• Hbase 的java 增删改查操作


    package cmcc.hbase.dao.impl;
    import java.io.IOException;
    
    import org.apache.hadoop.conf.Configuration;
    import org.apache.hadoop.hbase.Cell;
    import org.apache.hadoop.hbase.CellUtil;
    import org.apache.hadoop.hbase.HBaseConfiguration;
    import org.apache.hadoop.hbase.HColumnDescriptor;
    import org.apache.hadoop.hbase.HTableDescriptor;
    import org.apache.hadoop.hbase.MasterNotRunningException;
    import org.apache.hadoop.hbase.TableName;
    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 SimpleHBase {
    
     public static void main(String[] args) {
      Configuration configuration=HBaseConfiguration.create();
      String tableName="student";
      createTable(configuration, tableName);
    //  addData(configuration, tableName);
    //  getData(configuration, tableName);
    //  getAllData(configuration, tableName);
    //  deleteDate(configuration, tableName);
    //  dropTable(configuration, tableName);
      
     }
     
     /**
      * create a new Table
      * @param configuration Configuration
      * @param tableName String,the new Table's name
      * */
     public static void createTable(Configuration configuration,String tableName){
      HBaseAdmin admin;
      try {
       admin = new HBaseAdmin(configuration);
       if(admin.tableExists(tableName)){
        admin.disableTable(tableName);
        admin.deleteTable(tableName);
        System.out.println(tableName+"is exist ,delete ......");
       }
       
       
       HTableDescriptor tableDescriptor=new HTableDescriptor(TableName.valueOf(tableName));
       tableDescriptor.addFamily(new HColumnDescriptor("info"));
       tableDescriptor.addFamily(new HColumnDescriptor("address"));
       admin.createTable(tableDescriptor);
       System.out.println("end create table");
      } catch (MasterNotRunningException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
      } catch (ZooKeeperConnectionException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
      } catch (IOException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
      }
      
     }
     
     /**
      * Delete the existing table
      * @param configuration Configuration
      * @param tableName String,Table's name
      * */
     public static void dropTable(Configuration configuration,String tableName){
      HBaseAdmin admin;
      try {
       admin = new HBaseAdmin(configuration);
       if(admin.tableExists(tableName)){
        admin.disableTable(tableName);
        admin.deleteTable(tableName);
        System.out.println(tableName+"delete success!");
       }else{
        System.out.println(tableName+"Table does not exist!");
       }
      } catch (MasterNotRunningException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
      } catch (ZooKeeperConnectionException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
      } catch (IOException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
      }
     }
     
     /**
      * insert a data
      * @param configuration Configuration
      * @param tableName String,Table's name
      * */
     public static void addData(Configuration configuration,String tableName){
      HBaseAdmin admin;
      try {
       admin = new HBaseAdmin(configuration);
       if(admin.tableExists(tableName)){
        HTable table=new HTable(configuration, tableName);
        Put put=new Put(Bytes.toBytes("zhangsan"));
        put.add(Bytes.toBytes("info"), Bytes.toBytes("age"), Bytes.toBytes("28"));
        table.put(put);
        System.out.println("add success!");
       }else{
        System.out.println(tableName+"Table does not exist!");
       }
      } catch (MasterNotRunningException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
      } catch (ZooKeeperConnectionException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
      } catch (IOException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
      }
     }
     
     /**
      * Delete a data
      * @param configuration Configuration
      * @param tableName String,Table's name
      * */
     public static void deleteDate(Configuration configuration,String tableName){
      HBaseAdmin admin;
      try {
       admin=new HBaseAdmin(configuration);
       if(admin.tableExists(tableName)){
        HTable table=new HTable(configuration, tableName);
        Delete delete=new Delete(Bytes.toBytes("zhangsan"));
        table.delete(delete);
        System.out.println("delete success!");
       }else{
        System.out.println("Table does not exist!");
       }
      } catch (MasterNotRunningException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
      } catch (ZooKeeperConnectionException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
      } catch (IOException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
      }
     }
     
    
     /**
      * get a data
      * @param configuration Configuration
      * @param tableName String,Table's name
      * */
     public static void getData(Configuration configuration,String tableName){
      HTable table;
      try {
       table = new HTable(configuration, tableName);
       Get get=new Get(Bytes.toBytes("zhangsan"));
       Result result=table.get(get);
     
       for(Cell cell:result.rawCells()){   
        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))+" ");
       }
      } catch (IOException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
      }
     }
     
     /**
      * insert all data
      * @param configuration Configuration
      * @param tableName String,Table's name
      * */
     public static void getAllData(Configuration configuration,String tableName){
      HTable table;
      try {
       table=new HTable(configuration, tableName);
       Scan scan=new Scan();
       ResultScanner results=table.getScanner(scan);
       for(Result result:results){
        for(Cell cell:result.rawCells()){   
         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))+" ");
        }
       }
      } catch (IOException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
      }
        
     }
    }

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  • 原文地址:https://www.cnblogs.com/TendToBigData/p/10501304.html
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