Eclipse/MyEclipse下如何Maven管理多个Mapreduce程序？（企业级水平）

　　不多说，直接上干货！

如何在Maven官网下载历史版本

Eclipse下Maven新建项目、自动打依赖jar包（包含普通项目和Web项目）

Eclipse下Maven新建Web项目index.jsp报错完美解决（war包）

HBase 开发环境搭建（EclipseMyEclipse + Maven）

Zookeeper项目开发环境搭建（EclipseMyEclipse + Maven）

Hive项目开发环境搭建（EclipseMyEclipse + Maven）

MapReduce 开发环境搭建（EclipseMyEclipse + Maven）

Hadoop项目开发环境搭建（EclipseMyEclipse + Maven）

第一步：

第二步：

第三步：

第四步：

第五步：

 第六步：

第七步：默认的

 

<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>zhouls.bigdata</groupId>
  <artifactId>enterpriseMyHadoop</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>enterpriseMyHadoop</name>
  <url>http://maven.apache.org</url>

  <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>
  </dependencies>
</project>

第八步：修改得到

<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>zhouls.bigdata.enterpriseMyHadoop</groupId>
    <artifactId>enterpriseMyHadoop</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>test</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <hadoop.version>2.6.0</hadoop.version>
    </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-common</artifactId>
            <version>${hadoop.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.hadoop</groupId>
            <artifactId>hadoop-hdfs</artifactId>
            <version>${hadoop.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.hadoop</groupId>
            <artifactId>hadoop-client</artifactId>
            <version>${hadoop.version}</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>2.4.1</version>
                <executions>
                    <!-- Run shade goal on package phase -->
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <transformers>
                                <!-- add Main-Class to manifest file -->
                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                    <mainClass>zhouls.bigdata.enterpriseMyHadoop.MyDriver</mainClass>
                                </transformer>
                            </transformers>
                            <createDependencyReducedPom>false</createDependencyReducedPom>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>
        

第九步：写代码

 

WordCount.java

package zhouls.bigdata.enterpriseMyHadoop;

import java.io.IOException;
import java.util.StringTokenizer;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.Reducer;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.input.TextInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;
import org.apache.hadoop.util.Tool;
@SuppressWarnings("unused")// 屏蔽java编译中的一些警告信息
public class WordCount extends Configured implements Tool{

    public static class TokenizerMapper extends
            Mapper<Object, Text, Text, IntWritable>
            //这个Mapper类是一个泛型类型，它有四个形参类型，分别指定map函数的输入键、输入值、输出键、输出值的类型。hadoop没有直接使用Java内嵌的类型，而是自己开发了一套可以优化网络序列化传输的基本类型。这些类型都在org.apache.hadoop.io包中。
            //比如这个例子中的Object类型，适用于字段需要使用多种类型的时候，Text类型相当于Java中的String类型，IntWritable类型相当于Java中的Integer类型
            {
            //定义两个变量
        private final static IntWritable one = new IntWritable(1);//这个1表示每个单词出现一次，map的输出value就是1.
        private Text word = new Text();
        
        public void map(Object key, Text value, Context context)
        //context它是mapper的一个内部类，简单的说顶级接口是为了在map或是reduce任务中跟踪task的状态，很自然的MapContext就是记录了map执行的上下文，在mapper类中，这个context可以存储一些job conf的信息，比如job运行时参数等，我们可以在map函数中处理这个信息，这也是Hadoop中参数传递中一个很经典的例子，同时context作为了map和reduce执行中各个函数的一个桥梁，这个设计和Java web中的session对象、application对象很相似
        //简单的说context对象保存了作业运行的上下文信息，比如：作业配置信息、InputSplit信息、任务ID等
        //我们这里最直观的就是主要用到context的write方法。
                throws IOException, InterruptedException {
            //The tokenizer uses the default delimiter set, which is " 	

