浅谈Java设计模式之开放封闭原则

public ResultDO shareChannel(int shareCode) {

  if(ShareCodeUtil.share2A(shareCode)) {
     // TODO, 分享到A渠道的业务逻辑代码
  }

  if(ShareCodeUtil.share2B(shareCode)) {
     // TODO, 分享到B渠道的业务逻辑代码
  }

  ...渠道n...
}

public class ShareChannelChain {  
  private final Logger LOG = LoggerFactory.getLogger(this.getClass());

  /**
   * 分享渠道链
   */
  private List shareChannels;
  public ResultDO share(int shareCode) {
    for (ShareChannel s : shareChannels) {
      ResultDO r = s.share(shareCode);
         }
  }

public interface ShareChannel {
  public ResultDO share(int shareCod);
}

public class AChannel implements ShareChannel {

  @Override
  public ResultDO share(int shareCode) {
       // TODO 分享A渠道逻辑
    }
}

public class BChannel implements ShareChannel {

  @Override
  public ResultDO share(int shareCode) {
       // TODO 分享B渠道逻辑
    }
}

public ResultDO shareChannel(int shareCode) {
    ShareChannelChain.share(shareCode);
}