spring boot 中默认最大线程连接数，线程池数配置查看

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　　可以查看 AbstractEndpoint  源码中的常量的定义：

public abstract class AbstractEndpoint<S, U> {
    protected static final StringManager sm = StringManager.getManager(AbstractEndpoint.class);
    protected volatile boolean running = false;
    protected volatile boolean paused = false;
    protected volatile boolean internalExecutor = true;
    private volatile LimitLatch connectionLimitLatch = null;
    protected final SocketProperties socketProperties = new SocketProperties();
    protected Acceptor<U> acceptor;
    protected SynchronizedStack<SocketProcessorBase<S>> processorCache;
    private ObjectName oname = null;
    protected Map<U, SocketWrapperBase<S>> connections = new ConcurrentHashMap();
    private String defaultSSLHostConfigName = "_default_";
    protected ConcurrentMap<String, SSLHostConfig> sslHostConfigs = new ConcurrentHashMap();
    private boolean useSendfile = true;
    private long executorTerminationTimeoutMillis = 5000L;
    protected int acceptorThreadCount = 1;
    protected int acceptorThreadPriority = 5;
    private int maxConnections = 8192;
    private Executor executor = null;
    private ScheduledExecutorService utilityExecutor = null;
    private int port = -1;
    private int portOffset = 0;
    private InetAddress address;
    private int acceptCount = 100;
    private boolean bindOnInit = true;
    private volatile AbstractEndpoint.BindState bindState;
    private Integer keepAliveTimeout;
    private boolean SSLEnabled;
    private int minSpareThreads;
    private int maxThreads;
    protected int threadPriority;
    private int maxKeepAliveRequests;
    private String name;
    private String domain;
    private boolean daemon;
    private boolean useAsyncIO;
    protected final List<String> negotiableProtocols;
    private AbstractEndpoint.Handler<S> handler;
    protected HashMap<String, Object> attributes;

    public AbstractEndpoint() {
        this.bindState = AbstractEndpoint.BindState.UNBOUND;
        this.keepAliveTimeout = null;
        this.SSLEnabled = false;
        this.minSpareThreads = 10;
        this.maxThreads = 200;
        this.threadPriority = 5;
        this.maxKeepAliveRequests = 100;
        this.name = "TP";
        this.daemon = true;
        this.useAsyncIO = true;
        this.negotiableProtocols = new ArrayList();
        this.handler = null;
        this.attributes = new HashMap();
    }