Spring MVC 处理模型数据

SpringMVC 处理模型数据：

　　1 controller接收pojo：

    <form action="save" method="get">
        <label for="">用户名：<input type="text" name="username" /></label>
　　　　 <label for="">密码：<input type="password" name="password" /></label>
        <label for="">年龄：<input type="text" name="age" /></label>
        <label for="">邮箱：<input type="text" name="email" /></label>
　　　　 <label for="">省份：<input type="text" name="address.province" />
　　　　 </label> <label for="">城市：<input type="text" name="address.city" /></label>
        <button>保存</button>
    </form>

    @RequestMapping("/save")
    public String save(User user) {

        System.out.println(user);

        return "success";
    }

　　2 controller接收model：

   @RequestMapping("/edit2")
    public String edit1(Model model) {

        User user = new User();
        user.setUsername("harry");
        user.setPassword("123");
        user.setAge(17);
        user.setEmail("11@qq.com");

        Address address = new Address();
        address.setProvince("horwards");
        address.setCity("potter");
        user.setAddress(address);
        model.addAttribute("user", user);
        return "user/form";
    }

　　3 controller返回modleAndView：

<form action="save" method="get">
    <label for="">用户名：<input type="text" name="username" value="${user.username}"/></label>
    <label for="">密码：<input type="password" name="password" value="${user.password}"/></label>
    <label for="">年龄：<input type="text" name="age" value="${user.age}"/></label>
    <label for="">邮箱：<input type="text" name="email" value="${user.email}"/></label>
    <label for="">省份：<input type="text" name="address.province" value="${user.address.province}"/></label>
    <label for="">城市：<input type="text" name="address.city" value="${user.address.city}"/></label>
    <button>保存</button>
</form>

    @RequestMapping("/edit")
    public ModelAndView edit() {

        User user = new User();
        user.setUsername("draco");
        user.setPassword("123");
        user.setAge(17);
        user.setEmail("11@qq.com");

        Address address = new Address();
        address.setProvince("horwards");
        address.setCity("malfoy");

        user.setAddress(address);

        ModelAndView mv = new ModelAndView();
        mv.setViewName("user/form");
        mv.addObject("user", user);

        return mv;
    }