Java -- 利用反射实现对象之间相同属性复制BeanUtil

package com.redhorse.util;

import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;

import com.redhorse.consts.Const;
import com.redhorse.entity.assets.base.CapitalDetailBeanBase;

/**
* 此工具类，用于老架构Bean 数据转换到 新架构(SOA)Bean <br>
* 如com.redhorse.bean.CapitalDetailBean 转换为
* com.redhorse.base.entity.BaseEntity.CapitalDetailBeanBase <br>
*
* @author GaoPeng
*
*/
public class BeanUtil {
/**
* 利用反射实现对象之间相同属性复制
*
* @param source
*            要复制的
* @param to
*            复制给
*/
public static void copyProperties(Object source, Object target) throws Exception {

copyPropertiesExclude(source, target, null);
}

/**
* 复制对象属性
*
* @param from
* @param to
* @param excludsArray
*            排除属性列表
* @throws Exception
*/
public static void copyPropertiesExclude(Object from, Object to, String[] excludsArray) throws Exception {

List<String> excludesList = null;

if (excludsArray != null && excludsArray.length > 0) {

excludesList = Arrays.asList(excludsArray); // 构造列表对象
}

Method[] fromMethods = from.getClass().getDeclaredMethods();
Method[] toMethods = to.getClass().getDeclaredMethods();
Method fromMethod = null, toMethod = null;
String fromMethodName = null, toMethodName = null;

for (int i = 0; i < fromMethods.length; i++) {

fromMethod = fromMethods[i];
fromMethodName = fromMethod.getName();

if (!fromMethodName.contains("get"))
continue;
// 排除列表检测
if (excludesList != null && excludesList.contains(fromMethodName.substring(3).toLowerCase())) {

continue;
}
toMethodName = "set" + fromMethodName.substring(3);
toMethod = findMethodByName(toMethods, toMethodName);

if (toMethod == null)
continue;
Object value = fromMethod.invoke(from, new Object[0]);

if (value == null)
continue;
// 集合类判空处理
if (value instanceof Collection) {

Collection<?> newValue = (Collection<?>) value;

if (newValue.size() <= 0)
continue;
}

toMethod.invoke(to, new Object[] { value });
}
}

/**
* 对象属性值复制，仅复制指定名称的属性值
*
* @param from
* @param to
* @param includsArray
* @throws Exception
*/
public static void copyPropertiesInclude(Object from, Object to, String[] includsArray) throws Exception {

List<String> includesList = null;

if (includsArray != null && includsArray.length > 0) {

includesList = Arrays.asList(includsArray);

} else {

return;
}
Method[] fromMethods = from.getClass().getDeclaredMethods();
Method[] toMethods = to.getClass().getDeclaredMethods();
Method fromMethod = null, toMethod = null;
String fromMethodName = null, toMethodName = null;

for (int i = 0; i < fromMethods.length; i++) {

fromMethod = fromMethods[i];
fromMethodName = fromMethod.getName();

if (!fromMethodName.contains("get"))
continue;

// 排除列表检测
String str = fromMethodName.substring(3);

if (!includesList.contains(str.substring(0, 1).toLowerCase() + str.substring(1))) {
continue;
}

toMethodName = "set" + fromMethodName.substring(3);
toMethod = findMethodByName(toMethods, toMethodName);

if (toMethod == null)
continue;

Object value = fromMethod.invoke(from, new Object[0]);

if (value == null)
continue;

// 集合类判空处理
if (value instanceof Collection) {

Collection<?> newValue = (Collection<?>) value;

if (newValue.size() <= 0)
continue;
}

toMethod.invoke(to, new Object[] { value });
}
}

/**
* 从方法数组中获取指定名称的方法
*
* @param methods
* @param name
* @return
*/
public static Method findMethodByName(Method[] methods, String name) {

for (int j = 0; j < methods.length; j++) {

if (methods[j].getName().equals(name)) {

return methods[j];
}

}
return null;
}

public static void main(String[] args) {

com.redhorse.bean.CapitalDetailBean c = new com.redhorse.bean.CapitalDetailBean();
c.setAmount(Long.parseLong("1000"));
c.setUserId(308850);
c.setCapitaDirection(1);
c.setType(Const.CAPITAL_DETAIL_TYPE_EXPECT_FEE_F);
c.setCurrency(1);
c.setFlag(1);
c.setRemarks("junit test");
c.setId(1);

CapitalDetailBeanBase c1 = new CapitalDetailBeanBase();

try {
copyPropertiesExclude(c, c1, null);

System.out.println(c1.toString());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}