org.apache.commons commons-collections4</artifactId...(personList,null); CollectionUtils.collate 描述:将两个已排序的集合a和b合并为一个已排序的列表,以便保留元素的自然顺序 CollectionUtils.collate...CollectionUtils.isEmpty 描述:安全检查指定的集合是否为空 CollectionUtils.isEmpty(Collection coll) CollectionUtils.isNotEmpty(Collection coll) CollectionUtils.reverseArray 描述:反转给定数组的顺序。...CollectionUtils.reverseArray(Object[] array); CollectionUtils.subtract 描述:差集 CollectionUtils.subtract
package com.simple.test; import java.util.Date; import java.util.Iterator; import java.util.Map; import org.apache.commons.lang3....ArrayUtils; import org.apache.commons.lang3.ClassUtils; import org.apache.commons.lang3.RandomStringUtils...; import org.apache.commons.lang3.StringEscapeUtils; import org.apache.commons.lang3.StringUtils; import... org.apache.commons.lang3.SystemUtils; import org.apache.commons.lang3.math.NumberUtils; import org.apache.commons.lang3....time.DateFormatUtils; import org.apache.commons.lang3.time.DateUtils; import org.junit.Test; public
org.apache.commons.collections – CommonsCollections自定义的一组公用的接口和工具类 org.apache.commons.collections.bag...– 实现Bag接口的一组类 org.apache.commons.collections.bidimap – 实现BidiMap系列接口的一组类 org.apache.commons.collections.buffer...– 实现Buffer接口的一组类 org.apache.commons.collections.collection –实现java.util.Collection接口的一组类 org.apache.commons.collections.comparators...org.apache.commons.collections.iterators – 实现java.util.Iterator接口的一组类 org.apache.commons.collections.keyvalue...– 实现集合和键/值映射相关的一组类 org.apache.commons.collections.list – 实现java.util.List接口的一组类 org.apache.commons.collections.map
Apache的commons pool组件是我们实现对象池化技术的良好助手。...三、组件特点 org.apache.commons.pool包定义了一部分在创建一个新的对象池实现时十分有用的接口和基本类。...五、PoolableObjectFactory、ObjectPool及ObjectPoolFactory 在commons pool组件中,对象池化的工作被划分给了三类对象: PoolableObjectFactoryExample.java...PoolableObjectFactory是commons-pool中定义个一个接口,Pool组件中没有包含任何一种PoolableObjectFactory实现,需要根据情况自行创立。
import org.apache.commons.collections.Transformer; import org.apache.commons.collections.functors.ChainedTransformer...; import org.apache.commons.collections.functors.ConstantTransformer; import org.apache.commons.collections.functors.InvokerTransformer....*; import org.apache.commons.collections.functors.*; import org.apache.commons.collections.map.TransformedMap...; import javassist.*; import org.apache.commons.collections4.Transformer; import org.apache.commons.collections4...org.apache.commons.collections4.functors.InstantiateTransformer; import org.apache.commons.collections4
log 41 严重: StandardWrapper.Throwable 42 java.lang.NoClassDefFoundError: org/apache/commons/fileupload...Servlet threw load() exception 87 java.lang.ClassNotFoundException: org.apache.commons.fileupload.FileItemFactory...log 133 严重: StandardWrapper.Throwable 134 java.lang.NoClassDefFoundError: org/apache/commons/fileupload...exception for servlet taotao-manager-web 184 java.lang.ClassNotFoundException: org.apache.commons.fileupload.FileItemFactory...log 233 严重: StandardWrapper.Throwable 234 java.lang.NoClassDefFoundError: org/apache/commons/fileupload
项目中引用的明明是commons.collections-3.2.1.jar (3.2版的),但服务器启动后,调用CollectionUtils.isNotEmpty 方法时, 却总是报 NoSuchMethodError...: org.apache.commons.collections.CollectionUtils.isNotEmpty(Ljava/util/Collection;)Z 上面那个异常仅在引用低版本的...commons.collectionsjar包时才会发生.所以想定位运行时到底引用的是哪个jar包....方法如下: System.out.println(CollectionUtils.class.getProtectionDomain().getCodeSource().getLocation())
异常信息: The type org.apache.commons.lang.exception.NestableRuntimeException cannot be resolved. ...It is indirectly referenced from required .class files 原因:apache.commons.lang的jar包出现问题。...解决过程:导入commons-lang3-3.6.jar还是出现这个问题,换成commons-lang-2.5.jar,问题得到解决。
对Apache commons-collections工具包做了简单使用介绍。 CollectionUtil 1....使用指南 对集合判定‘空’的操作使用Apache的commons-collection的工具包。...1.1 声明引用 对Collection接口使用 import org.apache.commons.collections.CollectionUtils; 对Map接口使用 import org.apache.commons.collections.MapUtils...import java.util.HashSet; import java.util.List; import java.util.Map; import java.util.Set; import org.apache.commons.collections.CollectionUtils...; import org.apache.commons.collections.MapUtils; import org.junit.Assert; import org.junit.Test; /*
