1.hbase的伪分布安装
1.1 下载hbase
http://archive.apache.org/dist/hbase/
1.2 sudo tar -zxf ~/Downloads/hbase-1.2.4-bin.tar.gz -C /usr/local
1.3 sudo mv /usr/local/hbase-1.2.4 /usr/local/hbase
1.4 添加hbase路径，vi ~/.bashrc，
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source ~/.bashrc
1.5 查看安装情况，cd /usr/local
sudo chown -R hadoop ./hbase
hbase version
1.6 配置
vi /usr/local/hbase/conf/hbase-env.sh
内容：
export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-i386
export HBASE_CLASSPATH=/usr/local/hadoop/conf
export HBASE_MANAGES_ZK=true
vi /usr/local/hbase/conf/hbase-site.xml
内容：
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start-hbase.sh
hbase shell
2.hbase shell
2.1 创建表，添加元素
2.2查询
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2.3全表查询
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2.4表的状态
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2.5删除
hbase(main):021:0> deleteall 'person','jack'
0 row(s) in 0.1380 seconds
hbase(main):022:0> scan 'person'
ROW COLUMN+CELL
row1 column=address:home, timestamp=1485324730116, value=xian s
treet
row1 column=address:work, timestamp=1485324766972, value=shangh
ai street
row1 column=name:, timestamp=1485325047451, value=jack
row2 column=name:, timestamp=1485325244571, value=zjn
2 row(s) in 0.1600 seconds
hbase(main):023:0> deleteall 'person','row2'
0 row(s) in 0.0480 seconds
hbase(main):024:0> scan 'person'
ROW COLUMN+CELL
row1 column=address:home, timestamp=1485324730116, value=xian s
treet
row1 column=address:work, timestamp=1485324766972, value=shangh
ai street
row1 column=name:, timestamp=1485325047451, value=jack
1 row(s) in 0.1260 seconds
hbase(main):025:0> delete 'person','row1','name'
0 row(s) in 0.0490 seconds
hbase(main):026:0> scan 'person'
ROW COLUMN+CELL
row1 column=address:home, timestamp=1485324730116, value=xian s
treet
row1 column=address:work, timestamp=1485324766972, value=shangh
ai street
1 row(s) in 0.0970 seconds
hbase(main):027:0> disable 'person'
0 row(s) in 2.4530 seconds
hbase(main):028:0> drop 'person'
0 row(s) in 2.4570 seconds
hbase(main):029:0> list
TABLE
0 row(s) in 0.0340 seconds
=> []
3 java api 操作hbase
'''
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.;
import org.apache.hadoop.hbase.client.;
import java.io.IOException;
public class Hbase_base {
public static Configuration configuration;
public static Connection connection;
public static Admin admin;
//主函数中的语句请逐句执行，只需删除其前的//即可，如：执行insertRow时请将其他语句注释
public static void main(String[] args)throws IOException{
//创建一个表，表名为Score，列族为sname,course
createTable("Score",new String[]{"sname","course"});
//在Score表中插入一条数据，其行键为95001,sname为Mary（因为sname列族下没有子列所以第四个参数为空）
//等价命令：put 'Score','95001','sname','Mary'
insertRow("Score", "95001", "sname", "", "Mary");
//在Score表中插入一条数据，其行键为95001,course:Math为88（course为列族，Math为course下的子列）
//等价命令：put 'Score','95001','score:Math','88'
insertRow("Score", "95001", "course", "Math", "88");
//在Score表中插入一条数据，其行键为95001,course:English为85（course为列族，English为course下的子列）
//等价命令：put 'Score','95001','score:English','85'
insertRow("Score", "95001", "course", "English", "85");
//1、删除Score表中指定列数据，其行键为95001,列族为course，列为Math
//执行这句代码前请deleteRow方法的定义中，将删除指定列数据的代码取消注释注释，将删除制定列族的代码注释
//等价命令：delete 'Score','95001','score:Math'
//deleteRow("Score", "95001", "course", "Math");
//2、删除Score表中指定列族数据，其行键为95001,列族为course（95001的Math和English的值都会被删除）
//执行这句代码前请deleteRow方法的定义中，将删除指定列数据的代码注释，将删除制定列族的代码取消注释
//等价命令：delete 'Score','95001','score'
//deleteRow("Score", "95001", "course", "");
//3、删除Score表中指定行数据，其行键为95001
//执行这句代码前请deleteRow方法的定义中，将删除指定列数据的代码注释，以及将删除制定列族的代码注释
//等价命令：deleteall 'Score','95001'
//deleteRow("Score", "95001", "", "");
//查询Score表中，行键为95001，列族为course，列为Math的值
getData("Score", "95001", "course", "Math");
