feat: 新增 package-info.java 并初步集成 JSpecify

- 添加 JSpecify 依赖到 pom.xml
- 创建 validator/package-info.java
- 创建 function/package-info.java
- 添加 @Nullable 注解到核心接口和类

.gitignore

@@ -4,8 +4,6 @@ target/
 !**/src/main/**/target/
 !**/src/test/**/target/
 
-.flattened-pom.xml
-
 ### STS ###
 .apt_generated
 .classpath

plusone-validator/pom.xml

@@ -9,7 +9,6 @@
     <groupId>xyz.zhouxy.plusone</groupId>
     <artifactId>plusone-validator-parent</artifactId>
     <version>1.0.0-SNAPSHOT</version>
-    <relativePath>../pom.xml</relativePath>
   </parent>
 
   <artifactId>plusone-validator</artifactId>
@@ -19,11 +18,37 @@
     Plusone Validator 是一个校验库，使用 lambda 表达式（包括方法引用）和流式 API 构建校验规则，对对象进行校验。
   </description>
 
+  <licenses>
+    <license>
+      <name>Apache License, Version 2.0</name>
+      <url>https://www.apache.org/licenses/LICENSE-2.0</url>
+      <distribution>repo</distribution>
+    </license>
+  </licenses>
+
+  <developers>
+    <developer>
+      <name>Zhou Xingyi (周兴毅)</name>
+      <url>https://gitea.zhouxy.xyz/plusone</url>
+    </developer>
+  </developers>
+
+  <scm>
+    <connection>scm:git:https://gitea.zhouxy.xyz/plusone/plusone-validator.git</connection>
+    <developerConnection>scm:git:ssh://gitea.zhouxy.xyz/plusone/plusone-validator.git</developerConnection>
+    <url>https://gitea.zhouxy.xyz/plusone/plusone-validator</url>
+  </scm>
+
   <dependencies>
     <dependency>
       <groupId>xyz.zhouxy.plusone</groupId>
       <artifactId>plusone-commons</artifactId>
     </dependency>
+    <dependency>
+      <groupId>org.jspecify</groupId>
+      <artifactId>jspecify</artifactId>
+      <version>1.0.0</version>
+    </dependency>
     <dependency>
       <groupId>org.junit.jupiter</groupId>
       <artifactId>junit-jupiter</artifactId>

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/ArrayPropertyValidator.java

@@ -31,7 +31,7 @@ import xyz.zhouxy.plusone.commons.util.AssertTools;
  *
  * @param <T> 待校验对象的类型
  * @param <E> 数组元素的类型
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 public class ArrayPropertyValidator<T, E>
         extends BasePropertyValidator<T, E[], ArrayPropertyValidator<T, E>> {

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/BaseComparablePropertyValidator.java

@@ -29,7 +29,7 @@ import com.google.common.collect.Range;
  * @param <TProperty> 待校验属性的类型，必须实现 {@code Comparable} 接口
  * @param <TPropertyValidator> 具体校验器类型，用于支持链式调用
  * @see Range
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 public abstract class BaseComparablePropertyValidator<
             T,

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/BasePropertyValidator.java

@@ -24,6 +24,8 @@ import java.util.function.Function;
 import java.util.function.Predicate;
 import java.util.function.Supplier;
 
+import org.jspecify.annotations.Nullable;
+
 /**
  * 属性校验器。包含针对属性的校验规则。
  *
@@ -33,7 +35,7 @@ import java.util.function.Supplier;
  * @param <T> 待校验对象的类型
  * @param <TProperty> 待校验属性的类型
  * @param <TPropertyValidator> 具体校验器类型，用于支持链式调用
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 public abstract class BasePropertyValidator<
         T,
@@ -135,9 +137,9 @@ public abstract class BasePropertyValidator<
     /**
      * 校验属性
      *
-     * @param obj 属性所在的对象
+     * @param obj 属性所在的对象，允许为 {@code null}
      */
-    public final void validate(T obj) {
+    public final void validate(@Nullable T obj) {
         for (Consumer<? super TProperty> consumer : consumers) {
             consumer.accept(getter.apply(obj));
         }

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/BaseValidator.java

@@ -28,13 +28,15 @@ import java.util.function.Supplier;
 
 import xyz.zhouxy.plusone.validator.function.*;
 
