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This article is about how to modify and compile the source code of spring-context. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Download the source code

The first step in downloading the source code is to find a java project that uses spring-context-4.0.2.RELEASE.jar. If you do not have a ready-made project, you can download it on my git at https://github.com/zq2599/blog_demos

After downloading, you can find that there are many projects in it. The actual project used in this project is springmybatisexceptiondemo, as shown in the red box below:

Use the command line to enter the directory where pom.xml is located, execute the command mvn dependency:sources, and download the source code packages of all dependent libraries, as shown below:

At this point, go to the local warehouse of maven, find the directory of spring-context, and you can see the jar package of the source code, as shown below:

Maven's local repository, usually under the .m2 folder of the user directory

Unpack the jar package and prepare the material

In the local repository of maven, find the directory of spring-context, copy all three files of spring-context-4.0.2.RELEASE.pom,spring-context-4.0.2.RELEASE-sources.jar,spring-context-4.0.2.RELEASE.jar into a new folder, and then extract spring-context-4.0.2.RELEASE-sources.jar and spring-context-4.0.2.RELEASE.jar.

# # create a new maven project for spring-context # # create a new maven project, and the content of the pom file is exactly the same as that of spring-context-4.0.2.RELEASE.pom, as shown below:

Go to the spring-context-4.0.2.RELEASE-sources.jar folder you just unzipped, and copy the entire org folder to the java folder of the new maven project, as shown below:

Just copy the java file is not enough, but also copy the META-INF and xsd files, these things are not in the spring-context-4.0.2.RELEASE-sources.jar package, remember we just extracted the spring-context-4.0.2.RELEASE.jar file? META-INF and xsd files can be found in this unzipped folder

First, META-INF. In the decompressed directory of spring-context-4.0.2.RELEASE.jar, copy the META-INF folder to the resources folder of the new maven project, as shown below:

Next, there is the xsd file. In the decompressed directory of spring-context-4.0.2.RELEASE.jar, go to the org/springframework/cache/ configsub-directory. There are four files without the suffix class. Copy all these four files to the org/springframework/cache/config directory of the maven project source code, as shown below:

Xsd files are also available in the following directories. As in the above method, copy the xsd and gif in them to the corresponding directories in the maven project:

Org/springframework/context/config org/springframework/ejb/config org/springframework/scheduling/config org/springframework/scripting/config

Build the jar package

In the directory where the pom.xml file of the maven project you built above resides, execute the command mvn clean package-U-Dmaven.test.skip=true. After the command is executed successfully, you can see the newly built jar package in the target directory, as shown below:

So far, we have practiced the process of building the jar package of spring-context. According to the actual needs, we can modify the source code before building. For example, the following figure shows the source code of the modified CommonAnnotationBeanPostProcessor class, which is very simple, adding some output, such as printing the current cached key and the call stack of the code:

After changing the code, rebuild and generate a new spring-context-4.0.2.RELEASE.jar file. My web application was previously deployed under tomcat. Now open the lib directory of this application, replace the original file with this jar, and restart tomcat. You can see that more exception stack contents are printed on the console than before, so that we can locate the problem:

Thank you for reading! This is the end of this article on "how to modify and compile the source code of spring-context". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it out for more people to see!

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