我用三个类文件在 IntelliJ 中创建了一个 maven 项目:
package mavenKris;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;
import java.io.IOException;
import java.util.StringTokenizer;
/**
* Created with IntelliJ IDEA.
* User: kshk
* Date: 11/27/13
* Time: 2:27 PM
* To change this template use File | Settings | File Templates.
*/
public class WordMapper extends Mapper<Text,Text,Text,Text> {
private Text word = new Text();
public void map(Text key, Text value, Context context) throws IOException, InterruptedException
{
StringTokenizer itr = new StringTokenizer(value.toString(),",");
while (itr.hasMoreTokens())
{
word.set(itr.nextToken());
context.write(key, word);
}
}
}
和
package mavenKris;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Reducer;
import java.io.IOException;
/**
* Created with IntelliJ IDEA.
* User: kshk
* Date: 11/27/13
* Time: 2:29 PM
* To change this template use File | Settings | File Templates.
*/
public class AllTranslationsReducer extends Reducer<Text, Text, Text, Text> {
private Text result = new Text();
@Override
protected void reduce(Text key, Iterable<Text> values, Context context) throws IOException, InterruptedException {
String translations = "";
for (Text val : values) {
translations += "|" + val.toString();
}
result.set(translations);
context.write(key, result);
}
}
和主要...
package mavenKris;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.input.KeyValueTextInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;
import java.io.IOException;
/**
* Created with IntelliJ IDEA.
* User: kshk
* Date: 11/27/13
* Time: 2:30 PM
* To change this template use File | Settings | File Templates.
*/
public class Dictionary {
public static void main(String[] args) throws Exception
{
Configuration conf = new Configuration();
Job job = new Job(conf, "dictionary");
job.setJarByClass(Dictionary.class);
job.setMapperClass(WordMapper.class);
job.setReducerClass(AllTranslationsReducer.class);
job.setOutputKeyClass(Text.class);
job.setOutputValueClass(Text.class);
job.setMapOutputKeyClass(Text.class);
job.setMapOutputValueClass(Text.class);
job.setInputFormatClass(KeyValueTextInputFormat.class);
job.setOutputFormatClass(TextOutputFormat.class);
FileInputFormat.addInputPath(job, new Path(args[0]));
FileOutputFormat.setOutputPath(job, new Path(args[1]));
boolean result = job.waitForCompletion(true);
System.exit(result ? 0 : 1);
}
}
这就是 pom.xml 的样子
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>mavenKris</groupId>
<artifactId>mavenKris</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>mavenKris</name>
<url>http://maven.apache.org</url>
<repositories>
<repository>
<id>anorak-releases</id>
<url>http://ip-10-40-3-96.cloud.trendinglines.co.uk:8081/nexus/content/repositories/releases/</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
<repository>
<id>atlassian-releases</id>
<url>http://repository.opencastproject.org/nexus/content/repositories/atlassian/</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
<repository>
<id>central</id>
<name>Maven Central</name>
<url>http://repo1.maven.org/maven2/</url>
</repository>
</repositories>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-core</artifactId>
<version>1.0.3-gphd-1.2.0.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
</project>
我正在使用 hadoop 的 greenplum 发行版，现在......当我运行上面的项目时，我得到这个错误....
/usr/java/jdk1.7.0_40/bin/java -Didea.launcher.port=7551 -Didea.launcher.bin.path=/home/kshk/Software/idea-IC-129.1359/bin -Dfile.encoding=UTF-8 -classpath /usr/java/jdk1.7.0_40/jre/lib/jce.jar:/usr/java/jdk1.7.0_40/jre/lib/management-agent.jar:/usr/java/jdk1.7.0_40/jre/lib/resources.jar:/usr/java/jdk1.7.0_40/jre/lib/jfr.jar:/usr/java/jdk1.7.0_40/jre/lib/jsse.jar:/usr/java/jdk1.7.0_40/jre/lib/rt.jar:/usr/java/jdk1.7.0_40/jre/lib/plugin.jar:/usr/java/jdk1.7.0_40/jre/lib/deploy.jar:/usr/java/jdk1.7.0_40/jre/lib/charsets.jar:/usr/java/jdk1.7.0_40/jre/lib/javaws.jar:/usr/java/jdk1.7.0_40/jre/lib/jfxrt.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/zipfs.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/localedata.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/sunpkcs11.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/sunec.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/dnsns.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/sunjce_provider.jar:/home/kshk/IdeaProjects/mavenKris/target/classes:/home/kshk/Software/idea-IC-129.1359/lib/idea_rt.jar com.intellij.rt.execution.application.AppMain mavenKris.Dictionary
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/conf/Configuration
at mavenKris.Dictionary.main(Dictionary.java:24)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.conf.Configuration
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 6 more
Process finished with exit code 1
有什么想法吗？
更新:
如果我从命令行指定类路径的路径，它调用字典类但给出错误，所以我的 IDE 上必须有一些设置，它没有在运行时指定 hadoop-core 的类路径.....
