Rest in sping 3.x and servlet-优快云博客

本文详细介绍了 Spring MVC 的配置，包括 DispatcherServlet 的初始化参数和 URL 映射，以及如何通过 HiddenHttpMethodFilter 支持 PUT、DELETE 等 HTTP 方法。此外，还展示了如何使用 @RequestMapping 注解实现 GET 请求，并通过方法实现产品类型列表的查询和 JSON 化输出。

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<!-- spring mvc 配置 -->
	<servlet>
		<servlet-name>dispacther</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath*:/dispacther-servlet.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>

	</servlet>

	<servlet-mapping>
		<servlet-name>dispacther</servlet-name>
		<url-pattern>/service/*</url-pattern>
	</servlet-mapping>
	<!-- 浏览器不支持put,delete等method,由该filter将/xxx?_method=delete转换为标准的http delete方法 -->
	<filter>
		<filter-name>HiddenHttpMethodFilter</filter-name>
		<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
	</filter>

@RequestMapping(value = "/guarantee/guarantee/productTypes", method = RequestMethod.GET)
	public void queryProductTypeList(HttpServletRequest httpRequest,
			HttpServletResponse httpResponse) throws Exception {
		JSONArray array = new JSONArray();
		User user = getLoginUser(httpRequest);
		Map map = new HashMap();
		map.put("user", user);
		List<ProductType> productTypes = productService.getProductTypeByCondition(map);
		if (productTypes != null&&productTypes.size()>0) {
			for (ProductType p : productTypes) {
				JSONObject jsonObject = GuaranteeActionUtil.productTypeToJson(p);
				array.add(jsonObject);
			}
		}
		productTypes = null;
		user = null;
		responseWrite(httpResponse, array);
	}