Java工具：自定义注解实体与json相互转换

package com.zycfc.zsf.boot.outreach.util;
import java.lang.reflect.Field;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import lombok.Data;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.NoArgsConstructor;
@Data
@Builder
@AllArgsConstructor //全参构造
public class Student{

	public static void main(String[] args) throws Exception {
		//根据对象中注解转化不同的json字符串	
	/*	Student stu = Student.builder().name("xiaoming").age("18").build();
		String jsonStr=JSON.toJSONString(returnJsonString(stu));*/
		
	}
	// 根据注解对象转json
	public static Map returnJsonString(Object obj) throws IllegalArgumentException, IllegalAccessException {
		HashMap map = Maps.newHashMap();
		Field[] fields = obj.getClass().getFields();
		for (Field field : fields) {
			ChanFld chanFld = field.getDeclaredAnnotation(ChanFld.class);
			if (chanFld != null) {
				Class type = field.getType();
				// 如果是基础数据类型
				if (type == String.class || type == Boolean.class || type == BigDecimal.class
						|| type == boolean.class) {
					map.put(chanFld.name(), field.get(obj));
					continue;
				}
				// 如果是list
				if (type == List.class) {
					List