[kshk@localhost mavenKris]$ /usr/java/jdk1.7.0_40/bin/java -Didea.launcher.port=7537 -Didea.launcher.bin.path=/home/kshk/Software/idea-IC-129.1359/bin -Dfile.encoding=UTF-8 -classpath /usr/java/jdk1.7.0_40/jre/lib/jce.jar:/usr/java/jdk1.7.0_40/jre/lib/management-agent.jar:/usr/java/jdk1.7.0_40/jre/lib/resources.jar:/usr/java/jdk1.7.0_40/jre/lib/jfr.jar:/usr/java/jdk1.7.0_40/jre/lib/jsse.jar:/usr/java/jdk1.7.0_40/jre/lib/rt.jar:/usr/java/jdk1.7.0_40/jre/lib/plugin.jar:/usr/java/jdk1.7.0_40/jre/lib/deploy.jar:/usr/java/jdk1.7.0_40/jre/lib/charsets.jar:/usr/java/jdk1.7.0_40/jre/lib/javaws.jar:/usr/java/jdk1.7.0_40/jre/lib/jfxrt.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/zipfs.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/localedata.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/sunpkcs11.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/sunec.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/dnsns.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/sunjce_provider.jar:/home/kshk/IdeaProjects/mavenKris/target/classes:/home/kshk/Software/idea-IC-129.1359/lib/idea_rt.jar:/home/kshk/.m2/repository/org/apache/hadoop/hadoop-core/1.0.3-gphd-1.2.0.0/hadoop-core-1.0.3-gphd-1.2.0.0.jar com.intellij.rt.execution.application.AppMain mavenKris.Dictionary
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
at org.apache.hadoop.conf.Configuration.<clinit>(Configuration.java:143)
at mavenKris.Dictionary.main(Dictionary.java:25)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 7 more
[kshk@localhost mavenKris]$
更新 2:
将路径添加到 commons-logging-1.0.3.jar 之后............
[kshk@localhost repository]$ /usr/java/jdk1.7.0_40/bin/java -Didea.launcher.port=7537 -Didea.launcher.bin.path=/home/kshk/Software/idea-IC-129.1359/bin -Dfile.encoding=UTF-8 -classpath /usr/java/jdk1.7.0_40/jre/lib/jce.jar:/usr/java/jdk1.7.0_40/jre/lib/management-agent.jar:/usr/java/jdk1.7.0_40/jre/lib/resources.jar:/usr/java/jdk1.7.0_40/jre/lib/jfr.jar:/usr/java/jdk1.7.0_40/jre/lib/jsse.jar:/usr/java/jdk1.7.0_40/jre/lib/rt.jar:/usr/java/jdk1.7.0_40/jre/lib/plugin.jar:/usr/java/jdk1.7.0_40/jre/lib/deploy.jar:/usr/java/jdk1.7.0_40/jre/lib/charsets.jar:/usr/java/jdk1.7.0_40/jre/lib/javaws.jar:/usr/java/jdk1.7.0_40/jre/lib/jfxrt.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/zipfs.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/localedata.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/sunpkcs11.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/sunec.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/dnsns.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/sunjce_provider.jar:/home/kshk/IdeaProjects/mavenKris/target/classes:/home/kshk/Software/idea-IC-129.1359/lib/idea_rt.jar:/home/kshk/.m2/repository/org/apache/hadoop/hadoop-core/1.0.3-gphd-1.2.0.0/hadoop-core-1.0.3-gphd-1.2.0.0.jar:/home/kshk/.m2/repository/commons-logging/commons-logging/1.0.3/commons-logging-1.0.3.jar com.intellij.rt.execution.application.AppMain mavenKris.Dictionary
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/configuration/Configuration
at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.<init>(DefaultMetricsSystem.java:37)
at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.<clinit>(DefaultMetricsSystem.java:34)