+import org.jspecify.annotations.Nullable;
+
 /**
  * 校验器基类
  * <p>
  * 子类可通过添加不同的校验规则，构建完整的校验逻辑，用于校验对象。
  *
  * @param <T> 待校验对象的类型
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 public abstract class BaseValidator<T> implements IValidator<T> {
 
@@ -311,7 +313,7 @@ public abstract class BaseValidator<T> implements IValidator<T> {
 
     /** {@inheritDoc} */
     @Override
-    public void validate(T obj) {
+    public void validate(@Nullable T obj) {
         this.rules.forEach(rule -> rule.accept(obj));
     }
 }

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/BoolPropertyValidator.java

@@ -27,7 +27,7 @@ import java.util.function.Supplier;
  * 用于构建校验 {@code Boolean} 类型属性的规则链。
  *
  * @param <T> 待校验对象的类型
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 public class BoolPropertyValidator<T>
         extends BasePropertyValidator<T, Boolean, BoolPropertyValidator<T>> {

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/CollectionPropertyValidator.java

@@ -32,7 +32,7 @@ import xyz.zhouxy.plusone.commons.util.AssertTools;
  *
  * @param <T> 待校验对象的类型
  * @param <E> 集合元素的类型
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 public class CollectionPropertyValidator<T, E>
         extends BasePropertyValidator<T, Collection<E>, CollectionPropertyValidator<T, E>> {

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/ComparablePropertyValidator.java

@@ -24,7 +24,7 @@ import java.util.function.Function;
  * @param <T> 待校验对象的类型
  * @param <TProperty> 待校验属性的类型，必须实现 {@code Comparable} 接口
  * @see com.google.common.collect.Range
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 public class ComparablePropertyValidator<T, TProperty extends Comparable<? super TProperty>>
         extends BaseComparablePropertyValidator<T, TProperty, ComparablePropertyValidator<T, TProperty>> {

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/DoublePropertyValidator.java

@@ -27,7 +27,7 @@ import java.util.function.Supplier;
  * 用于构建校验 {@code Double} 类型属性的规则链。
  *
  * @param <T> 待校验对象的类型
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 public class DoublePropertyValidator<T>
         extends BaseComparablePropertyValidator<T, Double, DoublePropertyValidator<T>> {

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/IValidateRequired.java

@@ -19,7 +19,7 @@ package xyz.zhouxy.plusone.validator;
 /**
  * 自带校验方法，校验不通过时直接抛异常。
  *
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  *
  * @see BaseValidator
  */

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/IValidator.java

@@ -15,6 +15,8 @@
  */
 package xyz.zhouxy.plusone.validator;
 
+import org.jspecify.annotations.Nullable;
+
 /**
  * 校验器
  *
@@ -23,14 +25,14 @@ package xyz.zhouxy.plusone.validator;
  * </p>
  *
  * @param <T> 待校验对象的类型
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 public interface IValidator<T> {
 
     /**
      * 校验指定对象是否符合预定义规则
      *
-     * @param obj 待校验的对象实例
+     * @param obj 待校验的对象实例，允许为 {@code null}
      */
-    void validate(T obj);
+    void validate(@Nullable T obj);
 }

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/IntPropertyValidator.java

@@ -27,7 +27,7 @@ import java.util.function.Supplier;
  * 用于构建校验 {@code Integer} 类型属性的规则链。
  *
  * @param <T> 待校验对象的类型
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 public class IntPropertyValidator<T>
         extends BaseComparablePropertyValidator<T, Integer, IntPropertyValidator<T>> {

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/LongPropertyValidator.java

@@ -27,7 +27,7 @@ import java.util.function.Supplier;
  * 用于构建校验 {@code Long} 类型属性的规则链。
  *
  * @param <T> 待校验对象的类型
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 public class LongPropertyValidator<T>
         extends BaseComparablePropertyValidator<T, Long, LongPropertyValidator<T>> {

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/MapValidator.java

@@ -23,13 +23,15 @@ import java.util.Set;
 import java.util.function.Function;
 import java.util.stream.Collectors;
 
+import org.jspecify.annotations.Nullable;
+
 /**
  * 对 Map 进行校验的校验器
  *
  * <p>
  * 校验后拷贝出一个新的 Map 对象，仅保留指定的 key。
  *
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 public abstract class MapValidator<K, V> extends BaseValidator<Map<K, V>> {
 
