在try/catch块中捕获异常后继续执行循环

Question

            try {
                loop: while (iterator.hasNext())  // as excetion is on this line excetion will be catch by catch_2
                {
                    try {
                        Result res = (Result) iterator.next();
                        list.add(res);
                    } catch (Exception e) {                    // catch_1
                        e.printStackTrace();
                    }
                }
            } catch (Exception e) {                            // catch_2
                // goto start of the loop
                continue loop;
            }

Iterator<UserProvisioning> iterator = beans.iterator();
            while (iterator.hasNext()) {
                try {
                    UserProvisioning userProvisioning = (UserProvisioning) iterator.next();
                    System.out.println(userProvisioning.getFIRST_NAME());
                    list.add(userProvisioning);
                } catch (Exception e) {
                    // TODO Auto-generated catch block
                    logger.error("Error occured...)
                }
            }

java.lang.RuntimeException: com.opencsv.exceptions.CsvRequiredFieldEmptyException: Number of data fields does not match number of headers.

EDITiterator.hasnext()应该返回true或false，但它的抛出错误

Answer 1

如果在循环中放置一个try-catch块，它将继续循环到最后，除非您跳出它

for(Iterator<UserProvisioning> iter = beans.iterator(); iter.hasNext();) {
  try{
    UserProvisioning userProvisioning = iter.next();
    System.out.println(userProvisioning.getFIRST_NAME());
    list.add(userProvisioning);
  } catch(Exception ex) {
    logger.warn("An issue occurred when looping through user provisionings: " + ex.getMessage());

  }
}

上面的代码将设置一个迭代器并循环遍历它。如果发生异常，它将记录并继续循环，因为没有调用break。

另外，由于您知道迭代器是什么类型，所以在调用iter.next()时不需要强制转换它