From 3c4fee1db116c11d4f04727cfe076d7c94daeaf2 Mon Sep 17 00:00:00 2001
From: yanzhaofeige <yanzhaofeige@qq.com>
Date: Mon, 30 Sep 2024 12:10:57 +0800
Subject: [PATCH] init
---
cpzidc-common/src/main/java/com/odcc/cpzidc/common/utils/reflect/ReflectUtils.java | 410 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 410 insertions(+), 0 deletions(-)
diff --git a/cpzidc-common/src/main/java/com/odcc/cpzidc/common/utils/reflect/ReflectUtils.java b/cpzidc-common/src/main/java/com/odcc/cpzidc/common/utils/reflect/ReflectUtils.java
new file mode 100644
index 0000000..dd65759
--- /dev/null
+++ b/cpzidc-common/src/main/java/com/odcc/cpzidc/common/utils/reflect/ReflectUtils.java
@@ -0,0 +1,410 @@
+package com.odcc.cpzidc.common.utils.reflect;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.util.Date;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.lang3.Validate;
+import org.apache.poi.ss.usermodel.DateUtil;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import com.odcc.cpzidc.common.core.text.Convert;
+import com.odcc.cpzidc.common.utils.DateUtils;
+
+/**
+ * 反射工具类. 提供调用getter/setter方法, 访问私有变量, 调用私有方法, 获取泛型类型Class, 被AOP过的真实类等工具函数.
+ *
+ * @author ruoyi
+ */
+@SuppressWarnings("rawtypes")
+public class ReflectUtils
+{
+ private static final String SETTER_PREFIX = "set";
+
+ private static final String GETTER_PREFIX = "get";
+
+ private static final String CGLIB_CLASS_SEPARATOR = "$$";
+
+ private static Logger logger = LoggerFactory.getLogger(ReflectUtils.class);
+
+ /**
+ * 调用Getter方法.
+ * 支持多级，如：对象名.对象名.方法
+ */
+ @SuppressWarnings("unchecked")
+ public static <E> E invokeGetter(Object obj, String propertyName)
+ {
+ Object object = obj;
+ for (String name : StringUtils.split(propertyName, "."))
+ {
+ String getterMethodName = GETTER_PREFIX + StringUtils.capitalize(name);
+ object = invokeMethod(object, getterMethodName, new Class[] {}, new Object[] {});
+ }
+ return (E) object;
+ }
+
+ /**
+ * 调用Setter方法, 仅匹配方法名。
+ * 支持多级，如：对象名.对象名.方法
+ */
+ public static <E> void invokeSetter(Object obj, String propertyName, E value)
+ {
+ Object object = obj;
+ String[] names = StringUtils.split(propertyName, ".");
+ for (int i = 0; i < names.length; i++)
+ {
+ if (i < names.length - 1)
+ {
+ String getterMethodName = GETTER_PREFIX + StringUtils.capitalize(names[i]);
+ object = invokeMethod(object, getterMethodName, new Class[] {}, new Object[] {});
+ }
+ else
+ {
+ String setterMethodName = SETTER_PREFIX + StringUtils.capitalize(names[i]);
+ invokeMethodByName(object, setterMethodName, new Object[] { value });
+ }
+ }
+ }
+
+ /**
+ * 直接读取对象属性值, 无视private/protected修饰符, 不经过getter函数.
+ */
+ @SuppressWarnings("unchecked")
+ public static <E> E getFieldValue(final Object obj, final String fieldName)
+ {
+ Field field = getAccessibleField(obj, fieldName);
+ if (field == null)
+ {
+ logger.debug("在 [" + obj.getClass() + "] 中，没有找到 [" + fieldName + "] 字段 ");
+ return null;
+ }
+ E result = null;
+ try
+ {
+ result = (E) field.get(obj);
+ }
+ catch (IllegalAccessException e)
+ {
+ logger.error("不可能抛出的异常{}", e.getMessage());
+ }
+ return result;
+ }
+
+ /**
+ * 直接设置对象属性值, 无视private/protected修饰符, 不经过setter函数.
+ */
+ public static <E> void setFieldValue(final Object obj, final String fieldName, final E value)
+ {
+ Field field = getAccessibleField(obj, fieldName);
+ if (field == null)
+ {
+ // throw new IllegalArgumentException("在 [" + obj.getClass() + "] 中，没有找到 [" + fieldName + "] 字段 ");
+ logger.debug("在 [" + obj.getClass() + "] 中，没有找到 [" + fieldName + "] 字段 ");
+ return;
+ }
+ try
+ {
+ field.set(obj, value);
+ }
+ catch (IllegalAccessException e)
+ {
+ logger.error("不可能抛出的异常: {}", e.getMessage());
+ }
+ }
+
+ /**
+ * 直接调用对象方法, 无视private/protected修饰符.
+ * 用于一次性调用的情况，否则应使用getAccessibleMethod()函数获得Method后反复调用.
