利用反射将获取的数据封装成对象

public class MyServlet extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        try {
            // 利用反射封装数据
            // 1、获取所有数据
            Map<String, String[]> map = req.getParameterMap();

            // 2、封装学生对象
            Student stu = new Student();
            // 2.1遍历map集合
            for (String key : map.keySet()) {
                String[] values = map.get(key);
                // 2.2获取Student对象的属性描述器（获取属性的get\set方法对象）
                PropertyDescriptor pd = new PropertyDescriptor(key, stu.getClass());
                // 2.3获取对应的set方法对象
                Method setMethod = pd.getWriteMethod();
                // 2.4执行方法
                if (values.length > 1)
                    setMethod.invoke(stu, (Object)values);
                else
                    setMethod.invoke(stu, values);
            }
            System.out.println(stu);
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

public class Student {

    private String userName;
    private String age;
    private String[] hobby;
    private boolean sec;

    public Student() {}

    public Student(String userName, String age, String[] hobby) {
        this.userName = userName;
        this.age = age;
        this.hobby = hobby;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getAge() {
        return age;
    }

    public void setAge(String age) {
        this.age = age;
    }

    public String[] getHobby() {
        return hobby;
    }

    public void setHobby(String[] hobby) {
        this.hobby = hobby;
    }

    @Override
    public String toString() {
        return "Student {userName=" + userName + ", age=" + age + ", hobby=" + Arrays.toString(hobby) + "}";
    }

}