refactor: remove apache.commons.io runtime dependency of DcmTool

Author: oldratlee

library/src/test/java/com/alibaba/demo/SocketDemo.java

@@ -3,23 +3,22 @@
 import org.apache.commons.io.IOUtils;
 
 import java.net.Socket;
-import java.nio.charset.Charset;
-import java.nio.charset.StandardCharsets;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
 
 /**
  * @author Jerry Lee (oldratlee at gmail dot com)
  */
 public class SocketDemo {
-    private static final Charset encoding = StandardCharsets.UTF_8;
 
     public static void main(String[] args) throws Exception {
         Socket client = new Socket("www.bing.com", 80);
 
         client.setSoTimeout(30 * 1000);
 
-        IOUtils.write("Hello world!", client.getOutputStream(), encoding);
+        IOUtils.write("Hello world!", client.getOutputStream(), UTF_8);
 
-        final String input = IOUtils.toString(client.getInputStream(),encoding);
+        final String input = IOUtils.toString(client.getInputStream(), UTF_8);
         System.out.println(input);
         System.out.println("bye!");
 

tool/pom.xml

@@ -65,17 +65,18 @@
 			<groupId>commons-cli</groupId>
 			<artifactId>commons-cli</artifactId>
 		</dependency>
-		<dependency>
-			<groupId>commons-io</groupId>
-			<artifactId>commons-io</artifactId>
-		</dependency>
 
 		<!-- Testing libs -->
 		<dependency>
 			<groupId>org.apache.commons</groupId>
 			<artifactId>commons-lang3</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>commons-io</groupId>
+			<artifactId>commons-io</artifactId>
+			<scope>test</scope>
+		</dependency>
 		<!-- https://www.baeldung.com/java-comparing-versions -->
 		<dependency>
 			<groupId>org.apache.maven</groupId>

tool/src/main/java/com/alibaba/dcm/tool/DcmTool.java

@@ -4,12 +4,12 @@
 import com.sun.tools.attach.*;
 import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
 import org.apache.commons.cli.*;
-import org.apache.commons.io.FileUtils;
 
 import javax.annotation.Nonnull;
-import java.io.File;
 import java.io.IOException;
 import java.lang.management.ManagementFactory;
+import java.nio.file.Files;
+import java.nio.file.Paths;
 import java.util.List;
 import java.util.Scanner;
 
@@ -109,7 +109,7 @@ private static void doDcmActionViaAgent(@Nonnull String action, @Nonnull String[
     private static boolean printDcmResult(@Nonnull String tmpFile) throws IOException {
         boolean actionSuccess = false;
 
-        final List<String> lines = FileUtils.readLines(new File(tmpFile), UTF_8);
+        final List<String> lines = Files.readAllLines(Paths.get(tmpFile), UTF_8);
 
         final int lastIdx = lines.size() - 1;
         final String lastLine = lines.get(lastIdx);