Exception和IOException之间的使用区别

 1 public void await() {
 2     // 创建ServerSocket对象
 3     InetAddress add = null;
 4     ServerSocket ss = null;
 5     try {
 6         add = InetAddress.getByName(LOCAL);
 7         ss = new ServerSocket(port, blocklog, add);
 8     } catch (IOException e) {
 9         e.printStackTrace();
10     }
11     // 如果URI是/SHUTDOWN说明需要关闭服务器
12     Socket s = null;
13     InputStream in = null;
14     OutputStream out = null;
15     // 进入循环,知道响应完成
16     while (!shutdown) {
17         try {
18             //接收socket并创建流
19             s = ss.accept();//只会在8080端口接收到一个HTTP请求的时候才返回
20             in = s.getInputStream();
21             out = s.getOutputStream();
22             // 创建Request对象并parse,获取资源uri
23             Request request = new Request(in);
24             request.parse();
25             // 创建Response对象并执行操作
26             Response response = new Response(out);
27             // 传入Request对象,根据getUri()获取uri地址并进行加载
28             response.setReqest(request);
29             response.sendStaticResource();
30             // 关闭socket,同时输入流和输出流自动关闭
31             s.close();
32             // 检查返回的URI是否是服务器关闭命令
33             shutdown = request.getUri().equals(SHUTDOWN_COMMAND);
34         } catch (Exception e) {
35             e.printStackTrace();
36             //出现异常就继续重新接收
37             continue;
38         }
39     }  
40 }