下面是文章的地址: http://www.cnblogs.com/hongten/archive/2012/11/08/java_null.html 下面看看org.apache.commons.lang.StringUtils...You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-...specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.apache.commons.lang...import java.util.Iterator; 22 import java.util.List; 23 import java.util.Locale; 24 25 import org.apache.commons.lang.text.StrBuilder...Foundation 106 * @author Apache Jakarta Turbine
public static final long MILLIS_PER_SECOND = 1000
Exception starting filter struts2 java.lang.NoClassDefFoundError: org/apache/commons/lang3/StringUtils...org.apache.catalina.core.ApplicationFilterConfig....ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:619) Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang3...deployDirectory 2、错误原因 通过这个“Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang3....StringUtils”,可知这个缺少commons-lang3-3.1.jar包 3、解决的方法 将“commons-lang3-3.1.jar”复制到文件夹lib文件夹 版权声明:本文博主原创文章
The Object Stack One very common use of org.apache.commons.digester3.Digester technology is to dynamically...Element Matching Patterns A primary feature of the org.apache.commons.digester3.Digester parser is that...Formally, a processing rule is a Java class that subclasses the org.apache.commons.digester3.Rule interface...property-value>joke App.java: package webj2eedev; import org.apache.commons.digester3...Commons Digester: https://commons.apache.org/proper/commons-digester/ ----
1、使用commons-net连接ftp报错,如下所示: 1 org.apache.commons.net.MalformedServerReplyException: Could not parse...__getReply(FTP.java:344) 4 at org.apache.commons.net.ftp.FTP....__getReply(FTP.java:300) 5 at org.apache.commons.net.ftp.FTP...._connectAction_(FTP.java:438) 6 at org.apache.commons.net.ftp.FTPClient....; 11 import org.apache.commons.net.ftp.FTPFile; 12 import org.apache.commons.net.ftp.FTPReply; 13
序 这里简单介绍下,如何使用apache commons以及guava的类库来计算集合的交差并集。...22.0 org.apache.commons... commons-collections4 4.1</version...//交集 Collection intersectionSet = CollectionUtils.intersection(set1, set2);...//并集 Collection unionSet = CollectionUtils.union(set1, set2);
1、字符串工具类 apache的commons-lang3的StringUtils: a、isBlank(CharSequence cs) 检查字符串是否为null、empty或空格字符,...的org.apache.commons.collections的CollectionUtils: a、CollectionUtils.isEmpty(null): true...b、CollectionUtils.isNotEmpty(null): false spring的org.springframework.util的CollectionUtils: a、CollectionUtils.isEmpty...(null): true 集合工具类掌握上面两个基本上能满足日常开发了,另外还有一些常用的API就不一一列出了 3、数组工具类 apache的commons-lang3的ArrayUtils...的commons-beans的BeanUtils: a、copyProperties(Object dest,Object org); 不过利用上面的属性拷贝,如果项目不考虑效率的话,可以利用这个类的方法
List districtsList = district.getDistricts(); if (org.apache.commons.collections.CollectionUtils.isNotEmpty...List districts3 = districts2.getDistricts(); if (org.apache.commons.collections.CollectionUtils.isNotEmpty...List list = MunicipalLevelMapper.selectMunicipalLevelList("北京市-东城区"); if(CollectionUtils.isEmpty...("11001", "北京市","东城区"); //错误实例 if (CollectionUtils.isNotEmpty(riderList)) {...(riderList); //借助外部元素记录交换元素位置 if (CollectionUtils.isNotEmpty(
方法时,除了导入的Jsoup.jar包外,还必须导入JsoupXpath.jar; 但是在这里还是提示报错了:Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang3...按照提示下载导入commons-lang3-3.9.jar;(或者下载一个JsoupXpath.jar高版本的jar包?...没有试过) (commons-lang3这个jar包,后面是版本号,最好使用3以上版本) ? ? 导入后发现正常运行了。
com.chujianyun.web.util; import com.chujianyun.web.annotation.Field2Map; import com.chujianyun.web.bean.Invoke; import org.apache.commons.collections.CollectionUtils...; import org.apache.commons.collections.MapUtils; import org.apache.commons.lang3.StringUtils; import...// 这里可以用缓存 List invokes = getInvokesUseCacheIfPossible(object.getClass()); if (CollectionUtils.isEmpty...com.chujianyun.web.util; import com.chujianyun.web.bean.Invoke; import com.chujianyun.web.bean.MyBean; import org.apache.commons.collections.CollectionUtils...; import org.junit.Assert; import org.junit.jupiter.api.Test; import java.beans.IntrospectionException
1. org.apache.commons.io.IOUtils closeQuietly ( ) toString ( ) copy ( ) toByteArray ( ) write ( ) toInputStream...( ) readLines ( ) copyLarge ( ) lineIterator ( ) readFully ( ) 2. org.apache.commons.io.FileUtils...toString ( ) consume ( ) toByteArray ( ) consumeQuietly ( ) getContentCharSet ( ) 5. org.apache.commons.lang3...format ( ) parse ( ) 11. org.apache.commons.codec.digest.DigestUtils md5Hex ( ) shaHex ( ) sha256Hex...( ) sha1Hex ( ) sha ( ) md5 ( ) sha512Hex ( ) sha1 ( ) 12. org.apache.commons.collections.CollectionUtils
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