+ * 同时匹配方法名+参数类型，
+ */
+ @SuppressWarnings("unchecked")
+ public static <E> E invokeMethod(final Object obj, final String methodName, final Class<?>[] parameterTypes,
+ final Object[] args)
+ {
+ if (obj == null || methodName == null)
+ {
+ return null;
+ }
+ Method method = getAccessibleMethod(obj, methodName, parameterTypes);
+ if (method == null)
+ {
+ logger.debug("在 [" + obj.getClass() + "] 中，没有找到 [" + methodName + "] 方法 ");
+ return null;
+ }
+ try
+ {
+ return (E) method.invoke(obj, args);
+ }
+ catch (Exception e)
+ {
+ String msg = "method: " + method + ", obj: " + obj + ", args: " + args + "";
+ throw convertReflectionExceptionToUnchecked(msg, e);
+ }
+ }
+
+ /**
+ * 直接调用对象方法, 无视private/protected修饰符，
+ * 用于一次性调用的情况，否则应使用getAccessibleMethodByName()函数获得Method后反复调用.
+ * 只匹配函数名，如果有多个同名函数调用第一个。
+ */
+ @SuppressWarnings("unchecked")
+ public static <E> E invokeMethodByName(final Object obj, final String methodName, final Object[] args)
+ {
+ Method method = getAccessibleMethodByName(obj, methodName, args.length);
+ if (method == null)
+ {
+ // 如果为空不报错，直接返回空。
+ logger.debug("在 [" + obj.getClass() + "] 中，没有找到 [" + methodName + "] 方法 ");
+ return null;
+ }
+ try
+ {
+ // 类型转换（将参数数据类型转换为目标方法参数类型）
+ Class<?>[] cs = method.getParameterTypes();
+ for (int i = 0; i < cs.length; i++)
+ {
+ if (args[i] != null && !args[i].getClass().equals(cs[i]))
+ {
+ if (cs[i] == String.class)
+ {
+ args[i] = Convert.toStr(args[i]);
+ if (StringUtils.endsWith((String) args[i], ".0"))
+ {
+ args[i] = StringUtils.substringBefore((String) args[i], ".0");
+ }
+ }
+ else if (cs[i] == Integer.class)
+ {
+ args[i] = Convert.toInt(args[i]);
+ }
+ else if (cs[i] == Long.class)
+ {
+ args[i] = Convert.toLong(args[i]);
+ }
+ else if (cs[i] == Double.class)
+ {
+ args[i] = Convert.toDouble(args[i]);
+ }
+ else if (cs[i] == Float.class)
+ {
+ args[i] = Convert.toFloat(args[i]);
+ }
+ else if (cs[i] == Date.class)
+ {
+ if (args[i] instanceof String)
+ {
+ args[i] = DateUtils.parseDate(args[i]);
+ }
+ else
+ {
+ args[i] = DateUtil.getJavaDate((Double) args[i]);
+ }
+ }
+ else if (cs[i] == boolean.class || cs[i] == Boolean.class)
+ {
+ args[i] = Convert.toBool(args[i]);
+ }
+ }
+ }
+ return (E) method.invoke(obj, args);
+ }
+ catch (Exception e)
+ {
+ String msg = "method: " + method + ", obj: " + obj + ", args: " + args + "";
+ throw convertReflectionExceptionToUnchecked(msg, e);
+ }
+ }
+
+ /**
+ * 循环向上转型, 获取对象的DeclaredField, 并强制设置为可访问.
+ * 如向上转型到Object仍无法找到, 返回null.
+ */
+ public static Field getAccessibleField(final Object obj, final String fieldName)
+ {
+ // 为空不报错。直接返回 null
+ if (obj == null)
+ {
+ return null;
+ }
+ Validate.notBlank(fieldName, "fieldName can't be blank");
+ for (Class<?> superClass = obj.getClass(); superClass != Object.class; superClass = superClass.getSuperclass())
+ {
+ try
+ {
+ Field field = superClass.getDeclaredField(fieldName);
+ makeAccessible(field);
+ return field;
+ }
+ catch (NoSuchFieldException e)
+ {
+ continue;
+ }
+ }
+ return null;
+ }
+
+ /**
+ * 循环向上转型, 获取对象的DeclaredMethod,并强制设置为可访问.
+ * 如向上转型到Object仍无法找到, 返回null.
+ * 匹配函数名+参数类型。
+ * 用于方法需要被多次调用的情况. 先使用本函数先取得Method,然后调用Method.invoke(Object obj, Object... args)
+ */
+ public static Method getAccessibleMethod(final Object obj, final String methodName,
+ final Class<?>... parameterTypes)
+ {
+ // 为空不报错。直接返回 null
+ if (obj == null)
+ {
+ return null;
+ }
+ Validate.notBlank(methodName, "methodName can't be blank");
+ for (Class<?> searchType = obj.getClass(); searchType != Object.class; searchType = searchType.getSuperclass())
+ {
+ try
+ {
+ Method method = searchType.getDeclaredMethod(methodName, parameterTypes);
+ makeAccessible(method);
+ return method;
+ }
+ catch (NoSuchMethodException e)
+ {
+ continue;
+ }
+ }
+ return null;
+ }
+
+ /**
+ * 循环向上转型, 获取对象的DeclaredMethod,并强制设置为可访问.
