/*
* 刪除RowKey所有行
* 非空判斷√
*/
public static void deleteRows(String tablename,String RowKey){
HTable h=null;
HBaseAdmin ha=null;
Get get=new Get(Bytes.toBytes(RowKey));
try{
ha=new HBaseAdmin(config);
if(ha.tableExists(tablename)){
h=new HTable(config,tablename);
Delete d=new Delete(Bytes.toBytes(RowKey));
if(h.exists(get)){
h.delete(d);
System.out.println("刪除成功");
}else{
System.out.println("滾犢子!!!");
}
}else{
System.out.println("表呢？你的表那！！");
}
}catch(Exception e){
e.printStackTrace();
}finally{
try {
h.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/*
* 刪除指定一行的數據
*
*/
public static void deleteRow(String tablename,String RowKey,String family,String qualifier){
HTable h=null;
try {
h=new HTable(config,tablename);
Delete d=new Delete(Bytes.toBytes(RowKey));
d.deleteColumn(Bytes.toBytes(family), Bytes.toBytes(qualifier));
h.delete(d);
System.out.println("刪除成功!");
} catch (IOException e) {
e.printStackTrace();
}finally{
try {
h.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/*
* 按條件查詢（應用filter）
*/
@SuppressWarnings("deprecation")
public static void GetByParam(String tablename,String Family,String qualifier,String value){
HTable h=null;
ResultScanner rs=null;
try {
h=new HTable(config,tablename);
Filter f=new SingleColumnValueFilter(Bytes.toBytes(Family),Bytes.toBytes(qualifier),CompareOp.EQUAL,Bytes.toBytes(value) );
Scan scan=new Scan();
scan.setFilter(f);
scan.addColumn(Bytes.toBytes(Family),Bytes.toBytes(qualifier));
rs=h.getScanner(scan);
System.out.println("行 列簇 列名 值 時間戳");
for (Result r : rs) {
for (KeyValue kv : r.raw()) {
System.out.println(kv.getRowOffset()+" "+Family+" "+qualifier+" "+new String(kv.getValue())+" "+ kv.getTimestamp());
}
}
} catch (IOException e) {
e.printStackTrace();
}finally{
try{
rs.close();
h.close();
}catch(Exception e){
e.printStackTrace();
}
}
}
/*
* 按條件查詢value
* 參數：表名，行，列簇，列名
*/
public static void get(String tablename,String rowKey,String Family,String qualifier)throws Exception{
HConnection connection = HConnectionManager.createConnection(config);
HTableInterface table = connection.getTable(TableName.valueOf(tablename));
try {
System.out.println("開始獲取------嗶嗶嗶");
Get get=new Get(rowKey.getBytes());
get.addColumn(Family.getBytes(), qualifier.getBytes());
Result r=table.get(get);
for(KeyValue kv:r.raw())
{
System.out.println("您要查的值爲"+new String(kv.getValue()));
}
} finally {
table.close();
connection.close();
}
}
