https://blog.margrop.net/en/tag/spring/ Recent content in Spring on Margrop Blog Hugo -- gohugo.io en-US Sun, 12 Mar 2023 20:20:01 +0800 https://blog.margrop.net/en/post/fix-spring2-allowed-origins-error/ Sun, 12 Mar 2023 20:20:01 +0800 https://blog.margrop.net/en/post/fix-spring2-allowed-origins-error/ <h1 id="exception-message">Exception Message:</h1> <pre tabindex="0"><code>When allowCredentials is true, allowedOrigins cannot contain the special value &#34;*&#34; since that cannot be set on the &#34;Access-Control-Allow-Origin&#34; response header. To allow credentials to a set of origins, list them explicitly or consider using &#34;allowedOriginPatterns&#34; instead. </code></pre><h1 id="solution">Solution:</h1> <p>CORS configuration error, simply replace <code>.allowedOrigins</code> with <code>.allowedOriginPatterns</code>.</p> https://blog.margrop.net/en/post/fix-springfox-documentation-plugins-bootstrapper-npe/ Sun, 12 Mar 2023 17:56:57 +0800 https://blog.margrop.net/en/post/fix-springfox-documentation-plugins-bootstrapper-npe/ <h1 id="error-message">Error Message:</h1> <pre tabindex="0"><code>Failed to start bean &#39;documentationPluginsBootstrapper&#39;; nested exception is java.lang.NullPointerException </code></pre><h1 id="root-cause-analysis">Root Cause Analysis:</h1> <p><code>SpringFox</code> 3.0.0 is not compatible with <code>SpringBoot</code> 2.6.4</p> <h1 id="solution">Solution:</h1> <ul> <li>Reference Links <a href="https://stackoverflow.com/questions/40241843/failed-to-start-bean-documentationpluginsbootstrapper-in-spring-data-rest">https://stackoverflow.com/questions/40241843/failed-to-start-bean-documentationpluginsbootstrapper-in-spring-data-rest</a> <a href="https://github.com/springfox/springfox/issues/3462#issuecomment-1010721223">https://github.com/springfox/springfox/issues/3462#issuecomment-1010721223</a></li> </ul> https://blog.margrop.net/en/post/java-spring-boot-jni-java-native-interface-library-loader/ Sat, 27 Mar 2021 16:37:31 +0800 https://blog.margrop.net/en/post/java-spring-boot-jni-java-native-interface-library-loader/ <p>Because Java needs to stay cross-platform, I wrote a cross-platform JNI native library loader.</p> <h1 id="simple-implementation">Simple Implementation</h1> <ol> <li>Determine whether the current system is <code>Windows</code>, <code>Linux</code>, or <code>MacOS</code> from the <code>os.name</code> environment property.</li> <li>If it is <code>Linux</code>, further determine whether it is <code>CentOS</code> or <code>Debian</code>.</li> <li>Read the library files inside the jar package.</li> <li>Filter the matching platform library files by file suffix: <code>dll</code>, <code>so</code>, <code>jnilib</code>, and <code>dylib</code>.</li> <li>Copy the current platform&rsquo;s library file to the system temporary directory <code>java.io.tmpdir</code>.</li> <li>Load the library using <code>System.load</code>.</li> </ol> https://blog.margrop.net/en/post/spring-aop-annotation-and-within/ Thu, 14 Jan 2021 15:29:41 +0800 https://blog.margrop.net/en/post/spring-aop-annotation-and-within/ Instructions for scanning specific annotations in AOP: (1) @annotation: intercepts all methods annotated with the target annotation. (2) @within: intercepts all classes annotated with the target annotation. (3) within: limits the package scope to scan. Code Demo @Aspect @Component @Order(10) public class BidAuthorityProxy { /** * Scan classes under the specified package that are annotated with `@EnableRoleAuthority`. */ @Around(&#34;@within(com.core.annotation.EnableRoleAuthority) &amp;&amp; within(com.bid..*)&#34;) public Object verifyRoleExecuteCommand(ProceedingJoinPoint pjp) throws Throwable { // Get the intercepted method MethodSignature msig = (MethodSignature) pjp.