": the space character, the tab character, the newline character, the carriage-return character
            StringTokenizer itr = new StringTokenizer(value.toString());//将Text类型的value转化成字符串类型
            //StringTokenizer是字符串分隔解析类型,StringTokenizer 用来分割字符串，你可以指定分隔符，比如','，或者空格之类的字符。
            while (itr.hasMoreTokens()) {//hasMoreTokens() 方法是用来测试是否有此标记生成器的字符串可用更多的标记。
                    //java.util.StringTokenizer.hasMoreTokens()
                word.set(itr.nextToken());//nextToken()这是 StringTokenizer 类下的一个方法,nextToken() 用于返回下一个匹配的字段。
                context.write(word, one);
            }
        }
    }

    public static class IntSumReducer extends
            Reducer<Text, IntWritable, Text, IntWritable> {
        private IntWritable result = new IntWritable();
        public void reduce(Text key, Iterable<IntWritable> values,
                Context context) throws IOException, InterruptedException {
            int sum = 0;
            for (IntWritable val : values) {
                sum += val.get();
            }
            result.set(sum);
            context.write(key, result);
        }
    }

    public static void main(String[] args) throws Exception {
        Configuration conf = new Configuration();
        //Configuration类代表作业的配置，该类会加载mapred-site.xml、hdfs-site.xml、core-site.xml等配置文件。
        //删除已经存在的输出目录
        Path mypath = new Path("hdfs://djt002:9000/outData/wordcount-out");//输出路径
        FileSystem hdfs = mypath.getFileSystem(conf);//获取文件系统
        //如果文件系统中存在这个输出路径，则删除掉，保证输出目录不能提前存在。
        if (hdfs.isDirectory(mypath)) {
            hdfs.delete(mypath, true);
        }
        //job对象指定了作业执行规范，可以用它来控制整个作业的运行。
        Job job = Job.getInstance();// new Job(conf, "word count");
        job.setJarByClass(WordCount.class);//我们在hadoop集群上运行作业的时候，要把代码打包成一个jar文件，然后把这个文件
        //传到集群上，然后通过命令来执行这个作业，但是命令中不必指定JAR文件的名称，在这条命令中通过job对象的setJarByClass（）
        //中传递一个主类就行，hadoop会通过这个主类来查找包含它的JAR文件。
        
        job.setMapperClass(TokenizerMapper.class);
        //job.setReducerClass(IntSumReducer.class);
        job.setCombinerClass(IntSumReducer.class);
        
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(IntWritable.class);
        //一般情况下mapper和reducer的输出的数据类型是一样的，所以我们用上面两条命令就行，如果不一样，我们就可以用下面两条命令单独指定mapper的输出key、value的数据类型
        //job.setMapOutputKeyClass(Text.class);
        //job.setMapOutputValueClass(IntWritable.class);
        //hadoop默认的是TextInputFormat和TextOutputFormat,所以说我们这里可以不用配置。
        //job.setInputFormatClass(TextInputFormat.class);
        //job.setOutputFormatClass(TextOutputFormat.class);
        
        FileInputFormat.addInputPath(job, new Path(
                "hdfs://djt002:9000/inputData/wordcount/wc.txt"));//FileInputFormat.addInputPath（）指定的这个路径可以是单个文件、一个目录或符合特定文件模式的一系列文件。
        //从方法名称可以看出，可以通过多次调用这个方法来实现多路径的输入。        
        FileOutputFormat.setOutputPath(job, new Path(
                "hdfs://djt002:9000/outData/wordcount-out"));//只能有一个输出路径，该路径指定的就是reduce函数输出文件的写入目录。
        //特别注意：输出目录不能提前存在，否则hadoop会报错并拒绝执行作业，这样做的目的是防止数据丢失，因为长时间运行的作业如果结果被意外覆盖掉，那肯定不是我们想要的
        System.exit(job.waitForCompletion(true) ? 0 : 1);
        //使用job.waitForCompletion（）提交作业并等待执行完成，该方法返回一个boolean值，表示执行成功或者失败，这个布尔值被转换成程序退出代码0或1，该布尔参数还是一个详细标识，所以作业会把进度写到控制台。
        //waitForCompletion(）提交作业后，每秒会轮询作业的进度，如果发现和上次报告后有改变，就把进度报告到控制台，作业完成后，如果成功就显示作业计数器，如果失败则把导致作业失败的错误输出到控制台
    }

    public int run(String[] args) throws Exception {
        // TODO Auto-generated method stub
        return 0;
    }
}




