SpringMVC实现前端后台交互传递数据

@Controllerpublic class DataController {    //一、接收和通过ModelMap传出参数,不需要视图解析器,测试时加了解析器，顾返回值不需后缀  //普通参数  @RequestMapping("/data1")  public String data1(@RequestParam("uname")String name,ModelMap mm){    //接收数据    //1.页面提交的表单域名和参数名需相同    //2.非要与提交的表单域名不一样的时候，如上加@RequestParam("uname")，但提交的表单域名名必须和uname相同//    System.out.println(name);        //传递数据到页面，添加ModelMap mm，类似request.setAttribute()    mm.addAttribute("uname", name);    return "data";  }    //对象参数  @RequestMapping("/data2")  public String data2(User user,ModelMap mm){    //接收数据    //提交的表单域名需和对象里的属性名一致//    System.out.println(user);        //传递数据到页面，添加ModelMap mm，类似request.setAttribute()    mm.addAttribute("user", user);        return "data";  }    //二、接收和通过ModelAndView传出参数,需要配置视图解析器  @RequestMapping("/data3")  public ModelAndView data3(HttpServletRequest req,HttpServletResponse resp){    ModelAndView mv = new ModelAndView();    User user = new User();    //接收数据    user.setName(req.getParameter("name"));    user.setPassword(req.getParameter("password"));    //传递数据    req.setAttribute("uname", user.getName());    req.setAttribute("user", user);    mv.setViewName("data");    return mv;  }}

　<mvc:annotation-driven />  <!-- viewResolver -->  <bean id="viewResolver"    class="org.springframework.web.servlet.view.UrlBasedViewResolver">    <!-- 视图解析类型 -->    <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>    <!-- 设置前缀 -->    <property name="prefix" value="/"/>    <!-- 设置后缀 -->    <property name="suffix" value=".jsp"/>  </bean>      <context:component-scan base-package="com.xhx.controller" />