Get command-line charset.

https://learn.microsoft.com/en-us/windows/win32/intl/code-page-bitfields

Author: lhDream

src/main/java/io/github/fvarrui/javapackager/utils/CharSetUtil.java

@@ -0,0 +1,34 @@
+package io.github.fvarrui.javapackager.utils;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.nio.charset.Charset;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class CharSetUtil {
+
+    public static Charset getCommandLineChartSet(){
+        try{
+            Process p = Runtime.getRuntime().exec("cmd /k chcp");
+            BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
+            String res = br.readLine();
+            String code = find("\\d+",res);
+            switch (code){
+                case "936": return Charset.forName("GBK");
+                case "65001": return Charset.forName("UTF-8");
+            }
+        }catch (Exception e){
+            return Charset.defaultCharset();
+        }
+        return Charset.forName("UTF-8");
+    }
+
+    private static String find(String pattern,String data){
+        Pattern r = Pattern.compile(pattern);
+        Matcher matcher = r.matcher(data);
+        matcher.find();
+        return matcher.group();
+    }
+
+}

src/main/java/io/github/fvarrui/javapackager/utils/CommandUtils.java

@@ -1,7 +1,6 @@
 package io.github.fvarrui.javapackager.utils;
 
 import java.io.*;
-import java.nio.charset.Charset;
 
 import org.apache.commons.lang3.StringUtils;
 import org.codehaus.plexus.util.cli.CommandLineException;
@@ -45,7 +44,7 @@ public static ExecutionResult executeWithResult(File workingDirectory, String ex
 
 		Process process = command.execute();
 
-		BufferedReader output = new BufferedReader(new InputStreamReader(process.getInputStream(), Charset.forName("GBK")));
+		BufferedReader output = new BufferedReader(new InputStreamReader(process.getInputStream(), CharSetUtil.getCommandLineChartSet()));
 		BufferedReader error = new BufferedReader(new InputStreamReader(process.getErrorStream()));
 		while (process.isAlive() || output.ready() || error.ready()) {
 			if (output.ready()) {