Java面向对象内测
2024-08-29 22:15:40
功能要求
开发基于控制台的试题信息管理系统。具体要求如下:
(1)显示试题信息管理系统主菜单,包括:
1)列出所有试题信息
2)按科目查询
3)按题干查询
4)添加试题
5)删除试题
6)退出系统
package com.szxs.question; /**
* 试题实体类
* @author
*
*/
public class QuestionInfo {
private int questionId; //试题编号
private String question; //题干
private String optionA; //选项A
private String optionB; //选项B
private String optionC; //选项C
private String optionD; //选项D
private int subject; //科目
private String answer; //正确答案 public QuestionInfo() {
} public QuestionInfo(int questionId, String question, String optionA, String optionB, String optionC, String optionD,
int subject, String answer) {
this.questionId = questionId;
this.question = question;
this.optionA = optionA;
this.optionB = optionB;
this.optionC = optionC;
this.optionD = optionD;
this.subject = subject;
this.answer = answer;
} public int getQuestionId() {
return questionId;
}
public void setQuestionId(int questionId) {
this.questionId = questionId;
}
public String getQuestion() {
return question;
}
public void setQuestion(String question) {
this.question = question;
}
public String getOptionA() {
return optionA;
}
public void setOptionA(String optionA) {
this.optionA = optionA;
}
public String getOptionB() {
return optionB;
}
public void setOptionB(String optionB) {
this.optionB = optionB;
}
public String getOptionC() {
return optionC;
}
public void setOptionC(String optionC) {
this.optionC = optionC;
}
public String getOptionD() {
return optionD;
}
public void setOptionD(String optionD) {
this.optionD = optionD;
}
public int getSubject() {
return subject;
}
public void setSubject(int subject) {
this.subject = subject;
}
public String getAnswer() {
return answer;
}
public void setAnswer(String answer) {
this.answer = answer;
} }
package com.szxs.question; /**
* 试题接口
* @author
*
*/
public interface QuestionInfoDao {
//查询所有试题
public void showQuestionInfo();
//根据科目查询试题
public void selectQuestion(int subject);
//根据题干查询试题
public void selectQuestion(String question);
//添加试题
public void addQuestion(String question,String optionA,String optionB,String optionC,String optionD,int subject,String answer);
//删除试题
public void delQuestion();
}
package com.szxs.question; import java.util.Scanner; /**
* 试题实现类
* @author
*
*/
public class QuestionInfoDaoImpl implements QuestionInfoDao {
QuestionInfo[] questions=new QuestionInfo[10];
public void init() {
questions[0]=new QuestionInfo(1,"下面关于栈的描述中错误的是( )","A、栈是先进后出的线性表","B、栈只能顺序存储",
"C、栈具有记忆功能","D、对栈的插入弓删除操作中,不需要改变栈底指针",1,"B");
questions[1]=new QuestionInfo(2,"在Java中,负责对字节代码解释执行的是( )","A.垃圾回收器","B.虚拟机",
"C.编译器","D.多线程机制",1,"C");
questions[2]=new QuestionInfo(3,"在Visual Studio.Net窗口中,()窗口提供令人连接本地或远程计算机上数据库并进行管理的功能","A 工具箱","B 资源视图 ",
"C 解决方案资源管理器","D 服务器资源管理器",2,"D");
questions[3]=new QuestionInfo(4,"XCOPY命令的()选项用来指示复制所有子目录,即使是空目录也要复制","A /q ","B /s",
"C /p ","D /e",2,"D");
questions[4]=new QuestionInfo(5,"如果做动态网站开发,以下()可以作为服务器端脚本语言","A java ","B JSP",
"C Javascript ","D Html",3,"A");
questions[5]=new QuestionInfo();
questions[6]=new QuestionInfo();
questions[7]=new QuestionInfo();
questions[8]=new QuestionInfo();
questions[9]=new QuestionInfo(); } /**
* 查询所有试题
*/
public void showQuestionInfo() {
for (QuestionInfo question : questions) {
if(question.getQuestion()!=null) {
System.out.println(question.getQuestionId()+"、"+question.getQuestion()+"\n\t"+question.getOptionA()+"\n\t"+question.getOptionB()+