+ * 如向上转型到Object仍无法找到, 返回null.
+ * 只匹配函数名。
+ * 用于方法需要被多次调用的情况. 先使用本函数先取得Method,然后调用Method.invoke(Object obj, Object... args)
+ */
+ public static Method getAccessibleMethodByName(final Object obj, final String methodName, int argsNum)
+ {
+ // 为空不报错。直接返回 null
+ if (obj == null)
+ {
+ return null;
+ }
+ Validate.notBlank(methodName, "methodName can't be blank");
+ for (Class<?> searchType = obj.getClass(); searchType != Object.class; searchType = searchType.getSuperclass())
+ {
+ Method[] methods = searchType.getDeclaredMethods();
+ for (Method method : methods)
+ {
+ if (method.getName().equals(methodName) && method.getParameterTypes().length == argsNum)
+ {
+ makeAccessible(method);
+ return method;
+ }
+ }
+ }
+ return null;
+ }
+
+ /**
+ * 改变private/protected的方法为public，尽量不调用实际改动的语句，避免JDK的SecurityManager抱怨。
+ */
+ public static void makeAccessible(Method method)
+ {
+ if ((!Modifier.isPublic(method.getModifiers()) || !Modifier.isPublic(method.getDeclaringClass().getModifiers()))
+ && !method.isAccessible())
+ {
+ method.setAccessible(true);
+ }
+ }
+
+ /**
+ * 改变private/protected的成员变量为public，尽量不调用实际改动的语句，避免JDK的SecurityManager抱怨。
+ */
+ public static void makeAccessible(Field field)
+ {
+ if ((!Modifier.isPublic(field.getModifiers()) || !Modifier.isPublic(field.getDeclaringClass().getModifiers())
+ || Modifier.isFinal(field.getModifiers())) && !field.isAccessible())
+ {
+ field.setAccessible(true);
+ }
+ }
+
+ /**
+ * 通过反射, 获得Class定义中声明的泛型参数的类型, 注意泛型必须定义在父类处
+ * 如无法找到, 返回Object.class.
+ */
+ @SuppressWarnings("unchecked")
+ public static <T> Class<T> getClassGenricType(final Class clazz)
+ {
+ return getClassGenricType(clazz, 0);
+ }
+
+ /**
+ * 通过反射, 获得Class定义中声明的父类的泛型参数的类型.
+ * 如无法找到, 返回Object.class.
+ */
+ public static Class getClassGenricType(final Class clazz, final int index)
+ {
+ Type genType = clazz.getGenericSuperclass();
+
+ if (!(genType instanceof ParameterizedType))
+ {
+ logger.debug(clazz.getSimpleName() + "'s superclass not ParameterizedType");
+ return Object.class;
+ }
+
+ Type[] params = ((ParameterizedType) genType).getActualTypeArguments();
+
+ if (index >= params.length || index < 0)
+ {
+ logger.debug("Index: " + index + ", Size of " + clazz.getSimpleName() + "'s Parameterized Type: "
+ + params.length);
+ return Object.class;
+ }
+ if (!(params[index] instanceof Class))
+ {
+ logger.debug(clazz.getSimpleName() + " not set the actual class on superclass generic parameter");
+ return Object.class;
+ }
+
+ return (Class) params[index];
+ }
+
+ public static Class<?> getUserClass(Object instance)
+ {
+ if (instance == null)
+ {
+ throw new RuntimeException("Instance must not be null");
+ }
+ Class clazz = instance.getClass();
+ if (clazz != null && clazz.getName().contains(CGLIB_CLASS_SEPARATOR))
+ {
+ Class<?> superClass = clazz.getSuperclass();
+ if (superClass != null && !Object.class.equals(superClass))
+ {
+ return superClass;
+ }
+ }
+ return clazz;
+
+ }
+
+ /**
+ * 将反射时的checked exception转换为unchecked exception.
+ */
+ public static RuntimeException convertReflectionExceptionToUnchecked(String msg, Exception e)
+ {
+ if (e instanceof IllegalAccessException || e instanceof IllegalArgumentException
+ || e instanceof NoSuchMethodException)
+ {
+ return new IllegalArgumentException(msg, e);
+ }
+ else if (e instanceof InvocationTargetException)
+ {
+ return new RuntimeException(msg, ((InvocationTargetException) e).getTargetException());
+ }
+ return new RuntimeException(msg, e);
+ }
+}
--
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