SpringMVC响应处理详细解读

<bean id="templateResolver" class="org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver">
    <property name="prefix" value="/html/" />
    <property name="suffix" value=".html" />
    <property name="templateMode" value="HTML5"/>
</bean>

/**
 * 返回ModelAndView对象的方式
 * @return
 */
@RequestMapping("/save3")
public ModelAndView save3(){
    System.out.println("执行了...");
    // 创建mv对象
    ModelAndView mv = new ModelAndView();
    // 把一些数据，存储到mv对象中
    mv.addObject("msg","用户名或者密码已经存在");
    // 设置逻辑视图的名称
    mv.setViewName("suc");
    return mv;
}

    /**
     * 请求转发：
     * @param request
     * @param response
     * @throws IOException
     * @throws ServletException
     */
    @RequestMapping("/test1")
    public void test1(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
        System.out.println("test1="   request.getParameter("name"));
        request.setAttribute("msg", "你好");
        //request.getRequestDispatcher("/dept/test2").forward(request,response);
        request.getRequestDispatcher("/html/suc.html").forward(request, response);
    }
    /**
     * 重定向：
     * @param request
     * @param response
     * @throws IOException
     */
    @RequestMapping("t3")
    public void test3(HttpServletRequest request, HttpServletResponse response) throws IOException {
        System.out.println("我是test3");
        //response.sendRedirect("/SpringMVCTest/dept/t4");
        response.sendRedirect("/SpringMVCTest/html/suc.html");
    }

<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-databind</artifactId>
  <version>2.9.0</version>
</dependency>
<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-core</artifactId>
  <version>2.9.0</version>
</dependency>
<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-annotations</artifactId>
  <version>2.9.0</version>
</dependency>

<!--设置静态资源不过滤-->
<mvc:resources mapping="/css/**" location="/css/"/> <!--样式-->
<mvc:resources mapping="/images/**" location="/images/"/> <!--图片-->
<mvc:resources mapping="/js/**" location="/js/"/> <!--javascript-->

/**
 * 异步的数据交互
 * 重定向
 * @return
 */
@RequestMapping("/save6")
public @ResponseBody User save6(User user){
    System.out.println(user);
    // 模拟，调用业务层代码
    user.setUsername("hello");
    user.setAge(100);
    // 把user对象转换成json，字符串，再响应。使用@ResposeBody注解 response.getWriter().print()
    return user;
}