4xx错误的本质：服务器已经接收到请求，
路径错误！
{ URL: http://10.100.138.32:8046/3-0/app/account/maxin } { status code: 404, headers {
"Access-Control-Allow-Origin" = "*";
"Content-Language" = en;
"Content-Length" = 949;
"Content-Type" = "text/html;charset=utf-8";
Date = "Fri, 15 Dec 2017 02:38:08 GMT";
Server = "Apache-Coyote/1.1";
} }
参量错误：
{
client = iOS;
merchId = 80AB7AD172214B3078034A43ABB4E08F;
sendTime = 1513305816648;
ss = ee;//没有这个
userId = zxy2015;
version = "2.3.2";
}
{ URL: http://10.100.138.32:8046/3-0/app/account/main } { status code: 400, headers {
"Access-Control-Allow-Origin" = "*";
Connection = close;
"Content-Language" = en;
"Content-Length" = 968;
"Content-Type" = "text/html;charset=utf-8";
Date = "Fri, 15 Dec 2017 02:40:45 GMT";
Server = "Apache-Coyote/1.1";
} }