import java.lang.reflect.Field;

/**
 * 
 * @author EX-QINCIDONG001
 *
 */
public class ReflectClass {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Person p = new Person();
		p.setId(0);
		p.setName("張三");
		reflect(p);
	}
	
	public static void reflect(Object obj) {
		if (obj == null) return;
		Field[] fields = obj.getClass().getDeclaredFields();
		for (int j = 0; j < fields.length; j++) {
			fields[j].setAccessible(true);
			// 欄位名
			System.out.print(fields[j].getName() + ",");
			// 欄位值
			if (fields[j].getType().getName().equals(
					java.lang.String.class.getName())) {
				// String type
				try {
					System.out.print(fields[j].get(obj));
				} catch (IllegalArgumentException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (IllegalAccessException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			} else if (fields[j].getType().getName().equals(
					java.lang.Integer.class.getName())
					|| fields[j].getType().getName().equals("int")) {
				// Integer type
				try {
					System.out.println(fields[j].getInt(obj));
				} catch (IllegalArgumentException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (IllegalAccessException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
			// 其他型別。。。
		}
		System.out.println();
	}
}

class Person {
	private int id;
	private String name;

	public int getId() {
		return this.id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getName() {
		return this.name;
	}

	public void setName(String name) {
		this.name = name;
	}

}
 

結果：

id,0
name,張三