Poll Test

来源：互联网发布：网络自制综艺节目抄袭编辑：程序博客网时间：2024/05/18 15:06

这是我的第一个JSP 投票页面测试例子：

1.
F:/Tomcat 5.0/webapps/ROOT/poll
poll.html

2.
F:/Tomcat 5.0/webapps/ROOT/poll/vote
poll_cope.jsp

1。poll.html

<html>
<head>
<title>请你投票</title>

body { font-family:宋体; font-size:9pt}
th { font-size: 9pt }

</style>
</head>

<tr><td colspan=2 align='center'><B><h4>在线调查</h4></B></td></tr>
<tr><td colspan=2 align='center'><h4>你认为哪只队伍能获得04－05赛季的意甲冠军？</h4></td></tr>

</table>
</body>
</html>

2.poll_cope.jsp

<%@ page import = "java.util.*,java.lang.*,java.io.*"%>
<%

String polldata = "";
String resultsDir = "F:Tomcat 5.0/webapps/ROOT/poll/vote";

try{

//在这里，定义File 对象myfile 的唯一作用就是用来判断保存投票记录的文件是否存在
File myfile = new File(resultsDir + System.getProperty("file.separator") + "survey.txt");

if( !(myfile.exists())){

//如果文件存在，则先定义FileWriter 对象resultsFile ，再将其赋值给PrintWriter 对象toFile
FileWriter resultsFile = new FileWriter(resultsDir + System.getProperty("file.separator")
+ "survey.txt", true);

//使用PrintWriter 的方法println() 来写入数据，保存投票结果
PrintWriter toFile = new PrintWriter(resultsFile);

//使用枚举类Enumeration 对象获取客户端的所有请求
Enumeration names = request.getParameterNames();
while(names.hasMoreElements())
{
String name = (String)names.nextElement();
String value = request.getParameterValues(name)[0];
/*
if(name.compareTo("submit")!=0) {
  out.println(name + ":" + value);
  //RAFile.writeBytes(name + ":" + value + "/r/n");
  toFile.println(name + ":" + value);
}
*/
if(value.compareTo("milan")==0) {
  polldata="1:0:0";
  toFile.println(polldata);
}
if(value.compareTo("juven")==0) {
  polldata="0:1:0";
  toFile.println(polldata);
}
if(value.compareTo("inter")==0) {
  polldata="0:0:1";
  toFile.println(polldata);
}
}//while(names.hasMoreElements())

//关闭文件对象
resultsFile.close();
toFile.close();

}//if( !(myfile.exists()))
else{

//使用RandomAccessFile 类可读型对象("r")的方法readLine() 读取文件数据
RandomAccessFile RAFile_read = new RandomAccessFile(resultsDir
+ System.getProperty("file.separator") + "survey.txt", "r");

//使用RandomAccessFile 类写入型对象("rw")的方法writeBytes() 写入投票结果
RandomAccessFile RAFile_write = new RandomAccessFile(resultsDir
+ System.getProperty("file.separator") + "survey.txt", "rw");

String record = RAFile_read.readLine();

//更新投票结果
int first =record.indexOf(":");
int last =record.lastIndexOf(":");
int len = record.length();
String First = record.substring(0,first);
String Next = record.substring(first+1,last);
String Last = record.substring(last+1,len);
int a1 = Integer.parseInt(First);
int a2 = Integer.parseInt(Next);
int a3 = Integer.parseInt(Last);

Enumeration names = request.getParameterNames();
while(names.hasMoreElements())
{
  String name = (String)names.nextElement();
  String value = request.getParameterValues(name)[0];
        if(value.compareTo("milan")==0) a1++;
     if(value.compareTo("juven")==0) a2++;
     if(value.compareTo("inter")==0) a3++;
     }//while(names.hasMoreElements())

  String b1 = String.valueOf(a1);
  String b2 = String.valueOf(a2);
  String b3 = String.valueOf(a3);

RAFile_write.writeBytes(b1 + ":" + b2 + ":" + b3);
out.println(b1 + ":" + b2 + ":" + b3);

  //关闭文件对象
  RAFile_write.close();
  RAFile_read.close();

}//else

out.println("谢谢你的参与！");

//关闭输出对象
out.close();

}catch(FileNotFoundException ex){
ex.printStackTrace();
out.println( "File Not Found, Please try again.");
}
catch(IOException e){
e.printStackTrace();
out.println( "A problem occured while recording your voting , Please try again.");
};
%>

3.survey.txt(运行后自动生成)
F:/Tomcat 5.0/webapps/ROOT/poll/vote

1236:2:3