问题遇到的现象和发生背景
client.execute(method, context)执行超时后也没有返回值,入参打印后等超时时间(6秒)后下面的日志也没打印,方法最后返回了null
问题相关代码，请勿粘贴截图
public static String httpRequestToString(String url, String requestMethod,
Map<String, String> params, String lx,String ...auth){
//接口返回结果
String methodResult = null;
try {
String parameters = "";
boolean hasParams = false;
//将参数集合拼接成特定格式，如name=zhangsan&age=24
for(String key : params.keySet()){
String value = URLEncoder.encode(params.get(key), "UTF-8");
parameters += key +"="+ value +"&";
hasParams = true;
}
if(hasParams){
parameters = parameters.substring(0, parameters.length()-1);
}
//是否为GET方式请求
boolean isGet = "get".equalsIgnoreCase(requestMethod);
boolean isPost = "post".equalsIgnoreCase(requestMethod);
boolean isPut = "put".equalsIgnoreCase(requestMethod);
boolean isDelete = "delete".equalsIgnoreCase(requestMethod);
//创建HttpClient连接对象
DefaultHttpClient client = new DefaultHttpClient();
HttpRequestBase method = null;
if(isGet){
url += "?" + parameters;
method = new HttpGet(url);
}else if(isPost){
method = new HttpPost(url);
HttpPost postMethod = (HttpPost) method;
StringEntity entity = new StringEntity(parameters);
postMethod.setEntity(entity);
}else if(isPut){
method = new HttpPut(url);
HttpPut putMethod = (HttpPut) method;
StringEntity entity = new StringEntity(parameters);
putMethod.setEntity(entity);
}else if(isDelete){
url += "?" + parameters;
method = new HttpDelete(url);
}
method.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 6000);
//设置参数内容类型
method.addHeader("Content-Type",lx);
//httpClient本地上下文
HttpClientContext context = null;
if(!(auth==null || auth.length==0)){
String username = auth[0];
String password = auth[1];
UsernamePasswordCredentials credt = new UsernamePasswordCredentials(username,password);
//凭据提供器
CredentialsProvider provider = new BasicCredentialsProvider();
//凭据的匹配范围
provider.setCredentials(AuthScope.ANY, credt);
context = HttpClientContext.create();
context.setCredentialsProvider(provider);
}
//访问接口，返回状态码
log.info("client执行入参method:{},context:{},",method,context);
HttpResponse response = client.execute(method, context);
log.info("client执行的返参{},",response);
//返回状态码200，则访问接口成功
if(response.getStatusLine().getStatusCode()==200){
methodResult = EntityUtils.toString(response.getEntity());
}
client.close();
}catch (UnsupportedEncodingException e) {
e.printStackTrace();
}catch (IOException e) {
e.printStackTrace();
}
return methodResult;
}
运行结果及报错内容
方法最后返null,请求后的日志也没打印,偶发的,
