通过反射来实现List转为JSON

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class IteratorUtil<T> {

    /**
     * 将List格式转换为JSONArray格式
     * @param list
     * @param <T>
     * @return
     */
    public static <T> JSONArray convertToJson(List<T> list){
        if (list.size()==0){
            System.out.println("list 为空");
            return null;
        }
        Class clazz = list.get(0).getClass();
        Method[]methods = clazz.getMethods();
        List<Method>getMethods = new ArrayList<>();
        for (Method method:methods){
            if (method.getName().matches("get[A-z]*")&&method.getDeclaringClass().equals(clazz)){
                getMethods.add(method);
            }
        }
        Iterator<T> iterator = list.iterator();
        JSONArray jsonArray = null;
        JSONObject jsonObject;
        try {
            jsonArray = new JSONArray();
            while (iterator.hasNext()){
                jsonObject = new JSONObject();
                Object instance  = iterator.next();
                Iterator<Method> methodIterator = getMethods.iterator();
                while (methodIterator.hasNext()){
                    Method method = methodIterator.next();
                    Object value = method.invoke(instance,new Object[]{});
                    String field = method.getName().substring(3,4).toLowerCase()+method.getName().substring(4);
                    jsonObject.put(field,value);
                }
                jsonArray.add(jsonObject);
            }
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }finally {
            return jsonArray;
        }
    }

}