Spring控制器方法使用不同的参数共享我的多个@RequestMapping url

Question

I have added the following method to the OwnerController class in the Spring PetClinic sample application :

//'''''''''CodeMed added this next method
@RequestMapping(value = "/owners/catowners", method = RequestMethod.GET)
public String findOwnersOfPetType(Map<String, Object> model) {
    // find owners of a specific type of pet
    Integer typeID = 1;//this is just a placeholder
    Collection<Owner> results = this.clinicService.findOwnerByPetType(typeID);
    model.put("selections", results);
    return "owners/catowners";
 }
//'''''''''''''''''''

Since the typeID for cats in the petclinic database is 1, the above returns a list of cat owners. But I also want to create separate pages on the site for dog owners, lizard owners, hamster owners, and owners of any other kind of pet. Do I need to create a separate version of findOwnersOfPetType() for each pet type? Like findDogOwners(), findLizardOwners(), findHamsterOwners(), etc.? Or can I have the findOwnersOfPetType() method accept an int parameter indicating the pet type?

What about jsp files? Do I need to create a separate jsp file for each of catowners.jsp, dogowners.jsp, lizardowners.jsp, hamsterowners.jsp, etc.? Or can I somehow create one jsp that is populated with different data in the same format for each type of pet?

How would this look in code?

The ClinicService and OwnerRepository functions are already handled together because the function I posted above calls a ClinicService method using a parameter created in the function.

Answer 1

You can use a RequestMapping with a PathVariable . For example:

@RequestMapping(value = "/owners/{petId}", method = RequestMethod.GET)
public String findOwnersOfPetType(Map<String, Object> model,
    @PathVariable int petId) {
    //use id as before
}

If you want to use strings in your URLs instead of integers, you can make them more user friendly by using Strings in the URLs instead and having an enum mapping between those Strings and their IDs.

Answer 2

You can add a type parameter to your request mapping:

@RequestMapping(value = "/owners/{type}", method = RequestMethod.GET)
public String findOwnersOfPetType(@PathVariable("type") it type) {

}

So you don't need different controller methods for handling multiple types.

The service method depends on how you model your domain objects. If you have a single class Pet which contains a petType you could easily do something like this:

Collection<Owner> results = this.clinicService.findOwnerByPetType(type);

The service then calls the repository method findOwnerByPetType(type) which returns the list of owners