JSP基础6

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<%@ page contentType="text/html; Charset=gb2312" language="java" import="java.util.*" errorPage="" %><html><head>  <title>JSP练习</title></head><body><form action="b.jsp" method="post" name="frmName">   <font color="black" size="3">   <br>选择一幅图像:       <select name="img">           <option value="images/love.jpg" selected>人物</option>           <option value="images/wife.jpg">爱人</option>           <option value="images/xx.jpg">小侄子</option>       </select>   <br>选择视频或音乐:       <select name="video">           <option value="a.wmv">茉莉花</option>           <option value="b.wmv">动画片</option>           <option value="c.wmv">飞翔的鸽子</option>       </select>     <br><input type="submit" value="提交" name="submit">         </font></form> </body></html><%@ page contentType="text/html; Charset=gb2312"%><html><head><title>Jsp练习</title></head><%!     public String getGBString(String src){        try{           if (src == null) return null;           else{               src = new String(src.getBytes("ISO-8859-1"), "GBK");               return src;           }        }        catch (Exception e){            return null;        }     }      %><body><%    String img = request.getParameter("img");    String video = request.getParameter("video");    if (img == null){        img = "images/love.jpg";    }    if (video == null){        video = "a.wmv";    }%>    <img src="<%=img%>" width="120" height="120">图像</img>    <embed src="<%=video%>" width="120" height="120">视频</embed></body></html>