第三章 Spring MVC Servlet API与Json的支持

Spring MVC 对 Servlet API 的支持：

	/**
	 * 将当前用户设置到cookie，使用Servlet API
	 * 
	 * @param request
	 * @param response
	 * @return
	 */
	@RequestMapping("/login")
	public String login(HttpServletRequest request, HttpServletResponse response) {
		System.out.println("----登录验证---");
		String userName = request.getParameter("userName");
		String password = request.getParameter("password");
		Cookie cookie = new Cookie("user", userName + "-" + password);
		//cookie有效时间
		cookie.setMaxAge(1 * 60 * 60 * 24 * 7);
		User currentUser = new User(userName, password);
		response.addCookie(cookie);
		HttpSession session = request.getSession();
		session.setAttribute("currentUser", currentUser);
		return "redirect:/main.jsp";
	}

Spring MVC 对Json的支持：

1、添加命名空间

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">

2、增加标签

<!-- 支持对象与json的转换。 -->
<mvc:annotation-driven/> 

3、添加jackson jar

jackson-annotations-2.2.1.jar
jackson-core-2.2.1.jar
jackson-core-asl-1.8.8.jar
jackson-databind-2.2.1.jar
jackson-mapper-asl-1.8.8.jar
jackson-module-jaxb-annotations-2.2.1.jar



访问路径：
http://localhost:8080/SpringMvc0201/login.jsp