Java中的InvocationTargetException

Question

我使用此功能

public static String postJson(String postUrl, String request) {         
    logger.info("postUrl = " + postUrl);        
    try {           
        HttpClient httpClient = HttpClientBuilder.create().build();             
        HttpPost post = new HttpPost(postUrl);          
        logger.info("request = " + cutLogForStreaming(request));            
        StringEntity postingString = new StringEntity(request);             
        post.setEntity(postingString);          
        post.setHeader("Content-type", "application/json");         
        HttpResponse response = httpClient.execute(post);           
        String result = EntityUtils.toString(response.getEntity());             
        logger.info("response = " + cutLogForStreaming(result));            
        return result;      
    } catch (Exception e) {             
        logger.info(e.getCause());          
        logger.error("Exception:: " + e.toString() + " "+ Arrays.toString(e.getStackTrace()));          
        return null;        
    }   
}

但是我调试它并抛出

在“ HttpClient httpClient = HttpClientBuilder.create（）。build（）;“处的调用目标异常”]]

有人可以解释为什么以及如何解决？

我使用此函数public static String postJson（String postUrl，String request）{logger.info（“ postUrl =” + postUrl）;尝试{HttpClient httpClient = ...

Answer 1

我将通过HttpUrlConnection采用“经典”方式。