java.net.SocketTimeoutException: Read timed out

最新推荐文章于 2025-09-29 19:22:07 发布

最新推荐文章于 2025-09-29 19:22:07 发布 · 283 阅读

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#java

本文介绍了一种解决Java中SocketTimeoutException问题的方法。通过配置代理服务器并调整超时设置来解决读取超时的问题。

今天在一台虚拟机上部署公司项目的时候，出现java.net.SocketTimeoutException: Read timed out的问题

最后定位到如下地方：

httpURL = new URL(url);
System.out.println("-----------url:"+url+"--------------");
connection = (HttpURLConnection) httpURL.openConnection();
System.out.println("-----------httpURL.openConnection()--------------");
connection.setDoInput(true);
connection.setDoOutput(false);
connection.setRequestMethod("GET");
connection.setConnectTimeout(2000);
connection.setReadTimeout(2000);
System.out.println("-----------connection.setReadTimeout(30000)--------------");
connection.connect();
System.out.println("-----------connection.connect()--------------");
cin = connection.getInputStream();
System.out.println("-----------connection.getInputStream():"+cin.toString()+"--------------");
BufferedInputStream bci = new BufferedInputStream(cin);
System.out.println("-----------new BufferedInputStream(cin)--------------");
SAXReader reader = new SAXReader();
doc = reader.read(bci);
System.out.println("-----------doc = reader.read(bci);:"+doc.toString()+"--------------");

一开始并没有任何提示，这些提示都是后来加上去的

查了很多，大家给的提议要么就是提高机子的性能，要么就是将timeout的时间延长

提高机子的性能肯定不行了，于是我加大了timeout的时间，可是开始不行！！！！

郁闷，又看了看，网上似乎提到代理服务器好像跟这个有关，正好这时看见一个兄台提示，如是对代码做了以下修改

URL httpURL = null;
HttpURLConnection connection = null;
Document doc = null;
InputStream cin = null;
try {
Properties prop = System.getProperties();
System.getProperties().put("proxySet","true");
// 设置http访问要使用的代理服务器的地址
prop.setProperty("http.proxyHost","172.17.0.2");
// 设置http访问要使用的代理服务器的端口
prop.setProperty("http.proxyPort","8080");
httpURL = new URL(url);
System.out.println("-----------url:"+url+"--------------");
connection = (HttpURLConnection) httpURL.openConnection();
System.out.println("-----------httpURL.openConnection()--------------");
String authentication = "username:password"; // 用户名密码
String encodedLogin = new BASE64Encoder().encode(authentication.getBytes()); // 编码
connection.setRequestProperty("Proxy-Authorization", " Basic " + encodedLogin); // 授权
System.out.println("-----------connection.setRequestProperty:"+encodedLogin+"--------------");
connection.setDoInput(true);
connection.setDoOutput(false);
connection.setRequestMethod("GET");
connection.setConnectTimeout(10000);
connection.setReadTimeout(30000);
System.out.println("-----------connection.setReadTimeout(30000)--------------");
connection.connect();
System.out.println("-----------connection.connect()--------------");
cin = connection.getInputStream();
System.out.println("-----------connection.getInputStream():"+cin.toString()+"--------------");
BufferedInputStream bci = new BufferedInputStream(cin);
System.out.println("-----------new BufferedInputStream(cin)--------------");
SAXReader reader = new SAXReader();
doc = reader.read(bci);
System.out.println("-----------doc = reader.read(bci);:"+doc.toString()+"--------------");
} catch (Exception e) {
e.printStackTrace();
doc = null;
} finally {
if (cin != null) {
try {
cin.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if(connection!=null){
connection.disconnect();
}