从资源文件中提取内容信息！

import java.util.MissingResourceException;
import java.util.ResourceBundle;

public class Test {

//资源文件名
 private static String CONFIGURATION_FILENAME = "gemplanet";
//想要取得的key
private static String KEY = "FileType";

 public static void main(String[] args) {

  String value = (String)getEnvironmentVariable(KEY);
  System.out.println(value);
 }

 private static String getEnvironmentVariable(String key) {
  try {
   ResourceBundle bundle = ResourceBundle.getBundle(CONFIGURATION_FILENAME);
   return bundle.getString(key);
  } catch (MissingResourceException e) {
   return null;
  }

 }
}