Unrecognized token ‘xx‘: was expecting (JSON String, Number, Array, Object or token ‘null‘, ‘true‘..

迷南。 2024-04-06 12:48 85阅读 0赞

一，业务场景

与第三方对接，需要调第三方接口，用postmen都可以正常请求，但是用java代码写的post请求就报错。

二、报错信息

2、JSON parse error: Unrecognized token 'license': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false'); nested exception is com.fasterxml.jackson.core.JsonParseException: Unrecognized token 'license': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false')\\n at \[Source: (org.springframework.util.StreamUtils$NonClosingInputStream); line: 1, column: 9\]

三问题原因：

很明显就是入参“license”解析报错，具体而言，和接口的 @RequestBody关键字有关，在后台参数反序列化过程中出错了。

四、post请求代码

这里是参考我之前写的一个post请求

我这里的写法会有两个问题，对应上面的两个报错

[java实现http,post请求\_凌抆莂的博客-CSDN博客][java_http_post_-CSDN]

public static String send(String url, Map<String, String> map, String encoding) throws Exception {
    		String body = "";
    		// 创建httpclient对象
    		CloseableHttpClient client = HttpClients.createDefault();
    		// 创建post方式请求对象
    		HttpPost httpPost = new HttpPost(url);
    		// 装填参数
    		List<NameValuePair> nvps = new ArrayList<NameValuePair>();
    		if (map != null) {
    			for (Entry<String, String> entry : map.entrySet()) {
    				nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
    			}
    		}
    		// 设置参数到请求对象中
    		httpPost.setEntity(new UrlEncodedFormEntity(nvps, encoding));
    		// 设置header信息
    		// 指定报文头【Content-type】、【User-Agent】
    		httpPost.setHeader("Content-type", "application/json;charset=UTF-8");
    		// 执行请求操作，并拿到结果（同步阻塞）
    		CloseableHttpResponse response = client.execute(httpPost);
    		// 获取结果实体
    		HttpEntity entity = response.getEntity();
    		if (entity != null) {
    			// 按指定编码转换结果实体为String类型
    			body = EntityUtils.toString(entity, encoding);
    		}
    		EntityUtils.consume(entity);
    		// 释放链接
    		response.close();
    		return body;
    	}

五、解决办法

将httpPost.setEntity(new UrlEncodedFormEntity(nvps, encoding));

改为httpPost.setEntity(new StringEntity(str, encoding));

修改后的请求

public static void main(String[] args) {
            String urlPath = "xxxxxx";
            JSONObject param = new JSONObject();
            JSONObject jsonObject = new JSONObject();
            List list = new ArrayList();
            param.put("license", "111");
            list.add(jsonObject);
            param.put("record", list);
            TdLog.error("1111========"+param);;
            String post = send(urlPath, param.toJSONString(), "UTF-8");
        }
    
    
        public static String send(String url, String str, String encoding) {
            String body = "";
            try {
                // 创建httpclient对象
                CloseableHttpClient client = HttpClients.createDefault();
                // 创建post方式请求对象
                HttpPost httpPost = new HttpPost(url);
                // 设置参数到请求对象中
                httpPost.setEntity(new StringEntity(str, encoding));
                // 设置header信息
                // 指定报文头【Content-type】、【User-Agent】
                httpPost.setHeader("Content-type", "application/json;charset=UTF-8");
                // 执行请求操作，并拿到结果（同步阻塞）
                CloseableHttpResponse response = client.execute(httpPost);
                // 获取结果实体
                HttpEntity entity = response.getEntity();
                if (entity != null) {
                    // 按指定编码转换结果实体为String类型
                    body = EntityUtils.toString(entity, encoding);
                }
                EntityUtils.consume(entity);
                // 释放链接
                response.close();
                return body;
            } catch (Exception e1) {
                e1.printStackTrace();
                return "";
    
            }
        }

参考：[JSON parse error: Unrecognized token 'xxx': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false'); - 少帅府 - 博客园][JSON parse error_ Unrecognized token _xxx_ was expecting _JSON String_ Number_ Array_ Object or token _null_ _true_ or _false_ - _ -]

[java_http_post_-CSDN]: https://blog.csdn.net/weixin_40873693/article/details/103061467
[JSON parse error_ Unrecognized token _xxx_ was expecting _JSON String_ Number_ Array_ Object or token _null_ _true_ or _false_ - _ -]: https://www.cnblogs.com/ShaoShuai20160203/p/14301987.html