Java Reflection - 获取现有对象中的当前字段值

Question

我有一个以下类型的构造对象，

public class Form {
   private String a;
   private String b;
   private Boolean c;

   public String getA() { return a; }
   public void setA (String a) { this.a = a; }
   public String getB() { return b; }
   public void setB (String b) { this.b = b; }
   public Boolean getC() { return c; }
   public void setC (Boolean c) { this.c = c; }
}

我正在使用反射来检查现有对象，例如此表单:("testA", "testB", False)

如何获取特定字段的当前值(例如 String b)？

// Assume "form" is my current Form object
Field[] formFields = form.getClass().getDeclaredFields();
if (formFields != null) {
   for (Field formField : formFields) { 
       Class type = formField.getType();
       // how do I get the current value in this current object?
   }
}

Answer 1

java.lang.reflect.Field的使用方法:

// Necessary to be able to read a private field
formField.setAccessible(true);

// Get the value of the field in the form object
Object fieldValue = formField.get(form);