java - @RequestParam 任意值

Question

我的@Restcontroller 中有以下方法:

@GetMapping
public List<User> getByParameterOrAll(
        @RequestParam(value = "email", required = false) String email,
        @RequestParam(value = "phone", required = false) String phone) {

    List<User> userList;
    if ((email != null && !email.isEmpty()) && (phone == null || phone.isEmpty())) {
        userList = super.getByEmail(email);
    } else if ((email == null || email.isEmpty()) && (phone != null)) {
        userList = super.getByPhone(phone);
    } else {
        userList = super.getAll();
    }
    return userList;
}

此方法允许处理以下 GET 请求:

GET:   /customers/
GET:   /customers?email=emai@email.com
GET:   /customers?phone=8-812-872-23-34

但如果有必要，可以为请求添加更多参数。如果它将是 10 或... 20 个参数，则上述方法的主体出现得离谱!如果有任何方法可以将 @RequestParam 的值传递给方法体，我可以实现，例如:

@GetMapping
public List<User> getByParameterOrAll(
        @RequestParam(value = "any", required = false) String any) {

    if (value=="email") {
        userList = super.getByEmail(email);
    } else if (value=="email") {
        userList = super.getByPhone(email);
    } else if .....
}

有没有办法在方法体中使用@RequestParam-value？

Answer 1

@RequestParam

When an @RequestParam annotation is declared as a Map or MultiValueMap, without a parameter name specified in the annotation, then the map is populated with the request parameter values for each given parameter name.

@GetMapping
public List<User> getByParameterOrAll(@RequestParam Map<String, String> parameters){ 
....
}

将为您提供所有参数和值作为 map 。