Tale: 端口改成80，启动服务报错

我在resources/app.properties添加一行server.port=80，启动服务器报错
io.netty.channel.AbstractChannelHandlerContext.invokeBind(AbstractChannelHandlerContext.java:501) at io.netty.channel.AbstractChannelHandlerContext.bind(AbstractChannelHandlerContext.java:486) at io.netty.channel.DefaultChannelPipeline.bind(DefaultChannelPipeline.java:989) at io.netty.channel.AbstractChannel.bind(AbstractChannel.java:254) at io.netty.bootstrap.AbstractBootstrap$2.run(AbstractBootstrap.java:364) at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163) at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:403) at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:463) at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) at java.lang.Thread.run(Thread.java:748)