Method main8

ch2/RequestParamTest.java:75–81

(@RequestParam(required=false) int year)

	}

	@RequestMapping("/requestParam8") 
	public String main8(@RequestParam(required=false) int year) {   
	//	http://localhost/ch2/requestParam8        ---->> 500 java.lang.IllegalStateException: Optional int parameter 'year' is present but cannot be translated into a null value due to being declared as a primitive type. Consider declaring it as object wrapper for the corresponding primitive type.
	//	http://localhost/ch2/requestParam8?year   ---->> 400 Bad Request, nested exception is java.lang.NumberFormatException: For input string: "" 
		System.out.printf("[%s]year=[%s]%n", new Date(), year);
		return "yoil";
	}
	
	@RequestMapping("/requestParam9") 
	public String main9(@RequestParam(required=true) int year) {