org.tio.utils.hutool.ClassUtil Maven / Gradle / Ivy
The newest version!
/*
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction, and
distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by the copyright
owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all other entities
that control, are controlled by, or are under common control with that entity.
For the purposes of this definition, "control" means (i) the power, direct or
indirect, to cause the direction or management of such entity, whether by
contract or otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity exercising
permissions granted by this License.
"Source" form shall mean the preferred form for making modifications, including
but not limited to software source code, documentation source, and configuration
files.
"Object" form shall mean any form resulting from mechanical transformation or
translation of a Source form, including but not limited to compiled object code,
generated documentation, and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or Object form, made
available under the License, as indicated by a copyright notice that is included
in or attached to the work (an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object form, that
is based on (or derived from) the Work and for which the editorial revisions,
annotations, elaborations, or other modifications represent, as a whole, an
original work of authorship. For the purposes of this License, Derivative Works
shall not include works that remain separable from, or merely link (or bind by
name) to the interfaces of, the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including the original version
of the Work and any modifications or additions to that Work or Derivative Works
thereof, that is intentionally submitted to Licensor for inclusion in the Work
by the copyright owner or by an individual or Legal Entity authorized to submit
on behalf of the copyright owner. For the purposes of this definition,
"submitted" means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems, and
issue tracking systems that are managed by, or on behalf of, the Licensor for
the purpose of discussing and improving the Work, but excluding communication
that is conspicuously marked or otherwise designated in writing by the copyright
owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity on behalf
of whom a Contribution has been received by Licensor and subsequently
incorporated within the Work.
2. Grant of Copyright License.
Subject to the terms and conditions of this License, each Contributor hereby
grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free,
irrevocable copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the Work and such
Derivative Works in Source or Object form.
3. Grant of Patent License.
Subject to the terms and conditions of this License, each Contributor hereby
grants to You a perpetual, worldwide, non-exclusive, no-charge, royalty-free,
irrevocable (except as stated in this section) patent license to make, have
made, use, offer to sell, sell, import, and otherwise transfer the Work, where
such license applies only to those patent claims licensable by such Contributor
that are necessarily infringed by their Contribution(s) alone or by combination
of their Contribution(s) with the Work to which such Contribution(s) was
submitted. If You institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work or a
Contribution incorporated within the Work constitutes direct or contributory
patent infringement, then any patent licenses granted to You under this License
for that Work shall terminate as of the date such litigation is filed.
4. Redistribution.
You may reproduce and distribute copies of the Work or Derivative Works thereof
in any medium, with or without modifications, and in Source or Object form,
provided that You meet the following conditions:
You must give any other recipients of the Work or Derivative Works a copy of
this License; and
You must cause any modified files to carry prominent notices stating that You
changed the files; and
You must retain, in the Source form of any Derivative Works that You distribute,
all copyright, patent, trademark, and attribution notices from the Source form
of the Work, excluding those notices that do not pertain to any part of the
Derivative Works; and
If the Work includes a "NOTICE" text file as part of its distribution, then any
Derivative Works that You distribute must include a readable copy of the
attribution notices contained within such NOTICE file, excluding those notices
that do not pertain to any part of the Derivative Works, in at least one of the
following places: within a NOTICE text file distributed as part of the
Derivative Works; within the Source form or documentation, if provided along
with the Derivative Works; or, within a display generated by the Derivative
Works, if and wherever such third-party notices normally appear. The contents of
the NOTICE file are for informational purposes only and do not modify the
License. You may add Your own attribution notices within Derivative Works that
You distribute, alongside or as an addendum to the NOTICE text from the Work,
provided that such additional attribution notices cannot be construed as
modifying the License.
You may add Your own copyright statement to Your modifications and may provide
additional or different license terms and conditions for use, reproduction, or
distribution of Your modifications, or for any such Derivative Works as a whole,
provided Your use, reproduction, and distribution of the Work otherwise complies
with the conditions stated in this License.
