Spring Boot2 自定義過濾器

3. 總結

我們在專案開發的時候有時候，有的需求場景可能需要自定義過濾器並指定其呼叫順序，那麼應該怎麼快速解決這個問題呢？

來看看下面的操作吧，非常的優雅，有3種方式。

用spring容器識別處理，**如下：

@component

@order(1
)@slf4j
public
class
firstfilter
implements
filter",
req.
getrequesturi()
);filterchain.
dofilter
(servletrequest, servletresponse)
;        log.
info
("committing a transaction for req : {}"
,                req.
getrequesturi()
);}}
@component
@order(2
)@slf4j
public
class
secondfilter
implements
filter",
req.
getrequesturi()
);filterchain.
dofilter
(servletrequest, servletresponse)
;        log.
info
("committing a transaction for req : {}"
,                req.
getrequesturi()
);}}

[nio-

8080
-exec-
3] com.laker.notes.easy.filter.firstfilter  : starting a transaction for req :
/[nio-
8080
-exec-
3] c.laker.notes.easy.filter.secondfilter   : starting a transaction for req :
/[nio-
8080
-exec-
3] c.laker.notes.easy.filter.secondfilter   : committing a transaction for req :
/[nio-
8080
-exec-
3] com.laker.notes.easy.filter.firstfilter  : committing a transaction for req :
/

@webfilter

("/*"
)@slf4j
public
class
secondfilter
implements
filter",
req.
getrequesturi()
);filterchain.
dofilter
(servletrequest, servletresponse)
;        log.
info
("committing a transaction for req : {}"
,                req.
getrequesturi()
);}}
@servletcomponentscan
public
class
}

@bean

public filterregistrationbean
firstfilter()
@bean
public filterregistrationbean
secondfilter()

[nio-

8080
-exec-
1] c.laker.notes.easy.filter.secondfilter   : starting a transaction for req :
/[nio-
8080
-exec-
1] com.laker.notes.easy.filter.firstfilter  : starting a transaction for req :
/[nio-
8080
-exec-
1] com.laker.notes.easy.filter.firstfilter  : committing a transaction for req :
/[nio-
8080
-exec-
1] c.laker.notes.easy.filter.secondfilter   : committing a transaction for req :
/

@order

(value = ordered.highest_precedence)
@component
@webfilter
(filtername =
"contentcachingfilter"
, urlpatterns =
"/*"
)public
class
contentcachingfilter
extends
onceperrequestfilter
}

方式執行順序

攔截請求

@component+@order()✔️

❌@webfilter+@servletcomponentscan❌

✔️filterregistrationbean✔️

✔️**繼承onceperrequestfilter **

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