标签：size 需要 img ffffff inpu ddr round get 利用
1、queryString就是附加在URL中带的参数，这部分参数会被URLEncode。
2、url中带的参数可以和body中带的参数相同，body中的多个参数也可以相同。request.getParameter(name)只能返回一个值，如果url中包含该参数则返回url中的值，否则返回body中所带的参数（如果body存在多个相同的，则取第一个）。
3、GET 不能通过Body传输数据。post采取x-www-form-urlencoded时，body编码为：paramA=valueA¶mB=valueB&......
4、只有使用的API需要从body读流（如：request.getParameter()），则会把body中所有的流读完，读完之后，后续从流中再也读不出数据。
5、如果先从流中读取数据，则后续的可能利用流中数据的API（如：request.getParameter()）得不到数据。
6、post的body编码为form-data时，具体的body输出为：
body:----------------------------153444641201830529978079 Content-Disposition: form-data; name="a" a ----------------------------153444641201830529978079 Content-Disposition: form-data; name="b" b ----------------------------153444641201830529978079 Content-Disposition: form-data; name="c" c ----------------------------153444641201830529978079-- |
doPost()如下：
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //后从body读流 System.out.println("queryString:"+request.getQueryString()); System.out.println("urI:"+request.getRequestURI()); System.out.println("URL:"+request.getRequestURL()); Map<String, String[]> params = request.getParameterMap(); for (String key : params.keySet()) { String[] values = params.get(key); for (int i = 0; i < values.length; i++) { String value = values[i]; System.out.println("["+key+","+value+"]"); } } System.out.println("getParameter-name:"+request.getParameter("name")); System.out.println("getParameter-address:"+request.getParameter("address")); String body = getStreamAsString(request.getInputStream(), "utf-8"); System.out.println("body:"+body+"|"); }
queryString:name=urlName urI:/Web URL:http://localhost:8080/Web [name,urlName] [name,bodyname] [name,duplicateName] [address,bodyaddressaddress] getParameter-name:urlName getParameter-address:bodyaddressaddress body:|
queryString:null urI:/Web URL:http://localhost:8080/Web [name,bodyname] [name,duplicateName] [address,bodyaddressaddress] getParameter-name:bodyname getParameter-address:bodyaddressaddress body:|
doPost()代码如下：
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 先从body读流 String body = getStreamAsString(request.getInputStream(), "utf-8"); System.out.println("body:" + body + "|"); System.out.println("queryString:" + request.getQueryString()); System.out.println("urI:" + request.getRequestURI()); System.out.println("URL:" + request.getRequestURL()); Map<String, String[]> params = request.getParameterMap(); for (String key : params.keySet()) { String[] values = params.get(key); for (int i = 0; i < values.length; i++) { String value = values[i]; System.out.println("[" + key + "," + value + "]"); } } System.out.println("getParameter-name:" + request.getParameter("name")); System.out.println("getParameter-address:" + request.getParameter("address")); }
body:name=bodyname&name=duplicateName&address=bodyaddressaddress| queryString:name=urlName urI:/Web URL:http://localhost:8080/Web [name,urlName] getParameter-name:urlName getParameter-address:null
body:name=bodyname&name=duplicateName&address=bodyaddressaddress| queryString:null urI:/Web URL:http://localhost:8080/Web getParameter-name:null getParameter-address:null
标签：size 需要 img ffffff inpu ddr round get 利用
原文地址：http://www.cnblogs.com/YDDMAX/p/7226701.html
