两个实体复制

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package com.datad.dream.utils;

import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.util.Iterator;
import java.util.Map;

import org.apache.commons.beanutils.DynaBean;
import org.apache.commons.beanutils.DynaProperty;
import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.beanutils.PropertyUtilsBean;
import org.apache.commons.collections.map.LinkedMap;

/**
 * <p>
 * Title:JavaBean对象转换工具类
 * </p>
 * <p>
 * Description:复制两个不同Bean的相同属性值；
 * </p>
 *
 * @author Lion
 * @version 2.0
 */

public class MyBeanUtils extends PropertyUtilsBean {

    public MyBeanUtils() {
        super();
    }

    private static void convert(Object dest, Object orig) throws IllegalAccessException, InvocationTargetException {
        if (dest == null) {
            throw new IllegalArgumentException("No destination bean specified");
        }
        if (orig == null) {
            throw new IllegalArgumentException("No origin bean specified");
        }
        if (orig instanceof DynaBean) {
            DynaProperty origDescriptors[] = ((DynaBean) orig).getDynaClass()
                    .getDynaProperties();
            for (int i = 0; i < origDescriptors.length; i++) {
                String name = origDescriptors[i].getName();
                if (PropertyUtils.isWriteable(dest, name)) {
                    Object value = ((DynaBean) orig).get(name);
                    try {
                        getInstance().setSimpleProperty(dest, name, value);
                    } catch (Exception e) {
                        ; // Should not happen
                    }
                }
            }
        } else if (orig instanceof Map) {
            Iterator names = ((Map) orig).keySet().iterator();
            while (names.hasNext()) {
                String name = (String) names.next();
                if (PropertyUtils.isWriteable(dest, name)) {
                    Object value = ((Map) orig).get(name);
                    try {
                        getInstance().setSimpleProperty(dest, name, value);
                    } catch (Exception e) {
                        ; // Should not happen
                    }
                }
            }
        } else {
            PropertyDescriptor origDescriptors[] = PropertyUtils
                    .getPropertyDescriptors(orig);
            for (int i = 0; i < origDescriptors.length; i++) {
                String name = origDescriptors[i].getName();
                if ("class".equals(name)) {
                    continue;
                }
                if (PropertyUtils.isReadable(orig, name)
                        && PropertyUtils.isWriteable(dest, name)) {
                    try {
                        Object value = PropertyUtils.getSimpleProperty(orig,
                                name);
                        getInstance().setSimpleProperty(dest, name, value);
                    } catch (IllegalArgumentException ie) {
                        ; // Should not happen
                    } catch (Exception e) {

                    }

                }
            }
        }

    }

    /**
     * 对象拷贝 数据对象空值不拷贝到目标对象
     *
     * @param dataObject
     * @param toObject
     * @throws NoSuchMethodException copy
     */
    public static void copyBeanNotNull2Bean(Object databean, Object tobean)
            throws Exception {
        PropertyDescriptor origDescriptors[] = PropertyUtils
                .getPropertyDescriptors(databean);
        for (int i = 0; i < origDescriptors.length; i++) {
            String name = origDescriptors[i].getName();
            if ("class".equals(name)) {
                continue;
            }
            if (PropertyUtils.isReadable(databean, name)
                    && PropertyUtils.isWriteable(tobean, name)) {
                try {
                    Object value = PropertyUtils.getSimpleProperty(databean,
                            name);
                    if (value != null) {
                        getInstance().setSimpleProperty(tobean, name, value);
                    }
                } catch (IllegalArgumentException ie) {
                    ; // Should not happen
                } catch (Exception e) {
                    ; // Should not happen
                }

            }
        }
    }

    /**
     * 把orig和dest相同属性的value复制到dest中
     *
     * @param dest
     * @param orig
     * @throws IllegalAccessException
     * @throws InvocationTargetException
     */
    public static void copyBean2Bean(Object dest, Object orig) throws Exception {
        if (orig == null) {
            dest = null;
            return;
        }
        convert(dest, orig);
    }

    public static void copyBean2Map(Map map, Object bean) {
        PropertyDescriptor[] pds = PropertyUtils.getPropertyDescriptors(bean);
        for (int i = 0; i < pds.length; i++) {
            PropertyDescriptor pd = pds[i];
            String propname = pd.getName();
            try {
                Object propvalue = PropertyUtils.getSimpleProperty(bean,
                        propname);
                map.put(propname, propvalue);
            } catch (IllegalAccessException e) {
                // e.printStackTrace();
            } catch (InvocationTargetException e) {
                // e.printStackTrace();
            } catch (NoSuchMethodException e) {
                // e.printStackTrace();
            }
        }
    }