at org.apache.hadoop.security.UgiInstrumentation.create(UgiInstrumentation.java:51)
at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:216)
at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:184)
at org.apache.hadoop.security.UserGroupInformation.isSecurityEnabled(UserGroupInformation.java:236)
at org.apache.hadoop.security.KerberosName.<clinit>(KerberosName.java:79)
at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:209)
at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:184)
at org.apache.hadoop.security.UserGroupInformation.isSecurityEnabled(UserGroupInformation.java:236)
at org.apache.hadoop.security.UserGroupInformation.getLoginUser(UserGroupInformation.java:466)
at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:452)
at org.apache.hadoop.mapreduce.JobContext.<init>(JobContext.java:80)
at org.apache.hadoop.mapreduce.Job.<init>(Job.java:50)
at org.apache.hadoop.mapreduce.Job.<init>(Job.java:54)
at mavenKris.Dictionary.main(Dictionary.java:26)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.configuration.Configuration
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 21 more
更新 3:
添加:/home/kshk/.m2/repository/commons-configuration/commons-configuration/1.6/commons-configuration-1.6.jar 到路径....
[kshk@localhost repository]$ /usr/java/jdk1.7.0_40/bin/java -Didea.launcher.port=7537 -Didea.launcher.bin.path=/home/kshk/Software/idea-IC-129.1359/bin -Dfile.encoding=UTF-8 -classpath /usr/java/jdk1.7.0_40/jre/lib/jce.jar:/usr/java/jdk1.7.0_40/jre/lib/management-agent.jar:/usr/java/jdk1.7.0_40/jre/lib/resources.jar:/usr/java/jdk1.7.0_40/jre/lib/jfr.jar:/usr/java/jdk1.7.0_40/jre/lib/jsse.jar:/usr/java/jdk1.7.0_40/jre/lib/rt.jar:/usr/java/jdk1.7.0_40/jre/lib/plugin.jar:/usr/java/jdk1.7.0_40/jre/lib/deploy.jar:/usr/java/jdk1.7.0_40/jre/lib/charsets.jar:/usr/java/jdk1.7.0_40/jre/lib/javaws.jar:/usr/java/jdk1.7.0_40/jre/lib/jfxrt.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/zipfs.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/localedata.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/sunpkcs11.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/sunec.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/dnsns.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/sunjce_provider.jar:/home/kshk/IdeaProjects/mavenKris/target/classes:/home/kshk/Software/idea-IC-129.1359/lib/idea_rt.jar:/home/kshk/.m2/repository/org/apache/hadoop/hadoop-core/1.0.3-gphd-1.2.0.0/hadoop-core-1.0.3-gphd-1.2.0.0.jar:/home/kshk/.m2/repository/commons-logging/commons-logging/1.0.3/commons-logging-1.0.3.jar:/home/kshk/.m2/repository/commons-configuration/commons-configuration/1.6/commons-configuration-1.6.jar com.intellij.rt.execution.application.AppMain mavenKris.Dictionary
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/lang/StringUtils
at org.apache.hadoop.metrics2.lib.MetricMutableStat.<init>(MetricMutableStat.java:59)
at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.<init>(MetricsSystemImpl.java:75)
at org.apache.hadoop.metrics2.impl.MetricsSystemImpl.<init>(MetricsSystemImpl.java:120)
at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.<init>(DefaultMetricsSystem.java:37)
at org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.<clinit>(DefaultMetricsSystem.java:34)
