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后台获得数据

2020-04-05 18:18 85 查看
后台获得数据 
1 <body>
2
3     <form action = "do_post.jsp" method = "post">
4
5     用户名:<input type = "text" id = "" name = "user">
6     <br>
7     密码:&nbsp;<input type = "password" id = "" name = "pass">
8     <br>
9     性别:
10     <br>
11     男<input type = "radio" id = "" name = "sex" value = "nan"> &nbsp;
12     女<input type = "radio" id = "" name = "sex" value = "nv">
13     <br>
14     个人说明:
15     <br>
16     <textarea rows="4" cols="35" id = "" name = "text"></textarea>
17     <br>
18     <input type = "submit" value = "提交">
19     </form>
20
21 </body>

对于这些输入或单选都可以使用普遍输出:

1 <body>
2 <%
3     String user = request.getParameter("user");
4     request.setAttribute("user", user);
5
6     String pass = request.getParameter("pass");
7     request.setAttribute("pass", pass);
8
9     String sex = request.getParameter("sex");
10     request.setAttribute("sex", sex);
11
12     String text = request.getParameter("text");
13     request.setAttribute("text", text);
14 %>
15
16 <p>${user }</p>
17 <p>${pass }</p>
18 <p>${sex }</p>
19 <p>${text }</p>
20 </body>

而多选框因为多选，输出的是一个数组，所以：

1     <body>
2     爱好:
3     <br>
4     骑行<input type = "checkbox" id = "" name = "favorite" value = "qixing">
5     爬山<input type = "checkbox" id = "" name = "favorite" value = "pashan">
6     游泳<input type = "checkbox" id = "" name = "favorite" value = "youyong">
7     蹦极<input type = "checkbox" id = "" name = "favorite" value = "bengji">
8     </body>
1 <body>
2 String favorite[] = request.getParameterValues("favorite");
3 request.setAttribute("favorite", favorite);
4 <%
5 for(String a : favorite){
6 %>
7 <%=a %>
8 <%}%>
9 </body>

补充：

req.setCharacterEncoding("utf-8"); 改变编码格式

 

posted on 2017-12-16 13:43 沈汉学 阅读(...) 评论(...) 编辑 收藏

转载于:https://www.cnblogs.com/shenhx666/p/8046051.html

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