JDBC对MySQL数据库布尔字段的操作方法

class testGo { 
 public static void IsReg(String username, String openid) { 
  Connection con = new Dbcon().getCon(); 
  ResultSet rs = null; 
  String sql = null; 
 
  try { 
    
   sql = "select * from A where id=1"; 
   rs = con.prepareStatement(sql).executeQuery(); 
   while (rs.next()) { 
    System.out.println(rs.getBoolean("enabled")); 
   } 
    
   sql="update A set enabled=true where id=1"; 
   con.createStatement().execute(sql); 
    
   sql = "select * from A where id=1"; 
   rs = con.prepareStatement(sql).executeQuery(); 
   while (rs.next()) { 
    System.out.println(rs.getBoolean("enabled")); 
   } 
    
   con.close(); 
  } catch (Exception e) { 
   e.printStackTrace(); 
  } 
 } 
}