81 lines
3.6 KiB
Plaintext
81 lines
3.6 KiB
Plaintext
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
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<%@ page import="java.sql.*, java.util.Map, java.util.HashMap" %>
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<%
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String studentId = "12345";
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String teacherId = request.getParameter("teacher");
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String courseId = request.getParameter("course");
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if (teacherId != null && courseId != null) {
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try {
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Class.forName("com.mysql.cj.jdbc.Driver");
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Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "SchoolST", "123456");
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String sql = "SELECT d.dimension_id, d.weight, COUNT(q.question_id) AS question_count " +
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"FROM dimensions d " +
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"LEFT JOIN questions q ON d.dimension_id = q.dimension_id " +
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"GROUP BY d.dimension_id";
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Statement stmt = conn.createStatement();
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ResultSet rs = stmt.executeQuery(sql);
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Map<Integer, Float> dimensionWeights = new HashMap<>();
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Map<Integer, Integer> dimensionQuestionCounts = new HashMap<>();
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while (rs.next()) {
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int dimensionId = rs.getInt("dimension_id");
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dimensionWeights.put(dimensionId, rs.getFloat("weight"));
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dimensionQuestionCounts.put(dimensionId, rs.getInt("question_count"));
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}
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rs.close();
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stmt.close();
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Map<Integer, Integer> questionToDimension = new HashMap<>();
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sql = "SELECT question_id, dimension_id FROM questions";
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stmt = conn.createStatement();
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rs = stmt.executeQuery(sql);
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while (rs.next()) {
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questionToDimension.put(rs.getInt("question_id"), rs.getInt("dimension_id"));
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}
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rs.close();
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stmt.close();
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Map<Integer, Float> dimensionScores = new HashMap<>();
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for (String paramName : request.getParameterMap().keySet()) {
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if (paramName.startsWith("question_")) {
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String questionId = paramName.replace("question_", "");
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int qId = Integer.parseInt(questionId);
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int dimensionId = questionToDimension.get(qId);
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int answer = Integer.parseInt(request.getParameter(paramName));
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dimensionScores.put(dimensionId, dimensionScores.getOrDefault(dimensionId, 0f) + answer);
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}
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}
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float totalScore = 0;
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for (Map.Entry<Integer, Float> entry : dimensionScores.entrySet()) {
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int dimensionId = entry.getKey();
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float scoreSum = entry.getValue();
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float weight = dimensionWeights.get(dimensionId);
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int questionCount = dimensionQuestionCounts.get(dimensionId);
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float dimensionScore = (scoreSum / questionCount) * (weight / 100) * 100;
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totalScore += dimensionScore;
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}
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sql = "INSERT INTO evaluations (student_id, teacher_id, course_id, total_score) VALUES (?, ?, ?, ?)";
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PreparedStatement pstmt = conn.prepareStatement(sql);
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pstmt.setString(1, studentId);
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pstmt.setString(2, teacherId);
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pstmt.setString(3, courseId);
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pstmt.setFloat(4, totalScore);
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pstmt.executeUpdate();
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pstmt.close();
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conn.close();
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out.println("提交成功！");
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} catch (Exception e) {
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e.printStackTrace();
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out.println("评价提交失败！错误信息：" + e.getMessage());
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}
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} else {
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out.println("请填写完整的评价信息！");
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}
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%> |