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！

第一步：

第二步：

第三步：

第四步：

第五步：

第六步：

第七步：默认的

 1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 2   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 3   <modelVersion>4.0.0</modelVersion>
 4 
 5   <groupId>zhouls.bigdata</groupId>
 6   <artifactId>enterpriseMyHadoop</artifactId>
 7   <version>0.0.1-SNAPSHOT</version>
 8   <packaging>jar</packaging>
 9 
10   <name>enterpriseMyHadoop</name>
11   <url>http://maven.apache.org</url>
12 
13   <properties>
14     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
15   </properties>
16 
17   <dependencies>
18     <dependency>
19       <groupId>junit</groupId>
20       <artifactId>junit</artifactId>
21       <version>3.8.1</version>
22       <scope>test</scope>
23     </dependency>
24   </dependencies>
25 </project>

第八步：修改得到

 1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 2          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 3     <modelVersion>4.0.0</modelVersion>
 4 
 5     <groupId>zhouls.bigdata.enterpriseMyHadoop</groupId>
 6     <artifactId>enterpriseMyHadoop</artifactId>
 7     <version>1.0-SNAPSHOT</version>
 8     <packaging>jar</packaging>
 9 
10     <name>test</name>
11     <url>http://maven.apache.org</url>
12 
13     <properties>
14         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
15         <hadoop.version>2.6.0</hadoop.version>
16     </properties>
17 
18     <dependencies>
19         <dependency>
20             <groupId>junit</groupId>
21             <artifactId>junit</artifactId>
22             <version>3.8.1</version>
23             <scope>test</scope>
24         </dependency>
25         <dependency>
26             <groupId>org.apache.hadoop</groupId>
27             <artifactId>hadoop-common</artifactId>
28             <version>${hadoop.version}</version>
29         </dependency>
30         <dependency>
31             <groupId>org.apache.hadoop</groupId>
32             <artifactId>hadoop-hdfs</artifactId>
33             <version>${hadoop.version}</version>
34         </dependency>
35         <dependency>
36             <groupId>org.apache.hadoop</groupId>
37             <artifactId>hadoop-client</artifactId>
38             <version>${hadoop.version}</version>
39         </dependency>
40     </dependencies>
41     <build>
42         <plugins>
43             <plugin>
44                 <groupId>org.apache.maven.plugins</groupId>
45                 <artifactId>maven-shade-plugin</artifactId>
46                 <version>2.4.1</version>
47                 <executions>
48                     <!-- Run shade goal on package phase -->
49                     <execution>
50                         <phase>package</phase>
51                         <goals>
52                             <goal>shade</goal>
53                         </goals>
54                         <configuration>
55                             <transformers>
56                                 <!-- add Main-Class to manifest file -->
57                                 <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
58                                     <mainClass>zhouls.bigdata.enterpriseMyHadoop.MyDriver</mainClass>
59                                 </transformer>
60                             </transformers>
61                             <createDependencyReducedPom>false</createDependencyReducedPom>
62                         </configuration>
63                     </execution>
64                 </executions>
65             </plugin>
66         </plugins>
67     </build>
68 </project>
69

第九步：写代码

WordCount.java

  1 package zhouls.bigdata.enterpriseMyHadoop;
  2 
  3 import java.io.IOException;
  4 import java.util.StringTokenizer;
  5 
  6 import org.apache.hadoop.conf.Configuration;
  7 import org.apache.hadoop.conf.Configured;
  8 import org.apache.hadoop.fs.FileSystem;
  9 import org.apache.hadoop.fs.Path;
 10 import org.apache.hadoop.io.IntWritable;
 11 import org.apache.hadoop.io.Text;
 12 import org.apache.hadoop.mapreduce.Job;
 13 import org.apache.hadoop.mapreduce.Mapper;
 14 import org.apache.hadoop.mapreduce.Reducer;
 15 import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
 16 import org.apache.hadoop.mapreduce.lib.input.TextInputFormat;
 17 import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
 18 import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;
 19 import org.apache.hadoop.util.Tool;
 20 @SuppressWarnings("unused")// 屏蔽java编译中的一些警告信息
 21 public class WordCount extends Configured implements Tool{
 22 
 23     public static class TokenizerMapper extends
 24             Mapper<Object, Text, Text, IntWritable>
 25             //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。
 26             //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
 27             {
 28             //定义两个变量
 29         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.
 30         private Text word = new Text();
 31         
 32         public void map(Object key, Text value, Context context)
 33         //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
 34         //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
 35         //我们这里最直观的就是主要用到context的write方法。
 36                 throws IOException, InterruptedException {
 37             //The tokenizer uses the default delimiter set, which is " 	

