java api操作 hbase

/**
* @(#)HbaseTest.java 1.0 2017年7月19日
* @Copyright: Copyright 2007 - 2017 MPR Tech. Co. Ltd. All Rights Reserved.
* @Description:
*
* Modification History:
* Date: 2017年7月19日
* Author: liuwei
* Version: 1.0.0.0
* Description: (Initialize)
* Reviewer:
* Review Date:
*/
package com.hbase.hbasetest;

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.HTableDescriptor;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.hbase.client.Get;
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.client.Table;
import org.apache.hadoop.hbase.filter.CompareFilter.CompareOp;
import org.apache.hadoop.hbase.filter.FilterList;
import org.apache.hadoop.hbase.util.Bytes;

public class HbaseTest {

public static Configuration configuration;

public static Connection connection;  

public static Admin admin;  


/** 
 * 初始化链接 
 */  
public static void init() {  
    configuration = HBaseConfiguration.create();  
    configuration.set("hbase.zookeeper.property.clientPort", "2181");  
    configuration.set("hbase.zookeeper.quorum", "172.16.5.125,172.16.5.126,172.16.5.127");  

    try {  
        connection = ConnectionFactory.createConnection(configuration);  
        admin = connection.getAdmin();  
        System.out.println("链接-----");
    } 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();  
    }  
}  

 /** 
 * 创建表 
 *  
 * @param tableName 表名 
 * @param family 列族列表 
 * @throws IOException 
 */  
public static void createTable(String tableName, String[] cols) throws IOException {  
    init();  
    TableName tName = TableName.valueOf(tableName);  
    if (admin.tableExists(tName)) {  
        println(tableName + " exists.");  
    } else {  
        HTableDescriptor hTableDesc = new HTableDescriptor(tName);  
        for (String col : cols) {  
            HColumnDescriptor hColumnDesc = new HColumnDescriptor(col);  
            hTableDesc.addFamily(hColumnDesc);  
        }  
        admin.createTable(hTableDesc);  
    }  

    close();  
}  

/** 
 * 删除表 
 *  
 * @param tableName 表名称 
 * @throws IOException 
 */  
public static void deleteTable(String tableName) throws IOException {  
    init();  
    TableName tName = TableName.valueOf(tableName);  
    if (admin.tableExists(tName)) {  
        admin.disableTable(tName);  
        admin.deleteTable(tName);  
    } else {  
        println(tableName + " not exists.");  
    }  
    close();  
}  

/**
 * 查看已有的表
 * @throws IOException 
 */
public static void listTables() throws IOException{
    init();
    HTableDescriptor hTableDescriptor[]=admin.listTables();
    for(HTableDescriptor h:hTableDescriptor){
        System.out.println(h.getNameAsString());
    }
    close();


}




public static void delete(String tableName, String rowKey, String colFamily, String col) throws IOException {  
    init();  

    if (!admin.tableExists(TableName.valueOf(tableName))) {  
        println(tableName + " not exists.");  
    } else {  
        Table table = connection.getTable(TableName.valueOf(tableName));  
        Delete del = new Delete(Bytes.toBytes(rowKey));  
        if (colFamily != null) {  
            del.addFamily(Bytes.toBytes(colFamily));  
        }  
        if (colFamily != null && col != null) {  
            del.addColumn(Bytes.toBytes(colFamily), Bytes.toBytes(col));  
        }  
        /* 
         * 批量删除 List deleteList = new ArrayList(); deleteList.add(delete); table.delete(deleteList); 
         */  
        table.delete(del);  
        table.close();  
    }  
    close();  
} 

public static void main(String[] args) throws IOException {
    //listTables();
    //getData("reading", "095|1383741390291|2017-07-14 16:30:28.308|201510191634114768|632", null, null);
    scan("reading");
}

/** 
 * 根据RowKey获取数据 
 *  
 * @param tableName 表名称 
 * @param rowKey RowKey名称 
 * @param colFamily 列族名称 
 * @param col 列名称 
 * @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(Bytes.toBytes(rowKey));  
    if (colFamily != null) {  
        get.addFamily(Bytes.toBytes(colFamily));  
    }  
    if (colFamily != null && col != null) {  
        get.addColumn(Bytes.toBytes(colFamily), Bytes.toBytes(col));  
    }  
    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.print("RowName: " + new String(CellUtil.cloneRow(cell)) + " ");  
        System.out.print("column Family: " + new String(CellUtil.cloneFamily(cell)) + " ");  
        System.out.print("row Name: " + new String(CellUtil.cloneQualifier(cell)) + " ");  
        System.out.print("value: " + new String(CellUtil.cloneValue(cell)) + " "); 
        System.out.println("");
    }  
}  

/**
全表扫描
*/
public static void scan(String tableName) throws IOException{
init();
Table table = connection.getTable(TableName.valueOf(tableName));
Scan scan = new Scan();
ResultScanner scanner = table.getScanner(scan);
for(Result re:scanner){
showCell(re);
System.out.println(“———————————————-“);
}

    close();
}

/**
* 插入单行
*
* @param tableName 表名称
* @param rowKey RowKey
* @param colFamily 列族
* @param col 列
* @param value 值
* @throws IOException
*/
public static void insert(String tableName, String rowKey, String colFamily, String col, String value) 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(value));
table.put(put);

    /* 
     * 批量插入 List putList = new ArrayList(); puts.add(put); table.put(putList); 
     */  

    table.close();  
    close();  
}  

}