Perl类、CGI和DBI编程
发布时间:2020-12-15 20:58:30 所属栏目:大数据 来源:网络整理
导读:方法是一种属于类的特殊子例程,要求第一个参数必须是包含或指向对象的引用,并且这个参数是由perl自动隐式赋值的。 House.pm package House;sub new{my $class=shift;my $ref={};bless($ref,$class);return $ref;}sub set_data{my $self=shift;my $key=shif
方法是一种属于类的特殊子例程,要求第一个参数必须是包含或指向对象的引用,并且这个参数是由perl自动隐式赋值的。 House.pm package House; sub new{ my $class=shift; my $ref={}; bless($ref,$class); return $ref; } sub set_data{ my $self=shift; my $key=shift; my $value=shift; $self->{$key}=$value; } sub get_data{ my $self=shift; my $key=shift; $self->{$key}; } 1; 同目录下建立Perl文件useHouse #!/usr/bin/perl use 5.010; ##say相当于print外加换行符,但必须申明使用Perl5.1的新特征 require ("House.pm"); ##引入外部文件 my $house=new House("Bieshu"); say ref($house); ##ref函数返回类名--House $house->set_data("name","balihaoting"); say $house->get_data("name"); 在Apache服务目录下有个htdocs,用来存放html文件,form.html <html> <head><title>CGI Form</title></head> <bod> <form action="cgi-bin/form" method=get> Name:<br> <input type="text" size=25 name="name"><br> Phone:<br> <input type="text" size=25 name="phone"><br> <input type=submit value="Submit"> <input type=reset value="Clear"> </form> </body> </html> cgi-bin目录下用来存放脚本文件,form #!/usr/bin/perl print "Content-type:text/htmlnn"; @key_value=split(/&/,$ENV{QUERY_STRING}); foreach $pair (@key_value){ $pair=~tr/+/ /; ($key,$value)=split(/=/,$pair); print "t$key:$value<br>"; } 下面给一个在同一个perl程序中显示页面和处理响应的例子: #!/usr/bin/perl use CGI qw(:standard); print header("text/html;charset=gb2312"); print start_html(-title=>'Function-Oriented Syntax',-bgcolor=>'silver'); print h1("Let's hear from you!"),h2("I'm intersted."),start_form,"what's your name?",textfield('Name'),p,"what's you occupation?",textfield('Job'),"select a vacation spot.",popup_menu( -name=>'Place',-value=>['Hawaii','Europe','Mexico','Japan'],),"Do you want a green balloon?",br,checkbox(-name=>"Choice",-label=>'If yes,check this box'),submit("Submit"),end_form; print hr; if(param()){ print "Your name is ",em(param('Name')),"Your occupation is ",em(param('Job')),"Your vacation spot is ",em(param('Place')),p; if(param('Choice') eq "on"){ print "You will receive a green balloon shortly!"; } print hr; } print end_html; DBI编程示例: #!/usr/bin/perl use DBI qw/:sql_types/; my $dbh=DBI->connect('dbi:mysql:mysql','root','passwd',{ PrintError=>0,RaiseError=>1,AutoCommit=>0,} )or die "Connect failed:$DGI::errstr"; my @rows=( ['zcy',3,4],['orisun',34,5],['zsir',4,1] ); my $sql=qq{INSERT INTO tb_sample VALUES(?,?,?)}; my $sth=$dbh->prepare($sql); foreach $param (@rows){ eval{$sth->bind_param(1,$param->[0],SQL_VARCHAR); $sth->bind_param(2,$param->[1],SQL_INTEGER); $sth->bind_param(3,$param->[2],SQL_INTEGER); $sth->execute() or die "Insert data failed:$DBI::errstr."; }; } if($@){ ##如果eval执行失败,则$@为true warn "database error:$DBI::errstrn"; $dbh->rollback(); } else{ $dbh->commit(); my $name='zcy'; $name=$dbh->quote($name); ##处理引号 $sth=$dbh->prepare("select * from tb_sample where name=$name"); $sth->execute(); # $sth->dump_results(); ##直接全部输出查询结果 while(my $row=$sth->fetchrow_hashref()){ print "Name=$row->{name}t"; print "Height=$row->{height}t"; print "Weight=$row->{weight}n"; } } $sth->finish(); $dbh->disconnect(); (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |