通过编程解决下列问题:前后端代码实现实现基于web的学生管理系统的实例

由于基于web的学生管理系统的实现需要前后端联合实现，因此在下面提供一个基于Spring Boot、MyBatis、Vue等技术栈实现的学生管理系统前后端代码实现的示例，该示例包括以下功能：

1. 学生信息的增删改查操作。

2. 课程信息的增删改查操作。

3. 成绩信息的增删改查操作。

4. 学生和课程的关联操作。

5. 登录和退出系统的功能实现。

前端实现：

前端代码实现使用Vue、Element UI等技术，具体代码实现如下：

1. 学生信息管理页面的实现：

<template>
  <div>
    <h2>学生信息管理</h2>
    <el-button type="primary" @click="addStudent">添加学生</el-button>
    <el-table :data="students" style="width: 100%">
      <el-table-column prop="id" label="学号"></el-table-column>
      <el-table-column prop="name" label="姓名"></el-table-column>
      <el-table-column prop="gender" label="性别"></el-table-column>
      <el-table-column prop="age" label="年龄"></el-table-column>
      <el-table-column label="操作">
        <template slot-scope="scope">
          <el-button type="primary" size="mini" @click="editStudent(scope.row)">编辑</el-button>
          <el-button type="danger" size="mini" @click="deleteStudent(scope.row)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>
    <el-dialog title="添加学生" :visible.sync="addStudentVisible">
      <el-form :model="addStudentForm" label-width="80px">
        <el-form-item label="学号">
          <el-input v-model="addStudentForm.id"></el-input>
        </el-form-item>
        <el-form-item label="姓名">
          <el-input v-model="addStudentForm.name"></el-input>
        </el-form-item>
        <el-form-item label="性别">
          <el-radio-group v-model="addStudentForm.gender">
            <el-radio label="男"></el-radio>
            <el-radio label="女"></el-radio>
          </el-radio-group>
        </el-form-item>
        <el-form-item label="年龄">
          <el-input v-model="addStudentForm.age"></el-input>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="addStudentVisible = false">取 消</el-button>
        <el-button type="primary" @click="addStudentSubmit">确 定</el-button>
      </div>
    </el-dialog>
    <el-dialog title="编辑学生" :visible.sync="editStudentVisible">
      <el-form :model="editStudentForm" label-width="80px">
        <el-form-item label="学号">
          <el-input v-model="editStudentForm.id" disabled></el-input>
        </el-form-item>
        <el-form-item label="姓名">
          <el-input v-model="editStudentForm.name"></el-input>
        </el-form-item>
        <el-form-item label="性别">
          <el-radio-group v-model="editStudentForm.gender">
            <el-radio label="男"></el-radio>
            <el-radio label="女"></el-radio>
          </el-radio-group>
        </el-form-item>
        <el-form-item label="年龄">
          <el-input v-model="editStudentForm.age"></el-input>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="editStudentVisible = false">取 消</el-button>
        <el-button type="primary" @click="editStudentSubmit">确 定</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import axios from 'axios';

export default {
  data() {
    return {
      students: [],
      addStudentVisible: false,
      addStudentForm: {
        id: '',
        name: '',
        gender: '男',
        age: ''
      },
      editStudentVisible: false,
      editStudentForm: {
        id: '',
        name: '',
        gender: '',
        age: ''
      }
    };
  },
  methods: {
    getStudents() {
      axios.get('/api/students').then(response => {
        this.students = response.data;
      });
    },
    addStudent() {
      this.addStudentVisible = true;
    },
    addStudentSubmit() {
      axios.post('/api/students', this.addStudentForm).then(() => {
        this.addStudentVisible = false;
        this.addStudentForm = {
          id: '',
          name: '',
          gender: '男',
          age: ''
        };
        this.getStudents();
      });
    },
    editStudent(student) {
      this.editStudentVisible = true;
      this.editStudentForm = {
        id: student.id,
        name: student.name,
        gender: student.gender,
        age: student.age
      };
    },
    editStudentSubmit() {
      axios.put(`/api/students/${this.editStudentForm.id}`, this.editStudentForm).then(() => {
        this.editStudentVisible = false;
        this.editStudentForm = {
          id: '',
          name: '',
          gender: '',
          age: ''
        };
        this.getStudents();
      });
    },
    deleteStudent(student) {
      axios.delete(`/api/students/${student.id}`).then(() => {
        this.getStudents();
      });
    }
  },
  mounted() {
    this.getStudents();
  }
};
</script>

