这篇文章主要为大家详细介绍了Java实现在线测评考试系统的方法，文中示例代码介绍的非常详细，零基础也能参考此文章，感兴趣的小伙伴们可以参考一下。

代码展示

package service;

import java.util.ArrayList;

import java.util.List;

import java.util.Random;

import util.Config;
import util.Md5Utils;
import entity.EntityContext;
import entity.ExamInfo;
import entity.Question;
import entity.QuestionInfo;
import entity.User;
import exception.IdOrPasswordException;

public class ExamServiceImpl implements ExamService {
private EntityContext entityContext;
private List<QuestionInfo> paper = new ArrayList<QuestionInfo>();
private Config config;
private User loginUser;

public List<QuestionInfo> getPaper() {

return paper;}public void setPaper(List<QuestionInfo> paper) { this.paper = paper;}public ExamServiceImpl(EntityContext entityContext, Config config) { super(); this.entityContext = entityContext; this.config = config;}public ExamServiceImpl(EntityContext entityContext) { super(); this.entityContext = entityContext;}@Overridepublic User login(int id, String password) throws IdOrPasswordException { loginUser = entityContext.findUserById(id); if (loginUser == null) { throw new IdOrPasswordException("鏃犳鐢ㄦ埛!"); } if (loginUser.getPassword().equals(Md5Utils.md5(password))) { return loginUser; } throw new IdOrPasswordException("瀵嗙爜閿欒!");}@Overridepublic ExamInfo start() { buildPaper(); ExamInfo examInfo = new ExamInfo(); examInfo.setUser(loginUser); examInfo.setTimeLimit(config.getInt("TimeLimit")); examInfo.setExamTitle(config.getString("PaperTitle")); examInfo.setQuestionNumber(config.getInt("QuestionNumber")); return examInfo;}private void buildPaper() { int i = 0; Random random = new Random(); for (int level = Question.LEVEL1; level <= Question.LEVEL10; level++) { List<Question> list = entityContext.getQuestions(level); Question q1 = list.remove(random.nextInt(list.size())); Question q2 = list.remove(random.nextInt(list.size())); paper.add(new QuestionInfo(++i, q1)); paper.add(new QuestionInfo(++i, q2)); }}@Overridepublic QuestionInfo getQuestionInfo(int index) { return paper.get(index - 1);}@Overridepublic void sendUserAnswers(int questionIndex, List<Integer> answers) { QuestionInfo questionInfo = paper.get(questionIndex - 1); questionInfo.setUserAnswers(new ArrayList<Integer>(answers));}@Overridepublic int getTotalSocre() { int score = 0; for (QuestionInfo questionInfo : paper) { if (questionInfo.getUserAnswers().equals( questionInfo.getQuestion().getAnswers())) { score += questionInfo.getQuestion().getScore(); } } return score;}}

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