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Spring???????Bean?????????????????????????Bean???????@Autowired???????????????????????????

1. ????????

Spring????Bean??????????????????????Bean????????@Autowired??????????????????????????????????????????????

2. autowireConstructor????????

autowireConstructor?????????????????????Bean????????

• ctors != null?????????@Autowired??????????
• mbd.getResolvedAutowireMode() == AUTOWIRE_CONSTRUCTOR?????????????????

2.1 ctors != null ???

• ??????????@Autowired????????????????????????????Bean?
• ?????????????@Autowired???????@Autowired????????
• ????????????@Autowired(required=false)??????????????????????????????????????

2.2 mbd.getResolvedAutowireMode() == AUTOWIRE_CONSTRUCTOR ???

• ???????????@Autowired???????????????
• ????????@Autowired??????????????????????????????????????

3. ?????????

???????????

• ??????????????????
• ????????????????????????Bean?

4. ?????????

???????

• ??????????????????
• ?????????????????

???????????Spring?????????????

5. ????

?????????????????????Spring???UnsatisfiedDependencyException??????????????????????????????????

6. ??

??Spring?????????

????????????????Spring??????????Bean???????

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