Java tutorial
/******************************************************************************* * Copyright 2015 MobileMan GmbH * www.mobileman.com * * 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 com.mobileman.projecth.web.util; import java.math.BigDecimal; import org.apache.commons.lang.StringUtils; public class NumUtils { public static Long convert2long(String str) { try { if (StringUtils.isNotBlank(str)) { return Long.parseLong(str); } } catch (Exception ex) { } return null; } public static Double convert2double(String str) { try { if (StringUtils.isNotBlank(str)) { return Double.parseDouble(str.replace(',', '.')); } } catch (Exception ex) { } return null; } public static BigDecimal convert2decimal(String str) { try { if (StringUtils.isNotBlank(str)) { return new BigDecimal(str); } } catch (Exception ex) { } return null; } public static Integer convert2int(String str) { try { if (StringUtils.isNotBlank(str)) { return Integer.parseInt(str); } } catch (Exception ex) { } return null; } }