关于反射应用

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package com.ailk.utils;import java.lang.reflect.Array;import java.lang.reflect.Constructor;import java.lang.reflect.Field;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;import java.util.HashMap;import java.util.Map;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import com.ailk.om.service.impl.FormatTemplateAttr;/** *  * @className: ReflectionUtil * @description: 反射工具类 * @author: xlj * @date: 2017年1月1日  */public class ReflectionUtil{    /**     *      * @title: setField     * @description: 设置某个成员遍历的值     * @param owner     * @param fieldName     * @param value     * @throws Exception     * @return: void     */private static Logger logger = LoggerFactory.getLogger(ReflectionUtil.class);    public static void setField(Object owner, String fieldName, Object value) throws Exception {        Class<?> ownerClass = owner.getClass();        Field field = ownerClass.getDeclaredField(fieldName);        field.setAccessible(true);        field.set(owner, value);    }        /**     *      * @title: setFieldAll     * @description: 可以设置父类的field的值     * @param owner     * @param fieldName     * @param value     * @throws Exception     * @return: void     */    public static void setFieldAll(Object owner, String fieldName, Object value) throws Exception {        Class<?> ownerClass = owner.getClass();        Field field = null;        for (Class<?> clazz = ownerClass; clazz != Object.class; clazz = clazz.getSuperclass()) {            try {                field = clazz.getDeclaredField(fieldName);                logger.info(field + " find : in " + clazz.getName());                break;            }            catch (Exception e) {                logger.info(fieldName + " not find in " + clazz.getName());            }        }        field.setAccessible(true);        field.set(owner, value);    }        /**     * 得到某个对象的公共属性     *      * @param owner     *            , fieldName     * @return 该属性对象     * @throws Exception     *      */    public static Object getField(Object owner, String fieldName) throws Exception {        Class<?> ownerClass = owner.getClass();                Field field = ownerClass.getField(fieldName);                Object property = field.get(owner);                return property;    }        /**     * 得到某类的静态公共属性     *      * @param className     *            类名     * @param fieldName     *            属性名     * @return 该属性对象     * @throws Exception     */    public static Object getStaticField(String className, String fieldName) throws Exception {        Class<?> ownerClass = Class.forName(className);                Field field = ownerClass.getField(fieldName);                Object property = field.get(ownerClass);                return property;    }        /**     * 执行某对象方法     *      * @param owner     *            对象     * @param methodName     *            方法名     * @param args     *            参数     * @return 方法返回值     * @throws Exception     */    public static Object invokeMethod(Object owner, String methodName, Object... args) throws Exception {                Class<?> ownerClass = owner.getClass();                Class<?>[] argsClass = new Class[args.length];        for (int i = 0, j = args.length; i < j; i++) {            if (args[i].getClass() == Integer.class) {                 argsClass[i] = int.class;            }             else if (args[i].getClass() == Float.class) {                 argsClass[i] = float.class;            }            else if (args[i].getClass() == Double.class) {                 argsClass[i] = double.class;            }             else if(args[i] instanceof Map){//不能用args[i].getClass();会找不到类的，只能用类的class或遍历getDeclareMethods,找到与方法名相同的                argsClass[i] = Map.class;            }        }                Method method = ownerClass.getDeclaredMethod(methodName, argsClass);        method.setAccessible(true);        return method.invoke(owner, args);    }        /**     *      * @title: invokeMethodAll     * @description: 调用所有的函数, 包括父类的所有函数     * @param owner     * @param methodName     * @param args     * @return     * @throws Exception     * @return: Object     */    public static Object invokeMethodAll(Object owner, String methodName, Object... args) throws Exception {                Class<?> ownerClass = owner.getClass();                Class<?>[] argsClass = new Class[args.length];                for (int i = 0, j = args.length; i < j; i++) {            if (args[i].getClass() == Integer.class) { //一般的函数都是 int 而不是Integer                argsClass[i] = int.class;            }            else if (args[i].getClass() == Float.class) { //一般的函数都是 int 而不是Integer                argsClass[i] = float.class;            }            else if (args[i].getClass() == Double.class) { //一般的函数都是 int 而不是Integer                argsClass[i] = double.class;            }            else {                argsClass[i] = args[i].getClass();            }        }        Method method = null;                for (Class<?> clazz = ownerClass; clazz != Object.class; clazz = clazz.getSuperclass()) {            try {                method = clazz.getDeclaredMethod(methodName, argsClass);                logger.info(method + " find : in " + clazz.getName());                return method;            }            catch (Exception e) {                //e.printStackTrace();                logger.info(methodName + " not find in " + clazz.getName());            }        }        method.setAccessible(true);        return method.invoke(owner, args);    }        /**     * 执行某类的静态方法     *      * @param className     *            类名     * @param methodName     *            方法名     * @param args     *            参数数组     * @return 执行方法返回的结果     * @throws Exception     */    public static Object invokeStaticMethod(String className, String methodName, Object... args) throws Exception {        Class<?> ownerClass = Class.forName(className);                Class<?>[] argsClass = new Class[args.length];                for (int i = 0, j = args.length; i < j; i++) {            argsClass[i] = args[i].getClass();        }                Method method = ownerClass.getMethod(methodName, argsClass);        method.setAccessible(true);        return method.invoke(null, args);    }        /**     * 新建实例     *      * @param className     *            类名     * @param args     *            构造函数的参数 如果无构造参数，args 填写为 null     * @return 新建的实例     * @throws Exception     */    public static Object newInstance(String className, Object[] args) throws NoSuchMethodException, SecurityException, ClassNotFoundException, InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {        return newInstance(className, args, null);            }        /**     * 新建实例     *      * @param className     *            类名     * @param args     *            构造函数的参数 如果无构造参数，args 填写为 null     * @return 新建的实例     * @throws Exception     */    public static Object newInstance(String className, Object[] args, Class<?>[] argsType) throws NoSuchMethodException, SecurityException, ClassNotFoundException, InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {        Class<?> newoneClass = Class.forName(className);        if (args == null) {Constructor constructors = newoneClass.getDeclaredConstructor(null);constructors.setAccessible(true);            return constructors.newInstance(null);                    }        else {            Constructor<?> cons;            if (argsType == null) {                Class<?>[] argsClass = new Class[args.length];                                for (int i = 0, j = args.length; i < j; i++) {                    argsClass[i] = args[i].getClass();                }                                cons = newoneClass.getConstructor(argsClass);            }            else {                cons = newoneClass.getConstructor(argsType);            }            return cons.newInstance(args);        }            }        /**     * 是不是某个类的实例     *      * @param obj     *            实例     * @param cls     *            类     * @return 如果 obj 是此类的实例，则返回 true     */    public static boolean isInstance(Object obj, Class<?> cls) {        return cls.isInstance(obj);    }        /**     * 得到数组中的某个元素     *      * @param array     *            数组     * @param index     *            索引     * @return 返回指定数组对象中索引组件的值     */    public static Object getItemInArray(Object array, int index) {        return Array.get(array, index);    }        /**     *      * @title: GetClassListByPackage     * @description: 获取包下的所有Class     * @param pPackage     * @return     * @return: Class<?>     */    public static Class<?> getClassListByPackage(String pPackage) {        Package _Package = Package.getPackage(pPackage);        Class<?> _List = _Package.getClass();                return _List;    }    /**     * 获取方法执行     */    public static Object invokeMethodByPrivate(String clazz, String method,  Object... args){    Object instance = null;    Object obj = null;try {instance = ReflectionUtil.newInstance(clazz, null);obj = ReflectionUtil.invokeMethod(instance, method, args);} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}return obj;    }}
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