Java如何通过反射取实体类字段取值

public class Test {
	public static void main(String[] args) throws NoSuchFieldException, IllegalAccessException {
		GasDay gasDay = new GasDay();
		gasDay.setOutputcode("Ccccc");

		for (Field field: GasDay.class.getDeclaredFields()){
			String name = field.getName();//name就是实体类GasDay的所有字段
			
			System.out.println(String.format("r.linan.wastegas.day.%s", name));
			
			Field declaredField = GasDay.class.getDeclaredField(name);
			declaredField.setAccessible(true);

			System.out.println(String.format("name %s value %s", name, declaredField.get(gasDay)));//declaredField.get(gasDay)就是实体类GasDay中所有值
		}
	}
}

public class test1 {
    public static void main(String[] args) throws IllegalAccessException {
 
        demoEntity entity=new demoEntity();
        entity.aa="1111";
        entity.bb="2222";
        entity.cc="3333";
 
        for (Field field:entity.getClass().getDeclaredFields()){
            // 一定要设置setAccessible为ture
            field.setAccessible(true);
 
            System.out.println("实体字段名："+field.getName());
            System.out.println("实体字段值："+field.get(entity));
        }
    }
}

public class demoEntity {
    public String aa;
    public String bb;
    public String cc;
 
    public String getAa() {
        return aa;
    }
 
    public void setAa(String aa) {
        this.aa = aa;
    }
 
    public String getBb() {
        return bb;
    }
 
    public void setBb(String bb) {
        this.bb = bb;
    }
 
    public String getCc() {
        return cc;
    }
 
    public void setCc(String cc) {
        this.cc = cc;
    }
}