Java tutorial
/* * Copyright 2013-2016 the original author or authors. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package efx.util.converter; import java.math.BigDecimal; import org.apache.commons.lang3.StringUtils; /** * BigDecimalString? * @author * */ public class BigDecimalStringConverter extends BaseConverter { @Override protected Object cast(Object obj) { if (obj == null) { //?null,??????? return null; } if (obj instanceof BigDecimal) { return obj.toString(); } else if (obj instanceof String) { String strValue = String.valueOf(obj); if (StringUtils.isNotEmpty(strValue)) { return new BigDecimal(strValue); } } return super.cast(obj); } }