java对象复制和属性值复制工具类

两个不同类型的对象中有字段名称不区分大小写的情况下一样，字段含义一样，需要组装到另一个对象中去，然后就写了一个这种工具类
我的类型比较特殊，老系统和新系统的对象命名大小写命名不一致，并且字段相同类型也有不一致的情况，所以自己写了一个，
不是很完美基本能用。

温馨提示：
如果同一种类型的对象 属性字段名equals相等 并且类型一致。则完全可以用commons-beanutils包或者spring包中
的BeanUtils工具类中的copey属性方法。

/** * 实体类字段值相同的复制 * * @author [e-mail] 2017年8月18日 */public class CopyBeanUtil {    static Logger log = LoggerFactory.getLogger(CopyBeanUtil.class);    /**     * 复制sour里属性不为空的值到obje为空的属性     *     * @param obje    目标实体类     * @param sour    源实体类     * @param isCover 是否保留obje类里不为null的属性值(true为保留源值，属性为null则赋值)     * @return obje     */    public static Object Copy(Object obje, Object sour, boolean isCover) {        Field[] fields = sour.getClass().getDeclaredFields();        for (int i = 0, j = fields.length; i < j; i++) {            String propertyName = fields[i].getName();            Object propertyValue = getProperty(sour, propertyName);            if (isCover) {                if (getProperty(obje, propertyName) == null && propertyValue != null) {                    Object setProperty = setProperty(obje, propertyName, propertyValue);                }            } else {                Object setProperty = setProperty(obje, propertyName, propertyValue);            }        }        return obje;    }    /**     * 复制sour里属性不为空的值到obj里并相加     *     * @param obj     目标实体类     * @param sour    源实体类     * @param isCover     * @return obj     */    public static Object CopyAndAdd(Object obj, Object sour, boolean isCover) {        Field[] fields = sour.getClass().getDeclaredFields();        for (int i = 0, j = fields.length; i < j; i++) {            String propertyName = fields[i].getName();            Object sourPropertyValue = getProperty(sour, propertyName);            Object objPropertyValue = getProperty(obj, propertyName);            if (isCover) {                if (objPropertyValue == null && sourPropertyValue != null) {                    Object setProperty = setProperty(obj, propertyName, sourPropertyValue);                } else if (objPropertyValue != null && sourPropertyValue == null) {                    Object setProperty = setProperty(obj, propertyName, objPropertyValue);                } else if (objPropertyValue != null && sourPropertyValue != null) {                    Object setProperty = setProperty(obj, propertyName, ((int) sourPropertyValue) + (int) objPropertyValue);                }            }        }        return obj;    }    /**     * 得到值     *     * @param bean     * @param propertyName     * @return     */    private static Object getProperty(Object bean, String propertyName) {        Class clazz = bean.getClass();        try {            Field field = clazz.getDeclaredField(propertyName);            Method method = clazz.getDeclaredMethod(getGetterName(field.getName(),field.getType()), new Class[]{});            return method.invoke(bean, new Object[]{});        } catch (Exception e) {        }        return null;    }    /**     * 给bean赋值     *     * @param bean     * @param propertyName     * @param value     * @return     */    private static Object setProperty(Object bean, String propertyName, Object value) {        Class clazz = bean.getClass();        try {            Field field = clazz.getDeclaredField(propertyName);            Method method = clazz.getDeclaredMethod(getSetterName(field.getName()), new Class[]{field.getType()});            return method.invoke(bean, new Object[]{value});        } catch (Exception e) {        }        return null;    }    /**     * 根据变量名得到get方法     *     * @param propertyName     * @return     */    private static String getGetterName(String propertyName) {        String method ;        if( propertyName.length()>1&& Character.isUpperCase(propertyName.charAt(1))){             method = "get" +propertyName;        }else{            method = "get" + propertyName.substring(0, 1).toUpperCase() + propertyName.substring(1);        }        return method;    }    /**     * 根据变量名和类型获取getter方法     * @param propertyName     * @param type     * @return     */    private static String getGetterName(String propertyName, Class<?> type) {        String method ;        if(type==Boolean.class|| type==boolean.class){            if("is".equalsIgnoreCase(propertyName.substring(0, 2))){                return propertyName;            }else{                return "is" + propertyName.substring(0, 1).toUpperCase() + propertyName.substring(1);            }        }        if( propertyName.length()>1&& Character.isUpperCase(propertyName.charAt(1))){            method = "get" +propertyName;        }else{            method = "get" + propertyName.substring(0, 1).toUpperCase() + propertyName.substring(1);        }        return method;    }    /**     * 得到setter方法     *     * @param propertyName 变量名     * @return     */    private static String getSetterName(String propertyName) {//        String method = "set" + propertyName.substring(0, 1).toUpperCase() + propertyName.substring(1);        String method ;        if( propertyName.length()>1&& Character.isUpperCase(propertyName.charAt(1))){            method = "set" +propertyName;        }else{            method = "set" + propertyName.substring(0, 1).toUpperCase() + propertyName.substring(1);        }        return method;    }    /**     * 父类集合转成子类集合集合通用方法(子类集合接收父类集合)     *     * @param list 父类集合     * @param <T>  子类     * @param <E>  父类     * @return     */    public static <T, E> List<T> chang2ChildClassList(List<E> list) {        List<T> alist = new ArrayList<>();        for (E o : list) {            alist.add((T) o);        }        return alist;    }    /**     * 属性copy  复制sour里属性和obje里属性值忽略大小写相同的 ，不为空的值赋值到obje里     * 如果存在属性复杂类型并为有效值慎用或改进     *     * @param obje     * @param sour     * @param isCover 是否保留obje里面属性值不为空的字段值     * @return     */    public static Object copyByIgnoreCase(Object obje, Object sour, boolean isCover) {        try {            Field[] objFields = obje.getClass().getDeclaredFields();            Field[] sourFields = sour.getClass().getDeclaredFields();            