add maven jar plugin

webmagic-samples/assembly.xml

+<assembly
+	xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.0 http://maven.apache.org/xsd/assembly-1.1.2.xsd">
+	<id>jar-with-dependencies</id>
+	<formats>
+		<format>jar</format>
+	</formats>
+	<includeBaseDirectory>false</includeBaseDirectory>
+	<fileSets>
+		<fileSet>
+			<directory>${project.basedir}/target/classes</directory>
+			<outputDirectory>/</outputDirectory>
+		</fileSet>
+	</fileSets>
+	<dependencySets>
+		<dependencySet>
+			<unpack>false</unpack>
+		</dependencySet>
+	</dependencySets>
+</assembly>
\ No newline at end of file

webmagic-samples/pom.xml

@@ -33,4 +33,22 @@
         </dependency>
     </dependencies>
 
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>2.4</version>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <addClasspath>true</addClasspath>
+                            <classpathPrefix>./lib/</classpathPrefix>
+                        </manifest>
+                    </archive>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
 </project>
\ No newline at end of file