java 如何组包发送？https

部分包如下：
GET https://p48-buy.itunes.apple.com/WebObjects/MZFinance.woa/wa/authenticate?attempt=0&why=signIn&guid=6bc0a5e8f60f0646f6c13e5c9ae9b3e7d464f3c6&password=w565656L&rmp=0&[email protected]&createSession=true&Pod=48&PRH=48 HTTP/1.1
Host: p48-buy.itunes.apple.com
User-Agent: iTunes-iPod/5.0.1 (4; 8GB)
Accept: */*
Accept-Language: zh-Hans;q=1.0,en;q=1.0,fr;q=0.9,de;q=0.9,ja;q=0.9,nl;q=0.9,it;q=0.8,es;q=0.8,pt;q=0.8,pt-PT;q=0.7,da;q=0.7,fi;q=0.7,nb;q=0.7,sv;q=0.6,ko;q=0.6,zh-Hant;q=0.6,ru;q=0.5,pl;q=0.5,tr;q=0.5,uk;q=0.5,ar;q=0.4,hr;q=0.4,cs;q=0.4,el;q=0.3,he;q=0.3,ro;q=0.3,sk;q=0.3,th;q=0.2,id;q=0.2,ms;q=0.2,en-GB;q=0.1,ca;q=0.1,hu;q=0.1,vi;q=0.1
X-Apple-Partner: origin.0
X-Apple-Connection-Type: WiFi
X-Apple-Client-Versions: GameCenter/2.0
X-Apple-Store-Front: 143465-19,4
Accept-Encoding: gzip, deflate
Cookie: mzf_in=470712; dssid2=2AA7395F-89F2-4712-916F-0A088531E073; s_vi=[CS]v1|2765237E85163B5D-400001A62003E4D6[CE]; mz_at0=AwQAAAFHAADDUQAAAABO5LeksiwWh7aUz/iPQSBgb8VmAYXEqL4=; woinst=-1; asbid=sYADTAPXFDTKJ9A7D; Pod=47; s_vnum_n_us=%2C26%7C1%2C26%7C1; helpSession=950322-1322352339148; wosid=3TPW6w978bcd6ErcRBJrqg; NSC_JOrqbkrqbzdcfpneakznjve0ls3gsbq=ffffffff12a5ad0b45525d5f4f58455e445a4a423660; NSC_JOpaczate24xw4wbtny00zchqo3uacq=ffffffff1292397845525d5f4f58455e445a4a423660,mzf_in=470712; dssid2=2AA7395F-89F2-4712-916F-0A088531E073; s_vi=[CS]v1|2765237E85163B5D-400001A62003E4D6[CE]; mz_at0=AwQAAAFHAADDUQAAAABO5LeksiwWh7aUz/iPQSBgb8VmAYXEqL4=; woinst=-1; asbid=sYADTAPXFDTKJ9A7D; Pod=47; s_vnum_n_us=%2C26%7C1%2C26%7C1; helpSession=950322-1322352339148; wosid=3TPW6w978bcd6ErcRBJrqg; NSC_JOrqbkrqbzdcfpneakznjve0ls3gsbq=ffffffff12a5ad0b45525d5f4f58455e445a4a423660; NSC_JOpaczate24xw4wbtny00zchqo3uacq=ffffffff1292397845525d5f4f58455e445a4a423660
Connection: keep-alive
Proxy-Connection: keep-alive这个要怎么组包发送呀？
对User-Agent 有限制