jeecgboot/JeecgBoot · error · RuntimeException

method 不能为空

Error message

method 不能为空

What it means

Thrown by RestUtil.request(String,HttpMethod,...) — the overload without a timeout parameter — when the method (HttpMethod) argument is null. A null HTTP method is rejected before the request is built.

Source

Thrown at jeecg-boot/jeecg-boot-base-core/src/main/java/org/jeecg/common/util/RestUtil.java:209

    /**
     * 发送请求
     *
     * @param url          请求地址
     * @param method       请求方式
     * @param headers      请求头  可空
     * @param variables    请求url参数 可空
     * @param params       请求body参数 可空
     * @param responseType 返回类型
     * @return ResponseEntity<responseType>
     */
    public static <T> ResponseEntity<T> request(String url, HttpMethod method, HttpHeaders headers, JSONObject variables, Object params, Class<T> responseType) {
        log.debug(" RestUtil  --- request ---  url = "+ url);
        if (StringUtils.isEmpty(url)) {
            throw new RuntimeException("url 不能为空");
        }
        if (method == null) {
            throw new RuntimeException("method 不能为空");
        }
        if (headers == null) {
            headers = new HttpHeaders();
        }
        // 请求体
        String body = "";
        if (params != null) {
            if (params instanceof JSONObject) {
                body = ((JSONObject) params).toJSONString();

            } else {
                body = params.toString();
            }
        }
        // 拼接 url 参数
        if (variables != null && !variables.isEmpty()) {
            url += ("?" + asUrlVariables(variables));
        }

View on GitHub (pinned to 96fb33f5ec)

Solutions

1. Pass a non-null HttpMethod (GET, POST, PUT, DELETE, etc.).
2. Map the incoming method string with a default of HttpMethod.GET or HttpMethod.POST when it is absent/unknown.
3. Validate method is non-null before the call.

Example fix

// before
HttpMethod method = mapMethod(request.getMethod()); // may be null
RestUtil.request(url, method, headers, null, body, String.class);

// after
HttpMethod method = mapMethod(request.getMethod());
if (method == null) {
    method = HttpMethod.GET;
}
RestUtil.request(url, method, headers, null, body, String.class);

if (method == null) {
    throw new IllegalArgumentException("method 不能为空");
}

null

try {
    RestUtil.request(url, method, headers, variables, params, responseType);
} catch (RuntimeException e) {
    log.error("HTTP method 校验失败: {}", e.getMessage());
    return ResponseEntity.badRequest().build();
}

When it happens

Trigger: Calling RestUtil.request(url, method, ...) with method == null; method was derived from user/config input that was not mapped to an HttpMethod enum value.

Common situations: Caller passes a String method that failed to convert to HttpMethod; a switch/map mapping request method names returned null; default case missing when deriving HttpMethod.

Related errors

• url 不能为空
• sys.api.apiRequestFailed
• 模板缺少参数：${item}
• The file name can not null
• 非法存储路径，路径包含遍历字符: {storePath}

AI-assisted analysis of jeecgboot/JeecgBoot@96fb33f5ec (2026-08-14). Data as JSON: /api/errors/195d0de7400e2c74. Report an issue: GitHub.