有能翻译以下吗？求答案

Question

protected
void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {
Class userClass = null;
Object user = null;

    try {
        userClass = Class.forName("com.example.homework2.User");
        Constructor constructor = userClass.getConstructor();
        user = constructor.newInstance();

    } catch (ClassNotFoundException | NoSuchMethodException | InstantiationException | IllegalAccessException | InvocationTargetException e) {
        e.printStackTrace();
    }
    Enumeration<String> parameterNames = request.getParameterNames();
    while (parameterNames.hasMoreElements()) {
        String parameterKey = parameterNames.nextElement();
        String upperCase = parameterKey.toUpperCase();
        String[] parameterValues = request.getParameterValues(parameterKey);
        Method method = null;
        String getMethod = "set" + parameterKey.replace(parameterKey.charAt(0), upperCase.charAt(0));
        try {

            if (parameterValues.length != 1) {
                method = userClass.getMethod(getMethod, String[].class);
                method.invoke(user, (Object) parameterValues);
            } else {
                method = userClass.getMethod(getMethod, String.class);
                method.invoke(user, parameterValues[0]);
            }
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        }
    }
    System.out.println(user);
}

Answer 1

// HttpServletRequest 是一次网络请求中的请求信息，HttpServletResponse 是网络请求中的响应信息
protected
void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {
Class userClass = null;
Object user = null;

    try {
        // 从Jar包中加载"com.example.homework2.User"类，加载结果为Class
        userClass = Class.forName("com.example.homework2.User");

        // 获取类"com.example.homework2.User"的构造函数
        Constructor constructor = userClass.getConstructor();
      // 调用构造函数反射生成实例
        user = constructor.newInstance();
 
// 反射过程中的异常处理
    } catch (ClassNotFoundException | NoSuchMethodException | InstantiationException | IllegalAccessException | InvocationTargetException e) {
        e.printStackTrace();
    }
// 获取网络请求中的参数名列表
    Enumeration<String> parameterNames = request.getParameterNames();

// 遍历参数名
    while (parameterNames.hasMoreElements()) {

      // 迭代遍历, parameterKey 为迭代的到的参数名
        String parameterKey = parameterNames.nextElement();

            // 参数名大写
        String upperCase = parameterKey.toUpperCase();

        // 获取参数对应的值
        String[] parameterValues = request.getParameterValues(parameterKey);
        Method method = null;

        // 获取参数对应的Setter方法，比如参数名是username，此处set方法就是setUserName，这样实现很不规范
        String getMethod = "set" + parameterKey.replace(parameterKey.charAt(0), upperCase.charAt(0));
        try {
            // 判断参数值的数目, 
            if (parameterValues.length != 1) {
                // 反射获取"com.example.homework2.User"类中的指定方法，如setUserName方法
                method = userClass.getMethod(getMethod, String[].class);
              // 反射调用方法，设置值
                method.invoke(user, (Object) parameterValues);
            } else {
              // 同事
                method = userClass.getMethod(getMethod, String.class);
                method.invoke(user, parameterValues[0]);
            }
 } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        }
    }
// 打印最后的用户信息
    System.out.println(user);

这个实现有点粗糙，不太实用，可以考虑使用框架实现