseTest.addRecord(tablename, "zkb", "grade", "", "5");
HBaseTest.addRecord(tablename, "zkb", "course", "", "90");
HBaseTest.addRecord(tablename, "zkb", "course", "math", "97");
HBaseTest.addRecord(tablename, "zkb", "course", "art", "87");
// add record baoniu
HBaseTest.addRecord(tablename, "baoniu", "grade", "", "4");
HBaseTest
.addRecord(tablename, "baoniu", "course", "math", "89");

System.out.println("===========get one record========");
HBaseTest.getOneRecord(tablename, "zkb");

System.out.println("===========show all record========");
HBaseTest.getAllRecord(tablename);

System.out.println("===========del one record========");
HBaseTest.delRecord(tablename, "baoniu");
HBaseTest.getAllRecord(tablename);

System.out.println("===========show all record========");
HBaseTest.getAllRecord(tablename);
} catch (Exception e) {
e.printStackTrace();
}
}
}

8. 如果报错查看日志，修改C:\Windows\System32\drivers\etc\HOSTS:

　　112.120.41.159 hadoop

9. 右键-->Run as -->java application.