//TextInputFormat是hadoop默认的输入格式，这个类继承自FileInputFormat,使用这种输入格式，每个文件都会单独作为Map的输入，每行数据都会生成一条记录，每条记录会表示成<key，value>的形式。
//key的值是每条数据记录在数据分片中的字节偏移量，数据类型是LongWritable.
//value的值为每行的内容，数据类型为Text。
//
//实际上InputFormat（）是用来生成可供Map处理的<key，value>的。
//InputSplit是hadoop中用来把输入数据传送给每个单独的Map(也就是我们常说的一个split对应一个Map),
//InputSplit存储的并非数据本身，而是一个分片长度和一个记录数据位置的数组。
//生成InputSplit的方法可以通过InputFormat（）来设置。
//当数据传给Map时，Map会将输入分片传送给InputFormat（），InputFormat()则调用getRecordReader()生成RecordReader,RecordReader则再通过creatKey()和creatValue()创建可供Map处理的<key，value>对。
//
//OutputFormat()
//默认的输出格式为TextOutputFormat。它和默认输入格式类似，会将每条记录以一行的形式存入文本文件。它的键和值可以是任意形式的，因为程序内部会调用toString()将键和值转化为String类型再输出。

MyDriver.java

package zhouls.bigdata.enterpriseMyHadoop;


import org.apache.hadoop.util.ProgramDriver;
/*
 * 管理所有MapReduce 程序
 */
public class MyDriver {
    public static void main(String argv[]){
        int exitCode = -1;
        ProgramDriver pgd = new ProgramDriver();
        try {
          pgd.addClass("wordcount", WordCount.class, 
                       "A map/reduce program that counts the words in the input files.");
   
          exitCode = pgd.run(argv);
        }
        catch(Throwable e){
          e.printStackTrace();
        }
        
        System.exit(exitCode);
    }
}

 　　注意的是，在这里，我们可以随着以后的业务，添加。

pgd.addClass("wordcount1", WordCount1.class, 
                        "A map/reduce program that counts the words in the input files.");

pgd.addClass("wordcount2", WordCount2.class, 
                        "A map/reduce program that counts the words in the input files.");

　....等

　　这里的wordcount1是WordCount1.class的别名。即比如我们打jar包到hadoop集群，在我们的任何路径下，执行

$HADOOP_HOME/bin/hadoop  jar   enterpriseMyHadoop-1.0-SNAPSHOT.jar  wordcount1  hdfs://djt002:9000/inputData/wordcount/wc.txt   hdfs://djt002:9000/outData/wordcount-out

enterpriseMyHadoop-1.0-SNAPSHOT.jar是我们打好的jar包名

wordcount1是我们的类的别名，即这样可以方便替代冗余的书写。

hdfs://djt002:9000/inputData/wordcount/wc.txt是输入路径

hdfs://djt002:9000/outData/wordcount-out是输出路径

第十步：打jar包

 

Microsoft Windows [版本 6.1.7601]
版权所有 (c) 2009 Microsoft Corporation。保留所有权利。

C:UsersAdministrator>D:

D:>cd D:CodeMyEclipseJavaCodeenterpriseMyHadoop

D:CodeMyEclipseJavaCodeenterpriseMyHadoop>mvn clean
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building test 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ enterpriseMyHadoop ---

[INFO] Deleting D:CodeMyEclipseJavaCodeenterpriseMyHadoop arget
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.509 s
[INFO] Finished at: 2017-03-10T16:50:56+08:00
[INFO] Final Memory: 6M/122M
[INFO] ------------------------------------------------------------------------

D:CodeMyEclipseJavaCodeenterpriseMyHadoop>

 

D:CodeMyEclipseJavaCodeenterpriseMyHadoop>mvn package
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building test 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ enterprise
MyHadoop ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory D:CodeMyEclipseJavaCodeenterpriseM
yHadoopsrcmain esources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ enterpriseMyHad
oop ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 2 source files to D:CodeMyEclipseJavaCodeenterpriseMyHadoop
targetclasses
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ en
terpriseMyHadoop ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory D:CodeMyEclipseJavaCodeenterpriseM
yHadoopsrc est esources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ enterpr
iseMyHadoop ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 1 source file to D:CodeMyEclipseJavaCodeenterpriseMyHadoop
arget est-classes
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ enterpriseMyHadoop
---
[INFO] Surefire report directory: D:CodeMyEclipseJavaCodeenterpriseMyHadoop
argetsurefire-reports

-------------------------------------------------------
T E S T S
-------------------------------------------------------
Running zhouls.bigdata.enterpriseMyHadoop.AppTest
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.008 sec

