From 0c4be85467b9ee2988fce4a18af55443c7320058 Mon Sep 17 00:00:00 2001
From: John Niang <johnniang@foxmail.com>
Date: Tue, 20 May 2025 10:05:25 +0800
Subject: [PATCH] Set Java 21 as minimal version (#7451)
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#### What type of PR is this?

/kind improvement
/area core
/milestone 2.21.x

#### What this PR does / why we need it:

This PR sets Java 21 as minimal version. After doing that, Halo can only run on Java 21 or newer version.

Fortunately, all plugins and themes won't be affected by the restriction.

> https://docs.gradle.org/current/userguide/toolchains.html#sec:release-flag-toolchain

#### Which issue(s) this PR fixes:

Fixes https://github.com/halo-dev/halo/issues/6867

#### Does this PR introduce a user-facing change?

```release-note
[Action Required] 更新最低运行环境为 Java 21
```
---
 .github/actions/setup-env/action.yaml |  2 +-
 api/build.gradle                      | 10 ++++++++--
 application/build.gradle              | 12 ++++++++----
 3 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/.github/actions/setup-env/action.yaml b/.github/actions/setup-env/action.yaml
index b373b759f..182f3da40 100644
--- a/.github/actions/setup-env/action.yaml
+++ b/.github/actions/setup-env/action.yaml
@@ -15,7 +15,7 @@ inputs:
   java-version:
     description: Java version.
     required: false
-    default: "17"
+    default: "21"
 
 runs:
   using: "composite"
diff --git a/api/build.gradle b/api/build.gradle
index 7095daa57..adddf4269 100644
--- a/api/build.gradle
+++ b/api/build.gradle
@@ -9,9 +9,15 @@ plugins {
 group = 'run.halo.app'
 description = 'API of halo project, connecting by other projects.'
 
+tasks.withType(JavaCompile).configureEach {
+    options.release = 21
+    options.encoding = 'UTF-8'
+}
+
 java {
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(21)
+    }
 }
 
 compileJava.options.encoding = "UTF-8"
diff --git a/application/build.gradle b/application/build.gradle
index 73f328e9d..d58523af8 100644
--- a/application/build.gradle
+++ b/application/build.gradle
@@ -17,12 +17,16 @@ plugins {
 }
 
 group = 'run.halo.app'
-compileJava.options.encoding = 'UTF-8'
-compileTestJava.options.encoding = 'UTF-8'
+
+tasks.withType(JavaCompile).configureEach {
+    options.release = 21
+    options.encoding = 'UTF-8'
+}
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(21)
+    }
 }
 
 idea {