怎样将mysql的数据导入hbase？

mysql的数据比较多，只想导入一部分，sqoop导入是不是不能自由设定行键？
java程序怎么导入呢？

sqoop可以选择一部分导入：7.2.2. Selecting the Data to Import
Sqoop typically imports data in a table-centric fashion. Use the --table argument to select the table to import. For example, --table employees. This argument can also identify a VIEW or other table-like entity in a database.

By default, all columns within a table are selected for import. Imported data is written to HDFS in its "natural order;" that is, a table containing columns A, B, and C result in an import of data such as:

A1,B1,C1
A2,B2,C2
...
You can select a subset of columns and control their ordering by using the --columns argument. This should include a comma-delimited list of columns to import. For example: --columns "name,employee_id,jobtitle".

You can control which rows are imported by adding a SQL WHERE clause to the import statement. By default, Sqoop generates statements of the form SELECT FROM . You can append a WHERE clause to this with the --where argument. For example: --where "id > 400". Only rows where the id column has a value greater than 400 will be imported.

By default sqoop will use query select min(), max() from

to find out boundaries for creating splits. In some cases this query is not the most optimal so you can specify any arbitrary query returning two numeric columns using --boundary-query argument.

url:http://archive.cloudera.com/cdh/3/sqoop/SqoopUserGuide.html#_selecting_the_data_to_import