In the case of the same request parameters

In the processing function of the controller, it is possible to encounter a situation where the parameters of the request have the same member:

@RequestMapping(value = "path",method = RequestMethod.POST)
public Map<String,Object> addPasswordInformation(A a,B b){
    // do something here
}

If both A and B have the same member c, the corresponding values cannot be automatically bound.

Solution#

Use the InitBinder annotation.

Define binder methods#

@InitBinder("a")
public void initUserBinder(WebDataBinder webDataBinder){
    webDataBinder.setFieldDefaultPrefix("classA.");
}

@InitBinder("b")
public void initUserBinder(WebDataBinder webDataBinder){
    webDataBinder.setFieldDefaultPrefix("classB.");
}

Add annotations to the parameters of the controller method#

@RequestMapping(value = "path",method = RequestMethod.POST)
public Map<String,Object> addPasswordInformation(@ModelAttribute("a") A a, 
                                                @ModelAttribute("b") B b){
    // do something here
}

The parameter of the @ModelAttribute("..") annotation should be the same as the parameter of the @InitBinder("..") annotation.

Modify the request data#

data = {
    'classA.c':'asdasdasd',
    ,
    'classB.c':'asdasdasd',
}

The above is Python code, but it is the same. Just change the key to include the prefix.