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常用工具类库

There is a newer version: 2.1.2-RELEASE

package com.hb0730.commons.lang;

/**
 * 类工具类
 *
 * @author bing_huang
 * @since 1.0.0
 */
public class ClassUtils {
    /**
     * 确定class是否可以被加载
     *
     * @param className   完整类名
     * @param classLoader 类加载
     * @return {boolean}
     */
    public static boolean isPresent(String className, ClassLoader classLoader) {
        try {
            Class.forName(className, true, classLoader);
            return true;
        } catch (Throwable ex) {
            return false;
        }
    }

    /**
     * 获取指定类型的默认值
     *
     * @param clazz class类
     * @return 默认值
     * @since 1.0.1
     */
    public static Object getDefaultValue(Class clazz) {
        if (null == clazz) {
            return null;
        }
        if (clazz.isPrimitive()) {
            if (byte.class == clazz) {
                return (byte) 0;
            }
            if (short.class == clazz) {
                return (short) 0;
            }
            if (int.class == clazz) {
                return 0;
            }
            if (long.class == clazz) {
                return 0L;
            }
            if (double.class == clazz) {
                return 0D;
            }
            if (float.class == clazz) {
                return 0f;
            }
            if (boolean.class == clazz) {
                return false;
            }
            if (char.class == clazz) {
                return (char) 0;
            }
        }
        return null;
    }

    /**
     * 判断该类型是不是包装类型,包含String
     *
     * @param clazz 类
     * @return 是否为包装类型
     * @since 1.0.1
     */
    public static boolean isBasicClass(Class clazz) {
        boolean isPrimitive = false;
        try {
            if (clazz.isPrimitive() || clazz.isAssignableFrom(String.class)) {
                return true;
            } else {
                isPrimitive = ((Class) clazz.getField("TYPE").get(null)).isPrimitive();
            }
        } catch (Exception e) {
            isPrimitive = false;
        }
        return isPrimitive;
    }
}