使用Jsoup.connect(url).get()连接某网站时偶尔会出现
java.net.SocketTimeoutException:Read timed out异常。
原因是默认的Socket的延时比较短,而有些网站的响应速度比较慢,所以会发生超时的情况。
解决方法:
链接的时候设定超时时间即可。
doc = Jsoup.connect(url).timeout(5000).get();
5000表示延时时间设置为5s。
测试代码如下:
1,不设定timeout时:
package jsoupTest; import java.io.IOException; import org.jsoup.*;
import org.jsoup.helper.Validate;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements; public class JsoupTest {
public static void main(String[] args) throws IOException{
String url = "http://www.weather.com.cn/weather/101010400.shtml";
long start = System.currentTimeMillis();
Document doc=null;
try{
doc = Jsoup.connect(url).get();
}
catch(Exception e){
e.printStackTrace();
}
finally{
System.out.println("Time is:"+(System.currentTimeMillis()-start) + "ms");
}
Elements elem = doc.getElementsByTag("Title");
System.out.println("Title is:" +elem.text());
}
}
有时发生超时:
java.net.SocketTimeoutException: Read timed out
2,设定了则一般不会超时
package jsoupTest; import java.io.IOException; import org.jsoup.*;
import org.jsoup.helper.Validate;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements; public class JsoupTest {
public static void main(String[] args) throws IOException{
String url = "http://www.weather.com.cn/weather/101010400.shtml";
long start = System.currentTimeMillis();
Document doc=null;
try{
doc = Jsoup.connect(url).timeout(5000).get();
}
catch(Exception e){
e.printStackTrace();
}
finally{
System.out.println("Time is:"+(System.currentTimeMillis()-start) + "ms");
}
Elements elem = doc.getElementsByTag("Title");
System.out.println("Title is:" +elem.text());
}
}