Java 反射工具类封装

最新推荐文章于 2025-07-18 09:48:11 发布

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最新推荐文章于 2025-07-18 09:48:11 发布

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CC 4.0 BY-SA版权

文章标签： java

原文链接：http://www.cnblogs.com/ProMonkey/p/5765699.html

本文介绍了一个封装了常用反射方法的工具类ReflectUtil，包括通过类路径获取Class对象、获取实体属性列表及键值对等实用功能，并提供了详细的代码实现。

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封装了常用的反射相关方法

public class ReflectUtil {
	/**
	 * 通过类路径获取Class
	 * 
	 * @author LHY <br>
	 *         Description <br>
	 *         LastModified 2014-5-9 Content <br>
	 */
	public static Class<?> getClass(String packagePath) throws ClassNotFoundException {
		return Class.forName(packagePath);
	}

	/**
	 * 获取的Activity的Class
	 * 
	 * @author LHY <br>
	 *         Description packageRoot：模块跟路径<br>
	 *         activityPath：Activity完整路径或 模块下Activity路径 LastModified 2014-5-9
	 *         Content <br>
	 */
	public static Class<?> getModelClass(String packageRoot, String activityPath) throws ClassNotFoundException {
		if (activityPath.indexOf(".") == 0) {
			activityPath = packageRoot + activityPath;
		}
		return getClass(activityPath);
	}

	/**
	 * 
	 * @author LHY <br>
	 *         Description 模拟get方法<br>
	 *         LastModified 2013-12-9 Content <br>
	 *         *@param obj 操作的对象<br>
	 *         *@param att 操作的属性<br>
	 * @param <T>
	 */
	public static <T> T getter(Object obj, String att) {
		T t = null;
		Field field;
		try {
			field = obj.getClass().getDeclaredField(att);
			field.setAccessible(true);
			t = (T) field.get(obj);
		} catch (NoSuchFieldException e) {
			e.printStackTrace();
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		}
		return t;
	}

	/**
	 * 
	 * @author LHY <br>
	 *         Description 通过属性名，添加属性<br>
	 *         LastModified 2014-2-13 Content <br>
	 */
	public static void setter(Object root, String name, Object value) {

		Field field;
		try {
			field = root.getClass().getDeclaredField(name);
			field.setAccessible(true);
			field.set(root, value);
		} catch (NoSuchFieldException e) {
			e.printStackTrace();
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		}
	}

	/**
	 * 
	 * @author LHY <br>
	 *         Description 获取实体属性名称列表<br>
	 *         LastModified 2013-12-9 Content <br>
	 */
	public static List<String> getFieldList(Object object) {
		List<String> fieldHashList = new ArrayList<String>();
		Class<?> cls = object.getClass();
		Field[] fieldlist = cls.getDeclaredFields();
		for (int i = 0; i < fieldlist.length; i++) {
			Field fld = fieldlist[i];
			fieldHashList.add(fld.getName());
		}
		return fieldHashList;
	}

	/**
	 * 
	 * @author LHY <br>
	 *         Description 获取实体属性名称和类别键值对<br>
	 *         LastModified 2013-12-9 Content <br>
	 */
	public static HashMap<String, Class<?>> getFieldMap(Object object) {
		HashMap<String, Class<?>> fieldHashMap = new HashMap<String, Class<?>>();
		Class<?> cls = object.getClass();
		Field[] fieldlist = cls.getDeclaredFields();
		for (int i = 0; i < fieldlist.length; i++) {
			Field fld = fieldlist[i];
			fieldHashMap.put(fld.getName(), fld.getType());
		}
		return fieldHashMap;
	}

	/**
	 * 
	 * @author LHY <br>
	 *         Description 获取一个新的实例<br>
	 *         LastModified 2013-12-10 Content <br>
	 */
	public static Object getNewBean(Object object) {
		try {
			object = object.getClass().newInstance();
		} catch (InstantiationException e) {
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		}
		return object;

	}
}

转载于:https://www.cnblogs.com/ProMonkey/p/5765699.html