Spring MVC:拒绝匹配映射

Question

考虑这样一种情况：我们可以有多个具有相同正则表达式的映射，这些映射应该以编程方式进行验证(例如针对数据库(。

(这不是一段有效的代码，我只是想解释我想要实现的目标。请注意网址路径中的正则表达式(

// Animal controller
@GetMapping(path = "/{animal-category [a-z-]+}/{animal-name [a-z-]+}")
public void show(@PathVariable String animalCategory, @PathVariable String animalName) {
    // if animalCategory is not found in database, continue with next controller
}
// Plants controller
@GetMapping(path = "/{plant-category [a-z-]+}/{plant-name [a-z-]+}")
public void show(@PathVariable String plantCategory, @PathVariable String plantName) {
    // if plantCateogry is not found in database, continue with next controller - as there is no more, it should return 404
}

Answer 1

您可以使用如下所示的常规控制器方法解决此问题：

// General controller method
@GetMapping(path = "/{category [a-z-]+}/{name [a-z-]+}")
public void show(@PathVariable String category, @PathVariable String name) {
    // look in database for the category
    if(isAnimalCatagory) {
        return showAnimal(category, name);
    } 
    else if(isPlantCategory) }
        return showPlant(category, name);
    }
    return "redirect:/404";
}
public void showAnimal(String animalCategory, String animalName) {
    // for animal categories
}
public void showPlant(String plantCategory, String plantName) {
    // for plant categories
}