Results :

Tests run: 1, Failures: 0, Errors: 0, Skipped: 0

[INFO]
[INFO] --- maven-jar-plugin:2.4:jar (default-jar) @ enterpriseMyHadoop ---
[INFO] Building jar: D:CodeMyEclipseJavaCodeenterpriseMyHadoop argetenterpr
iseMyHadoop-1.0-SNAPSHOT.jar
[INFO]
[INFO] --- maven-shade-plugin:2.4.1:shade (default) @ enterpriseMyHadoop ---
[INFO] Including org.apache.hadoop:hadoop-common:jar:2.6.0 in the shaded jar.
[INFO] Including org.apache.hadoop:hadoop-annotations:jar:2.6.0 in the shaded ja
r.
[INFO] Including com.google.guava:guava:jar:11.0.2 in the shaded jar.
[INFO] Including commons-cli:commons-cli:jar:1.2 in the shaded jar.
[INFO] Including org.apache.commons:commons-math3:jar:3.1.1 in the shaded jar.
[INFO] Including xmlenc:xmlenc:jar:0.52 in the shaded jar.
[INFO] Including commons-httpclient:commons-httpclient:jar:3.1 in the shaded jar
.
[INFO] Including commons-codec:commons-codec:jar:1.4 in the shaded jar.
[INFO] Including commons-io:commons-io:jar:2.4 in the shaded jar.
[INFO] Including commons-net:commons-net:jar:3.1 in the shaded jar.
[INFO] Including commons-collections:commons-collections:jar:3.2.1 in the shaded
jar.
[INFO] Including javax.servlet:servlet-api:jar:2.5 in the shaded jar.
[INFO] Including org.mortbay.jetty:jetty:jar:6.1.26 in the shaded jar.
[INFO] Including org.mortbay.jetty:jetty-util:jar:6.1.26 in the shaded jar.
[INFO] Including com.sun.jersey:jersey-core:jar:1.9 in the shaded jar.
[INFO] Including com.sun.jersey:jersey-json:jar:1.9 in the shaded jar.
[INFO] Including org.codehaus.jettison:jettison:jar:1.1 in the shaded jar.
[INFO] Including com.sun.xml.bind:jaxb-impl:jar:2.2.3-1 in the shaded jar.
[INFO] Including javax.xml.bind:jaxb-api:jar:2.2.2 in the shaded jar.
[INFO] Including javax.xml.stream:stax-api:jar:1.0-2 in the shaded jar.
[INFO] Including javax.activation:activation:jar:1.1 in the shaded jar.
[INFO] Including org.codehaus.jackson:jackson-jaxrs:jar:1.8.3 in the shaded jar.

[INFO] Including org.codehaus.jackson:jackson-xc:jar:1.8.3 in the shaded jar.
[INFO] Including com.sun.jersey:jersey-server:jar:1.9 in the shaded jar.
[INFO] Including asm:asm:jar:3.1 in the shaded jar.
[INFO] Including tomcat:jasper-compiler:jar:5.5.23 in the shaded jar.
[INFO] Including tomcat:jasper-runtime:jar:5.5.23 in the shaded jar.
[INFO] Including javax.servlet.jsp:jsp-api:jar:2.1 in the shaded jar.
[INFO] Including commons-el:commons-el:jar:1.0 in the shaded jar.
[INFO] Including commons-logging:commons-logging:jar:1.1.3 in the shaded jar.
[INFO] Including log4j:log4j:jar:1.2.17 in the shaded jar.
[INFO] Including net.java.dev.jets3t:jets3t:jar:0.9.0 in the shaded jar.
[INFO] Including org.apache.httpcomponents:httpclient:jar:4.1.2 in the shaded ja
r.
[INFO] Including org.apache.httpcomponents:httpcore:jar:4.1.2 in the shaded jar.

[INFO] Including com.jamesmurty.utils:java-xmlbuilder:jar:0.4 in the shaded jar.

