Ok so I wrote a piece of code testing ability of my java to connect to internet. It is supposed to fetch html from www.google.com and display the contents in a JFrame's JTextArea object. Here's the code, so you can have clear picture:
好吧,我写了一段代码测试能力,我的java连接到互联网。它应该从www.google.com获取html并在JFrame的JTextArea对象中显示内容。这是代码,所以你可以有清晰的图片:
import java.awt.Color;
import java.awt.Dimension;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import javax.swing.JFrame;
import javax.swing.JTextArea;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
public class JSoupFetchTest extends JFrame{
String userAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0";
boolean jsoupcond = true;
String address = "http://www.google.com";
JTextArea text;
public JSoupFetchTest(){
text = new JTextArea();
text.setPreferredSize(new Dimension(500, 500));
text.setBackground(Color.BLACK);
text.setForeground(Color.WHITE);
text.setVisible(true);
text.setLineWrap(true);
this.add(text);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setVisible(true);
this.pack();
gogo();
}
private void gogo() {
if(jsoupcond){
text.setText(text.getText() +"\nstart...");
try {
text.setText(text.getText() +"\nConnecting to " +address+ "...");
Document doc = Jsoup.connect(address).userAgent(userAgent).get();
text.setText(text.getText() +"\nConverting page document into text");
String s = doc.toString();
text.setText(text.getText() +"\nText: \n" +s);
System.out.println();
} catch (Exception e) {
text.setText(text.getText() +"\n" +e.toString());
e.printStackTrace();
}
text.setText(text.getText() +"\nEnd.");
}
String html = downloadHtml(address);
text.setText(text.getText() +"\nDownloading HTML...");
text.setText(text.getText() +"\nHTML:");
text.setText(text.getText() +"\n" +html);
}
private String downloadHtml(String path) {
text.setText(text.getText() +"\ndownloadHtml entry point...");
InputStream is = null;
try {
text.setText(text.getText() +"\ntry block entered...");
String result = "";
String line;
URL url = new URL(path);
text.setText(text.getText() +"\nabout to open url stream...");
is = url.openStream(); // throws an IOException
text.setText(text.getText() +"\nurl stream opened...");
BufferedReader br = new BufferedReader(new InputStreamReader(is));
text.setText(text.getText() +"\nstarting to read lines...");
while ((line = br.readLine()) != null) {
result += line;
}
text.setText(text.getText() +"\nreading lines finished...");
return result;
} catch (IOException ioe) {
ioe.printStackTrace();
} finally {
try {
if (is != null) is.close();
} catch (IOException ioe) { }
}
return "";
}
public static void main(String[] args) {
new JSoupFetchTest();
}
}
I should also add that:
1. My eclipse (cause that's what I'm using) can't connect to marketplace nor can't fetch updates.
2. Eclipse's web browser works fine.
3. My system's browser (Mozilla Firefox) connects fine
4. I exported JSoupFetchTest into a runnable jar and tried to run it from system's level, with no effect
5. I am running Windows 7 Professional MSDN version
6. I contacted eclipse support and they concluded it is not eclipse's fault and suggested that I'm behind a proxy.
7. I contacted my ISP to see if I indeed am and they said I am not.
8. I changed my JAVA's network settings so now it connects "directly". Before the setting was "use browser settings" and it didn't work either.
9. My eclipse's Window -> Preferences -> General -> Network Connections active provider is set to "Native", I also tried "Direct"
10. Method downloadHtml(String path) stops at "is = url.openStream();" and goes on forever...
我还应该补充一点:1。我的eclipse(导致我正在使用的东西)无法连接到市场,也无法获取更新。 2. Eclipse的Web浏览器工作正常。 3.我的系统的浏览器(Mozilla Firefox)连接正常4.我将JSoupFetchTest导出到一个可运行的jar中并试图从系统级别运行它,没有效果5.我正在运行Windows 7 Professional MSDN版本6.我联系了eclipse支持他们得出结论,这不是日食的错,并暗示我是在代理人背后。我联系了我的ISP,看看我是不是,他们说我不是。 8.我改变了我的JAVA的网络设置,所以现在它“直接”连接。设置之前是“使用浏览器设置”,它也不起作用。 9.我的eclipse的窗口 - >首选项 - >常规 - >网络连接活动提供程序设置为“本机”,我也尝试“直接”10.方法downloadHtml(字符串路径)停在“is = url.openStream();”并继续下去......
