jsp综合应用之标准化考试

原创

hoho_12 2015-12-22 20:51:34 ©著作权

文章标签 JavaWeb jsp java jsp页面 Test 文章分类 代码人生

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实验要求：

使用bean来管理试题文件，jsp页面调用bean实现网络标准化考试。

当考试者选择一套试题，并确定开始考试后，bean负责读入试题，并显示给考试者。当考试者在jsp页面提供的文本框输入全部的答案，单击提交键后，jsp页面再次调用bean来判断考试者的得分，而且考试者只有一次提交答案的机会，bean还负责将考试者的成绩保存到文件。

实验步骤：

1.创建bean的源文件test.java

package com.wxh;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.RandomAccessFile;
public class Test {
  String fileName="",
  correctAnswer="",
  testContent="",
  selection="";
  int score=0;
  int giveAnswerCount=0;
  String name="",number="";
  public String getFileName() {
    return fileName;
  }
  public void setFileName(String fileName) {
    this.fileName = fileName;
    selection="";
    score=0;
    giveAnswerCount=0;
  }
  
  public String getCorrectAnswer() {
    try{
      File f=new File("F:\2000",fileName);
      FileReader in=new FileReader(f);
      BufferedReader buffer=new BufferedReader(in);
      correctAnswer=(buffer.readLine()).trim();
      buffer.close();
      in.close();
    }catch(Exception e){}
    if(giveAnswerCount==1){
      return correctAnswer;
    }else{
      return "你只有一次提交答案的机会，不允许2次提交答案";
    }    
  }
  public void setCorrectAnswer(String correctAnswer) {
    this.correctAnswer = correctAnswer;
  }
  
  public String getTestContent() {
    StringBuffer temp=new StringBuffer();
    try{
      if(fileName.length()>0){
        File f=new File("F:\2000",fileName);
        FileReader in=new FileReader(f);
        BufferedReader buffer=new BufferedReader(in);
        String str=buffer.readLine();
        while((str=buffer.readLine())!=null){
          temp.append("\n"+str);
        }        
        buffer.close();
        in.close();      
      }
    }
    catch(Exception e){}    
    return new String(temp);
  }
  public void setTestContent(String testContent) {
    this.testContent = testContent;
  }
  public String getSelection() {
    return selection;
  }
  public void setSelection(String selection) {
    this.selection = selection;
  }
  public int getScore() {    
    score=0;
    if(giveAnswerCount==1){
      int length1=selection.length();
      int length2=selection.length();
      int min=(int)(Math.min(length1,length2));
      int i=0;
      while(i<min){
        if(selection.charAt(i)==correctAnswer.charAt(i))
          score++;
        i++;
      }
      WriteRecorder teacher=new WriteRecorder();
      teacher.write(name,number,score);
    }    
    return score;
  }
  public void setScore(int score) {
    this.score = score;
  }
  public int getGiveAnswerCount() {
    return giveAnswerCount;
  }
  public void setGiveAnswerCount(int giveAnswerCount) {
    this.giveAnswerCount = giveAnswerCount;
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public String getNumber() {
    return number;
  }
  public void setNumber(String number) {
    this.number = number;
  }  
}

class WriteRecorder
{
  RandomAccessFile random;
  File f=new File("成绩单.txt");
  WriteRecorder()
  {
    try{
      random=new RandomAccessFile(f,"rw");
    }catch(Exception ee){}
  }
  public void write(String name,String number,int score)
  {
    try{
      random.seek(random.length());
      String mess="Name:"+name+","+number+","+score;
      random.writeBytes(mess);
      random.close();      
    }catch(Exception ee){
      System.out.println(ee);
    }
  }
}

2.设计jsp页面

<span style="font-family: 宋体; white-space: pre;"><%@ page import="com.wxh.* "%></span><span style="font-family: 宋体; white-space: pre;">  </span>

<body>
<jsp:useBean id="test" class="com.wxh.Test" scope="session" />
<jsp:setProperty name="test" property="name" param="name" />
<jsp:setProperty name="test" property="number" param="number" />
<jsp:setProperty name="test" property="fileName" param="fileName"/>
<form action="" method="post" name=form1>
  输入姓名：<input type="text" name="name" size=10>
  输入学号：<input type="text" name="fileName" size=10>
  请选择试题：<select name="fileName" value="A.txt">
        <option value=A.txt>A.txt</option>
        <option value=B.txt>B.txt</option>
        <option value=C.txt>C.txt</option>
        </select>
  <input type="submit" name="sub" value="确定">
</form>
<TextArea Rows="8" Cols="66">
<jsp:getProperty name="test" property="testContent" />
</TextArea>
<jsp:setProperty name="test" property="giveAnswerCount" param="giveAnswerCount"/>
<form action="" method="post" name=form2>
  在文本框输入全部题目的答案，答案之间不允许有空格：<br/>
  <input type="text" name="selection" size=70>
  <input type="hidden" name="giveAnswerCount"
  value="<%=test.getGiveAnswerCount()+1%>"><br>  
  <input type="submit" value="提交">
</form>
<jsp:setProperty name="test" property="selection"/>
试题的正确答案:<jsp:getProperty name="test" property="correctAnswer" />
<br>您提交的答案:<jsp:getProperty name="test" property="selection"/>
<br>您的分数:<jsp:getProperty name="test" property="score" />
</body>