[INFO] Including commons-lang:commons-lang:jar:2.6 in the shaded jar.
[INFO] Including commons-configuration:commons-configuration:jar:1.6 in the shad
ed jar.
[INFO] Including commons-digester:commons-digester:jar:1.8 in the shaded jar.
[INFO] Including commons-beanutils:commons-beanutils:jar:1.7.0 in the shaded jar
.
[INFO] Including commons-beanutils:commons-beanutils-core:jar:1.8.0 in the shade
d jar.
[INFO] Including org.slf4j:slf4j-api:jar:1.7.5 in the shaded jar.
[INFO] Including org.slf4j:slf4j-log4j12:jar:1.7.5 in the shaded jar.
[INFO] Including org.codehaus.jackson:jackson-core-asl:jar:1.9.13 in the shaded
jar.
[INFO] Including org.codehaus.jackson:jackson-mapper-asl:jar:1.9.13 in the shade
d jar.
[INFO] Including org.apache.avro:avro:jar:1.7.4 in the shaded jar.
[INFO] Including com.thoughtworks.paranamer:paranamer:jar:2.3 in the shaded jar.

[INFO] Including org.xerial.snappy:snappy-java:jar:1.0.4.1 in the shaded jar.
[INFO] Including com.google.protobuf:protobuf-java:jar:2.5.0 in the shaded jar.
[INFO] Including com.google.code.gson:gson:jar:2.2.4 in the shaded jar.
[INFO] Including org.apache.hadoop:hadoop-auth:jar:2.6.0 in the shaded jar.
[INFO] Including org.apache.directory.server:apacheds-kerberos-codec:jar:2.0.0-M
15 in the shaded jar.
[INFO] Including org.apache.directory.server:apacheds-i18n:jar:2.0.0-M15 in the
shaded jar.
[INFO] Including org.apache.directory.api:api-asn1-api:jar:1.0.0-M20 in the shad
ed jar.
[INFO] Including org.apache.directory.api:api-util:jar:1.0.0-M20 in the shaded j
ar.
[INFO] Including org.apache.curator:curator-framework:jar:2.6.0 in the shaded ja
r.
[INFO] Including com.jcraft:jsch:jar:0.1.42 in the shaded jar.
[INFO] Including org.apache.curator:curator-client:jar:2.6.0 in the shaded jar.
[INFO] Including org.apache.curator:curator-recipes:jar:2.6.0 in the shaded jar.