at org.apache.hadoop.security.UgiInstrumentation.create(UgiInstrumentation.java:51)
at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:216)
at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:184)
at org.apache.hadoop.security.UserGroupInformation.isSecurityEnabled(UserGroupInformation.java:236)
at org.apache.hadoop.security.KerberosName.<clinit>(KerberosName.java:79)
at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:209)
at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:184)
at org.apache.hadoop.security.UserGroupInformation.isSecurityEnabled(UserGroupInformation.java:236)
at org.apache.hadoop.security.UserGroupInformation.getLoginUser(UserGroupInformation.java:466)
at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:452)
at org.apache.hadoop.mapreduce.JobContext.<init>(JobContext.java:80)
at org.apache.hadoop.mapreduce.Job.<init>(Job.java:50)
at org.apache.hadoop.mapreduce.Job.<init>(Job.java:54)
at mavenKris.Dictionary.main(Dictionary.java:26)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang.StringUtils
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 24 more
更新 4:
添加:/home/kshk/.m2/repository/commons-lang/commons-lang/2.1/commons-lang-2.1.jar 到类路径
[kshk@localhost tmp]$ /usr/java/jdk1.7.0_40/bin/java -Didea.launcher.port=7537 -Didea.launcher.bin.path=/home/kshk/Software/idea-IC-129.1359/bin -Dfile.encoding=UTF-8 -classpath /usr/java/jdk1.7.0_40/jre/lib/jce.jar:/usr/java/jdk1.7.0_40/jre/lib/management-agent.jar:/usr/java/jdk1.7.0_40/jre/lib/resources.jar:/usr/java/jdk1.7.0_40/jre/lib/jfr.jar:/usr/java/jdk1.7.0_40/jre/lib/jsse.jar:/usr/java/jdk1.7.0_40/jre/lib/rt.jar:/usr/java/jdk1.7.0_40/jre/lib/plugin.jar:/usr/java/jdk1.7.0_40/jre/lib/deploy.jar:/usr/java/jdk1.7.0_40/jre/lib/charsets.jar:/usr/java/jdk1.7.0_40/jre/lib/javaws.jar:/usr/java/jdk1.7.0_40/jre/lib/jfxrt.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/zipfs.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/localedata.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/sunpkcs11.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/sunec.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/dnsns.jar:/usr/java/jdk1.7.0_40/jre/lib/ext/sunjce_provider.jar:/home/kshk/IdeaProjects/mavenKris/target/classes:/home/kshk/Software/idea-IC-129.1359/lib/idea_rt.jar:/home/kshk/.m2/repository/org/apache/hadoop/hadoop-core/1.0.3-gphd-1.2.0.0/hadoop-core-1.0.3-gphd-1.2.0.0.jar:/home/kshk/.m2/repository/commons-logging/commons-logging/1.0.3/commons-logging-1.0.3.jar:/home/kshk/.m2/repository/commons-configuration/commons-configuration/1.6/commons-configuration-1.6.jar:/home/kshk/.m2/repository/commons-lang/commons-lang/2.1/commons-lang-2.1.jar com.intellij.rt.execution.application.AppMain mavenKris.Dictionary
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at mavenKris.Dictionary.main(Dictionary.java:37)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
[kshk@localhost tmp]$
编辑:
intellij 中的库 jar
最佳答案
由于您是从 IDE 运行它，因此您应该首先将 pom 更改为:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>mavenKris</groupId>
<artifactId>mavenKris</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>mavenKris</name>
<url>http://maven.apache.org</url>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>anorak-releases</id>
