反射工具类、流操作工具类、文件操作工具类

package hjp.smart4j.framework.util;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.lang.reflect.Field;
import java.lang.reflect.Method;

/**
 * 反射工具类
 */
public final class ReflectionUtil {
    private static final Logger LOGGER = LoggerFactory.getLogger(ReflectionUtil.class);

    /**
     * 创建实例
     */
    public static Object newInstance(Class<?> cls) {
        Object instance;
        try {
            instance = cls.newInstance();
        } catch (Exception e) {
            LOGGER.error("new instance failure", e);
            throw new RuntimeException(e);
        }
        return instance;
    }

    /**
     * 调用方法
     */
    public static Object invokeMethod(Object obj, Method method, Object... args) {
        Object result;
        try {
            method.setAccessible(true);//true 则指示反射的对象在使用时应该取消 Java 语言访问检查, false 则指示反射的对象应该实施 Java 语言访问检查
            result = method.invoke(obj, args);
        } catch (Exception e) {
            LOGGER.error("invoke method failure", e);
            throw new RuntimeException(e);
        }
        return result;
    }

    /**
     * 设置成员变量的值
     */
    public static void setField(Object obj, Field field, Object value) {
        try {
            field.setAccessible(true);
            field.set(obj, value);
        } catch (Exception e) {
            LOGGER.error("set field failure", e);
            throw new RuntimeException(e);
        }
    }
}

ReflectionUtil