5. Submission of Contributions.
Unless You explicitly state otherwise, any Contribution intentionally submitted
for inclusion in the Work by You to the Licensor shall be under the terms and
conditions of this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify the terms of
any separate license agreement you may have executed with Licensor regarding
such Contributions.
6. Trademarks.
This License does not grant permission to use the trade names, trademarks,
service marks, or product names of the Licensor, except as required for
reasonable and customary use in describing the origin of the Work and
reproducing the content of the NOTICE file.
7. Disclaimer of Warranty.
Unless required by applicable law or agreed to in writing, Licensor provides the
Work (and each Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied,
including, without limitation, any warranties or conditions of TITLE,
NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You are
solely responsible for determining the appropriateness of using or
redistributing the Work and assume any risks associated with Your exercise of
permissions under this License.
8. Limitation of Liability.
In no event and under no legal theory, whether in tort (including negligence),
contract, or otherwise, unless required by applicable law (such as deliberate
and grossly negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special, incidental,
or consequential damages of any character arising as a result of this License or
out of the use or inability to use the Work (including but not limited to
damages for loss of goodwill, work stoppage, computer failure or malfunction, or
any and all other commercial damages or losses), even if such Contributor has
been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability.
While redistributing the Work or Derivative Works thereof, You may choose to
offer, and charge a fee for, acceptance of support, warranty, indemnity, or
other liability obligations and/or rights consistent with this License. However,
in accepting such obligations, You may act only on Your own behalf and on Your
sole responsibility, not on behalf of any other Contributor, and only if You
agree to indemnify, defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason of your
accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work
To apply the Apache License to your work, attach the following boilerplate
notice, with the fields enclosed by brackets "{}" replaced with your own
identifying information. (Don't include the brackets!) The text should be
enclosed in the appropriate comment syntax for the file format. We also
recommend that a file or class name and description of purpose be included on
the same "printed page" as the copyright notice for easier identification within
third-party archives.
Copyright 2020 t-io
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package org.tio.utils.hutool;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.net.JarURLConnection;
import java.net.URI;
import java.net.URL;
import java.net.URLDecoder;
import java.util.Date;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Locale;
import java.util.Set;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @author tanyaowu
* 2018年8月5日 下午6:34:56
*/
public class ClassUtil {
private static Logger log = LoggerFactory.getLogger(ClassUtil.class);
/**
* {@code null}安全的获取对象类型
*
* @param 对象类型
* @param obj 对象，如果为{@code null} 返回{@code null}
* @return 对象类型，提供对象如果为{@code null} 返回{@code null}