@@ -59,10 +61,10 @@ public abstract class MapValidator<K, V> extends BaseValidator<Map<K, V>> {
     /**
      * 校验并拷贝，仅保留指定 key 的属性。
      *
-     * @param obj 待校验的 map
+     * @param obj 待校验的 map，允许为 {@code null}
      * @return 拷贝后的 map
      */
-    public final Map<K, V> validateAndCopy(Map<K, V> obj) {
+    public final Map<K, V> validateAndCopy(@Nullable Map<K, V> obj) {
         return validateAndCopyInternal(obj, this.keys);
     }
 
@@ -89,7 +91,7 @@ public abstract class MapValidator<K, V> extends BaseValidator<Map<K, V>> {
         return validateAndCopyInternal(obj, Arrays.asList(keys));
     }
 
-    private final Map<K, V> validateAndCopyInternal(Map<K, V> obj, Collection<K> keys) {
+    private final Map<K, V> validateAndCopyInternal(@Nullable Map<K, V> obj, Collection<K> keys) {
         validate(obj);
         return obj.entrySet().stream()
                 .filter(kv -> keys.contains(kv.getKey()))

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/ObjectPropertyValidator.java

@@ -23,7 +23,7 @@ import java.util.function.Function;
  *
  * @param <T> 待校验对象的类型
  * @param <TProperty> 待校验属性的类型
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 public class ObjectPropertyValidator<T, TProperty>
         extends BasePropertyValidator<T, TProperty, ObjectPropertyValidator<T, TProperty>> {

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/PairPropertyValidator.java

@@ -27,7 +27,7 @@ import java.util.function.Supplier;
  * @param <T>  被验证对象类型
  * @param <V1> 第一个元素的类型
  * @param <V2> 第二个元素的类型
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 public class PairPropertyValidator<T, V1, V2>
         extends BasePropertyValidator<T, Entry<V1, V2>, PairPropertyValidator<T, V1, V2>> {

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/StringPropertyValidator.java

@@ -35,7 +35,7 @@ import xyz.zhouxy.plusone.commons.util.StringTools;
  * 用于构建校验 {@code String} 类型属性的规则链。
  *
  * @param <T> 待校验对象的类型
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 public class StringPropertyValidator<T>
         extends BaseComparablePropertyValidator<T, String, StringPropertyValidator<T>> {
@@ -547,7 +547,7 @@ public class StringPropertyValidator<T>
 
         private static Predicate<String> length(int length) {
             AssertTools.checkArgument(length >= 0,
-                "The expected length must be non-negative.");
+                    "The expected length must be non-negative.");
             return input -> input == null || input.length() == length;
         }
 

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/ValidationException.java

@@ -15,10 +15,12 @@
  */
 package xyz.zhouxy.plusone.validator;
 
+import org.jspecify.annotations.Nullable;
+
 /**
  * 校验失败异常
  *
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 public class ValidationException extends RuntimeException {
 
@@ -30,11 +32,11 @@ public class ValidationException extends RuntimeException {
         super(message);
     }
 
-    private ValidationException(Throwable cause) {
+    private ValidationException(@Nullable Throwable cause) {
         super(cause);
     }
 
-    private ValidationException(String message, Throwable cause) {
+    private ValidationException(String message, @Nullable Throwable cause) {
         super(message, cause);
     }
 
@@ -71,10 +73,10 @@ public class ValidationException extends RuntimeException {
     /**
      * 创建 {@code ValidationException} 实例
      *
-     * @param cause 导致校验失败的根本异常
+     * @param cause 导致校验失败的根本异常，允许为 {@code null}
      * @return {@code ValidationException} 实例
      */
-    public static ValidationException withCause(Throwable cause) {
+    public static ValidationException withCause(@Nullable Throwable cause) {
         return new ValidationException(cause);
     }
 
@@ -82,10 +84,10 @@ public class ValidationException extends RuntimeException {
      * 创建 {@code ValidationException} 实例
      *
      * @param message 异常信息
-     * @param cause 导致校验失败的根本异常
+     * @param cause 导致校验失败的根本异常，允许为 {@code null}
      * @return {@code ValidationException} 实例
      */
-    public static ValidationException withMessageAndCause(String message, Throwable cause) {
+    public static ValidationException withMessageAndCause(String message, @Nullable Throwable cause) {
         return new ValidationException(message, cause);
     }
 }

