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JSP页面处理和输出

代码

<%@page contentType="text/html;charset=GBK"%>
<%@page import="java.util.HashMap" %>
<%!    private HashMap sexMap;
    private HashMap favorMap;

    public void jspInit() {
        sexMap = new HashMap();
        sexMap.put("male", "男");
        sexMap.put("female", "女");
        favorMap = new HashMap();
        favorMap.put("sport", "运动");
        favorMap.put("sleep", "睡觉");
        favorMap.put("art", "艺术");
        favorMap.put("others", "其他");
    }

    private String escapeHtml(String str) {
        int len = str.length();
        StringBuffer sb = new StringBuffer(len);
        for (int i = 0; i < len; i++) {
            char c = str.charAt(i);
            switch (c) {
                case '<':
                    sb.append("&lt;");
                    break;
                case '>':
                    sb.append("&gt;");
                    break;
                case ' ':
                    sb.append("&nbsp;");
                    break;
                case '"':
                    sb.append("&quot;");
                    break;
                case '&':
                    sb.append("&amp;");
                    break;
                case '\n':
                    sb.append("<br>");
                    break;
                default:
                    sb.append(c);
            }
        }
        return sb.toString();
    }

    private String transString(String str, String error) {
        String result;
        if (str == null || (str = str.trim()).length() == 0) {
            result = "<font color='red'>" + error + "</font>";
        } else {
            result = escapeHtml(str);
        }
        return result;
    }
%>
<%
request.setCharacterEncoding("GBK");
String nameDesc = request.getParameter("name");
nameDesc = transString(nameDesc, "你未提供名字");

String sexDesc = request.getParameter("sex");
sexDesc = (String)sexMap.get(sexDesc);

String[] favors = request.getParameterValues("favor");
String favorDesc = "";
if(favors!=null){
    for (int i = 0; i < favors.length; i++) {
        favorDesc += " " + (String)favorMap.get(favors[i]);
        }
    }
favorDesc = transString(favorDesc, "你未选择爱好");

String introDesc = request.getParameter("intro");
introDesc = transString(introDesc, "你未填写简介");
%>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=GBK">
        <title>JSP Page</title>
    </head>
    <body>
        <b>你填写的信息是：</b><br>
        <b>名字：</b><%=nameDesc%><br>
        <b>性别：</b><%=sexDesc%><br>
        <b>爱好：</b><%=favorDesc%><br>
        <b>简介：</b><br>
        <div style="background: #ffffdd">
            <%=introDesc%>
        </div>
    </body>
</html>

代码

<html>
  <head>
    <title></title>
    <meta http-equiv="Content-Type" content="text/html; charset=GBK">
  </head>
  <body>
      <form action="proc.jsp" method="post">
          姓名：<input type="text" name="name"><br>
          <fieldset>
              <legend>性别</legend>
              <input type="radio" name="sex" value="male" checked>男
              <input type="radio" name="sex" value="female">女
          </fieldset>
          <fieldset>
              <legend>爱好</legend>
              <input type="checkbox" name="favor" value="sport">运动
              <input type="checkbox" name="favor" value="sleep">睡觉
              <input type="checkbox" name="favor" value="art">艺术
              <input type="checkbox" name="favor" value="others">其他
          </fieldset>
          简介：<br>
          <textarea cols="30" row="4" name="intro"></textarea>
          <br>
          <input type="submit" value="提交">
          <input type="reset" value="重写">
      </form>
  </body>
</html>

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原文地址：https://www.cnblogs.com/qixin622/p/1776108.html