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This article introduces what are the points for attention of Java 11 compatible old projects, the content is very detailed, interested friends can refer to, I hope it can be helpful to you.

As we all know, Oracle's Java8 has been disabled, and Java11 is the next LTS version. I plan to upgrade some old projects to Java11 in the near future. Write down some compatibility issues that need to be paid attention to here.

Javax.xml.bind.JAXBException ClassNotFound problem

JAXB api, the API of java EE, was no longer included in java SE 9, and the solution that was bundled together in the 6-7-8's was to add jar packages manually. If you are using maven, you can add the following dependencies

Javax.xml.bind jaxb-api 2.2.11 com.sun.xml.bind jaxb-impl 2.2.11 com.sun.xml.bind jaxb-core 2.2.11 javax.activation activation 1.1.1

Java.lang.NoClassDefFoundError: javax/xml/ws/EndpointReference exception

The cause of the problem is the same as described in point 1 above. It is separated from java9 and can be introduced separately.

Javax.xml.ws jaxws-api 2.2.12

About NoClassDefFound exceptions of com.sun.image.codes-related packages

There seems to be no solution to this problem. I haven't found a replacement package from the maven warehouse for a long time. Of course, this seems to be because this is sun's own API. If you are using openjdk, then the problem will be solved. If you are unfortunately using oracle's JDK, then change the related class, use java's imageIO-related API, or replace the dependent components.

NoClassDefFound exception of WebService related package

Introduce the following packages to solve the problem

Javax.xml.ws jaxws-api 2.2.12 javax.jws javax.jws-api 1.1 notes on Java 11 compatibility with old projects are shared here, I hope the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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