对象转HashMap

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class ObjectToMap {
	

	public static void main(String[] args) throws Exception {
		  TestData o =new ObjectToMap().new TestData();
		  o.setAge(20);
		  o.setName("张三");
		  Hobby m = new ObjectToMap().new Hobby();
		  m.setDesc("书");
		  m.setID(1);
		  Hobby n = new ObjectToMap().new Hobby();
		  n.setDesc("画");
		  n.setID(2);
          ArrayList<Hobby> hobby = new ArrayList<Hobby>();
          hobby.add(m);
          hobby.add(n);
          o.setHobby(hobby);
          Map<String, Object> mapData = new HashMap<String, Object>();
	      parseObject(mapData ,o);
	      System.out.println(mapData);
          
	}

	protected static void parseObject(Map<String, Object> mapData, TestData object) throws Exception {
		Class cls = TestData.class;
		while (!cls.equals(Object.class)) {
			Field[] fields = cls.getDeclaredFields();
			for (Field field : fields) {
				field.setAccessible(true);
				if (field.get(object) != null) {
					mapData.put(field.getName(), formatRequestData(field.get(object)));
				}
			}
			cls = cls.getSuperclass();
		}
	}
	protected static Object formatRequestData(Object value) throws Exception {
		if (value.getClass().equals(String.class))
			return value;
		if (value instanceof List) {
			List<Map<String, Object>> resultList = new ArrayList<Map<String, Object>>();
			for (Object obj : (List) value) {
					Map<String, Object> tempMap = new HashMap<String, Object>();
					Class cls = obj.getClass();
					Field[] fields = cls.getDeclaredFields();
					for (Field field : fields) {
						field.setAccessible(true);
						if (field.get(obj) != null) {
							tempMap.put(field.getName(), formatRequestData(field.get(obj)));
						}
					}
				resultList.add(tempMap);
			}
			return resultList;

		}
		return value;
	}
	class TestData{
		private String name;
		private int  age;
		private ArrayList<Hobby> hobby;
		TestData(){}
		public String getName() {
			return name;
		}
		public void setName(String name) {
			this.name = name;
		}
		public int getAge() {
			return age;
		}
		public void setAge(int age) {
			this.age = age;
		}
		public ArrayList<Hobby> getHobby() {
			return hobby;
		}
		public void setHobby(ArrayList<Hobby> hobby) {
			this.hobby = hobby;
		}
		
	}
	class Hobby {
		private int ID ;
		private String  desc;
		public int getID() {
			return ID;
		}
		public void setID(int iD) {
			ID = iD;
		}
		public String getDesc() {
			return desc;
		}
		public void setDesc(String desc) {
			this.desc = desc;
		}
		

	}


}