具有相同屬性名稱的對象之間的屬性值複製，具體代碼如下
public class BeanUtil {
/**
* 利用反射實現對象之間相同屬性複製
*
* @param source 要複製的
* @param target 複製給
*/
public static void copyProperties(Object source, Object target) throws Exception {
copyPropertiesExclude(source, target, null);
}
/**
* 複製對象屬性
*
* @param from
* @param to
* @param excludsArray
* 排除屬性列表
* @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); // 構造列表對象
}
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;
// 排除列表檢測
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;
// 集合類判空處理
if (value instanceof Collection) {
Collection<?> newValue = (Collection<?>) value;
if (newValue.size() <= 0)
continue;
}
toMethod.invoke(to, new Object[] { value });
}
}
/**
* 對象屬性值複製，僅複製指定名稱的屬性值
*
* @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;
// 排除列表檢測
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;
// 集合類判空處理
if (value instanceof Collection) {
Collection<?> newValue = (Collection<?>) value;
if (newValue.size() <= 0)
continue;
}
toMethod.invoke(to, new Object[] { value });
}
}
/**
* 從方法數組中獲取指定名稱的方法
*
* @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;
}
}
