[ci] Use jdk 11 style charset

Author: hazendaz

src/main/java/org/apache/ibatis/io/DefaultVFS.java

@@ -21,7 +21,6 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
-import java.io.UnsupportedEncodingException;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.net.URLEncoder;
@@ -278,11 +277,7 @@ protected URL findJarForResource(URL url) throws MalformedURLException {
 
       // File name might be URL-encoded
       if (!file.exists()) {
-        try {
-          file = new File(URLEncoder.encode(jarUrl.toString(), StandardCharsets.UTF_8.name()));
-        } catch (UnsupportedEncodingException e) {
-          throw new RuntimeException("Unsupported encoding?  UTF-8?  That's impossible.");
-        }
+        file = new File(URLEncoder.encode(jarUrl.toString(), StandardCharsets.UTF_8));
       }
 
       if (file.exists()) {