All Downloads are FREE. Search and download functionalities are using the official Maven repository.

com.feingto.cloud.kit.ObjectKit Maven / Gradle / Ivy

Go to download

There is a newer version: 2.5.2.RELEASE
Show newest version
package com.feingto.cloud.kit;

import com.feingto.cloud.kit.json.JSON;
import com.feingto.cloud.kit.reflection.ReflectionKit;
import org.apache.commons.beanutils.BeanUtils;

import java.io.*;
import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Array;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.math.BigDecimal;
import java.util.*;

/**
 * 对象转换工具
 *
 * @author longfei
 */
@SuppressWarnings("unchecked")
public class ObjectKit {
    private static final String[] IGNORE_FIELD_NAMES = new String[]{"log", "logger", "serialVersionUID"};
    private static final String[] IGNORE_FIELD_CLASSES = new String[]{"org.apache.log4j.Logger", "org.slf4j.Logger",
            "org.slf4j.LoggerFactory", "java.kit.logging.Logger", "java.lang.Object", "java.lang.Class",
            "java.lang.reflect.AccessibleObject", "java.lang.reflect.Field", "java.lang.reflect.Method",
            "java.lang.reflect.Constructor"};

    /**
     * Returns a copy of the object, or null if the object cannot be serialized.
     *
     * @param obj Object
     * @return a deep copy of that Object
     * @throws NotSerializableException if an error occurs
     */
    public static Object copy(Object obj) throws NotSerializableException {
        Object _obj = null;
        try {
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            ObjectOutputStream out = new ObjectOutputStream(bos);
            out.writeObject(obj);
            out.flush();
            out.close();

            ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(bos.toByteArray()));
            _obj = in.readObject();
        } catch (NotSerializableException e) {
            throw e;
        } catch (IOException | ClassNotFoundException e) {
            e.printStackTrace();
        }
        return _obj;
    }

    /**
     * 深复制
     *
     * @param bean Object
     * @return T
     */
    public static  T clone(Object bean) {
        return clone(bean, (Class) bean.getClass());
    }

    /**
     * 深复制
     *
     * @param bean Collection
     * @return List
     */
    public static  List clone(Collection bean) {
        return clone(bean, (Class) bean.getClass());
    }

    /**
     * 深复制
     *
     * @param bean  Object
     * @param clazz Class
     * @return T
     */
    public static  T clone(Object bean, Class clazz) {
        return JSON.json2pojo(JSON.obj2json(bean), clazz);
    }

    /**
     * 深复制
     *
     * @param bean  Collection
     * @param clazz Class
     * @return List
     */
    public static  List clone(Collection bean, Class clazz) {
        return JSON.json2list(JSON.obj2json(bean), clazz);
    }

    /**
     * 判断对象是否为空
     *
     * @param obj Object
     * @return boolean
     */
    public static boolean isEmpty(Object obj) {
        return Objects.isNull(obj) || obj.getClass().isArray() && Array.getLength(obj) == 0 ||
                obj instanceof Collection && ((Collection) obj).isEmpty() ||
                obj instanceof Map && ((Map) obj).isEmpty();
    }

    /**
     * 对象转换集合
     *
     * @param obj Object
     * @return boolean
     */
    public static Collection objectToCollection(Object obj) {
        if (Objects.isNull(obj) || obj == "") {
            return new ArrayList<>();
        }

        Collection collection;
        if (obj instanceof Collection) {
            collection = (Collection) obj;
        } else if (obj instanceof Map) {
            collection = ((Map) obj).entrySet();
        } else if (obj.getClass().isArray()) {
            collection = new ArrayList<>();
            int length = Array.getLength(obj);
            for (int i = 0; i < length; i++) {
                Object value = Array.get(obj, i);
                collection.add(value);
            }
        } else {
            collection = new ArrayList<>();
            collection.add(obj);
        }
        return collection;
    }

    public static Object[] collectionToObject(Collection collection) {
        return collection.toArray(new Object[0]);
    }

    public static  T mapToObject(Class clazz, Map map) {
        try {
            T m = clazz.newInstance();
            BeanUtils.populate(m, map);
            return m;
        } catch (IllegalAccessException | InvocationTargetException | InstantiationException e) {
            e.printStackTrace();
            return null;
        }
    }

    public static  List mapToList(Class clazz, List> listMap) {
        List list = new ArrayList<>();
        for (Object map : listMap) {
            list.add(mapToObject(clazz, (Map) map));
        }
        return list;
    }

    public static boolean isIgnoreField(Field field) {
        return Objects.nonNull(field) && (isIgnoreFieldByName(field) || isIgnoreFieldByClass(field));
    }

    private static boolean isIgnoreFieldByName(Field field) {
        for (String fieldName : IGNORE_FIELD_NAMES) {
            if (fieldName.equals(field.getName())) {
                return true;
            }
        }
        return field.getName().contains("this$");
    }

    private static boolean isIgnoreFieldByClass(Field field) {
        Class clazz;
        for (String className : IGNORE_FIELD_CLASSES) {
            clazz = ReflectionKit.forName(className);
            if (Objects.nonNull(clazz) && clazz.isAssignableFrom(field.getType())) {
                return true;
            }
        }
        return false;
    }

    public static String toString(Object obj) {
        if (Objects.isNull(obj)) {
            return "null";
        } else {
            Class clazz = obj.getClass();
            if (!clazz.equals(Object.class) && !clazz.equals(Class.class)) {
                if (ClassKit.isJavaBasicType(clazz)) {
                    return obj.toString();
                } else {
                    StringBuilder sb = new StringBuilder();
                    if (clazz.isArray()) {
                        if (ClassKit.isPrimitiveArray(clazz)) {
                            Object[] objs = new Object[]{obj};
                            sb.append(clazz.getSimpleName()).append("=");
                            String objsStr = Arrays.deepToString(objs);
                            sb.append(objsStr, 1, objsStr.length() - 1);
                            return sb.toString();
                        } else {
                            return toString(obj);
                        }
                    } else if (Collection.class.isAssignableFrom(clazz)) {
                        return toString(obj);
                    } else if (Map.class.isAssignableFrom(clazz)) {
                        return toString(obj);
                    } else {
                        sb.append(clazz.getSimpleName()).append("{");
                        Field[] fields = ClassKit.getAllField(clazz);
                        if (fields.length > 0) {
                            boolean isAppend = false;
                            AccessibleObject.setAccessible(fields, true);
                            for (Field field : fields) {
                                if (!isIgnoreField(field)) {
                                    isAppend = true;
                                    sb.append(field.getName()).append("=");
                                    try {
                                        sb.append(toString(field.get(obj))).append(",");
                                    } catch (Exception var10) {
                                        sb.append("???,");
                                    }
                                }
                            }
                            if (isAppend) {
                                sb.deleteCharAt(sb.length() - 1);
                            }
                        }
                        sb.append("}");
                        return sb.toString();
                    }
                }
            } else {
                return obj.toString();
            }
        }
    }

    /**
     * 字符串转Double
     */
    public static Double obj2double(Object obj) {
        if (obj instanceof BigDecimal) {
            return ((BigDecimal) obj).doubleValue();
        } else {
            return Double.parseDouble(String.valueOf(obj));
        }
    }
}
 















© 2015 - 2024 Weber Informatics LLC | Privacy Policy