javax.faces.partial.ajax: true
javax.faces.source: mainForm:j_id_r
javax.faces.partial.execute: mainForm
javax.faces.partial.render: mainForm:error mainForm:forResetPwd
mainForm:j_id_r: mainForm:j_id_r
mainForm:forResetPwd: XXXXXXXX(密码)
userName: 
userPwd: 
userDynamicPwd: 
userDynamicPwdd: 
serviceType: 
mainForm:userNameLogin: 311900xxxx(学号)
mainForm:serviceSuffixLogin: 
mainForm:passwordLogin: MDYxOTI3MVg=
mainForm:userDynamicPwd: 
mainForm:userDynamicPwdd: 
mainForm_SUBMIT: 1
javax.faces.ViewState: 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

N8QBoU0SYLMEO%2BJ0%2B0V4WpquoRG%2BCg9rDflycI7%2F6S5OmdqsPyrlwDTzgp834LDpOP6v%2FBr0DZjEK3JJ4cK3QMKaiLNL%2FK6vFOhgGx%2BspSOsElJt

无cookie状态，打开http://172.17.18.2:8080/byod/index.xhtml，

找到action="/byod/index.xhtml;jsessionid=7E3F85BF2279D91EBF7E01C7AD088238"，

并找到参数javax.faces.ViewState=N8QBoU0SYLMEO%2BJ0%2B0V4WpquoRG%2BCg9rDflycI7%2F6S5OmdqsPyrlwDTzgp834LDpOP6v%2FBr0DZjEK3JJ4cK3QMKaiLNL%2FK6vFOhgGx%2BspSOsElJt
（等号后面要进行url编码）

对http://172.17.18.2:8080/byod/index.xhtml;jsessionid=7E3F85BF2279D91EBF7E01C7AD088238进行post请求
参数为
wlannasid=&usermac=&userurl=&userip=&ssid=&btn=&j_id_3_SUBMIT=1&javax.faces.ViewState=N8QBoU0SYLMEO%2BJ0%2B0V4WpquoRG%2BCg9rDflycI7%2F6S5OmdqsPyrlwDTzgp834LDpOP6v%2FBr0DZjEK3JJ4cK3QMKaiLNL%2FK6vFOhgGx%2BspSOsElJt


至此，cookie获取完毕，可以进行登录请求。