使用JDBC获取select count(*) from table_name

public int getCount() {
int count = 0;
PreparedStatement ps = null;
        ResultSet rs = null;
        String sql = "select count(*) from table_name";
        try {
         con=this.getConnection();
         if (con!=null) {
ps=con.prepareStatement(sql);
rs=ps.executeQuery();
if(rs.next()) {
count=rs.getInt(1);
System.out.println("count:"+count);
}
}
        } catch (Exception e) {

// TODO: handle exception
}
     return count;
} 阅读更多