Java catch块中的链异常
我有以下java代码:Java catch块中的链异常,java,exception-handling,Java,Exception Handling,我有以下java代码: public void someMethod(){ try{ // some code which generates Exception }catch(Exception ex1) { try{ // The code inside this method can also throw some Exception myRollBackMethod
public void someMethod(){
try{
// some code which generates Exception
}catch(Exception ex1) {
try{
// The code inside this method can also throw some Exception
myRollBackMethodForUndoingSomeChanges();
}catch(Exception ex2){
// I want to add inside `ex2` the history of `ex1` too
// Surely , I cannot set cause of `ex2` as `ex1` as `ex2`
// can be caused by it's own reasons.
// I dont want `ex1` details to be lost if I just throw `ex2` from my method
}
}
}
怎么做
编辑:实际上,这发生在我的服务层,我有控制器关于日志记录的建议。因此,我不想在这里添加2个记录器。您可以通过方法
addsupprested
将ex1
添加到ex2
中被抑制的异常中,然后再重试
快速代码示例:
public static void main(final String[] args) {
try {
throw new IllegalArgumentException("Illegal Argument 1!");
} catch (final RuntimeException ex1) {
try {
throw new IllegalStateException("Illegal State 2!");
} catch (final RuntimeException ex2) {
ex2.addSuppressed(ex1);
throw ex2;
}
}
}
将生成异常输出:
Exception in thread "main" java.lang.IllegalStateException: Illegal State 2!
at package.main(Main.java:26)
Suppressed: java.lang.IllegalArgumentException: Illegal Argument 1!
at package.main(Main.java:20)
您可以通过方法
addsupprested
将ex1
添加到ex2
中被抑制的异常中,然后再重试
快速代码示例:
public static void main(final String[] args) {
try {
throw new IllegalArgumentException("Illegal Argument 1!");
} catch (final RuntimeException ex1) {
try {
throw new IllegalStateException("Illegal State 2!");
} catch (final RuntimeException ex2) {
ex2.addSuppressed(ex1);
throw ex2;
}
}
}
将生成异常输出:
Exception in thread "main" java.lang.IllegalStateException: Illegal State 2!
at package.main(Main.java:26)
Suppressed: java.lang.IllegalArgumentException: Illegal Argument 1!
at package.main(Main.java:20)
为什么不能直接抛出
ex2
,还有什么原因要抛出ex1
?如果确实需要,您可以在ex2
中添加一个附加属性rootCause
,并在需要时使用ex1
对其进行初始化。不要捕获运行时异常-它们表明您作为开发人员做了错事。相反,确定是什么导致代码在运行时中断并修复它。看,我已经编辑了这个问题。为什么你不能直接抛出ex2
,你也有理由抛出ex1
?如果确实需要,您可以在ex2
中添加一个附加属性rootCause
,并在需要时使用ex1
对其进行初始化。不要捕获运行时异常-它们表明您作为开发人员做了错事。相反,确定是什么导致代码在运行时中断并修复它。看,我已经编辑了这个问题。