//查询Score表中，行键为95001，列族为sname的值（因为sname列族下没有子列所以第四个参数为空）
//getData("Score", "95001", "sname", "");
//删除Score表
//deleteTable("Score");
}
//建立连接
public static void init(){
configuration = HBaseConfiguration.create();
configuration.set("hbase.rootdir","hdfs://localhost:9000/hbase");
try{
connection = ConnectionFactory.createConnection(configuration);
admin = connection.getAdmin();
}catch (IOException e){
e.printStackTrace();
}
}
//关闭连接
public static void close(){
try{
if(admin != null){
admin.close();
}
if(null != connection){
connection.close();
}
}catch (IOException e){
e.printStackTrace();
}
}
/**
* 建表。HBase的表中会有一个系统默认的属性作为主键，主键无需自行创建，默认为put命令操作中表名后第一个数据，因此此处无需创建id列
* @param myTableName 表名
* @param colFamily 列族名
* @throws IOException
*/
public static void createTable(String myTableName,String[] colFamily) throws IOException {
init();
TableName tableName = TableName.valueOf(myTableName);
if(admin.tableExists(tableName)){
System.out.println("talbe is exists!");
}else {
HTableDescriptor hTableDescriptor = new HTableDescriptor(tableName);
for(String str:colFamily){
HColumnDescriptor hColumnDescriptor = new HColumnDescriptor(str);
hTableDescriptor.addFamily(hColumnDescriptor);
}
admin.createTable(hTableDescriptor);
System.out.println("create table success");
}
close();
}
/**
* 删除指定表
* @param tableName 表名
* @throws IOException
*/
public static void deleteTable(String tableName) throws IOException {
init();
TableName tn = TableName.valueOf(tableName);
if (admin.tableExists(tn)) {
admin.disableTable(tn);
admin.deleteTable(tn);
}
close();
}
/**
* 查看已有表
* @throws IOException
*/
public static void listTables() throws IOException {
init();
HTableDescriptor hTableDescriptors[] = admin.listTables();
for(HTableDescriptor hTableDescriptor :hTableDescriptors){
System.out.println(hTableDescriptor.getNameAsString());
}
close();
}
/**
* 向某一行的某一列插入数据
* @param tableName 表名
* @param rowKey 行键
* @param colFamily 列族名
* @param col 列名（如果其列族下没有子列，此参数可为空）
* @param val 值
* @throws IOException
*/
public static void insertRow(String tableName,String rowKey,String colFamily,String col,String val) throws IOException {
init();
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();
close();
}
/**
* 删除数据
* @param tableName 表名
* @param rowKey 行键
* @param colFamily 列族名
* @param col 列名
* @throws IOException
*/
public static void deleteRow(String tableName,String rowKey,String colFamily,String col) throws IOException {
init();
Table table = connection.getTable(TableName.valueOf(tableName));
Delete delete = new Delete(rowKey.getBytes());
//删除指定列族的所有数据
//delete.addFamily(colFamily.getBytes());
//删除指定列的数据
//delete.addColumn(colFamily.getBytes(), col.getBytes());
table.delete(delete);
table.close();
close();
}
/**
* 根据行键rowkey查找数据
* @param tableName 表名
* @param rowKey 行键
* @param colFamily 列族名
* @param col 列名
* @throws IOException
*/
public static void getData(String tableName,String rowKey,String colFamily,String col)throws IOException{
init();
Table table = connection.getTable(TableName.valueOf(tableName));
Get get = new Get(rowKey.getBytes());
get.addColumn(colFamily.getBytes(),col.getBytes());
Result result = table.get(get);
showCell(result);
table.close();
close();
}
/**
* 格式化输出
* @param result
*/
public static void showCell(Result result){
Cell[] cells = result.rawCells();
for(Cell cell:cells){
System.out.println("RowName:"+new String(CellUtil.cloneRow(cell))+" ");
System.out.println("Timetamp:"+cell.getTimestamp()+" ");
System.out.println("column Family:"+new String(CellUtil.cloneFamily(cell))+" ");
System.out.println("row Name:"+new String(CellUtil.cloneQualifier(cell))+" ");
System.out.println("value:"+new String(CellUtil.cloneValue(cell))+" ");
}
}
}
'''
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