The Java third-party interface receives parameter information in two ways: Request parameters: stored in the HTTP request, including query string and request body. Path parameters: Embedded in the URI path, parsed by the server and passed to interface methods.
Java third-party interface receives parameter information
How to receive parameter information?
The Java third-party interface can receive parameter information in the following two ways:
- Request Parameters: stored in the HTTP request In the request line or request body, received and parsed by the server.
- Path Parameters: Placeholders embedded in the URI path, parsed by the server and passed to the interface method.
Request parameters
-
GET request: Parameters are appended to the end of the URL as query strings, for example:
https://example.com/api/users?name=John&age=30
-
POST request: Parameters are included in the request body, usually in JSON or XML format, e.g. :
{"name": "John", "age": 30}
Path parameter
- The parameter is as Placeholders are included in the URI path, for example:
https://example.com/api/users/{userId}
- The placeholder name is usually the same as the parameter name in the interface method Correspondingly, for example:
@PathVariable("userId") Long userId
Receive request parameters
@PostMapping("/users") public User createUser(@RequestBody User user) { // user 参数从请求正文中解析出来 }
@GetMapping("/users") public List<User> findUsers(@RequestParam String name, @RequestParam Integer age) { // name 和 age 参数从查询字符串中解析出来 }
Receive path Parameter
@GetMapping("/users/{userId}") public User findUserById(@PathVariable("userId") Long userId) { // userId 参数从 URI 路径解析出来 }
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