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/function/ToBoolObjectFunction.java

@@ -21,7 +21,7 @@ import java.util.function.Function;
 /**
  * Function<T, Boolean>
  *
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 @FunctionalInterface
 public interface ToBoolObjectFunction<T> extends Function<T, Boolean>, Serializable {

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/function/ToDoubleObjectFunction.java

@@ -21,7 +21,7 @@ import java.util.function.Function;
 /**
  * Function<T, Double>
  *
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 @FunctionalInterface
 public interface ToDoubleObjectFunction<T> extends Function<T, Double>, Serializable {

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/function/ToIntegerFunction.java

@@ -21,7 +21,7 @@ import java.util.function.Function;
 /**
  * Function<T, Integer>
  *
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 @FunctionalInterface
 public interface ToIntegerFunction<T> extends Function<T, Integer>, Serializable {

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/function/ToLongObjectFunction.java

@@ -21,7 +21,7 @@ import java.util.function.Function;
 /**
  * Function<T, Long>
  *
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 @FunctionalInterface
 public interface ToLongObjectFunction<T> extends Function<T, Long>, Serializable {

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/function/ToStringFunction.java

@@ -21,7 +21,7 @@ import java.util.function.Function;
 /**
  * Function<T, String>
  *
- * @author ZhouXY
+ * @author ZhouXY108 <luquanlion@outlook.com>
  */
 @FunctionalInterface
 public interface ToStringFunction<T> extends Function<T, String>, Serializable {

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/function/package-info.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2025-present ZhouXY
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * 函数式接口包，提供带序列化能力的特殊 {@code Function} 子类型。
+ *
+ * <p>
+ * 本包中的接口均继承自 {@link java.util.function.Function}，同时实现
+ * {@link java.io.Serializable}，使 lambda 表达式或方法引用可以被序列化。
+ * 主要用作 {@link xyz.zhouxy.plusone.validator.BaseValidator} 中
+ * {@code ruleFor} 方法族的参数类型，以支持特定类型的属性取值。
+ *
+ * <ul>
+ *   <li>{@link xyz.zhouxy.plusone.validator.function.ToStringFunction ToStringFunction} — Function&lt;T, String&gt;</li>
+ *   <li>{@link xyz.zhouxy.plusone.validator.function.ToIntegerFunction ToIntegerFunction} — Function&lt;T, Integer&gt;</li>
+ *   <li>{@link xyz.zhouxy.plusone.validator.function.ToLongObjectFunction ToLongObjectFunction} — Function&lt;T, Long&gt;</li>
+ *   <li>{@link xyz.zhouxy.plusone.validator.function.ToDoubleObjectFunction ToDoubleObjectFunction} — Function&lt;T, Double&gt;</li>
+ *   <li>{@link xyz.zhouxy.plusone.validator.function.ToBoolObjectFunction ToBoolObjectFunction} — Function&lt;T, Boolean&gt;</li>
+ * </ul>
+ */
+@NullMarked
+package xyz.zhouxy.plusone.validator.function;
+
+import org.jspecify.annotations.NullMarked;

plusone-validator/src/main/java/xyz/zhouxy/plusone/validator/package-info.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2025-present ZhouXY
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Plusone Validator 核心包，提供流式校验 API。
+ *
+ * <p>
+ * 使用 lambda 表达式（包括方法引用）和流式 API 构建校验规则，对对象进行校验。
+ * 支持校验普通对象（POJO）和 {@code Map} 对象。
+ *
+ * <h3>快速开始</h3>
+ * <pre>{@code
+ * public class PersonValidator extends BaseValidator<Person> {
+ *     public PersonValidator() {
+ *         ruleFor(Person::getName)
+ *             .notNull()
+ *             .notBlank();
+ *         ruleForInt(Person::getAge)
+ *             .gt(0);
+ *     }
+ * }
+ * }</pre>
+ *
+ * <h3>核心概念</h3>
+ * <ul>
+ *   <li>{@link xyz.zhouxy.plusone.validator.IValidator IValidator} — 校验器接口</li>
+ *   <li>{@link xyz.zhouxy.plusone.validator.BaseValidator BaseValidator} — 校验器基类，通过继承并添加规则构建校验器</li>
+ *   <li>{@link xyz.zhouxy.plusone.validator.BasePropertyValidator BasePropertyValidator} — 属性校验器基类</li>
+ *   <li>{@link xyz.zhouxy.plusone.validator.MapValidator MapValidator} — Map 校验器</li>
+ *   <li>{@link xyz.zhouxy.plusone.validator.ValidationException ValidationException} — 校验失败异常</li>
+ * </ul>
+ *
+ * @see xyz.zhouxy.plusone.validator.BaseValidator
+ * @see xyz.zhouxy.plusone.validator.MapValidator
+ */
+@NullMarked
+package xyz.zhouxy.plusone.validator;
+
+import org.jspecify.annotations.NullMarked;

