httpClient 超时时间设置（转）

转自：http://blog.csdn.net/hi_kevin/article/details/32316171

HttpClient在使用中有两个超时时间，是一直接触和使用的，由于上次工作中使用httpClient造成了系统悲剧的情况，特地对它的两个超时时间进行了小小的测试，在这里记录下。

     测试版本为HttpClient——3.1

     一：连接超时：connectionTimeout

     1：指的是连接一个url的连接等待时间。

     2：设置方法为：

     public class TestHttpClientMain {

 /** ?* @param args ?*/ public static void main(String[] args) { ?HttpClient client = new HttpClient(); ?HttpMethod method = new GetMethod( ???"http://test.com"); ?client.getHttpConnectionManager().getParams() ???.setConnectionTimeout(3000); ?client.getHttpConnectionManager().getParams().setSoTimeout(3000); ?try { ??int statusCode = client.executeMethod(method); ??System.out.println(statusCode); ??byte[] responseBody = null; ??responseBody = method.getResponseBody(); ??String result = new String(responseBody); ??System.out.println(result); ?} catch (HttpException e) { ??// TODO Auto-generated catch block ??e.printStackTrace(); ?} catch (IOException e) { ??// TODO Auto-generated catch block ??e.printStackTrace(); ?} }}

     3：测试的时候，将url改为一个不存在的url：“http://test.com”

     4：超时时间3000ms过后，系统报出异常。

     org.apache.commons.httpclient.ConnectTimeoutException: The host did not accept the connection within timeout of 3000 ms

 at org.apache.commons.httpclient.protocol.ReflectionSocketFactory.createSocket(ReflectionSocketFactory.java:155) at org.apache.commons.httpclient.protocol.DefaultProtocolSocketFactory.createSocket(DefaultProtocolSocketFactory.java:125) at org.apache.commons.httpclient.HttpConnection.open(HttpConnection.java:707) at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:387) at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171) at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)

     二：读取数据超时：soTimeout

     1：指的是连接上一个url，获取response的返回等待时间

     2：设置方法

     public class TestHttpClientMain {

 /** ?* @param args ?*/ public static void main(String[] args) { ?HttpClient client = new HttpClient(); ?HttpMethod method = new GetMethod( ???"http://localhost:8080/firstTest.htm?method=test"); ?client.getHttpConnectionManager().getParams() ???.setConnectionTimeout(3000); ?client.getHttpConnectionManager().getParams().setSoTimeout(2000); ?try { ??int statusCode = client.executeMethod(method); ??System.out.println(statusCode); ??byte[] responseBody = null; ??responseBody = method.getResponseBody(); ??String result = new String(responseBody); ??System.out.println(result); ?} catch (HttpException e) { ??// TODO Auto-generated catch block ??e.printStackTrace(); ?} catch (IOException e) { ??// TODO Auto-generated catch block ??e.printStackTrace(); ?} }}

     3：测试的时候的连接url为我本地开启的一个url，http://localhost:8080/firstTest.htm?method=test

     在我这个测试url里，当访问到这个链接时，线程sleep一段时间，来模拟返回response超时。

     @RequestMapping(params = "method=test") //<——②

 ???public String testMethod(ModelMap model) { ?try { ??Thread.sleep(3000); ?} catch (InterruptedException e) { ??// TODO Auto-generated catch block ??e.printStackTrace(); ?} ???????System.out.println("call testMethod method."); ???????model.addAttribute("name", "test method"); ?return "test"; ???}

     4：将读取response返回超时时间设的时间比那个sleep时间短之后，运行程序给出异常：

      java.net.SocketTimeoutException: Read timed out

 at java.net.SocketInputStream.socketRead0(Native Method) at java.net.SocketInputStream.read(Unknown Source) at java.io.BufferedInputStream.fill(Unknown Source) at java.io.BufferedInputStream.read(Unknown Source) at org.apache.commons.httpclient.HttpParser.readRawLine(HttpParser.java:78) at org.apache.commons.httpclient.HttpParser.readLine(HttpParser.java:106) at org.apache.commons.httpclient.HttpConnection.readLine(HttpConnection.java:1116) at org.apache.commons.httpclient.HttpMethodBase.readStatusLine(HttpMethodBase.java:1973) at org.apache.commons.httpclient.HttpMethodBase.readResponse(HttpMethodBase.java:1735)

HttpClient 4：

连接超时：

读取超时：

HttpClient 3：

连接超时：

读取超时：

     ok，以后再写httpClient这两个超时时间一定要加上，不加就很可能悲剧的了