": the space character, the tab character, the newline character, the carriage-return character
 38             StringTokenizer itr = new StringTokenizer(value.toString());//将Text类型的value转化成字符串类型
 39             //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。
 40             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。
 41                     //java.util.StringTokenizer.hasMoreTokens()
 42                 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。
 43                 context.write(word, one);
 44             }
 45         }
 46     }
 47 
 48     public static class IntSumReducer extends
 49             Reducer<Text, IntWritable, Text, IntWritable> {
 50         private IntWritable result = new IntWritable();
 51         public void reduce(Text key, Iterable<IntWritable> values,
 52                 Context context) throws IOException, InterruptedException {
 53             int sum = 0;
 54             for (IntWritable val : values) {
 55                 sum += val.get();
 56             }
 57             result.set(sum);
 58             context.write(key, result);
 59         }
 60     }
 61 
 62     public static void main(String[] args) throws Exception {
 63         Configuration conf = new Configuration();
 64         //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。
 65         //删除已经存在的输出目录
 66         Path mypath = new Path("hdfs://djt002:9000/outData/wordcount-out");//输出路径
 67         FileSystem hdfs = mypath.getFileSystem(conf);//获取文件系统
 68         //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。
 69         if (hdfs.isDirectory(mypath)) {
 70             hdfs.delete(mypath, true);
 71         }
 72         //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。
 73         Job job = Job.getInstance();// new Job(conf, "word count");
 74         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
 75         //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（）
 76         //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。
 77         
 78         job.setMapperClass(TokenizerMapper.class);
 79         //job.setReducerClass(IntSumReducer.class);
 80         job.setCombinerClass(IntSumReducer.class);
 81         
 82         job.setOutputKeyClass(Text.class);
 83         job.setOutputValueClass(IntWritable.class);
 84         //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
 85         //job.setMapOutputKeyClass(Text.class);
 86         //job.setMapOutputValueClass(IntWritable.class);
 87         //hadoop默认的是TextInputFormat和TextOutputFormat,所以说我们这里可以不用配置。
 88         //job.setInputFormatClass(TextInputFormat.class);
 89         //job.setOutputFormatClass(TextOutputFormat.class);
 90         
 91         FileInputFormat.addInputPath(job, new Path(
 92                 "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。
 93         //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。        
 94         FileOutputFormat.setOutputPath(job, new Path(
 95                 "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。
 96         //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
 97         System.exit(job.waitForCompletion(true) ? 0 : 1);
 98         //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。
 99         //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
100     }
101 
102     public int run(String[] args) throws Exception {
103         // TODO Auto-generated method stub
104         return 0;
105     }
106 }
107 
108 
109 
110 
111 //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。
112 //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.
113 //value的值为每行的内容，数据类型为Text。
114 //
115 //实际上InputFormat（）是用来生成可供Map处理的<key，value>的。
116 //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),
117 //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。
118 //生成InputSplit的方法可以通过InputFormat（）来设置。
119 //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。
120 //
121 //OutputFormat()
122 //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

 1 package zhouls.bigdata.enterpriseMyHadoop;
 2 
 3 
 4 import org.apache.hadoop.util.ProgramDriver;
 5 /*
 6  * 管理所有MapReduce 程序
 7  */
 8 public class MyDriver {
 9     public static void main(String argv[]){
10         int exitCode = -1;
11         ProgramDriver pgd = new ProgramDriver();
12         try {
13           pgd.addClass("wordcount", WordCount.class, 
14                        "A map/reduce program that counts the words in the input files.");
15    
16           exitCode = pgd.run(argv);
17         }
18         catch(Throwable e){
19           e.printStackTrace();
20         }
21         
22         System.exit(exitCode);
23     }
24 }

　　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

1 $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。

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

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）