@Operation(summary = "findByUserId", description = "Query the user information with the user ID.")
    @Parameter(description = "user id", name = "userId", required = true, schema = @Schema(type = "string", example = "100000"))
    @GetMapping("/findByUserId")
    public UserDTO findByUserId(@RequestParam("userId") final String userId) {
        return buildUser(userId, "hello world");
    }
Find by user id string.

@param userId the user id
@return the string
shenyu-examples/shenyu-examples-http-swagger3/src/main/java/org/apache/shenyu/examples/http/controller/HttpTestController.java