異常在線程「主要」 java.lang.NoClassDefFoundError：組織/阿帕奇/公/ CSV/CSVFormat

我使用的gradle log4j2項目...並同時創造csvlayout我收到以下錯誤：在線程 異常「主要」 java.lang.NoClassDefFoundError：組織/阿帕奇/公/ CSV/CSVFormat異常在線程「主要」 java.lang.NoClassDefFoundError：組織/阿帕奇/公/ CSV/CSVFormat

CsvParameterLayoutExample類

package log4j_tutorial; 
import org.apache.logging.log4j.LogManager; 

import org.apache.logging.log4j.Logger; 

public class CsvParameterLayoutExample { 

private static final Logger logger = LogManager.getLogger(); 

public static void main(String[] args) { 
    int val1 = 10, val2 = 11, val3 = 12; 
    logger.trace("Trace Message!", val1, val2, val3); 
    logger.debug("Debug Message!", val1, val2, val3); 
    logger.info("Info Message!", val1, val2, val3); 
    logger.warn("Warn Message!", val1, val2, val3); 
    logger.error("Error Message!", val1, val2, val3); 
    logger.fatal("Fatal Message!", val1, val2, val3); 
}

}

log4j2.xml

<?xml version="1.0" encoding="UTF-8"?> 
<Configuration status="warn" xmlns="http://logging.apache.org/log4j/2.0/config" packages="log4j_tutorial"> 
<Appenders> 
<File name="my_file_appender" fileName="C:/Users/bishal.gupta/Desktop/Testing/CsvLog4jTest/application.log"> 
<CsvParameterLayout delimiter=","/> 
</File> 
</Appenders> 

<Loggers> 
    <Root level="info"> 
     <AppenderRef ref="my_file_appender" /> 
    </Root> 
</Loggers> 
</Configuration>

的build.gradle 依賴關係

例外：

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/csv/CSVFormat 
at java.lang.Class.getDeclaredMethods0(Native Method) 
at java.lang.Class.privateGetDeclaredMethods(Class.java:2442) 
at java.lang.Class.getDeclaredMethods(Class.java:1808) 
at  org.apache.logging.log4j.core.config.plugins.util.PluginBuilder.createBuilder(PluginBuilder.java:149) 
at org.apache.logging.log4j.core.config.plugins.util.PluginBuilder.build(PluginBuilder.java:119) 
at org.apache.logging.log4j.core.config.AbstractConfiguration.createPluginObject(AbstractConfiguration.java:888) 
at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:828) 
at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:820) 
at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:820) 
at org.apache.logging.log4j.core.config.AbstractConfiguration.doConfigure(AbstractConfiguration.java:449) 
at org.apache.logging.log4j.core.config.AbstractConfiguration.initialize(AbstractConfiguration.java:197) 
at org.apache.logging.log4j.core.config.AbstractConfiguration.start(AbstractConfiguration.java:209) 
at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:492) 
at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:562) 
at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:578) 
at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:214) 
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:145) 
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:41) 
at org.apache.logging.log4j.LogManager.getContext(LogManager.java:182) 
at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:455) 
at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:441) 
at log4j_tutorial.CsvParameterLayoutExample.<clinit>(CsvParameterLayoutExample.java:7) 
Caused by: java.lang.ClassNotFoundException: org.apache.commons.csv.CSVFormat 
at java.net.URLClassLoader$1.run(URLClassLoader.java:366) 
at java.net.URLClassLoader$1.run(URLClassLoader.java:355) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.net.URLClassLoader.findClass(URLClassLoader.java:354) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:423) 
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) 
at java.lang.ClassLoader.loadClass(ClassLoader.java:356) 
... 22 more

，我從早上卡住... :(

來源

2016-07-28 Bishal Gupta

你必須添加commons-c sv作爲依賴。

如果使用gradle這個作爲你的問題進行標記，添加這些行：

// https://mvnrepository.com/artifact/org.apache.commons/commons-csv 
compile group: 'org.apache.commons', name: 'commons-csv', version: '1.4'

來源

2016-07-28 10:39:06 Jens

日Thnx快速回復......我想這在gradle這個，但不知道爲什麼gradle這個沒有下載這個jar ... :(所以我說在外部。 ..你能告訴我y gradle是不是正在下載 –

@BishalGupta下載任何錯誤信息？ – Jens

不，我沒有收到任何錯誤信息 –

的build.gradle無法下載我提到的jar：

的build.gradle：「編譯「組織.apache.commons：公地CSV：1.1"

所以，我從下面的鏈接下載公地CSV罐和外部添加到項目

commons-csv.jar

二進制文件：commons-csv-1.4-bin.zip

來源

2016-07-28 10:49:31

異常在線程「主要」 java.lang.NoClassDefFoundError：組織/阿帕奇/公/ CSV/CSVFormat

回答

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