The exception I get from JSoup is:
我从JSoup得到的例外是:
java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:150)
at java.net.SocketInputStream.read(SocketInputStream.java:121)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:286)
at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:703)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:647)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1534)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1439)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:453)
at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:434)
at org.jsoup.helper.HttpConnection.execute(HttpConnection.java:181)
at org.jsoup.helper.HttpConnection.get(HttpConnection.java:170)
at JSoupFetchTest.gogo(JSoupFetchTest.java:42)
at JSoupFetchTest.<init>(JSoupFetchTest.java:32)
at JSoupFetchTest.main(JSoupFetchTest.java:92)
I also tried to set JSoup.connect's timeout to infinity. Then it goes on forever.
我还尝试将JSoup.connect的超时设置为无穷大。然后它会永远持续下去。
Before you guys say that my question is a duplicate, or delegate me to other, external possible solutions to my problem, believe me - either the question is mine or I was there - I browse internet in search for solution for weeks now and I feel like pulling my hair out...
Please help if you can cause it prevents me from installing stuff in my eclipse and from developing anything else than stand alone apps...
在你们说我的问题是重复的,或者将我委托给我的问题的其他外部可能的解决方案之前,相信我 - 问题是我的或者我在那里 - 我现在浏览互联网寻求解决方案几周了,我觉得喜欢把我的头发拉出来...请帮助,如果你可以导致它阻止我在我的日食中安装东西和开发除了独立的应用程序之外的任何东西...
2 个解决方案
#1
You need a socket number after the URL -- "http:/www.google.com:80" works. JSoup likely uses defaults for that, but opening the URL as a stream in Java does not.
URL后面需要一个套接字号 - “http:/www.google.com:80”有效。 JSoup可能会使用默认值,但在Java中打开URL作为流不会。
#2
The following program works for me. So Java and JSoup are working. It has to be some sort of local configuration problem with your network. Check your firewall, routers, gateway, and Java permissions. Do a clean rebuild of your project. Etc. Comment out lines until it does work and then put the lines back one at a time until you find the problem. Etc.
以下程序适合我。所以Java和JSoup正在发挥作用。它必须是您的网络的某种本地配置问题。检查防火墙,路由器,网关和Java权限。对项目进行干净的重建。等等。注释掉直到它确实工作的行,然后一次一行地返回一行,直到找到问题为止。等等。
package stuff;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;
import java.net.URLConnection;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
public class SocketTest
{
public static void main( String[] args ) throws Exception
{
URL url = new URL( "http://www.google.com" );
URLConnection sock = url.openConnection();
InputStream ins = sock.getInputStream();
BufferedReader reader = new BufferedReader( new InputStreamReader(ins, "UTF-8" ) );
for( String line; (line = reader.readLine()) != null; ) {
System.out.println( line );
}
ins.close();
Document doc = Jsoup.connect( "http://www.google.com" ).get();
System.out.println( doc.toString() );
String userAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0";
Document doc2 = Jsoup.connect( "http://www.google.com" ).userAgent(userAgent).get();
System.out.println( doc2.toString() );
}
}
#1
You need a socket number after the URL -- "http:/www.google.com:80" works. JSoup likely uses defaults for that, but opening the URL as a stream in Java does not.
URL后面需要一个套接字号 - “http:/www.google.com:80”有效。 JSoup可能会使用默认值,但在Java中打开URL作为流不会。
#2
The following program works for me. So Java and JSoup are working. It has to be some sort of local configuration problem with your network. Check your firewall, routers, gateway, and Java permissions. Do a clean rebuild of your project. Etc. Comment out lines until it does work and then put the lines back one at a time until you find the problem. Etc.
以下程序适合我。所以Java和JSoup正在发挥作用。它必须是您的网络的某种本地配置问题。检查防火墙,路由器,网关和Java权限。对项目进行干净的重建。等等。注释掉直到它确实工作的行,然后一次一行地返回一行,直到找到问题为止。等等。
package stuff;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;
import java.net.URLConnection;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
public class SocketTest
{
public static void main( String[] args ) throws Exception
{
URL url = new URL( "http://www.google.com" );
URLConnection sock = url.openConnection();
InputStream ins = sock.getInputStream();
BufferedReader reader = new BufferedReader( new InputStreamReader(ins, "UTF-8" ) );
for( String line; (line = reader.readLine()) != null; ) {
System.out.println( line );
}
ins.close();
Document doc = Jsoup.connect( "http://www.google.com" ).get();
System.out.println( doc.toString() );
String userAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:37.0) Gecko/20100101 Firefox/37.0";
Document doc2 = Jsoup.connect( "http://www.google.com" ).userAgent(userAgent).get();
System.out.println( doc2.toString() );
}
}