pom.xml

@@ -47,7 +47,7 @@
     <maven.compiler.target>1.8</maven.compiler.target>
     <maven.compiler.source>1.8</maven.compiler.source>
 
-    <plusone-commons.version>1.1.0-RC2</plusone-commons.version>
+    <plusone-commons.version>1.1.0-SNAPSHOT</plusone-commons.version>
   </properties>
 
   <dependencyManagement>
@@ -68,68 +68,49 @@
   </dependencyManagement>
 
   <build>
-    <plugins>
-      <!-- Flatten 插件：生成包含继承信息的完整 POM 用于发布 -->
-      <plugin>
-        <groupId>org.codehaus.mojo</groupId>
-        <artifactId>flatten-maven-plugin</artifactId>
-        <version>1.6.0</version>
-        <configuration>
-          <!-- 核心配置：oss 模式专为 Sonatype/Maven Central 设计 -->
-          <!-- 它会保留 url, licenses, developers, scm, properties 等必要元素 -->
-          <flattenMode>oss</flattenMode>
-        </configuration>
-        <executions>
-          <!-- 在 process-resources 阶段生成展平的 POM -->
-          <execution>
-            <id>flatten</id>
-            <phase>process-resources</phase>
-            <goals>
-              <goal>flatten</goal>
-            </goals>
-          </execution>
-          <!-- 在 clean 阶段删除展平的 POM -->
-          <execution>
-            <id>flatten.clean</id>
-            <phase>clean</phase>
-            <goals>
-              <goal>clean</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
-    </plugins>
+    <!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
+    <pluginManagement>
+      <plugins>
+        <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
+        <plugin>
+          <artifactId>maven-clean-plugin</artifactId>
+          <version>3.1.0</version>
+        </plugin>
+        <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
+        <plugin>
+          <artifactId>maven-resources-plugin</artifactId>
+          <version>3.0.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-compiler-plugin</artifactId>
+          <version>3.8.0</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-surefire-plugin</artifactId>
+          <version>2.22.1</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-jar-plugin</artifactId>
+          <version>3.0.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-install-plugin</artifactId>
+          <version>2.5.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-deploy-plugin</artifactId>
+          <version>2.8.2</version>
+        </plugin>
+        <!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
+        <plugin>
+          <artifactId>maven-site-plugin</artifactId>
+          <version>3.7.1</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-project-info-reports-plugin</artifactId>
+          <version>3.0.0</version>
+        </plugin>
+      </plugins>
+    </pluginManagement>
   </build>
-
-  <profiles>
-    <profile>
-      <id>release</id>
-      <build>
-        <plugins>
-          <!-- GPG -->
-          <plugin>
-            <groupId>org.apache.maven.plugins</groupId>
-            <artifactId>maven-gpg-plugin</artifactId>
-            <executions>
-              <execution>
-                <id>sign-artifacts</id>
-                <phase>verify</phase>
-                <goals>
-                  <goal>sign</goal>
-                </goals>
-              </execution>
-            </executions>
-          </plugin>
-          <plugin>
-            <groupId>org.sonatype.central</groupId>
-            <artifactId>central-publishing-maven-plugin</artifactId>
-            <extensions>true</extensions>
-            <configuration>
-              <publishingServerId>central</publishingServerId>
-            </configuration>
-          </plugin>
-        </plugins>
-      </build>
-    </profile>
-  </profiles>
 </project>