*/
@SuppressWarnings("unchecked")
public static Class getClass(T obj) {
return ((null == obj) ? null : (Class) obj.getClass());
}
/**
* 获取类名
*
* @param obj 获取类名对象
* @param isSimple 是否简单类名，如果为true，返回不带包名的类名
* @return 类名
* @since 3.0.7
*/
public static String getClassName(Object obj, boolean isSimple) {
if (null == obj) {
return null;
}
final Class clazz = obj.getClass();
return getClassName(clazz, isSimple);
}
/**
* 获取类名
* 类名并不包含“.class”这个扩展名
* 例如：ClassUtil这个类
*
*
* isSimple为false: "com.xiaoleilu.hutool.util.ClassUtil"
* isSimple为true: "ClassUtil"
*
*
* @param clazz 类
* @param isSimple 是否简单类名，如果为true，返回不带包名的类名
* @return 类名
* @since 3.0.7
*/
public static String getClassName(Class clazz, boolean isSimple) {
if (null == clazz) {
return null;
}
return isSimple ? clazz.getSimpleName() : clazz.getName();
}
/**
* 获得对象数组的类数组
*
* @param objects 对象数组，如果数组中存在{@code null}元素，则此元素被认为是Object类型
* @return 类数组
*/
public static Class[] getClasses(Object... objects) {
Class[] classes = new Class[objects.length];
Object obj;
for (int i = 0; i < objects.length; i++) {
obj = objects[i];
classes[i] = (null == obj) ? Object.class : obj.getClass();
}
return classes;
}
/**
* 指定类是否与给定的类名相同
*
* @param clazz 类
* @param className 类名，可以是全类名（包含包名），也可以是简单类名（不包含包名）
* @param ignoreCase 是否忽略大小写
* @return 指定类是否与给定的类名相同
* @since 3.0.7
*/
public static boolean equals(Class clazz, String className, boolean ignoreCase) {
if (null == clazz || StrUtil.isBlank(className)) {
return false;
}
if (ignoreCase) {
return className.equalsIgnoreCase(clazz.getName()) || className.equalsIgnoreCase(clazz.getSimpleName());
} else {
return className.equals(clazz.getName()) || className.equals(clazz.getSimpleName());
}
}
// ----------------------------------------------------------------------------------------- Method
/**
* 获得指定类中的Public方法名
* 去重重载的方法
*
* @param clazz 类
* @return 方法名Set
*/
public static Set getPublicMethodNames(Class clazz) {
HashSet methodSet = new HashSet();
Method[] methodArray = getPublicMethods(clazz);
for (Method method : methodArray) {
String methodName = method.getName();
methodSet.add(methodName);
}
return methodSet;
}
/**
* 获得本类及其父类所有Public方法
*
* @param clazz 查找方法的类
* @return 过滤后的方法列表
*/
public static Method[] getPublicMethods(Class clazz) {
return clazz.getMethods();
}
/**
* 查找指定Public方法 如果找不到对应的方法或方法不为public的则返回null
*
* @param clazz 类
* @param methodName 方法名
* @param paramTypes 参数类型
* @return 方法
* @throws SecurityException 无权访问抛出异常
*/
public static Method getPublicMethod(Class clazz, String methodName, Class... paramTypes) throws SecurityException {
try {
return clazz.getMethod(methodName, paramTypes);
} catch (NoSuchMethodException ex) {
return null;
}
}
// ----------------------------------------------------------------------------------------- Field
/**
* 查找指定类中的所有字段（包括非public字段）， 字段不存在则返回null
*
* @param clazz 被查找字段的类
* @param fieldName 字段名
* @return 字段
* @throws SecurityException 安全异常
*/
public static Field getDeclaredField(Class clazz, String fieldName) throws SecurityException {
if (null == clazz || StrUtil.isBlank(fieldName)) {
return null;
}
try {
return clazz.getDeclaredField(fieldName);
} catch (NoSuchFieldException e) {
// e.printStackTrace();
}
return null;
}
/**
* 查找指定类中的所有字段（包括非public字段)
*
* @param clazz 被查找字段的类
* @return 字段
* @throws SecurityException 安全异常
*/
public static Field[] getDeclaredFields(Class clazz) throws SecurityException {
if (null == clazz) {
return null;
}
return clazz.getDeclaredFields();
}
/**
* 指定类是否为Public
*
* @param clazz 类