"\n\t"+question.getOptionC()+"\n\t"+question.getOptionD()+"\n\t"+"答案:"+question.getAnswer());
}
}
} /**
* 根据科目查询试题
*/
public void selectQuestion(int subject) {
for (QuestionInfo question: questions) {
if(question.getQuestion()!=null && question.getSubject()==subject) {
System.out.println(question.getQuestionId()+"、"+question.getQuestion()+"\n\t"+question.getOptionA()+"\n\t"+question.getOptionB()+
"\n\t"+question.getOptionC()+"\n\t"+question.getOptionD()+"\n\t"+"答案:"+question.getAnswer());
}
}
} /**
* 根据题干查询试题
*/
public void selectQuestion(String question) {
for (QuestionInfo q : questions) {
if(q.getQuestionId()!=0 && q.getQuestion().contains(question)) {
System.out.println(q.getQuestionId()+"、"+q.getQuestion()+"\n\t"+q.getOptionA()+"\n\t"+q.getOptionB()+
"\n\t"+q.getOptionC()+"\n\t"+q.getOptionD()+"\n\t"+"答案:"+q.getAnswer());
}
}
} /**
* 添加试题
*/
public void addQuestion(String question, String optionA, String optionB, String optionC, String optionD,
int subject, String answer) {
for (int i=0;i<questions.length;i++) {
if(questions[i].getQuestion()==null) {
questions[i].setQuestionId(i+1);
questions[i]=new QuestionInfo(questions[i].getQuestionId(),question,optionA,optionB,optionC,optionD,subject,answer);
break;
}
}
System.out.println("添加成功!");
showQuestionInfo(); } /**
* 删除试题
*/
public void delQuestion() {
Scanner input=new Scanner(System.in); do {
System.out.print("请输入需要删除的试题编号:");
int questionId=input.nextInt();
boolean isDel=false;
int index=-1;
for(int i=0;i<questions.length;i++) {
if(questions[i].getQuestion()!=null && questions[i].getQuestionId()==questionId) {
index=i; //找到要删除的下标位置
isDel=true;
break;
}
}
if(index!=-1) {
for(int i=index;i<questions.length-1;i++) {
if(questions[i].getQuestion()!=null ) {
questions[i]=questions[i+1];
questions[i].setQuestionId(questions[i].getQuestionId()-1); //试题删除后试题编号重新排列
}
}
questions[questions.length-1]=new QuestionInfo(); //清空最后一个对象的数据
System.out.println("删除成功!");
} showQuestionInfo();
if(!isDel) {
System.out.println("对不起,没有要删除的编号!请重新输入");
}
if(isDel) {
break;
}
}while(true); } }
package com.szxs.question; import java.util.Scanner; /**
* 测试类
* @author
*
*/
public class Test { public static void main(String[] args) {
Scanner input=new Scanner(System.in);
QuestionInfoDaoImpl qdi=new QuestionInfoDaoImpl();
qdi.init(); System.out.println("****************欢迎使用试题管理系统**************");
do {
System.out.print("请选择操作(1、列出所有试题 2、按科目查询 3、按题干模糊查询 4、添加试题 5、删除试题 6、退出系统)");
switch(input.nextInt()) {
//列出所有试题
case 1:
qdi.showQuestionInfo();
break;
//按科目查询
case 2:
System.out.print("请输入科目:(1、Java 2、C# 3、JSP)");
int subject=input.nextInt();
qdi.selectQuestion(subject);
break;
//按题干查询
case 3:
System.out.print("请输入题干:");
String question=input.next();
qdi.selectQuestion(question);
break;
//添加试题
case 4:
System.out.print("请输入科目(1、Java 2、C# 3、JSP)");
subject=input.nextInt();
System.out.print("请输入新的题干:");
question=input.next();
System.out.print("请输入新的选项A:");
String optionA=input.next();
System.out.print("请输入新的选项B:");
String optionB=input.next();
System.out.print("请输入新的选项C:");
String optionC=input.next();
System.out.print("请输入新的选项D:");
String optionD=input.next();
System.out.print("请输入新的答案:");
String answer=input.next();
qdi.addQuestion(question, optionA, optionB, optionC, optionD, subject, answer);
break;
//删除试题
case 5:
qdi.delQuestion();
break;
//退出系统
case 6:
System.out.println("欢迎下次使用!");
return;
} }while(true); } }
如有优化的地方,请指教!
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