如何在spring-rest中嵌套@PathVariable？

Question

我有一个简单的@RestController服务，它接受查询参数，spring自动将它们解析成bean

@ResponseStatus(HttpStatus.OK)
@RequestMapping(value = "/rest", method = RequestMethod.GET)
public MyDTO getGiataHotel(@Valid MyParams p) {
    Sysout(p.getId()); //prints "123"
}

public class MyParams {
    private int id;
    //private SubParams subs;
}

查询：.../rest?id=123

现在我想用嵌套的类来构造参数对象。我如何才能做到这一点？

public class SubParams {
   private String name;
   //some more
}

理想情况下，我的查询应该是: Query：.../rest?id=123&name=test，并且“SubParams”字符串应该进入测试bean。

这有可能吗？

Answer 1

如果需要设置为内部类，则必须注册Custom Covertor。更改如下：

@ResponseStatus(HttpStatus.OK)
@RequestMapping(value = "/rest", method = RequestMethod.GET)
public MyDTO getGiataHotel(@ModelAttribute("subParam") MyParams params, @Valid MyParams p) {
    //Do stuff
}

subParam表示有一个已注册进行转换的转换器。

public class MyParamsConverter implements Converter<String, MyParams> {

    @Override
    public MyParams convert(String name) {
        MyParams myParams = new MyParams();
        SubParams subParams = new SubParams();
        subParams.setName(name);
        myParams.setSubParams(subParams);
        return myParams;
    }

}

Answer 2

您可以通过使用@ModelAttribute注释来实现这一点：http://docs.spring.io/spring/docs/3.1.x/spring-framework-reference/html/mvc.html#mvc-ann-modelattrib-method-args (这不在Path参数中，而是在get/post的requestParams中)

@RequestMapping(value="/owners/{ownerId}/pets/{petId}/edit", method =   RequestMethod.POST)
public String processSubmit(@ModelAttribute("pet") Pet pet, BindingResult result) {

     if (result.hasErrors()) {
         return "petForm";
     } 

     // ...       

}

Answer 3

也许你应该使用RequestMethod.POST，如下所示

@RequestMapping(value = "/rest", method =   RequestMethod.POST)
public ModelAndView getGiataHotel(@ModelAttribute("subparams") SubParams subparams){
      SubParams sub=subparams;
      //do something...
}