Java：请求Servlet，为什么数据长度显示-1呢
public class Test extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println(request.getParameter("line"));
int len = request.getContentLength();
System.out.println("len:"+len);
}
}
请求URL：
输出结果：
数据都已经接收到了，为什么数据长度是-1呢？
killuag
10 years, 2 months ago
Answers
我理解是说, HTTP GET请求是没有 Content的, GET请求大概张这个样子:
GET http://localhost/Blabla HTTP/1.1
Accept: text/css
Accept-Language: en-US
User-Agent: Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0)
Accept-Encoding: gzip, deflate
Connection: Keep-Alive
DNT: 1
Cookie: JSESSIONID=FSDFAFWE233T3344T24FG4F42424R34R
而HTTP POST是有content的, Header里有Content-Length这个值.
POST http://localhost/blabla HTTP/1.1
Accept: */*
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Accept-Language: en-US
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0)
Connection: Keep-Alive
Content-Length: 28
JSESSIONID=nLHpSPGfJyYpNJmHv8spG7NPdhCqPB0Y7ySHBnH6pcGbBclpn06S!-697632674
data1=fadfasdfa&data2=dfasdfasd
请用doPost()试一下.
这该死的昵称
answered 10 years, 2 months ago