从html中传递的对象中提取额外的Java属性

// HTML表单
<form action="/submit" method="post">
  <input type="text" name="name" />
  <input type="text" name="age" />
  <input type="text" name="extraProperty" />
  <input type="submit" value="Submit" />
</form>

// Java代码
@Controller
public class FormController {
  @PostMapping("/submit")
  public String submitForm(HttpServletRequest request) {
    String name = request.getParameter("name");
    String age = request.getParameter("age");
    String extraProperty = request.getParameter("extraProperty");

    // 创建Java对象
    User user = new User();
    user.setName(name);
    user.setAge(Integer.parseInt(age));
    user.setExtraProperty(extraProperty);

    // 获取额外的Java属性
    String extractedProperty = user.getExtraProperty();

    // 其他处理逻辑...

    return "result";
  }
}

// User类
public class User {
  private String name;
  private int age;
  private String extraProperty;

  // 省略构造函数和其他属性访问器

  public String getExtraProperty() {
    return extraProperty;
  }

  public void setExtraProperty(String extraProperty) {
    this.extraProperty = extraProperty;
  }
}