java技巧-获取支持的算法和算法支持的模式

1. 获得所有支持的算法

   for (Provider provider : Security.getProviders()){
       System.out.println("Provider: " + provider.getName());
       for (Provider.Service service : provider.getServices()){
           System.out.println("  Algorithm: " + service.getAlgorithm());
       }
       System.out.println();
   }

2. 获得算法支持的模式

   for (Provider provider : Security.getProviders()) {
       System.out.println("Provider: " + provider.getName());
       for (Provider.Service service : provider.getServices()) {
           System.out.println("  Algorithm  Pattern: " + service);
       }
       System.out.println("\n");
   }