标签：ide target oss ima eve print numbers this quic
In the example we have currently:
@Component public class BinarySearchImpl { @Autowired private SortAlgo sortAlgo; public int binarySearch(int [] numbers, int target) { // Sorting an array sortAlgo.sort(numbers); System.out.println(sortAlgo); // Quick sort // Return the result return 3; } }
@Component @Primary public class QuickSortAlgo implements SortAlgo{ public int[] sort(int[] numbers) { return numbers; } } @Component public class BubbleSortAlgo implements SortAlgo{ public int[] sort(int[] numbers) { return numbers; } }
The way we do Autowired is by ‘@Primary‘ decorator.
It is clear that one implementation detail is the best, then we should consider to use @Primary to do the autowiring
It is also possible to autowiring by name:
// Change From @Autowired private SortAlgo sortAlgo; // Change to @Autowired private SortAlgo quickSortAlgo
We changed it to using ‘quickSortAlgo‘, even we remove the @Primary from ‘QuickSortAlgo‘, it still works as the same.
@Component // @Primary public class QuickSortAlgo implements SortAlgo{ public int[] sort(int[] numbers) { return numbers; } }
@Qualifier(‘‘)
Instead of using naming, we can use @Qualifier() to tell which one we want to autowired.
@Component @Primary @Qualifier("quick") public class QuickSortAlgo implements SortAlgo{ public int[] sort(int[] numbers) { return numbers; } } @Component @Qualifier("bubble") public class BubbleSortAlgo implements SortAlgo{ public int[] sort(int[] numbers) { return numbers; } }
@Autowired @Qualifier("bubble") private SortAlgo sortAlgo;
In this case, it will use ‘BubbleSortAlgo‘.
So we can say that
@Qualifier > @Primary > @naming
[Spring boot] Autowired by name, by @Primary or by @Qualifier
标签：ide target oss ima eve print numbers this quic
原文地址：https://www.cnblogs.com/Answer1215/p/10656452.html