<url>http://ip-10-40-3-96.cloud.trendinglines.co.uk:8081/nexus/content/repositories/releases/</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
<repository>
<id>atlassian-releases</id>
<url>http://repository.opencastproject.org/nexus/content/repositories/atlassian/</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
<repository>
<id>central</id>
<name>Maven Central</name>
<url>http://repo1.maven.org/maven2/</url>
</repository>
</repositories>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-core</artifactId>
<version>1.0.3-gphd-1.2.0.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
</project>
我想 anorak-releases 是本地 mvn 存储库，并且您在那里有 hadoop-core。检查它是否存在，因为它对我不起作用，所以我不得不输入:
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-core</artifactId>
<version>0.20.2</version>
</dependency>
而不是让它工作。
在 InteliJ 中右键单击 pom 文件并选择“同步 POM”以导入适当的库。然后从 IDE 启动程序。
此命令行之后如下所示:
/usr/lib/jvm/java-6-sun-1.6.0.26/bin/java -Didea.launcher.port=7533 -Didea.launcher.bin.path=/opt/instalations/idea-IU-123.169/bin -Dfile.encoding=UTF-8 -classpath /usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/jce.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/javaws.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/plugin.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/charsets.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/management-agent.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/rt.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/jsse.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/deploy.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/resources.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/ext/sunjce_provider.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/ext/dnsns.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/ext/sunpkcs11.jar:/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/ext/localedata.jar:/work/eLearning/reactive_scala/hw2/untitled/mavenKris/target/classes:/root/.m2/repository/org/apache/hadoop/hadoop-core/0.20.2/hadoop-core-0.20.2.jar:/root/.m2/repository/commons-cli/commons-cli/1.2/commons-cli-1.2.jar:/root/.m2/repository/xmlenc/xmlenc/0.52/xmlenc-0.52.jar:/root/.m2/repository/commons-httpclient/commons-httpclient/3.0.1/commons-httpclient-3.0.1.jar:/root/.m2/repository/commons-logging/commons-logging/1.0.3/commons-logging-1.0.3.jar:/root/.m2/repository/commons-codec/commons-codec/1.3/commons-codec-1.3.jar:/root/.m2/repository/commons-net/commons-net/1.4.1/commons-net-1.4.1.jar:/root/.m2/repository/oro/oro/2.0.8/oro-2.0.8.jar:/root/.m2/repository/org/mortbay/jetty/jetty/6.1.14/jetty-6.1.14.jar:/root/.m2/repository/org/mortbay/jetty/jetty-util/6.1.14/jetty-util-6.1.14.jar:/root/.m2/repository/org/mortbay/jetty/servlet-api-2.5/6.1.14/servlet-api-2.5-6.1.14.jar:/root/.m2/repository/tomcat/jasper-runtime/5.5.12/jasper-runtime-5.5.12.jar:/root/.m2/repository/tomcat/jasper-compiler/5.5.12/jasper-compiler-5.5.12.jar:/root/.m2/repository/org/mortbay/jetty/jsp-api-2.1/6.1.14/jsp-api-2.1-6.1.14.jar:/root/.m2/repository/org/mortbay/jetty/jsp-2.1/6.1.14/jsp-2.1-6.1.14.jar:/root/.m2/repository/org/eclipse/jdt/core/3.1.1/core-3.1.1.jar:/root/.m2/repository/ant/ant/1.6.5/ant-1.6.5.jar:/root/.m2/repository/commons-el/commons-el/1.0/commons-el-1.0.jar:/root/.m2/repository/net/java/dev/jets3t/jets3t/0.7.1/jets3t-0.7.1.jar:/root/.m2/repository/net/sf/kosmosfs/kfs/0.3/kfs-0.3.jar:/root/.m2/repository/hsqldb/hsqldb/1.8.0.10/hsqldb-1.8.0.10.jar:/opt/instalations/idea-IU-123.169/lib/idea_rt.jar com.intellij.rt.execution.application.AppMain mavenKris.Dictionary dictionary.txt output.txt