    /**
     * 将Map内的key与Bean中属性相同的内容复制到BEAN中
     *
     * @param bean       Object
     * @param properties Map
     * @throws IllegalAccessException
     * @throws InvocationTargetException
     */
    public static void copyMap2Bean(Object bean, Map properties) throws IllegalAccessException, InvocationTargetException {
        if ((bean == null) || (properties == null)) {
            return;
        }
        Iterator names = properties.keySet().iterator();
        while (names.hasNext()) {
            String name = (String) names.next();
            if (name == null) {
                continue;
            }
            Object value = properties.get(name);
            try {
                Class clazz = PropertyUtils.getPropertyType(bean, name);
                if (null == clazz) {
                    continue;
                }
                String className = clazz.getName();
                if (className.equalsIgnoreCase("java.sql.Timestamp")) {
                    if (value == null || value.equals("")) {
                        continue;
                    }
                }
                getInstance().setSimpleProperty(bean, name, value);
            } catch (NoSuchMethodException e) {
                continue;
            }
        }
    }

    /**
     * 自动转Map key值大写 将Map内的key与Bean中属性相同的内容复制到BEAN中
     *
     * @param bean       Object
     * @param properties Map
     * @throws IllegalAccessException
     * @throws InvocationTargetException
     */
    public static void copyMap2Bean_Nobig(Object bean, Map properties)
            throws IllegalAccessException, InvocationTargetException {
        if ((bean == null) || (properties == null)) {
            return;
        }
        Iterator names = properties.keySet().iterator();
        while (names.hasNext()) {
            String name = (String) names.next();
            if (name == null) {
                continue;
            }
            Object value = properties.get(name);
            // 命名应该大小写应该敏感(否则取不到对象的属性)
            try {
                if (value == null) { // 不光Date类型，好多类型在null时会出错
                    continue; // 如果为null不用设 (对象如果有特殊初始值也可以保留？)
                }
                Class clazz = PropertyUtils.getPropertyType(bean, name);
                if (null == clazz) { // 在bean中这个属性不存在
                    continue;
                }
                String className = clazz.getName();
                // 临时对策（如果不处理默认的类型转换时会出错）
                if (className.equalsIgnoreCase("java.util.Date")) {
                    value = new java.util.Date(
                            ((java.sql.Timestamp) value).getTime());// wait to
                    // do：貌似有时区问题,
                    // 待进一步确认
                }
                getInstance().setSimpleProperty(bean, name, value);
            } catch (NoSuchMethodException e) {
                continue;
            }
        }
    }

    /**
     * Map内的key与Bean中属性相同的内容复制到BEAN中 对于存在空值的取默认值
     *
     * @param bean         Object
     * @param properties   Map
     * @param defaultValue String
     * @throws IllegalAccessException
     * @throws InvocationTargetException
     */
    public static void copyMap2Bean(Object bean, Map properties, String defaultValue) throws IllegalAccessException,
            InvocationTargetException {
        if ((bean == null) || (properties == null)) {
            return;
        }
        Iterator names = properties.keySet().iterator();
        while (names.hasNext()) {
            String name = (String) names.next();
            if (name == null) {
                continue;
            }
            Object value = properties.get(name);
            try {
                Class clazz = PropertyUtils.getPropertyType(bean, name);
                if (null == clazz) {
                    continue;
                }
                String className = clazz.getName();
                if (className.equalsIgnoreCase("java.sql.Timestamp")) {
                    if (value == null || value.equals("")) {
                        continue;
                    }
                }
                if (className.equalsIgnoreCase("java.lang.String")) {
                    if (value == null) {
                        value = defaultValue;
                    }
                }
                getInstance().setSimpleProperty(bean, name, value);
            } catch (NoSuchMethodException e) {
                continue;
            }
        }
    }

    /**
     * 对象属性深度拷贝（JACKSON转换）
     *
     * @param dest
     * @param source
     * @return
     * @throws Exception
     */
    @SuppressWarnings("unchecked")
    public static void copyDeepBean2Bean(Object dest, Object source) throws Exception {
        if (source == null) {
            return;
        }
        Map<String, Object> map = new LinkedMap();
        MyBeanUtils.copyBean2Map(map, source);
        MyBeanUtils.copyMap2Bean(dest, map);
    }

}

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