(tomcat) branch 9.0.x updated: Add Java 28 support for JSP compilation (if JDT supports it)

This is an automated email from the ASF dual-hosted git repository.

markt-asf pushed a commit to branch 9.0.x
in repository https://gitbox.apache.org/repos/asf/tomcat.git


The following commit(s) were added to refs/heads/9.0.x by this push:
     new 1bf5917b3b Add Java 28 support for JSP compilation (if JDT supports it)
1bf5917b3b is described below

commit 1bf5917b3b0b583b5372df2c1f76b7ef713bbe33
Author: Mark Thomas <[email protected]>
AuthorDate: Wed Jul 1 14:33:09 2026 +0100

    Add Java 28 support for JSP compilation (if JDT supports it)
---
 java/org/apache/jasper/compiler/JDTCompiler.java | 11 +++++++++++
 webapps/docs/changelog.xml                       |  7 +++++++
 2 files changed, 18 insertions(+)

diff --git a/java/org/apache/jasper/compiler/JDTCompiler.java b/java/org/apache/jasper/compiler/JDTCompiler.java
index f5d5485729..1f6386b665 100644
--- a/java/org/apache/jasper/compiler/JDTCompiler.java
+++ b/java/org/apache/jasper/compiler/JDTCompiler.java
@@ -379,6 +379,11 @@ public class JDTCompiler extends org.apache.jasper.compiler.Compiler {
                 // May be supported in a snapshot build.
                 // This is checked against the actual version below.
                 settings.put(CompilerOptions.OPTION_Source, "27");
+            } else if (opt.equals("28")) {
+                // Constant not available in latest ECJ version shipped with
+                // Tomcat. May be supported in a snapshot build.
+                // This is checked against the actual version below.
+                settings.put(CompilerOptions.OPTION_Source, "28");
             } else {
                 log.warn(Localizer.getMessage("jsp.warning.unknown.sourceVM", opt));
                 settings.put(CompilerOptions.OPTION_Source, CompilerOptions.VERSION_1_8);
@@ -503,6 +508,12 @@ public class JDTCompiler extends org.apache.jasper.compiler.Compiler {
                 // This is checked against the actual version below.
                 settings.put(CompilerOptions.OPTION_TargetPlatform, "27");
                 settings.put(CompilerOptions.OPTION_Compliance, "27");
+            } else if (opt.equals("28")) {
+                // Constant not available in latest ECJ version shipped with
+                // Tomcat. May be supported in a snapshot build.
+                // This is checked against the actual version below.
+                settings.put(CompilerOptions.OPTION_TargetPlatform, "28");
+                settings.put(CompilerOptions.OPTION_Compliance, "28");
             } else {
                 log.warn(Localizer.getMessage("jsp.warning.unknown.targetVM", opt));
                 settings.put(CompilerOptions.OPTION_TargetPlatform, CompilerOptions.VERSION_1_8);
diff --git a/webapps/docs/changelog.xml b/webapps/docs/changelog.xml
index a3364a7457..bc0b133737 100644
--- a/webapps/docs/changelog.xml
+++ b/webapps/docs/changelog.xml
@@ -179,6 +179,13 @@
       <fix>
         <bug>70135</bug>: Fix security classload regression. (remm)
       </fix>
+      <add>
+        Add support for specifying Java 28 (with the value <code>28</code>) as
+        the compiler source and/or compiler target for JSP compilation. If used
+        with an Eclipse JDT compiler version that does not support these values,
+        a warning will be logged and the default will be used.
+        (markt)
+      </add>
     </changelog>
   </subsection>
   <subsection name="WebSocket">