for (int i = 0; i < sourFields.length; i++) {                String sourPropertyName = sourFields[i].getName();                //获取来源对象的属性值                Object propertyValue = getSourPropertyValue(sour, sourPropertyName);                for (int j = 0; j < objFields.length; j++) {                    try {                        String objPropertyName = objFields[j].getName();                        if (objPropertyName.equalsIgnoreCase(sourPropertyName)) {                            if (isCover) {                                if (getProperty(obje, objPropertyName) == null && propertyValue != null) {                                    setObjProperty(obje, objPropertyName, propertyValue);                                }                            } else {                                setObjProperty(obje, objPropertyName, propertyValue);                            }                            break;                        }                    } catch (Exception e) {                        log.error("给目标bean赋值出错,objPropertyName:{},value:{}",sourPropertyName,propertyValue,e);                        e.printStackTrace();                    }                }            }        } catch (SecurityException e) {            e.printStackTrace();            log.error("给目标bean赋值出错,obje:{},sour:{}", JSON.toJSONString(obje), JSON.toJSONString(sour),e);        }        return obje;    }    /**     * 根据属性名获取的值     *     * @param sourceBean     * @param sourcePropertyName     * @return     */    private static Object getSourPropertyValue(Object sourceBean, String sourcePropertyName) {        Class clazz = sourceBean.getClass();        try {            Field field = clazz.getDeclaredField(sourcePropertyName);            Method method = clazz.getDeclaredMethod(getGetterName(field.getName(),field.getType()), new Class[]{});            return method.invoke(sourceBean, new Object[]{});        } catch (Exception e) {            log.error("获取属性名（不区分大小写）相似的值赋值出差", e);        }        return null;    }    /**     * 给目标bean赋值     *     * @param objBean     * @param sourcePropertyName     * @param value     * @return     */    private static Object setObjPropertyBySourceProperty(Object objBean, String sourcePropertyName, Object value) {        Class clazz = objBean.getClass();        Field[] fields = clazz.getDeclaredFields();        try {            for (int i = 0, j = fields.length; i < j; i++) {                String propertyName = fields[i].getName();                if (sourcePropertyName.equalsIgnoreCase(propertyName)) {                    Field field = clazz.getDeclaredField(propertyName);                    if (field.getType() == BigDecimal.class) {                        if (value instanceof String) {                            value = new BigDecimal(String.valueOf(value));                        } else if (value instanceof Integer || value instanceof Double) {//                          传double直接new BigDecimal，数会变大                            value = BigDecimal.valueOf(Double.parseDouble(String.valueOf(value)));                        }                    }                    if (field.getType() == Double.class || field.getType() == double.class) {                        if (value instanceof BigDecimal) {                            DecimalFormat df = new DecimalFormat("#.000000");                            Double v = Double.parseDouble(String.valueOf(value));                            value = df.format(v);                        }                    }                    Method method = clazz.getDeclaredMethod(getSetterName(field.getName()), new Class[]{field.getType()});                    return method.invoke(objBean, new Object[]{value});                }            }        } catch (Exception e) {        }        return null;    }    /**     * 给目标bean赋值     *     * @param objBean     * @param propertyName     * @param value     * @return     */    private static Object setObjProperty(Object objBean, String propertyName, Object value) {        Class clazz = objBean.getClass();        try {            Field field = clazz.getDeclaredField(propertyName);            if (field.getType() == BigDecimal.class) {                if (value instanceof String) {                    value = new BigDecimal(String.valueOf(value));                } else if (value instanceof Integer || value instanceof Double) {//                          传double直接new BigDecimal，数会变大                    value = BigDecimal.valueOf(Double.parseDouble(String.valueOf(value)));                }            }            if (field.getType() == Double.class || field.getType() == double.class) {                if (value instanceof BigDecimal) {                    DecimalFormat df = new DecimalFormat("#.000000");                    Double v = Double.parseDouble(String.valueOf(value));                    value =new BigDecimal(df.format(v));                }            }            if (field.getType() == Integer.class || field.getType() == int.class) {                if (value instanceof Float) {                     value = Math.round(Float.parseFloat(String.valueOf(value)));                }            }            Method method = clazz.getDeclaredMethod(getSetterName(field.getName()), new Class[]{field.getType()});            log.info("给目标bean赋值,propertyName:{},value:{}",propertyName,value);            Object obj = method.invoke(objBean, new Object[]{value});            return obj;        } catch (Exception e) {            log.error("给目标bean赋值出错,propertyName:{},value:{}",propertyName,value,e);        }        return null;    }    public static void main(String[] args) {//        ReAlarmResult re= new ReAlarmResult();//        re.setAlarmContent("sdfsdfsd");//        re.setBlat(2.234343);//        re.setBlon(34.34324);//        ReAlarmResult s = new ReAlarmResult();//        s.setAlarmContent("222");//        copyByIgnoreCase(s,re,true);//        System.out.printf(JSON.toJSONString(s));//        BeanUtils.copyProperties();        //BeanUtils.copyProperties();    }}