content: package com.cf.forward.dh.lib;
  
  import com.sun.jna.IntegerType;
  import com.sun.jna.Native;
  import com.sun.jna.Platform;
  import com.sun.jna.Structure;
  
  import java.lang.reflect.Field;
  import java.lang.reflect.Modifier;
  import java.text.SimpleDateFormat;
  import java.util.ArrayList;
  import java.util.List;
  
  public class Utils {
      public Utils() {
  
      }
  
      /**
       * 获取系统对应的编码
       *
       */
      public static String getPlatformEncode() {
          String encode = "";
          String osPrefix = getOsPrefix();
          if (osPrefix.toLowerCase().startsWith("win32")) {
              encode = "GBK";
          } else if (osPrefix.toLowerCase().startsWith("linux")) {
              encode = "UTF-8";
          }else if(osPrefix.toLowerCase().startsWith("mac")){
              encode="UTF-8";
          }
          if(encode.isEmpty()){
              encode="UTF-8";
          }
          return encode;
      }
  
      // 获取操作平台信息
      public static String getOsPrefix() {
          String arch = System.getProperty("os.arch").toLowerCase();
          final String name = System.getProperty("os.name");
          String osPrefix;
          switch (Platform.getOSType()) {
              case Platform.WINDOWS: {
                  if ("i386".equals(arch))
                      arch = "x86";
                  osPrefix = "win32-" + arch;
              }
              break;
              case Platform.LINUX: {
                  if ("x86".equals(arch)) {
                      arch = "i386";
                  } else if ("x86_64".equals(arch)) {
                      arch = "amd64";
                  }
                  osPrefix = "linux-" + arch;
              }
              break;
              case Platform.MAC: {
                  //mac系统的os.arch都是ppc(老版本的mac是powerpc，已经基本不用)看不出系统位数，使用下面的参数表示
                  arch = System.getProperty("sun.arch.data.model");
                  osPrefix = "mac-" + arch;
              }
              break;
              default: {
                  osPrefix = name.toLowerCase();
                  if ("x86".equals(arch)) {
                      arch = "i386";
                  }
                  if ("x86_64".equals(arch)) {
                      arch = "amd64";
                  }
                  int space = osPrefix.indexOf(" ");
                  if (space != -1) {
                      osPrefix = osPrefix.substring(0, space);
                  }
                  osPrefix += "-" + arch;
              }
              break;
  
          }
  
          return osPrefix;
      }
  
      public static String getOsName() {
          String osName = "";
          String osPrefix = getOsPrefix();
          if (osPrefix.toLowerCase().startsWith("win32-x86")
                  || osPrefix.toLowerCase().startsWith("win32-amd64")) {
              osName = "win";
          } else if (osPrefix.toLowerCase().startsWith("linux-i386")
                  || osPrefix.toLowerCase().startsWith("linux-amd64")) {
              osName = "linux";
          } else if (osPrefix.toLowerCase().startsWith("mac-64")
                  || osPrefix.toLowerCase().startsWith("mac-32")) {
              osName = "mac";
          }
  
          return osName;
      }
  
      // 获取加载库
      public static String getLoadLibrary(String library) {
          if (isChecking()) {
              return null;
          }
  
          String loadLibrary = "";
          String osPrefix = getOsPrefix();
          if (osPrefix.toLowerCase().startsWith("win32-x86")) {
              loadLibrary = "./libs/win32/";
          } else if (osPrefix.toLowerCase().startsWith("win32-amd64")) {
              loadLibrary = "./libs/win64/";
          } else if (osPrefix.toLowerCase().startsWith("linux-i386")) {
              loadLibrary = "";
          } else if (osPrefix.toLowerCase().startsWith("linux-amd64")) {
              loadLibrary = "";
          } else if (osPrefix.toLowerCase().startsWith("mac-64")) {
              loadLibrary = "";
          }
  //		else if(osPrefix.toLowerCase().startsWith("mac-32")) {
  //			loadLibrary = "";
  //		}  32位mac版本基本没人用了，暂时不用
  
          System.out.printf("加载库[%s]\n", loadLibrary + library);
          return loadLibrary + library;
      }
  
      private static boolean checking = false;
  
      public static void setChecking() {
          checking = true;
      }
  
      public static void clearChecking() {
          checking = false;
      }
  
      public static boolean isChecking() {
          return checking;
      }
  
      public static class LLong extends IntegerType {
          private static final long serialVersionUID = 1L;
  
          /**
           * Size of a native long, in bytes.
           */
          public static int size;
  
          static {
              size = Native.LONG_SIZE;
              if (Utils.getOsPrefix().toLowerCase().equals("linux-amd64")
                      || Utils.getOsPrefix().toLowerCase().equals("win32-amd64")
                      || Utils.getOsPrefix().toLowerCase().equals("mac-64")) {
                  size = 8;
              } else if (Utils.getOsPrefix().toLowerCase().equals("linux-i386")
                      || Utils.getOsPrefix().toLowerCase().equals("win32-x86")) {
                  size = 4;
              }
          }
  
          /**
           * Create a zero-valued LLong.
           */
          public LLong() {
              this(0);
          }
  
          /**
           * Create a LLong with the given value.
           */
          public LLong(long value) {
              super(size, value);
          }
      }
  
      public static class SdkStructure extends Structure {
          @Override
          protected List<String> getFieldOrder() {
              List<String> fieldOrderList = new ArrayList<String>();
              for (Class<?> cls = getClass();
                   !cls.equals(NetSDKLib.SdkStructure.class);
                   cls = cls.getSuperclass()) {
                  Field[] fields = cls.getDeclaredFields();
                  int modifiers;
                  for (Field field : fields) {
                      modifiers = field.getModifiers();
                      if (Modifier.isStatic(modifiers) || !Modifier.isPublic(modifiers)) {
                          continue;
                      }
                      fieldOrderList.add(field.getName());
                  }
              }
              //            System.out.println(fieldOrderList);
  
              return fieldOrderList;
          }
      }
  
      // 获取当前时间
      public static String getDate() {
          SimpleDateFormat simpleDate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
          return simpleDate.format(new java.util.Date())
                  .replace(" ", "_").replace(":", "-");
      }
  
  }
  