为啥SQLException会空指针异常，而改成Exception就好了

Question

public long insert(String sql, Object... args) {

long id = 0;

    Connection connection = null;
    PreparedStatement preparedStatement = null;
    ResultSet resultSet = null;

    try{
        connection = ConnectionContext.getInstance().get();
        //connection=JDBCUtils.getConnection();
        preparedStatement = connection.prepareStatement(sql, Statement.RETURN_GENERATED_KEYS);
        if(args != null){
            for(int i = 0; i < args.length; i++){
                preparedStatement.setObject(i + 1, args[i]);
            }
        }
        preparedStatement.executeUpdate();

        resultSet=preparedStatement.getGeneratedKeys();
        if(resultSet.next()){
            id=resultSet.getLong(1);
        }
    }catch(Exception e)
    {
        e.printStackTrace();

    }finally{
        JDBCUtils.release(resultSet,preparedStatement);
    }
    return id;
}

Answer 1

因为SQLException只能捕获sql方面产生的问题，而空指针一次不是在sqlexcotion下面，所以会报空指针异常，Exception可以捕获所有的异常，所以能捕获空指针，所有的异常捕获的接口和类都要继承或实现Exception