JAVA HttpURLConnection 与HttpClient 请求问题

使用sendPost1方法请求报500 直接抛出异常

使用doPostSoap方法也会报500但是会返回错误信息

使用sendPost1方法怎么能获取到和doPostSoap一样的结果？

public static String sendPost1(String path, Map param) throws IOException {
      
        String result="";
        // 创建url资源
        URL url = new URL(path);
        // 建立http连接
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        // 设置允许输出
        conn.setDoOutput(true);

        conn.setDoInput(true);

        // 设置不用缓存
        conn.setUseCaches(false);
        // 设置传递方式
        conn.setRequestMethod("POST");
        String token = getToken();
        conn.setRequestProperty("token",token);
        //转换为字节数组
        String param_str = JSONObject.toJSONString(param);
        // 设置文件类型:
        conn.setRequestProperty("Content-Type", "application/json;charset=UTF-8");


        // 开始连接请求
        conn.connect();
        OutputStream  out = conn.getOutputStream();     
        // 写入请求的字符串
        out.write((param_str.toString()).getBytes());
        out.flush();
        out.close();

        System.out.println(conn.getResponseCode());
        
        System.out.println(conn.getResponseMessage());
        System.out.println(conn.getRequestMethod());
```java

        // 请求返回的状态
   ```java if (conn.getResponseCode() == 200) {   ```
           System.out.println("连接成功");
            // 请求返回的数据
            InputStream in = conn.getInputStream();
            String a = null;
            try {
                byte[] data1 = new byte[in.available()];
                in.read(data1);
                // 转成字符串
                a = new String(data1);
                System.out.println(a);
            } catch (Exception e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
      } else {
    
     System.out.println("no++");
      }

    return result;
}



public static String doPostSoap(String postUrl, Map map) {
    String retStr = "";
    // 创建HttpClientBuilder
    HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
    // HttpClient
    CloseableHttpClient closeableHttpClient = httpClientBuilder.build();
    HttpPost httpPost = new HttpPost(postUrl);
            //  设置请求和传输超时时间
    RequestConfig requestConfig = RequestConfig.custom()
            .setSocketTimeout(30000)
            .setConnectTimeout(30000).build();
    httpPost.setConfig(requestConfig);
    try {
        String token = getToken();
        httpPost.setHeader("token", token);
        StringEntity data = new StringEntity(JSONObject.toJSONString(map),Charset.forName("UTF-8"));

        data.setContentEncoding("UTF-8");
        data.setContentType("application/json");
        httpPost.setEntity(data);
        CloseableHttpResponse response = closeableHttpClient
                .execute(httpPost);
        HttpEntity httpEntity = response.getEntity();
        int statusCode = response.getStatusLine().getStatusCode();
        System.err.println("获取返回信息，post请求，返回的 状态码：" + statusCode);
        if (httpEntity != null) {
            // 打印响应内容
            retStr = EntityUtils.toString(httpEntity, "UTF-8");
            //System.out.println("response:" + retStr);
        }
        // 释放资源
        closeableHttpClient.close();
    } catch (Exception e) {
        System.out.println(e);
    }
    return retStr;
}

获取请求返回的数据，返回状态不是200就执行不了下面的代码。把下面代码放在判断外面。

// 请求返回的数据
            InputStream in = conn.getInputStream();
            String a = null;
            try {
                byte[] data1 = new byte[in.available()];
                in.read(data1);
                // 转成字符串
                a = new String(data1);
                System.out.println(a);
            } catch (Exception e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }