BeanUtil為拷貝類，list,map的工具類，類似BeansUtils

package com.gy.util;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.math.BigDecimal;
import java.sql.ResultSet;
import java.util.*;

/**
 * 此類為重寫BeanUtils.copyProperties方法，其他包含List等情況，可以擴充套件重寫
 *
 * @author chenhs
 * @version 20170728
 
 *
 */
public class BeanUtil {
    /**
     * @param target  目標類
     * @param source  原類
     * @param objects 物件集合
     */
public static void copyProperties(Object target, Object source, Object... objects) {
        try {
            Class clazz1 = source.getClass();
            Class clazz2 = target.getClass();
            Field[] fields1 = clazz1.getDeclaredFields();
            Field[] fields2 = clazz2.getDeclaredFields();
            for 
 
(Field field1 : fields1) {
                String name1 = field1.getName();
                Method m = clazz1.getMethod("get" + toUpcase(name1));
                for (Field field2 : fields2) {
                    String name2 = field2.getName();
                    if (name1.equals(name2)) {
                        field2.setAccessible(true
 
);
                        if (m.invoke(source) != null) {
                            field2.set(target, m.invoke(source));
                        }
                    }
                    //判斷objects
if (objects.length > 0) {
                        HashMap<String, Object> paramMap = (HashMap<String, Object>) objects[0];
                        if (paramMap.get(name2) != null) {
                            field2.setAccessible(true);
                            field2.set(target, paramMap.get(name2));
                        }
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * @param target  目標類
     * @param map  原類
     */
public static void copyMapProperties(Object target, Map<String,Object> map) {
        try {
            Class clazz2 = target.getClass();
            Field[] fields2 = clazz2.getDeclaredFields();
            for (String key : map.keySet()) {
                String name1 = key;
                Object value =(Object) map.get(key);
                for (Field field2 : fields2) {
                    String name2 = field2.getName();
                    if (name1.toUpperCase().equals(name2.toUpperCase())) {
                        field2.setAccessible(true);
                        if (value != null) {
                            field2.set(target, value);
                        }
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    /**
     * 如果某個引數為固定值，則可以加以下物件objects，如：
     * paramMap.put("userId", "aaaaaaaaaaa");
     * paramMap.put("num", 777777777);固定值
     *
     * @param list    源list
     * @param target  目標類CLASS
     * @param objects 物件集合
     * @return list
     */
public static List<?> copyPropertiesList(List<?> list, Class target, Object... objects) {
        List<Object> result = new ArrayList();
        if (list != null) {
            for (Object o : list) {
                try {
                    Object d = target.newInstance();
                    copyProperties(d, o, objects);
                    result.add(d);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
        return result;
    }

    /***
     * 此方法為jdbc中呼叫指生成結果的方法,其他型別可以繼續新增....
     * *@author  chenhs
     * update wmk
     *
     * @param clazz 類
     * @param rs    結果集合
     * @return object
     * @date 2015/11/19
     */
public static Object getBeanForRs(Class clazz, ResultSet rs) {
        try {
            Object target = clazz.newInstance();
            Field[] fields = clazz.getDeclaredFields();
            for (Field field : fields) {
                String name = field.getName();
                field.setAccessible(true);
                Class type = field.getType();
                try {
                    if (type.equals(String.class)) {
                        field.set(target, rs.getString(name));
                    } else if (type.equals(Integer.class)) {
                        field.set(target, rs.getInt(name));
                    } else if (type.equals(Long.class)) {
                        field.set(target, rs.getLong(name));
                    } else if (type.equals(Float.class)) {
                        field.set(target, rs.getFloat(name));
                    } else if (type.equals(BigDecimal.class)) {
                        field.set(target, rs.getBigDecimal(name));
                    } else if(type.equals(UUID.class)){
                        field.set(target, UUID.fromString(rs.getString(name)));
                    } else if(type.equals(Date.class)){
                        field.set(target,rs.getDate(name));
                    }
                } catch (Exception e) {
                    System.out.println(e.getMessage());
                }
            }
            return target;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }


    /**
     * 首字母轉大寫
     *
     * @param s 字串
     * @return stirng
     * update wmk
     */
private static String toUpcase(String s) {
        return s.substring(0, 1).toUpperCase() + s.substring(1, s.length());
    }
}