2 POST /hello/checkUser.html?opt=xxx HTTP/1.1 方法的声明，Get，Post，Delete等 3 Accept: */* 4 Referer: http://localhost:8000/hello/index.html 表示是从什么地方跳转过来的，有时候做爬虫的时候会用到，有些网站用这个字段来防止被爬虫 5 Accept-Language: zh-cn 6 Content-Type: multipart/form-data; boundary=---------------------------7d931c5d043e 表示本次传输数据的类型，form-data表示表单数据 7 Accept-Encoding: gzip, deflate 8 Host: localhost:8000 9 Content-Length: 382 10 Connection: Keep-Alive 11 Cache-Control: no-cache 12 Cookie: JSESSIONID=6FE3D8E365DF9FE26221A32624470D24 13 -----------------------------7d931c5d043e 14 Content-Disposition: form-data; name="username" 15 yyy 16 -----------------------------7d931c5d043e 17 Content-Disposition: form-data; name="age" 18 zzz 19 -----------------------------7d931c5d043e 20 Content-Disposition: form-data; name="file"; filename="C:\1.txt" 21 Content-Type: text/plain 22 hello 23 -----------------------------7d931c5d043e--