java读写注册表

用java的Preferences有很大限制，最好是下载jRegistryKey,解压出jRegistryKey.jar和jRegistryKey.dll引入项目中

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import java.util.Iterator;   import ca.beq.util.win32.registry.RegistryKey; import ca.beq.util.win32.registry.RegistryValue; import ca.beq.util.win32.registry.RootKey; import ca.beq.util.win32.registry.ValueType;   public class CaRegTest1 {       public static void main(String[] args) {                   //列出HKEY_CURRENT_USER的子键         RegistryKey current_user = new RegistryKey(RootKey.HKEY_CURRENT_USER);         if(current_user.hasSubkeys()){             Iterator<RegistryKey> keys = current_user.subkeys();             while(keys.hasNext()) {                 RegistryKey k = keys.next();                 System.out.println(k.getName());             }         }                   //列出 HKEY_CURRENT_USER/Environment 的所有键值的名称、类型和数据         RegistryKey env = new RegistryKey(RootKey.HKEY_CURRENT_USER,"Environment");             if(env.hasValues()) {             Iterator<RegistryValue> values = env.values();             while(values.hasNext()) {                 RegistryValue v = values.next();                 System.out.println(v.getName()+"\t"+v.getType());                 System.out.println("\t"+v.getData());             }         }                   //写入注册表         RegistryKey newKey = new RegistryKey(RootKey.HKEY_CURRENT_USER,"Environment\\NewKey");         newKey.create();//创建新的键HKEY_CURRENT_USER/Environment/NewKey         RegistryValue value = new RegistryValue("My Paht",ValueType.REG_SZ,"hahah\\lalal");         newKey.setValue(value);//在新创建的键里写入键值,在注册表中按F5刷新一下能看到变化了吧     }   }