| | |
| | | package com.ruoyi.common.utils.reflect;
|
| | |
|
| | | import cn.hutool.core.convert.Convert;
|
| | | import com.ruoyi.common.utils.DateUtils;
|
| | | 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 cn.hutool.core.util.ReflectUtil; |
| | | import cn.hutool.core.util.StrUtil; |
| | |
|
| | | import java.lang.reflect.*;
|
| | | import java.util.Date;
|
| | | import java.lang.reflect.Method; |
| | |
|
| | | /**
|
| | | * 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
|
| | | * @author Lion Li |
| | | */
|
| | | @SuppressWarnings("rawtypes")
|
| | | public class ReflectUtils
|
| | | {
|
| | | public class ReflectUtils extends ReflectUtil { |
| | | |
| | | private static final String SETTER_PREFIX = "set";
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| | |
|
| | | private static final String GETTER_PREFIX = "get";
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| | |
|
| | | private static final String CGLIB_CLASS_SEPARATOR = "$$";
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| | |
|
| | | 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")
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| | | public static <E> E invokeGetter(Object obj, String propertyName)
|
| | | {
|
| | | 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[] {});
|
| | | for (String name : StrUtil.split(propertyName, ".")) { |
| | | String getterMethodName = GETTER_PREFIX + StrUtil.upperFirst(name); |
| | | object = invoke(object, getterMethodName); |
| | | }
|
| | | 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)
|
| | | {
|
| | | 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 });
|
| | | String[] names = StrUtil.split(propertyName, "."); |
| | | for (int i = 0; i < names.length; i++) { |
| | | if (i < names.length - 1) { |
| | | String getterMethodName = GETTER_PREFIX + StrUtil.upperFirst(names[i]); |
| | | object = invoke(object, getterMethodName); |
| | | } else { |
| | | String setterMethodName = SETTER_PREFIX + StrUtil.upperFirst(names[i]); |
| | | Method method = getMethodByName(object.getClass(), setterMethodName); |
| | | invoke(object, method, 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);
|
| | | }
|
| | | }
|