JI-course-student-list.js

// open http://coursesel.umji.sjtu.edu.cn/tpm/findAll_LessonTaskStudent.action 
// and paste the code on DeveloperTools - Console

let data = JSON.parse(document.documentElement.innerText)['data'];
let elected = {};

for (let datum of data) {
    let course = datum['courseName']+datum['courseShortName'];
    let student = datum['studentName'];
    let section = datum['lessonTaskId'];

    if (course in elected) {
        if (section in elected[course]) {
            elected[course][section].push(student);
        } else {
            elected[course][section] = [student];
        }
    } else {
        elected[course] = {};
        elected[course][section] = [student];
    }
}

document.write(JSON.stringify(elected, null, 2));