[INFO] Including com.google.code.findbugs:jsr305:jar:1.3.9 in the shaded jar.
[INFO] Including org.htrace:htrace-core:jar:3.0.4 in the shaded jar.
[INFO] Including org.apache.zookeeper:zookeeper:jar:3.4.6 in the shaded jar.
[INFO] Including org.apache.commons:commons-compress:jar:1.4.1 in the shaded jar
.
[INFO] Including org.tukaani:xz:jar:1.0 in the shaded jar.
[INFO] Including org.apache.hadoop:hadoop-hdfs:jar:2.6.0 in the shaded jar.
[INFO] Including commons-daemon:commons-daemon:jar:1.0.13 in the shaded jar.
[INFO] Including io.netty:netty:jar:3.6.2.Final in the shaded jar.
[INFO] Including xerces:xercesImpl:jar:2.9.1 in the shaded jar.
[INFO] Including xml-apis:xml-apis:jar:1.3.04 in the shaded jar.
[INFO] Including org.apache.hadoop:hadoop-client:jar:2.6.0 in the shaded jar.
[INFO] Including org.apache.hadoop:hadoop-mapreduce-client-app:jar:2.6.0 in the
shaded jar.
[INFO] Including org.apache.hadoop:hadoop-mapreduce-client-common:jar:2.6.0 in t
he shaded jar.
[INFO] Including org.apache.hadoop:hadoop-yarn-client:jar:2.6.0 in the shaded ja
r.
[INFO] Including org.apache.hadoop:hadoop-yarn-server-common:jar:2.6.0 in the sh
aded jar.
[INFO] Including org.apache.hadoop:hadoop-mapreduce-client-shuffle:jar:2.6.0 in
the shaded jar.
[INFO] Including org.fusesource.leveldbjni:leveldbjni-all:jar:1.8 in the shaded
jar.
[INFO] Including org.apache.hadoop:hadoop-yarn-api:jar:2.6.0 in the shaded jar.
[INFO] Including org.apache.hadoop:hadoop-mapreduce-client-core:jar:2.6.0 in the
shaded jar.
[INFO] Including org.apache.hadoop:hadoop-yarn-common:jar:2.6.0 in the shaded ja
r.
[INFO] Including com.sun.jersey:jersey-client:jar:1.9 in the shaded jar.
[INFO] Including org.apache.hadoop:hadoop-mapreduce-client-jobclient:jar:2.6.0 i
n the shaded jar.
[WARNING] hadoop-yarn-common-2.6.0.jar, hadoop-yarn-client-2.6.0.jar define 2 ov
erlapping classes:
[WARNING] - org.apache.hadoop.yarn.client.api.impl.package-info
[WARNING] - org.apache.hadoop.yarn.client.api.package-info
[WARNING] jasper-compiler-5.5.23.jar, jasper-runtime-5.5.23.jar define 1 overlap
ping classes:
[WARNING] - org.apache.jasper.compiler.Localizer
[WARNING] commons-beanutils-core-1.8.0.jar, commons-beanutils-1.7.0.jar, commons
-collections-3.2.1.jar define 10 overlapping classes:
[WARNING] - org.apache.commons.collections.FastHashMap$EntrySet
[WARNING] - org.apache.commons.collections.ArrayStack
[WARNING] - org.apache.commons.collections.FastHashMap$1
[WARNING] - org.apache.commons.collections.FastHashMap$KeySet
[WARNING] - org.apache.commons.collections.FastHashMap$CollectionView
[WARNING] - org.apache.commons.collections.BufferUnderflowException
[WARNING] - org.apache.commons.collections.Buffer
[WARNING] - org.apache.commons.collections.FastHashMap$CollectionView$Collecti
onViewIterator
[WARNING] - org.apache.commons.collections.FastHashMap$Values
[WARNING] - org.apache.commons.collections.FastHashMap
[WARNING] hadoop-yarn-common-2.6.0.jar, hadoop-yarn-api-2.6.0.jar define 3 overl
apping classes:
[WARNING] - org.apache.hadoop.yarn.factories.package-info
[WARNING] - org.apache.hadoop.yarn.util.package-info
[WARNING] - org.apache.hadoop.yarn.factory.providers.package-info
[WARNING] commons-beanutils-core-1.8.0.jar, commons-beanutils-1.7.0.jar define 8
2 overlapping classes:
[WARNING] - org.apache.commons.beanutils.WrapDynaBean
[WARNING] - org.apache.commons.beanutils.Converter
[WARNING] - org.apache.commons.beanutils.converters.IntegerConverter
[WARNING] - org.apache.commons.beanutils.locale.LocaleBeanUtilsBean
[WARNING] - org.apache.commons.beanutils.locale.converters.DecimalLocaleConver
ter
[WARNING] - org.apache.commons.beanutils.locale.converters.DoubleLocaleConvert
er
[WARNING] - org.apache.commons.beanutils.converters.ShortConverter
[WARNING] - org.apache.commons.beanutils.converters.StringArrayConverter
[WARNING] - org.apache.commons.beanutils.locale.LocaleConvertUtilsBean
[WARNING] - org.apache.commons.beanutils.LazyDynaClass
[WARNING] - 72 more...
[WARNING] maven-shade-plugin has detected that some class files are
[WARNING] present in two or more JARs. When this happens, only one
[WARNING] single version of the class is copied to the uber jar.
[WARNING] Usually this is not harmful and you can skip these warnings,
[WARNING] otherwise try to manually exclude artifacts based on
[WARNING] mvn dependency:tree -Ddetail=true and the above output.
[WARNING] See http://docs.codehaus.org/display/MAVENUSER/Shade+Plugin
[INFO] Replacing original artifact with shaded artifact.
[INFO] Replacing D:CodeMyEclipseJavaCodeenterpriseMyHadoop argetenterpriseM
yHadoop-1.0-SNAPSHOT.jar with D:CodeMyEclipseJavaCodeenterpriseMyHadoop arge
tenterpriseMyHadoop-1.0-SNAPSHOT-shaded.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 01:17 min
[INFO] Finished at: 2017-03-10T16:55:33+08:00
[INFO] Final Memory: 40M/224M
[INFO] ------------------------------------------------------------------------

D:CodeMyEclipseJavaCodeenterpriseMyHadoop>

　　之前是空的，没有

输入打包命令mvn package，变成如下，刷新一下MyEclipse的target目录

 

　　成功！

　　最后将jar包，传到hdoop或spark集群里，这里我不多赘述。