hbase 1.x 增删改查，建表、删表等

你的名字 2022-07-15 00:26 121阅读 0赞

本文转载自：[http://blog.csdn.net/rkjava/article/details/48789683][http_blog.csdn.net_rkjava_article_details_48789683]

import org.apache.hadoop.conf.Configuration;  
    import org.apache.hadoop.hbase.*;  
    import org.apache.hadoop.hbase.client.*;  
    import org.apache.hadoop.hbase.util.Bytes;  
      
    import java.io.IOException;  
      
    /** 
     * Created by xuemin on 15/9/28. 
     */  
    public class HBaseTest {  
      
      
        public static Configuration configuration;  
        public static Connection connection;  
        public static Admin admin;  
      
      
        public static void main(String[] args) throws IOException {  
            createTable("t2",new String[]{"cf1","cf2"});  
            insterRow("t2", "rw1", "cf1", "q1", "val1");  
            getData("t2", "rw1", "cf1", "q1");  
            scanData("t2", "rw1", "rw2");  
            deleRow("t2","rw1","cf1","q1");  
            deleteTable("t2");  
        }  
      
        //初始化链接  
        public static void init(){  
            configuration = HBaseConfiguration.create();  
            configuration.set("hbase.zookeeper.quorum","10.10.3.181,10.10.3.182,10.10.3.183");  
            configuration.set("hbase.zookeeper.property.clientPort","2181");  
            configuration.set("zookeeper.znode.parent","/hbase");  
      
            try {  
                connection = ConnectionFactory.createConnection(configuration);  
                admin = connection.getAdmin();  
            } catch (IOException e) {  
                e.printStackTrace();  
            }  
        }  
      
        //关闭连接  
        public static  void close(){  
            try {  
                if(null != admin)  
                    admin.close();  
                if(null != connection)  
                    connection.close();  
            } catch (IOException e) {  
                e.printStackTrace();  
            }  
      
        }  
      
        //建表  
        public static void createTable(String tableNmae,String[] cols) throws IOException {  
      
            init();  
            TableName tableName = TableName.valueOf(tableNmae);  
      
            if(admin.tableExists(tableName)){  
                System.out.println("talbe is exists!");  
            }else {  
                HTableDescriptor hTableDescriptor = new HTableDescriptor(tableName);  
                for(String col:cols){  
                    HColumnDescriptor hColumnDescriptor = new HColumnDescriptor(col);  
                    hTableDescriptor.addFamily(hColumnDescriptor);  
                }  
                admin.createTable(hTableDescriptor);  
            }  
            close();  
        }  
      
        //删表  
        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  
        public static void listTables() throws IOException {  
            init();  
            HTableDescriptor hTableDescriptors[] = admin.listTables();  
            for(HTableDescriptor hTableDescriptor :hTableDescriptors){  
                System.out.println(hTableDescriptor.getNameAsString());  
            }  
            close();  
        }  
      
        //插入数据  
        public static void insterRow(String tableName,String rowkey,String colFamily,String col,String val) throws IOException {  
            init();  
            Table table = connection.getTable(TableName.valueOf(tableName));  
            Put put = new Put(Bytes.toBytes(rowkey));  
            put.addColumn(Bytes.toBytes(colFamily), Bytes.toBytes(col), Bytes.toBytes(val));  
            table.put(put);  
      
            //批量插入  
           /* List<Put> putList = new ArrayList<Put>(); 
            puts.add(put); 
            table.put(putList);*/  
            table.close();  
            close();  
        }  
      
        //删除数据  
        public static void deleRow(String tableName,String rowkey,String colFamily,String col) throws IOException {  
            init();  
            Table table = connection.getTable(TableName.valueOf(tableName));  
            Delete delete = new Delete(Bytes.toBytes(rowkey));  
            //删除指定列族  
            //delete.addFamily(Bytes.toBytes(colFamily));  
            //删除指定列  
            //delete.addColumn(Bytes.toBytes(colFamily),Bytes.toBytes(col));  
            table.delete(delete);  
            //批量删除  
           /* List<Delete> deleteList = new ArrayList<Delete>(); 
            deleteList.add(delete); 
            table.delete(deleteList);*/  
            table.close();  
            close();  
        }  
      
        //根据rowkey查找数据  
        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(Bytes.toBytes(rowkey));  
            //获取指定列族数据  
            //get.addFamily(Bytes.toBytes(colFamily));  
            //获取指定列数据  
            //get.addColumn(Bytes.toBytes(colFamily),Bytes.toBytes(col));  
            Result result = table.get(get);  
      
            showCell(result);  
            table.close();  
            close();  
        }  
      
        //格式化输出  
        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))+" ");  
            }  
        }  
      
        //批量查找数据  
        public static void scanData(String tableName,String startRow,String stopRow)throws IOException{  
            init();  
            Table table = connection.getTable(TableName.valueOf(tableName));  
            Scan scan = new Scan();  
            //scan.setStartRow(Bytes.toBytes(startRow));  
            //scan.setStopRow(Bytes.toBytes(stopRow));  
            ResultScanner resultScanner = table.getScanner(scan);  
            for(Result result : resultScanner){  
                showCell(result);  
            }  
            table.close();  
            close();  
        }  
    }

[http_blog.csdn.net_rkjava_article_details_48789683]: http://blog.csdn.net/rkjava/article/details/48789683#