perl encode_json 会产生 UTF-8 (binary) string decode_json 需要一个 UTF-8 (binary) string

encode_json

    $json_text = encode_json $perl_scalar
Converts the given Perl data structure to a UTF-8 encoded, binary string.

This function call is functionally identical to:

    $json_text = JSON->new->utf8->encode($perl_scalar)

  转换给定的perl数据结构到一个UTF-8编码的,2进制的字符串。

 encode_json 产生一个UTF-8编码的2进制字符

[root@wx03 ~]# cat a15.pl
use JSON qw/encode_json decode_json/ ;
use Encode;
my $data = [
     {
         'name' => 'Ken' ,
         'age' => 19
     },
     {
         'name' => '测试' ,
         'age' => 25
     }
];
my $json_out = encode_json ( $data );
print $json_out;
print "\n";

my $d=decode_utf8($json_out);
print $d;
print "\n";

[root@wx03 ~]# perl a15.pl
[{"age":19,"name":"Ken"},{"age":25,"name":"测试"}]
[{"age":19,"name":"Ken"},{"age":25,"name":"测试"}]

encode_json 会产生一个utf-8的2进制格式

  decode_json

    $perl_scalar = decode_json $json_text
The opposite of encode_json: expects an UTF-8 (binary) string and tries to parse that as an UTF-8 encoded JSON text, returning the resulting reference.

This function call is functionally identical to:

    $perl_scalar = JSON->new->utf8->decode($json_text)

    与encode-接送相反,期望一个UTF-8(2进制)字符串尝试解析一个 UTF-8编码的JSON 文本,

    返回一个结果引用。

  decode_json 必须是unicode形式的字符,是一个UTF-8的2进制字符串

  [root@wx03 ~]# cat a14.pl
use Net::SMTP;
use LWP::UserAgent;
use HTTP::Cookies;
use HTTP::Headers;
use HTTP::Response;
use Encode;
use JSON;
use File::Temp qw/tempfile/;
use HTTP::Date qw(time2iso str2time time2iso time2isoz);
use Data::Dumper;
my $CurrTime = time2iso(time());
my $dis_mainpublish='中均资本';
my $ua = LWP::UserAgent->new;
$ua->timeout(10);
$ua->env_proxy;
my $now          = time();
$ua->agent('Mozilla/5.0');
my $cookie_jar = HTTP::Cookies->new(

    file           => 'lwp_cookies.txt',
    autosave       => 1,
    ignore_discard => 1
);
$ua->cookie_jar($cookie_jar);
my $response = $ua->get("https://www.zjcap.cn/web/noauth?method=%2Fproduct%2Flist&duration=&entryUnit=&productType=1&status=&yield=&productName=&pageNum=1&pageSize=6&_=1468156037154");

if ($response->is_success) {
  $r = $response->decoded_content;
  print "\n";
  }
  else
  {
  die $response->status_line;
  };

my $r=encode_utf8($r);
my $hash = decode_json ( $r );
print "11111111111111111111\n";
#print Dumper($hash);
print "产品列表\n";
print $hash->{data}->{dataList}->[0]->{name};
[root@wx03 ~]# perl a14.pl 

11111111111111111111
产品列表
中均-欧洲杯18号（葡萄牙加时/点球夺冠）[root@wx03 ~]#