话不多说直接贴代码
/**
* 利用反射实现对象之间相同属性复制
*
* @param source
* 要复制的
* @param target
* 复制给
*/
public static void copyProperties(Object source, Class<?> fromClass, Object target, Class<?> targetClass)
throws Exception {
copyPropertiesExclude(source, fromClass, target, targetClass);
}
/**
* 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, Class<?> fromClass, Object to, Class<?> toClass) throws Exception {
Method[] fromMethods = fromClass.getDeclaredMethods();
Method[] toMethods = fromClass.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;
toMethodName = "set" + fromMethodName.substring(3);
toMethod = findMethodByName(toMethods, toMethodName);
if (toMethod == null)
continue;
// 通过对象返回获取该方法的值
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;
}
下面是测试：
public static void main(String[] args) throws Exception {
NewsType newsType = new NewsType();
newsType.setName("测试反射");
newsType.setCreatedByID(12138L);
newsType.setCreatedByName("ZJH");
newsType.setCreatedOn(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse("2018-11-05 12:12:59"));
newsType.setCode("12138");
NewsType type = new NewsType();
BeanUtil.copyProperties(newsType,NewsType.class,type,NewsType.class);
System.out.println(type.getCreatedByName()+" "+type.getCode()+" "+type.getName()+" "+type.getCreatedByID());
}
控制台输出为：ZJH 12138 测试反射 12138