对象工具类，提供对象克隆、获取对象属性、类型判断、Map转换对象、对象转Map、设置对象属性等。
源码如下：(点击下载 - 
ObjectUtils.java 、JsonUtils.java 、gson-2.2.4.jar 、commons-lang-2.6.jar)
import java.io.Serializable;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Map;
import org.apache.commons.lang.SerializationUtils;
import org.apache.commons.lang.StringUtils; /**
* 对象工具类
*
*/
public class ObjectUtils { private static final Class<?>[] BASIC_NUMBER_CLASSES = new Class[] {
short.class, int.class, long.class, float.class, double.class }; /**
* 对象克隆
*
* @param t
* a T object.
* @param <T>
* a T object.
* @return a T object.
*/
@SuppressWarnings("unchecked")
public static final <T> T clone(T t) {
if (t == null) {
return null;
}
if (t instanceof Serializable) {
return (T) SerializationUtils.clone((Serializable) t);
}
T result = null;
if (t instanceof Cloneable) {
try {
result = (T) ObjectUtils.clone(t);
} catch (Throwable e) {
}
}
if (result == null) {
String json = JsonUtils.toJson(t);
result = (T) JsonUtils.fromJson(json, t.getClass());
}
return result;
} /**
* 访问对象成员属性值值
*
* @param obj
* @param field
* @return
* @throws YichaException
*/
@SuppressWarnings("rawtypes")
private static final Object getFieldValue(Object obj, String field) throws Exception {
Object result = null;
if (obj instanceof Map) {
return ((Map) obj).get(field);
} if (obj == null) {
return null;
} Method getterMethod = null;
try {
getterMethod = obj.getClass().getMethod("get" + StringUtils.capitalize(field));
} catch (Exception e) {
}
if (getterMethod == null) {
try {
getterMethod = obj.getClass().getMethod("is" + StringUtils.capitalize(field));
} catch (Exception e) {
}
}
if (getterMethod == null) {
Field privateField;
try {
privateField = obj.getClass().getDeclaredField(field);
privateField.setAccessible(true);
result = privateField.get(obj);
} catch (Exception e) {
throw new Exception("field[" + field + "] doesn't exist.");
}
} else {
try {
result = getterMethod.invoke(obj);
} catch (Exception e) {
}
}
return result;
} /**
* 获取对象属性值
*
* @param obj
* 被取值的对象
* @param clazz
* 返回值的类型
* @param path
* 格式:field1.field2.field3
* @param <T>
* a T object.
* @return a T object.
*/
@SuppressWarnings("unchecked")
public static final <T> T getValue(Object obj, Class<T> clazz, String path) {
Object o = getValue(obj, path);
return o == null ? null : (T) o;
} /**
* <p>
* getValue.
* </p>
*
* @param obj
* a {@link java.lang.Object} object.
* @param path
* a {@link java.lang.String} object.
* @return a {@link java.lang.Object} object.
*/
public static final Object getValue(Object obj, String path) {
if (obj == null || StringUtils.isBlank(path)) {
return null;
}
String[] arr = StringUtils.split(path, ".");
Object o = obj;
for (int i = 0, len = arr.length; i < len; i++) {
final String field = StringUtils.strip(arr[i]);
try {
o = getFieldValue(o, field);
} catch (Exception e) {
o = null;
}
}
return o;
} /**
* 判断是否是数字类型
*
* @param obj
* a {@link java.lang.Object} object.
* @return a boolean.
*/
public static final boolean isNumberType(Object obj) {
if (obj == null) {
throw new RuntimeException("object is null.");
}
if (obj instanceof Number) {
return true;
} else {
for (Class<?> clazz : BASIC_NUMBER_CLASSES) {
if (obj.getClass().equals(clazz)) {
return true;
}
}
}
return false;
} /**
* 判断对象是否为零
*
* @param obj
* a {@link java.lang.Object} object.
* @return a boolean.
*/
public static final boolean isZero(Object obj) {
if (!isNumberType(obj)) {
return false;
}
final String foo = String.valueOf(obj);
return StringUtils.equals(foo, "0") || StringUtils.equals(foo, "0.0");
} /**
* Map转换对象
*
* @param map
* a {@link java.util.Map} object.
* @param clazz
* a {@link java.lang.Class} object.
* @param <T>
* a T object.
* @return a T object.
*/
public static final <T> T fromMap(final Map<String, Object> map, Class<T> clazz) {
return JsonUtils.fromJson(JsonUtils.toJson(map), clazz);
} /**
* 对象转Map
*
* @param object
* a {@link java.lang.Object} object.
* @return a {@link java.util.Map} object.
*/
public static final Map<String, Object> toMap(final Object object) {
return JsonUtils.fromJson(JsonUtils.toJson(object));
} /**
* 设置对象属性
*
* @param object
* a {@link java.lang.Object} object.
* @param field
* a {@link java.lang.String} object.
* @param value
* a T object.
* @param paramType
* a {@link java.lang.Class} object.
* @param <T>
* a T object.
*/
@SuppressWarnings("rawtypes")
public static final <T> void setValue(final Object object, final String field, final T value, final Class paramType) {
try {
Method md = object.getClass().getMethod("set" + StringUtils.capitalize(field), paramType);
if (md != null) {
md.invoke(object, value);
}
} catch (Throwable e) {
throw new RuntimeException(e);
}
} /**
* 设置对象属性
*
* @param object
* a {@link java.lang.Object} object.
* @param field
* a {@link java.lang.String} object.
* @param value
* a T object.
* @param <T>
* a T object.
*/
public static final <T> void setValue(final Object object, final String field, final T value) {
try {
for (Method method : object.getClass().getMethods()) {
if (StringUtils.equals(method.getName(), "set" + StringUtils.capitalize(field))) {
method.invoke(object, value);
break;
}
}
} catch (Throwable e) {
throw new RuntimeException(e);
}
} }