关于java - maven intellij java mapreduce 测试程序，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20246590/
很好奇，就使用rubyonrails自动化单元测试而言，你们正在做什么？您是否创建了一个脚本来在cron中运行rake作业并将结果邮寄给您？git中的预提交Hook？只是手动调用？我完全理解测试，但想知道在错误发生之前捕获错误的最佳实践是什么。让我们理所当然地认为测试本身是完美无缺的，并且可以正常工作。下一步是什么以确保他们在正确的时间将可能有害的结果传达给您？ 最佳答案 不确定您到底想听什么，但是有几个级别的自动代码库控制:在处理某项功能时，您可以使用类似autotest的内容获得关于哪些有效，哪些无效的即时反馈。要确保您的提
我需要在客户计算机上运行Ruby应用程序。通常需要几天才能完成(复制大备份文件)。问题是如果启用sleep，它会中断应用程序。否则，计算机将持续运行数周，直到我下次访问为止。有什么方法可以防止执行期间休眠并让Windows在执行后休眠吗？欢迎任何疯狂的想法;-) 最佳答案 Here建议使用SetThreadExecutionStateWinAPI函数，使应用程序能够通知系统它正在使用中，从而防止系统在应用程序运行时进入休眠状态或关闭显示。像这样的东西:require'Win32API'ES_AWAYMODE_REQUIRED=0x0
Rackup通过Rack的默认处理程序成功运行任何Rack应用程序。例如:classRackAppdefcall(environment)['200',{'Content-Type'=>'text/html'},["Helloworld"]]endendrunRackApp.new但是当最后一行更改为使用Rack的内置CGI处理程序时，rackup给出“NoMethodErrorat/undefinedmethod`call'fornil:NilClass”:Rack::Handler::CGI.runRackApp.newRack的其他内置处理程序也提出了同样的反对意见。例如Rack
我想用ruby编写一个小的命令行实用程序并将其作为gem分发。我知道安装后，Guard、Sass和Thor等某些gem可以从命令行自行运行。为了让gem像二进制文件一样可用，我需要在我的gemspec中指定什么。 最佳答案 Gem::Specification.newdo|s|...s.executable='name_of_executable'...endhttp://docs.rubygems.org/read/chapter/20 关于ruby-在Ruby中编写命令行实用程序
我正在编写一个包含C扩展的gem。通常当我写一个gem时，我会遵循TDD的过程，我会写一个失败的规范，然后处理代码直到它通过，等等......在“ext/mygem/mygem.c”中我的C扩展和在gemspec的“扩展”中配置的有效extconf.rb，如何运行我的规范并仍然加载我的C扩展？当我更改C代码时，我需要采取哪些步骤来重新编译代码？这可能是个愚蠢的问题，但是从我的gem的开发源代码树中输入“bundleinstall”不会构建任何native扩展。当我手动运行rubyext/mygem/extconf.rb时，我确实得到了一个Makefile(在整个项目的根目录中)，然后当
我构建了两个需要相互通信和发送文件的Rails应用程序。例如，一个Rails应用程序会发送请求以查看其他应用程序数据库中的表。然后另一个应用程序将呈现该表的json并将其发回。我还希望一个应用程序将存储在其公共(public)目录中的文本文件发送到另一个应用程序的公共(public)目录。我从来没有做过这样的事情，所以我什至不知道从哪里开始。任何帮助，将不胜感激。谢谢! 最佳答案 无论Rails是什么，几乎所有Web应用程序都有您的要求，大多数现代Web应用程序都需要相互通信。但是有一个小小的理解需要你坚持下去，网站不应直接访问彼此
我尝试运行2.x应用程序。我使用rvm并为此应用程序设置其他版本的ruby:$rvmuseree-1.8.7-head我尝试运行服务器，然后出现很多错误:$script/serverNOTE:Gem.source_indexisdeprecated,useSpecification.Itwillberemovedonorafter2011-11-01.Gem.source_indexcalledfrom/Users/serg/rails_projects_terminal/work_proj/spohelp/config/../vendor/rails/railties/lib/r
我有一个围绕一些对象的包装类，我想将这些对象用作散列中的键。包装对象和解包装对象应映射到相同的键。一个简单的例子是这样的:classAattr_reader:xdefinitialize(inner)@inner=innerenddefx;@inner.x;enddef==(other)@inner.x==other.xendenda=A.new(o)#oisjustanyobjectthatallowso.xb=A.new(o)h={a=>5}ph[a]#5ph[b]#nil,shouldbe5ph[o]#nil,shouldbe5我试过==、===、eq?并散列所有无济于事。
我有一些Ruby代码，如下所示:Something.createdo|x|x.foo=barend我想编写一个测试，它使用double代替block参数x，这样我就可以调用:x_double.should_receive(:foo).with("whatever").这可能吗？ 最佳答案 specify'something'dox=doublex.should_receive(:foo=).with("whatever")Something.should_receive(:create).and_yield(x)#callthere
刚入门rails，开始慢慢理解。有人可以解释或给我一些关于在application_controller中编码的好处或时间和原因的想法吗？有哪些用例。您如何为Rails应用程序使用应用程序Controller？我不想在那里放太多代码，因为据我了解，每个请求都会调用此Controller。这是真的？ 最佳答案 ApplicationController实际上是您应用程序中的每个其他Controller都将从中继承的类(尽管这不是强制性的)。我同意不要用太多代码弄乱它并保持干净整洁的态度，尽管在某些情况下ApplicationContr