如何使用Perl'；s XML:：SAX？

我正在尝试

XML:：SAX

解析器来解析XML文件。XML文件如下所示

            <message>
                <c1>
                    <rrcConnectionSetupComplete>
                        <rrc-TransactionIdentifier>2</rrc-TransactionIdentifier>
                        <criticalExtensions>
                            <c1>
                                <rrcConnectionSetupComplete-r8>
                                    <selectedPLMN-Identity> 1 </selectedPLMN-Identity>
                                    <dedicatedInfoNAS> 07410109014290112345671000028020000f0 </dedicatedInfoNAS>
                                </rrcConnectionSetupComplete-r8>
                            </c1>
                        </criticalExtensions>
                    </rrcConnectionSetupComplete>
                </c1>
            </message>

use strict;

use XML::SAX;
use MySAXHandler;

my $parser = XML::SAX::ParserFactory->parser(Handler => MySAXHandler->new);

$parser->parse_uri("uL-DCCH-Message.xml");

my $rrc_trans_identifier = $parser->{'c1'}->{'rrcConnectionSetupComplete'}->{'rrc-TransactionIdentifier'};
print "rrc_trans_id :: $rrc_trans_identifier\n";

my $selected_plmn_id = $parser->{c1}->{rrcConnectionSetupComplete}->{criticalExtensions}->{c1}->{'rrcConnectionSetupComplete-r8'}->{'selectedPLMN-Identity'};
print "plmn identity :: $selected_plmn_id\n";

my $rrc_dedicated_info_nas = $parser->{c1}->{rrcConnectionSetupComplete}->{criticalExtensions}->{c1}->{'rrcConnectionSetupComplete-r8'}->{dedicatedInfoNAS};
print "dedicated info nas :: $rrc_dedicated_info_nas\n";

当我运行这段代码时，我得到的输出是

Can't locate MySAXHandler.pm in @INC (@INC contains: /etc/perl /usr/local/lib/perl/5.10.0 /usr/local/share/perl/5.10.0 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.10 /usr/share/perl/5.10 /usr/local/lib/site_perl .) at sax.pl line 4.
BEGIN failed--compilation aborted at sax.pl line 4.

我从CPAN安装了XML:：SAX，但它仍然显示一些模块丢失错误

我的问题是,

是否需要安装其他模块

要访问XML文件中的值，我下面的过程是否正确

例如：

my $rrc_trans_identifier = $parser->{'c1'}->{'rrcConnectionSetupComplete'}->{'rrc-TransactionIdentifier'};
print "rrc_trans_id :: $rrc_trans_identifier\n";

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您需要编写自己的

myaxhandler

（线索在名称中！）

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有关更多详细信息，请参阅文档。

您可能想停下来学习一下Perl。似乎您所有的问题都与复制和粘贴代码示例有关，不了解它们的作用，然后在出现问题时立即询问。这不是一个成功的好策略。