* @return 是否为public
*/
public static boolean isPublic(Class clazz) {
if (null == clazz) {
throw new NullPointerException("Class to provided is null.");
}
return Modifier.isPublic(clazz.getModifiers());
}
/**
* 指定方法是否为Public
*
* @param method 方法
* @return 是否为public
*/
public static boolean isPublic(Method method) {
if (null == method) {
throw new NullPointerException("Method to provided is null.");
}
return isPublic(method.getDeclaringClass());
}
/**
* 指定类是否为非public
*
* @param clazz 类
* @return 是否为非public
*/
public static boolean isNotPublic(Class clazz) {
return false == isPublic(clazz);
}
/**
* 指定方法是否为非public
*
* @param method 方法
* @return 是否为非public
*/
public static boolean isNotPublic(Method method) {
return false == isPublic(method);
}
/**
* 是否为静态方法
*
* @param method 方法
* @return 是否为静态方法
*/
public static boolean isStatic(Method method) {
return Modifier.isStatic(method.getModifiers());
}
/**
* 设置方法为可访问
*
* @param method 方法
* @return 方法
*/
public static Method setAccessible(Method method) {
if (null != method && false == method.isAccessible()) {
method.setAccessible(true);
}
return method;
}
/**
* 是否为抽象类
*
* @param clazz 类
* @return 是否为抽象类
*/
public static boolean isAbstract(Class clazz) {
return Modifier.isAbstract(clazz.getModifiers());
}
/**
* 是否为标准的类
* 这个类必须：
*
* 1、非接口
* 2、非抽象类
* 3、非Enum枚举
* 4、非数组
* 5、非注解
* 6、非原始类型（int, long等）
*
*
* @param clazz 类
* @return 是否为标准类
*/
public static boolean isNormalClass(Class clazz) {
return null != clazz //
&& false == clazz.isInterface() //
&& false == isAbstract(clazz) //
&& false == clazz.isEnum() //
&& false == clazz.isArray() //
&& false == clazz.isAnnotation() //
&& false == clazz.isSynthetic() //
&& false == clazz.isPrimitive();//
}
/**
* 判断类是否为枚举类型
* @param clazz 类
* @return 是否为枚举类型
* @since 3.2.0
*/
public static boolean isEnum(Class clazz) {
return null == clazz ? false : clazz.isEnum();
}
/**
* 获取指定类型分的默认值
* 默认值规则为：
*
* 1、如果为原始类型，返回0
* 2、非原始类型返回{@code null}
*
*
* @param clazz 类
* @return 默认值
* @since 3.0.8
*/
public static Object getDefaultValue(Class clazz) {
if (clazz.isPrimitive()) {
if (long.class == clazz) {
return 0L;
} else if (int.class == clazz) {
return 0;
} else if (short.class == clazz) {
return (short) 0;
} else if (char.class == clazz) {
return (char) 0;
} else if (byte.class == clazz) {
return (byte) 0;
} else if (double.class == clazz) {
return 0D;
} else if (float.class == clazz) {
return 0f;
} else if (boolean.class == clazz) {
return false;
}
}
return null;
}
/**
* 获得默认值列表
* @param classes 值类型
* @return 默认值列表
* @since 3.0.9
*/
public static Object[] getDefaultValues(Class... classes) {
final Object[] values = new Object[classes.length];
for (int i = 0; i < classes.length; i++) {
values[i] = getDefaultValue(classes[i]);
}
return values;
}
/**
* 扫描包路径下所有的class文件
* 代码摘自网上（https://gitee.com/liuyueyi/quicksilver/blob/master/silver-file/src/main/java/com.hust.hui.quicksilver.file/PkgUtil.java），但作了不少改造
* @param pkg 形如：org.tio.core
* @param classScanHandler
* @return
* @throws ClassNotFoundException
* @throws IOException
*/
public static void scanPackage(String pkg, ClassScanHandler classScanHandler) throws ClassNotFoundException, IOException {
String pkgDirName = pkg.replace('.', '/');
Enumeration urls = ClassUtil.class.getClassLoader().getResources(pkgDirName);
while (urls.hasMoreElements()) {
URL url = urls.nextElement();
String protocol = url.getProtocol();
if ("file".equals(protocol)) {
String filePath = URLDecoder.decode(url.getFile(), "UTF-8");
