Spring Rdbms操作（二）——SqlFunction 获取表数据条数

SqlFunction：获取单行结果集。默认返回int。

import javax.sql.DataSource;
import org.springframework.jdbc.object.SqlFunction;

public class TestSFunction {

    public TestSFunction() {
        // TODO Auto-generated constructor stub
    }

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        TestSFunction tsFunction = new TestSFunction();
        int res = tsFunction.countRows();
        System.out.println(res);
    }
    
    public int countRows(){
        Get_cmd_log cmd_log = new Get_cmd_log();
        DataSource datasource = cmd_log.getDataSource();
        SqlFunction sqlFunction = new SqlFunction(datasource,"select count(*) from zm_test_sjdbc");
        sqlFunction.compile();
        return sqlFunction.run();
    }
}

应用场景：

获取满足条件下的结果条数。

如表总数，某种状态下数据条数。