2. 课程信息管理页面的实现：

<template>
  <div>
    <h2>课程信息管理</h2>
    <el-button type="primary" @click="addCourse">添加课程</el-button>
    <el-table :data="courses" style="width: 100%">
      <el-table-column prop="id" label="课程编号"></el-table-column>
      <el-table-column prop="name" label="课程名称"></el-table-column>
      <el-table-column prop="credit" label="学分"></el-table-column>
      <el-table-column label="操作">
        <template slot-scope="scope">
          <el-button type="primary" size="mini" @click="editCourse(scope.row)">编辑</el-button>
          <el-button type="danger" size="mini" @click="deleteCourse(scope.row)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>
    <el-dialog title="添加课程" :visible.sync="addCourseVisible">
      <el-form :model="addCourseForm" label-width="80px">
        <el-form-item label="课程编号">
          <el-input v-model="addCourseForm.id"></el-input>
        </el-form-item>
        <el-form-item label="课程名称">
          <el-input v-model="addCourseForm.name"></el-input>
        </el-form-item>
        <el-form-item label="学分">
          <el-input v-model="addCourseForm.credit"></el-input>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="addCourseVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCourseSubmit">确 定</el-button>
      </div>
    </el-dialog>
    <el-dialog title="编辑课程" :visible.sync="editCourseVisible">
      <el-form :model="editCourseForm" label-width="80px">
        <el-form-item label="课程编号">
          <el-input v-model="editCourseForm.id" disabled></el-input>
        </el-form-item>
        <el-form-item label="课程名称">
          <el-input v-model="editCourseForm.name"></el-input>
        </el-form-item>
        <el-form-item label="学分">
          <el-input v-model="editCourseForm.credit"></el-input>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="editCourseVisible = false">取 消</el-button>
        <el-button type="primary" @click="editCourseSubmit">确 定</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import axios from 'axios';

export default {
  data() {
    return {
      courses: [],
      addCourseVisible: false,
      addCourseForm: {
        id: '',
        name: '',
        credit: ''
      },
      editCourseVisible: false,
      editCourseForm: {
        id: '',
        name: '',
        credit: ''
      }
    };
  },
  methods: {
    getCourses() {
      axios.get('/api/courses').then(response => {
        this.courses = response.data;
      });
    },
    addCourse() {
      this.addCourseVisible = true;
    },
    addCourseSubmit() {
      axios.post('/api/courses', this.addCourseForm).then(() => {
        this.addCourseVisible = false;
        this.addCourseForm = {
          id: '',
          name: '',
          credit: ''
        };
        this.getCourses();
      });
    },
    editCourse(course) {
      this.editCourseVisible = true;
      this.editCourseForm = {
        id: course.id,
        name: course.name,
        credit: course.credit
      };
    },
    editCourseSubmit() {
      axios.put(`/api/courses/${this.editCourseForm.id}`, this.editCourseForm).then(() => {
        this.editCourseVisible = false;
        this.editCourseForm = {
          id: '',
          name: '',
          credit: ''
        };
        this.getCourses();
      });
    },
    deleteCourse(course) {
      axios.delete(`/api/courses/${course.id}`).then(() => {
        this.getCourses();
      });
    }
  },
  mounted() {
    this.getCourses();
  }
};
</script