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HBase基本代码实现（一）

2017-06-16 18:47 204 查看

Step 1: 加载设置

HConnection hTablePool = null;
static Configuration conf =null;
public HBaseDAOImp()
{
conf = new Configuration();
String zk_list = "node12,node13,node14";
conf.set("hbase.zookeeper.quorum", zk_list);
try {
hTablePool = HConnectionManager.createConnection(conf) ;
} catch (IOException e) {
e.printStackTrace();
}
}

Step 2：

public void save(Put put, String tableName) {
// TODO Auto-generated method stub
HTableInterface table = null;
try {
table = hTablePool.getTable(tableName) ;
table.put(put) ;

} catch (Exception e) {
e.printStackTrace() ;
}finally{
try {
table.close() ;
} catch (IOException e) {
e.printStackTrace();
}
}
}

Step 3：

/**
* 插入一个cell
* @param tableName
* @param rowKey
* @param family
* @param quailifer
* @param value
*/
public void insert(String tableName, String rowKey, String family,
String quailifer, String value) {
// TODO Auto-generated method stub
HTableInterface table = null;
try {
table = hTablePool.getTable(tableName) ;
Put put = new Put(rowKey.getBytes());
put.add(family.getBytes(), quailifer.getBytes(), value.getBytes()) ;
table.put(put);
} catch (Exception e) {
e.printStackTrace();
}finally
{
try {
table.close() ;
} catch (IOException e) {
e.printStackTrace();
}
}
}

Step 4：

/**
* 在一个列族下插入多个单元格
* @param tableName
* @param rowKey
* @param family
* @param quailifer
* @param value
*/
public void insert(String tableName,String rowKey,String family,String quailifer[],String value[])
{
HTableInterface table = null;
try {
table = hTablePool.getTable(tableName) ;
Put put = new Put(rowKey.getBytes());
// 批量添加
for (int i = 0; i < quailifer.length; i++) {
String col = quailifer[i];
String val = value[i];
put.add(family.getBytes(), col.getBytes(), val.getBytes());
}
table.put(put);
} catch (Exception e) {
e.printStackTrace();
}finally
{
try {
table.close() ;
} catch (IOException e) {
e.printStackTrace();
}
}
}

Step 5：

public void save(List<Put> Put, String tableName) {
// TODO Auto-generated method stub
HTableInterface table = null;
try {
table = hTablePool.getTable(tableName) ;
table.put(Put) ;
}
catch (Exception e) {
// TODO: handle exception
}finally
{
try {
table.close() ;
} catch (IOException e) {
e.printStackTrace();
}
}

}

Step 6：

public Result getOneRow(String tableName, String rowKey) {
// TODO Auto-generated method stub
HTableInterface table = null;
Result rsResult = null;
try {
table = hTablePool.getTable(tableName) ;
Get get = new Get(rowKey.getBytes()) ;
rsResult = table.get(get) ;
} catch (Exception e) {
e.printStackTrace() ;
}
finally
{
try {
table.close() ;
} catch (IOException e) {
e.printStackTrace();
}
}
return rsResult;
}

Step 7：

/**
* 最常用的方法，优化查询
* 查询一行数据，
* @param tableName
* @param rowKey
* @param cols
* @return
*/
public Result getOneRowAndMultiColumn(String tableName, String rowKey,String[] cols) {
// TODO Auto-generated method stub
HTableInterface table = null;
Result rsResult = null;
try {
table = hTablePool.getTable(tableName) ;
Get get = new Get(rowKey.getBytes()) ;
for (int i = 0; i < cols.length; i++) {
get.addColumn("cf".getBytes(), cols[i].getBytes()) ;
}
rsResult = table.get(get) ;
} catch (Exception e) {
e.printStackTrace() ;
}
finally
{
try {
table.close() ;
} catch (IOException e) {
e.printStackTrace();
}
}
return rsResult;
}

Step 8：

public List<Result> getRows(String tableName, String rowKeyLike) {
// TODO Auto-generated method stub
HTableInterface table = null;
List<Result> list = null;
try {
FilterList fl = new FilterList(FilterList.Operator.MUST_PASS_ALL);
table = hTablePool.getTable(tableName) ;
PrefixFilter filter = new PrefixFilter(rowKeyLike.getBytes());
SingleColumnValueFilter filter1 = new SingleColumnValueFilter(
"order".getBytes(),
"order_type".getBytes(),
CompareOp.EQUAL,
Bytes.toBytes("1")
);
fl.addFilter(filter);
fl.addFilter(filter1);
Scan scan = new Scan();
scan.setFilter(fl);
ResultScanner scanner = table.getScanner(scan) ;
list = new ArrayList<Result>() ;
for (Result rs : scanner) {
list.add(rs) ;
}
} catch (Exception e) {
e.printStackTrace() ;
}
finally
{
try {
table.close() ;
} catch (IOException e) {
e.printStackTrace();
}
}
return list;
}

Step 9：

public List<Result> getRows(String tableName, String rowKeyLike ,String cols[]) {
// TODO Auto-generated method stub
HTableInterface table = null;
List<Result> list = null;
try {
table = hTablePool.getTable(tableName) ;
PrefixFilter filter = new PrefixFilter(rowKeyLike.getBytes());

Scan scan = new Scan();
for (int i = 0; i < cols.length; i++) {
scan.addColumn("cf".getBytes(), cols[i].getBytes()) ;
}
scan.setFilter(filter);
ResultScanner scanner = table.getScanner(scan) ;
list = new ArrayList<Result>() ;
for (Result rs : scanner) {
list.add(rs) ;
}
} catch (Exception e) {
e.printStackTrace() ;
}
finally
{
try {
table.close() ;
} catch (IOException e) {
e.printStackTrace();
}
}
return list;
}

Step 10：

public List<Result> getRowsByOneKey(String tableName, String rowKeyLike ,String cols[]) {
// TODO Auto-generated method stub
HTableInterface table = null;
List<Result> list = null;
try {
table = hTablePool.getTable(tableName) ;
PrefixFilter filter = new PrefixFilter(rowKeyLike.getBytes());

Scan scan = new Scan();
for (int i = 0; i < cols.length; i++) {
scan.addColumn("cf".getBytes(), cols[i].getBytes()) ;
}
scan.setFilter(filter);
ResultScanner scanner = table.getScanner(scan) ;
list = new ArrayList<Result>() ;
for (Result rs : scanner) {
list.add(rs) ;
}
} catch (Exception e) {
e.printStackTrace() ;
}
finally
{
try {
table.close() ;
} catch (IOException e) {
e.printStackTrace();
}
}
return list;
}

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标签： hbase string 基本代码

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