java - 如何在一个 try/catch block 中捕获异常和 SocketTimeOut 异常

Question

我已经为 URLconnection 和 Parser 类实现了一个 try catch block ，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 SocketTimeOutException 情况采取相应的行动，而对于其他异常则忽略。

谢谢，

Answer 1

正如java规范所说( 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。

简单地反转你的 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
}