findClassesByFile(pkg, filePath, classScanHandler);
} else if ("jar".equals(protocol)) {
JarFile jar = ((JarURLConnection) url.openConnection()).getJarFile();
findClassesByJar(pkg, jar, classScanHandler);
}
}
}
/**
* 扫描包路径下的所有class文件
*
* @param pkg 包名
* @param pkgDir 包对应的绝对地址
* @throws ClassNotFoundException
*/
private static void findClassesByFile(String pkg, String pkgDir, ClassScanHandler classScanHandler) throws ClassNotFoundException {
File dir = new File(pkgDir);
if (!dir.exists() || !dir.isDirectory()) {
return;
}
File[] dirfiles = dir.listFiles(pathname -> pathname.isDirectory() || pathname.getName().endsWith("class"));
if (dirfiles == null || dirfiles.length == 0) {
return;
}
for (File f : dirfiles) {
if (f.isDirectory()) {
findClassesByFile(pkg + "." + f.getName(), pkgDir + "/" + f.getName(), classScanHandler);
continue;
}
// 获取类名，干掉 ".class" 后缀
String className = f.getName();
className = className.substring(0, className.length() - 6);
Class clazz = loadClass(pkg + "." + className);
if (clazz != null) {
if (classScanHandler != null) {
try {
classScanHandler.handler(clazz);
} catch (Exception e) {
log.error(clazz.getName(), e);
}
}
}
}
}
/**
* 扫描包路径下的所有class文件
*
* @param pkgName 包名
* @param jar jar文件
* @throws ClassNotFoundException
*/
private static void findClassesByJar(String pkgName, JarFile jar, ClassScanHandler classScanHandler) throws ClassNotFoundException {
String pkgDir = pkgName.replace(".", "/");
Enumeration entry = jar.entries();
JarEntry jarEntry;
String name, className;
while (entry.hasMoreElements()) {
jarEntry = entry.nextElement();
name = jarEntry.getName();
if (name.charAt(0) == '/') {
name = name.substring(1);
}
if (jarEntry.isDirectory() || !name.startsWith(pkgDir) || !name.endsWith(".class")) {
// 非指定包路径， 非class文件
continue;
}
// 去掉后面的".class", 将路径转为package格式
className = name.substring(0, name.length() - 6);
Class clazz = loadClass(className.replace("/", "."));
if (clazz != null) {
if (classScanHandler != null) {
classScanHandler.handler(clazz);
}
}
}
}
private static Class loadClass(String fullClzName) throws ClassNotFoundException {
return Thread.currentThread().getContextClassLoader().loadClass(fullClzName);
}
/**
* 是否为包装类型
*
* @param clazz 类
* @return 是否为包装类型
*/
public static boolean isPrimitiveWrapper(Class clazz) {
if (null == clazz) {
return false;
}
return BasicType.wrapperPrimitiveMap.containsKey(clazz);
}
/**
* 是否为基本类型（包括包装类和原始类）
*
* @param clazz 类
* @return 是否为基本类型
*/
public static boolean isBasicType(Class clazz) {
if (null == clazz) {
return false;
}
return (clazz.isPrimitive() || isPrimitiveWrapper(clazz));
}
/**
* 是否简单值类型或简单值类型的数组
* 包括：原始类型,、String、other CharSequence, a Number, a Date, a URI, a URL, a Locale or a Class及其数组
*
* @param clazz 属性类
* @return 是否简单值类型或简单值类型的数组
*/
public static boolean isSimpleTypeOrArray(Class clazz) {
if (null == clazz) {
return false;
}
return isSimpleValueType(clazz) || (clazz.isArray() && isSimpleValueType(clazz.getComponentType()));
}
/**
* 是否为简单值类型
* 包括：原始类型,、String、other CharSequence, a Number, a Date, a URI, a URL, a Locale or a Class.
*
* @param clazz 类
* @return 是否为简单值类型
*/
public static boolean isSimpleValueType(Class clazz) {
return isBasicType(clazz) || clazz.isEnum() || CharSequence.class.isAssignableFrom(clazz) || Number.class.isAssignableFrom(clazz) || Date.class.isAssignableFrom(clazz)
|| clazz.equals(URI.class) || clazz.equals(URL.class) || clazz.equals(Locale.class) || clazz.equals(Class.class);
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy