get请求

function get(){        $.get( "./Aservlet?id=5", function(data, textStatus, jqXHR){            $("body").append( data );        } );            };

发送时候 截取的报文 GET http://localhost:8080/KKserver/Aservlet?id=5 HTTP/1.1Host: localhost:8080Connection: keep-aliveAccept: */*X-Requested-With: XMLHttpRequestUser-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.75 Safari/537.36Referer: http://localhost:8080/KKserver/test.htmlAccept-Encoding: gzip, deflate, sdch, brAccept-Language: zh-CN,zh;q=0.8

返回的报文HTTP/1.1 200 OKServer: Apache-Coyote/1.1Content-Length: 100Date: Fri, 23 Dec 2016 08:18:11 GMTGET http://localhost:8080/KKserver/Aservlet id=5GET http://localhost:8080/KKserver/Aservlet id=5

 

post请求

function post(){        $.post( "./Aservlet?",{ bookId: 2 , money: 100}, function(data,textStatus, jqXHR){            $("body").append( data );        } );    };

发送的报文

POST http://localhost:8080/KKserver/Aservlet? HTTP/1.1Host: localhost:8080Connection: keep-aliveContent-Length: 18Accept: */*Origin: http://localhost:8080X-Requested-With: XMLHttpRequestUser-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.75 Safari/537.36Content-Type: application/x-www-form-urlencoded; charset=UTF-8Referer: http://localhost:8080/KKserver/test.htmlAccept-Encoding: gzip, deflate, brAccept-Language: zh-CN,zh;q=0.8bookId=2&money=100

返回的报文

HTTP/1.1 200 OKServer: Apache-Coyote/1.1Content-Length: 10Date: Fri, 23 Dec 2016 08:21:45 GMTPOST :ok

post  json时候

$.ajax({             url: "./Aservlet",             type: "POST",             data: ss,             success:  function(data, textStatus, jqXHR){                    $("body").append( data );                } ,              dataType: "json"             });

发送的报文

POST http://localhost:8080/KKserver/Aservlet HTTP/1.1Host: localhost:8080Connection: keep-aliveContent-Length: 28Accept: application/json, text/javascript, */*; q=0.01Origin: http://localhost:8080X-Requested-With: XMLHttpRequestUser-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.75 Safari/537.36Content-Type: application/x-www-form-urlencoded; charset=UTF-8Referer: http://localhost:8080/KKserver/test.htmlAccept-Encoding: gzip, deflate, brAccept-Language: zh-CN,zh;q=0.8{"name":"the5fire","age":38}

返回的报文

HTTP/1.1 200 OKServer: Apache-Coyote/1.1Content-Length: 10Date: Fri, 23 Dec 2016 08:24:03 GMTPOST :ok

但是用backbonejs 中的 model的   .save();方法时候

发送的报文

POST http://localhost:8080/KKserver/Aservlet HTTP/1.1Host: localhost:8080Connection: keep-aliveContent-Length: 28Accept: application/json, text/javascript, */*; q=0.01Origin: http://localhost:8080X-Requested-With: XMLHttpRequestUser-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.75 Safari/537.36Content-Type: application/jsonReferer: http://localhost:8080/KKserver/demo3.htmlAccept-Encoding: gzip, deflate, brAccept-Language: zh-CN,zh;q=0.8{"name":"张三","age":"38"}

服务端用request.getParameterMap(); 却获取不到数据  不知道这是为什么？

补充 （ chrome  插件 Advanced REST client  挺好的 可以模拟发送http请求）

发现 就是因为  

Content-Type: application/json（backbonejs的）

Content-Type: application/x-www-form-urlencoded（常规的） 所以后台常规办法request.getattrivute 是不行的  看文章说 spring 框架可以解决 但是属于后台的范畴我就先不研究了 不知道用servlet有什么好办法呢？如果您看到这里 恰巧知道 请留言谢谢 经过小云同学的努力  知道了 后台可以

//字符串读取    public void charReader(HttpServletRequest request) throws IOException {        BufferedReader br = request.getReader();        String str, wholeStr = "";        while((str = br.readLine()) != null){        wholeStr += str;        }        System.out.println(wholeStr);    }    //二进制读取    public void binaryReader(HttpServletRequest request) throws IOException {        int len = request.getContentLength();        ServletInputStream iii = request.getInputStream();        byte[] buffer = new byte[len];        iii.read(buffer, 0, len);    }

偶也！！！！！