import org.springframework.shell.plugin.PromptProvider; //导入依赖的package包/类
/**
 * get prompt text from provider. The provider has highest order 
 * <link>org.springframework.core.Ordered.getOder</link> will win. 
 * 
 * @return prompt text
 */
protected String getPromptText() {
  PromptProvider promptProvider = PluginUtils
    .getHighestPriorityProvider(this.applicationContext, PromptProvider.class);
  String providerPromptText = promptProvider.getPrompt();
  if (providerPromptText != null) {
    return providerPromptText;
  } else {
    return promptText;
  }
}