Examples with UtilException cn.hutool.core.exceptions.UtilException used on opensource projects

Example 16 with UtilException

use of cn.hutool.core.exceptions.UtilException in project hutool by looly.

the class ReflectUtil method getFieldValue.

/**
 * 获取字段值
 *
 * @param obj   对象，static字段则此字段为null
 * @param field 字段
 * @return 字段值
 * @throws UtilException 包装IllegalAccessException异常
 */
public static Object getFieldValue(Object obj, Field field) throws UtilException {
    if (null == field) {
        return null;
    }
    if (obj instanceof Class) {
        // 静态字段获取时对象为null
        obj = null;
    }
    setAccessible(field);
    Object result;
    try {
        result = field.get(obj);
    } catch (IllegalAccessException e) {
        throw new UtilException(e, "IllegalAccess for {}.{}", field.getDeclaringClass(), field.getName());
    }
    return result;
}

Example 17 with UtilException

use of cn.hutool.core.exceptions.UtilException in project hutool by looly.

the class ReflectUtil method newInstance.

/**
 * 实例化对象
 *
 * @param <T>    对象类型
 * @param clazz  类
 * @param params 构造函数参数
 * @return 对象
 * @throws UtilException 包装各类异常
 */
public static <T> T newInstance(Class<T> clazz, Object... params) throws UtilException {
    if (ArrayUtil.isEmpty(params)) {
        final Constructor<T> constructor = getConstructor(clazz);
        try {
            return constructor.newInstance();
        } catch (Exception e) {
            throw new UtilException(e, "Instance class [{}] error!", clazz);
        }
    }
    final Class<?>[] paramTypes = ClassUtil.getClasses(params);
    final Constructor<T> constructor = getConstructor(clazz, paramTypes);
    if (null == constructor) {
        throw new UtilException("No Constructor matched for parameter types: [{}]", new Object[] { paramTypes });
    }
    try {
        return constructor.newInstance(params);
    } catch (Exception e) {
        throw new UtilException(e, "Instance class [{}] error!", clazz);
    }
}

Example 18 with UtilException

use of cn.hutool.core.exceptions.UtilException in project hutool by looly.

the class ReflectUtil method invoke.

/**
 * 执行对象中指定方法
 * 如果需要传递的参数为null,请使用NullWrapperBean来传递,不然会丢失类型信息
 *
 * @param <T>        返回对象类型
 * @param obj        方法所在对象
 * @param methodName 方法名
 * @param args       参数列表
 * @return 执行结果
 * @throws UtilException IllegalAccessException包装
 * @see NullWrapperBean
 * @since 3.1.2
 */
public static <T> T invoke(Object obj, String methodName, Object... args) throws UtilException {
    Assert.notNull(obj, "Object to get method must be not null!");
    Assert.notBlank(methodName, "Method name must be not blank!");
    final Method method = getMethodOfObj(obj, methodName, args);
    if (null == method) {
        throw new UtilException("No such method: [{}] from [{}]", methodName, obj.getClass());
    }
    return invoke(obj, method, args);
}

Example 19 with UtilException

use of cn.hutool.core.exceptions.UtilException in project hutool by looly.

the class ServletUtil method write.

/**
 * 返回数据给客户端
 *
 * @param response   响应对象{@link HttpServletResponse}
 * @param in         需要返回客户端的内容
 * @param bufferSize 缓存大小
 */
public static void write(HttpServletResponse response, InputStream in, int bufferSize) {
    ServletOutputStream out = null;
    try {
        out = response.getOutputStream();
        IoUtil.copy(in, out, bufferSize);
    } catch (IOException e) {
        throw new UtilException(e);
    } finally {
        IoUtil.close(out);
        IoUtil.close(in);
    }
}

Example 20 with UtilException

use of cn.hutool.core.exceptions.UtilException in project hutool by looly.

the class SpringUtil method unregisterBean.

/**
 * 注销bean
 * <p>
 * 将Spring中的bean注销，请谨慎使用
 *
 * @param beanName bean名称
 * @author shadow
 * @since 5.7.7
 */
public static void unregisterBean(String beanName) {
    final ConfigurableListableBeanFactory factory = getConfigurableBeanFactory();
    if (factory instanceof DefaultSingletonBeanRegistry) {
        DefaultSingletonBeanRegistry registry = (DefaultSingletonBeanRegistry) factory;
        registry.destroySingleton(beanName);
    } else {
        throw new UtilException("Can not unregister bean, the factory is not a DefaultSingletonBeanRegistry!");
    }
}