Spring MVC前后端的数据传输的实现方法

@RequestMapping(value = "/index", method = RequestMethod.POST)
public String index(Model model){
 String greeting = "Hello !"
 model.addAttribute("greetingStr", greeting);
 return "index";
}

@RequestMapping(value = "/index", method = RequestMethod.POST)
public String index(Model model){
 String greeting = "Hello !"
 return greeting;
}

@RequestMapping(value = "/index", method = RequestMethod.POST)
public String index(Map map){
 String greeting = "Hello !"
 map.put("greetingStr", greeting);
 return "index";
}

@RequestMapping(value = "/index", method = RequestMethod.POST)
public String index(Model model){
 String greeting = "Hello !"
 model.addAttribute(greeting);
 return "index";
}
//此时的"greeting"的key会被设置为"String"，等价于map.put("String", greeting);

@RequestMapping(value = "/aa", method = RequestMethod.POST)
public String func(Model model, @RequestParam("name") String name) {
 ...
}

@RequestMapping(value = "/aa/{name}", method = RequestMethod.POST)
public String func(Model model, @PathVariable("name") String name) {
 ...
}

<form action="/login" method="post">
 name:<input type="text" name="name"/>
 password:<input type="text" name="password"/>
 <input type="submit"/>
</form>

@RequestMapping(value = "/login", method = RequestMethod.POST)
public String add(Model model, String name, String password){
 ...
}

public User {
 String name;
 String password;
 ...Setter()
 ...Getter()
}

@RequestMapping(value = "/login", method = RequestMethod.POST)
public String add(Model model, User user){
 ...
}