场景：我需要点击HTTPS网址来获取.csv文件或其内容。我可以使用Chrome浏览器中的高级REST客户端插件成功获取所需内容。但是在尝试使用java代码执行相同操作时获取垃圾值。
代码：
find()即使使用POST方法，我也会得到相同的响应。谁能告诉我哪里出错或需要纠正什么。
提前致谢。
更新 根据@Hendrik Simon的回应，我可以以可读的格式获得响应。 但现在我面临另一个障碍。现在的回应是
public class AnotherBean {
private final String USER_AGENT = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.81 Safari/537.36";
public void printAnotherMessage() {
System.out.println("I am called by Quartz jobBean using CronTriggerFactoryBean");
AnotherBean anotherBean = new AnotherBean();
try {
System.out.println("Testing 1 - Send Http GET request");
anotherBean.sendGet();
// System.out.println("\nTesting 2 - Send Http POST request");
// anotherBean.sendPost();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
// HTTP GET request
private void sendGet() throws Exception {
String url = "https://xxx.xxx.com/xxxx/DownloadReport/2015/10/29/xxx/TransactionDetailReport.csv";
URL obj = new URL(url);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
// optional default is GET
con.setRequestMethod("GET");
// add request header
con.setRequestProperty("User-Agent", USER_AGENT);
con.setRequestProperty("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
con.setRequestProperty("Accept-Language", "en-US,en;q=0.8");
con.setRequestProperty("Content-Type", "text/plain; charset=utf-8");
con.setRequestProperty("Accept-Encoding", "gzip, deflate, sdch");
String urlParameters = "username=xxxx&password=xxxx";
con.setDoOutput(true);
con.setDoInput(true);
OutputStream wr = con.getOutputStream();
// wr.writeBytes(urlParameters);
wr.write(urlParameters.getBytes("UTF-8"));
wr.flush();
wr.close();
// con.connect();
int responseCode = con.getResponseCode();
System.out.println("\nSending 'GET' request to URL : " + url);
System.out.println("Response Code : " + responseCode);
System.out.println("Post parameters : " + urlParameters);
BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
// print result
System.out.println("Response: " + response.toString());
System.out
.println("Content Encoding: " + con.getContentEncoding() + "\nContent Length: " + con.getContentLength()
+ "\nContent Type: " + con.getContentType() + "\nContent: " + con.getContent());
}
// HTTP POST request
private void sendPost() throws Exception {
String url = "https://xxx.xxx.com/xxxx/DownloadReport/2015/10/29/xxx/TransactionDetailReport.csv";
URL obj = new URL(url);
HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();
// add reuqest header
con.setRequestMethod("POST");
con.setRequestProperty("User-Agent", USER_AGENT);
con.setRequestProperty("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
con.setRequestProperty("Accept-Language", "en-US,en;q=0.8");
con.setRequestProperty("Content-Type", "text/plain; charset=utf-8");
con.setRequestProperty("Accept-Encoding", "gzip, deflate, sdch");
String urlParameters = "username=xxx&password=xxxx";
// String urlParameters = "{" +
// "\"username\":\"xxxx\",\"password\":\"xxxx\"" +
// "}";
// Send post request
con.setDoOutput(true);
con.setDoInput(true);
// DataOutputStream wr = new DataOutputStream(con.getOutputStream());
OutputStream wr = con.getOutputStream();
// wr.writeBytes(urlParameters);
wr.write(urlParameters.getBytes("UTF-8"));
wr.flush();
wr.close();
// con.connect();
int responseCode = con.getResponseCode();
System.out.println("\nSending 'POST' request to URL : " + url);
System.out.println("Post parameters : " + urlParameters);
System.out.println("Response Code : " + responseCode);
BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
// BufferedReader inputReader = new BufferedReader(new
// InputStreamReader((InputStream) con.getContent()));
// String theString = IOUtils.toString(con.getInputStream(),
// StandardCharsets.UTF_16BE);
// byte[] byteArray = IOUtils.toByteArray(con.getInputStream());
// String theString = IOUtils.toString(byteArray);
String inputLine;
StringBuffer response = new StringBuffer();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
// System.out.println(" " + inputLine);
}
/*
* do { inputLine = inputReader.readLine(); response.append(inputLine +
* "\n"); } while (inputLine != null);
*/
// String finalResponse = new String(response, StandardCharsets.UTF_8);
// inputReader.close();
// print result
System.out.println("Response: " + response.toString());
// System.out.println("Response - theString: " + theString);
// System.out.println("Response String: " + byteArray);
System.out
.println("Content Encoding: " + con.getContentEncoding() + "\nContent Length: " + con.getContentLength()
+ "\nContent Type: " + con.getContentType() + "\nContent: " + con.getContent());
}
}
**Response:**
***Sending 'GET' request to URL :*** "https://xxx.xxx.com/xxxx/DownloadReport/2015/10/29/xxx/TransactionDetailReport.csv";
***Response Code :*** 200
***Post parameters :*** username=xxxx&password=xxxx
***Response:*** ‹ •UmoÓ0þÞ_aR!©YÓn¬Í"¡2H›?ø„.ñ%1sâ`;[â¿syiצÍ`NU;ñùîžçÎwþ‹wŸ—·ß¾\³Ôf2ø› ?F÷ÂJfžÇ\vƒú5»ÖZiÜì4RZ`QÚ ½rJ»oœvËØõF¬•ö{ûZ?¢»D«2çs–«™ÆÁ2i%%óè^×c±=÷g°]†Š¯;3ЉÈçlòºXÑéɬX-öb•[7†LÈõœ9ŸÊHp`4ä?»…Te0boµ ......
***Content Encoding:*** gzip
***Content Length:*** 761
***Content Type:*** text/html
***Content:*** sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@7c4ccb2f
当我在浏览器或REST客户端上使用相同的URL时，我通常会弹出一个窗口来输入凭据。在成功提交后，我获得了所需的数据。任何人都可以指导我如何使用JAVA代码处理这种情况吗？
答案 0 :(得分：3)
似乎响应是gzip编码的，你不解压缩。
尝试删除以下行
con.setRequestProperty("Accept-Encoding", "gzip, deflate, sdch");
<强>更新
正如@RealSkeptic正确提到的那样，如果数据是GET - 请求，则无法将数据写入连接。使用GET-Request，您必须将参数添加到URL，如下所示：
http://...?param1=bla¶m2=blubb
我认为，只要您拨打con.setDoOutput(true);，无论您将其设置为请求方法，您的连接都会自动执行POST请求。所以你永远不会在你的例子中提出GET-Request。
例如，当您使用Wireshark分析流量时，可以很容易地看到。
至于服务器错误，如果不复制它就不容易分析。在不知道URL的情况下重新生成它是不可能的，至少对我而言。