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1. SpringBoot工程
2. 參數解析
3. HTTP Method
4. Request / Response / Session
5. Error/重定向
6. Logger
7. IoC
8. AOP/Aspect

1：SpringBoot工程 框架學習，首先接觸看官方文檔：（先看做什麽，官方的文檔細節先忽略，用到去查找） start.spring.io //controller演示 public class IndexController { @RequestMapping(path = {"/","/index"

}) @ResponseBody public String Index( ) { return " name "; } } 2：參數解析 //controller攜帶參數的演示,路徑裏面的參數可以解析到函數裏面 @RequestMapping(value = "/profile/{groupId}/{userId}") @ResponseBody public String profile(@PathVariable("groupId") String groupId, @PathVariable("userId") int userId, @RequestParam

(value = "type", defaultValue = "1") int type, @RequestParam(value = "key", defaultValue = "nowcoder") String key) { return String.format("{%s},{%d},{%d},{%s}", groupId, userId, type, key); } //設置 type = //設置 key = //controller攜帶參數，並且攜帶@requestparam @RequestMapping(value = "/profile/{groupId}/{userId}"

) @ResponseBody public String profile(@PathVariable("groupId") String groupId, @PathVariable("userId") int userId, @RequestParam(value = "type", defaultValue = "1") int type, @RequestParam(value = "key", defaultValue = "nowcoder") String key) { return String.format("{%s},{%d},{%d},{%s}", groupId, userId, type, key); } 3：HTTP Method HTTP Method（代碼演示） GET 獲取接口信息 HEAD 緊急查看接口HTTP的頭 POST 提交數據到服務器 PUT 支持冪等性的POST //執行兩次是一樣的結果； DELETE 刪除服務器上的資源 OPITIONS 查看支持的方法 可以設置get post Fidder web debugger工具 4：Request / Response / Session request HttpServletResponse 參數解析 response.addCookie(new Cookie(key, value)); response.addHeader(key, value); cookie讀取 http請求字段 文件上傳 HttpServletRequest request.getHeaderNames(); request.getMethod() request.getPathInfo() request.getQueryString() response 頁面內容返回 cookie下發 http字段設置，headers 5：Error/重定向 //重定向 //301：永久轉移 //302：臨時轉移 //異常的統一處理 @RequestMapping(path = {"/admin"}, method = {RequestMethod.GET}) @ResponseBody public String admin(@RequestParam("key") String key) { if ("admin".equals( key )) { return "hello admin"; } throw new IllegalArgumentException( "參數不對" ); } @ExceptionHandler() @ResponseBody public String error(Exception e) { return "出現了錯誤error:" + e.getMessage(); }
6：IoC 控制反轉：無需關註對象的初始化（享元模式） servicecs包下面：通過標記@Services來設置對象， controller包下面：通過@Autowired，直接引入對象無需初始化。不需要new Services中的對象； 7：AOP/Aspect 面向切面 @Aspect @Component public class LogAspect { private static final Logger logger = LoggerFactory.getLogger(LogAspect.class); @Before("execution(* com.nowcoder.controller.*Controller.*(..))") public void beforeMethod(JoinPoint joinPoint) { StringBuilder sb = new StringBuilder(); for (Object arg : joinPoint.getArgs()) { sb.append("arg:" + arg.toString() + "|"); }//切點打印參數 logger.info("before method:" + sb.toString()); } @After("execution(* com.nowcoder.controller.IndexController.*(..))") public void afterMethod() { logger.info("after method" + new Date()); } }

Spring Boot 基礎框架以及特性