策略模式+工厂模式-解决if else

public interface strategy extends InitializingBean{

void handler(JsonObject z2CmdReq);

}

public class CtrlInnerPolicyStrategy implements strategy{

@Override

public void handler(JsonObject z2CmdReq){

//TODO

}

@Override

public void afterPropertiesSet(){

CmdStrategyFactory.register(CmdTypeConstant.CTRL_INNER_POLICY,this);

}

}

@Component

public class CmdStrategyFactory{

private static Map<String,Strategy> map = new HashMap<>();

public static Strategy getSpecStrategy(String cmd){

return map.get(cmd);

}

public static void register(String cmd,Strategy handler){

if(StringUtils.isEmpty() &&null == handler){

return;

}

map.put(cmd,handler);

}

}

使用：

CmdStrategyFactory.getSpecStrategy(z2CmdReq.getCmdType()).handler(JsonObject z2CmdReq);