Web. XML Order not error

If Web. XML prompts the following error:

The content of element type "Web-app" must match "(icon?,display-name?,description?,distributable?,context-param*, Filter*,filter-mapping*,listener*,servlet*,servlet-mapping*,session-config?,mime-mapping*,welcome-file-list?, error-page*,taglib*,resource-env-ref*,resource-ref*,security-constraint*,login-config?,security-role*, env-entry*,ejb-ref*,ejb-local-ref*) "

You can try the following workarounds:

1. Remove the second line of the file <!  DOCTYPE Web-app ...  .. .. > This sentence description (not recommended)

2. Put the labels in the correct order (in the correct order), this method can sometimes solve the problem

3. Separate the pairing labels like <filter>--<filter-mapping> and <servlet>--<servlet-mapping>, i.e. all <filter > (<servlet>) is written together and all <filter-mapping> (<servlet-mapping>) are written together.

Attached: Web. XML Label Placement Order

1. Icon?

2. Display-name?

3. Description?

4. distributable?

5. context-param*

6. filter*

7. filter-mapping*

8. listener*

9. servlet*

10.servlet-mapping*

11.session-config?

12.mime-mapping*

13.welcome-file-list?

14.error-page*

15.taglib*

16.resource-env-ref*

17.resource-ref*

18.security-constraint*

19.login-config?

20.security-role*

21.env-entry*

22.ejb-ref*

23.ejb-local-ref

"?" Indicates that the label will occur up to 1 times, and "*" indicates multiple occurrences.

Web. XML Order not error