httpclient.execute(httpPost); 报错 org.apache.http.NoHttpResponseException: The target server failed to respond

http client . execute(http post)；错误报告org . Apache . http . nohttpresponseeexception:目标服务器未能响应http client . execute(http post)；报错org . Apache . http . nohttpresponsee异常:目标服务器响应失败简介:代理机器地址:10.23.21.1:8080 申请地址:10.23.1.2:8019 私有字符串httpSend(字符串url，字符串xml)抛出