如何在一个try/catch块中捕获异常和SocketTimeOut异常

Question

我已经为URLconnection以及Parser类实现了try catch块，如下所示。

try { 
    Url uri = new Url(urlString); 
    Parser parse = new Parser(uri); 
} catch (Exception e) 
{ 
    //ignore some other exceptions 
} 
catch (SocketTimeOutException e) 
{ 
    //I want to catch this exception and do some thing or restart 
    //if it's a timeout issue. 
    //I am using a proxy for the network connection at JVM setting 
    //using setProperty  
} 

所以，我的问题是如何根据该SocketTimeOutException情况采取相应的行动，并为其他异常忽略。

感谢，

Answer 1

为Java规范说SocketTimeoutException catch子句（http://docs.oracle.com/javase/specs/jls/se7/html/jls-11.html#jls-11.2.3和http://docs.oracle.com/javase/specs/jls/se7/html/jls-14.html#jls-14.20），首先匹配，首先执行。

只需翻转你的catch子句：

try { 
Url uri = new Url(urlString); 
Parser parse = new Parser(uri); 
} catch (SocketTimeOutException e) { 
//I want to cache this ecption and do some thing or restart based 
//if its timeout issue 
//am using proxy for the network connection at JVM setting 
//using setProperty 
} catch (Exception e) { 
//ingnore some other excpetions 
} 

Answer 2

赶上SocketTimeOutException第一：

try { 
    // do stuff 
} catch (SocketTimeOutException e) { 
    // restart or do whatever you need to do 
} catch (Exception e) { 
    // do something else 
} 

Answer 3

把更具体的异常类型上面更为一般类型的，所以就把上面Exception

Answer 4

如何捕捉异常并在一个try/catch块一个了socketTimeout异常？如果您wan't到只有一个catch块，那么你可以像这样

try { 
      URI uri = new URI(urlString); 
      Parser parse = new Parser(uri); 

      } catch(Exception e) {    
       if (e instanceof SocketTimeoutException) { 
        // do something 
       } 
      }