特殊：spring boot 4.x 适配。目前编译通过，卡点是：

1、多数据源：需要 spring boot 4.x 适配
2. 数据源：需要 druid spring boot 4.x 适配

pom.xml

@@ -42,7 +42,7 @@
         <flatten-maven-plugin.version>1.7.2</flatten-maven-plugin.version>
         <!-- maven-surefire-plugin 暂时无法通过 bom 的依赖读取（兼容老版本 IDEA 2024 及以前版本） -->
         <lombok.version>1.18.42</lombok.version>
-        <spring.boot.version>3.5.5</spring.boot.version>
+        <spring.boot.version>4.0.0</spring.boot.version>
         <mapstruct.version>1.6.3</mapstruct.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>

yudao-dependencies/pom.xml

@@ -17,7 +17,7 @@
         <revision>2025.11-SNAPSHOT</revision>
         <flatten-maven-plugin.version>1.7.2</flatten-maven-plugin.version>
         <!-- 统一依赖管理 -->
-        <spring.boot.version>3.5.8</spring.boot.version>
+        <spring.boot.version>4.0.0</spring.boot.version>
         <!-- Web 相关 -->
         <springdoc.version>2.8.14</springdoc.version>
         <knife4j.version>4.5.0</knife4j.version>
@@ -130,6 +130,16 @@
                 <artifactId>spring-boot-configuration-processor</artifactId>
                 <version>${spring.boot.version}</version>
             </dependency>
+            <dependency>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-starter-aspectj</artifactId>
+                <version>${spring.boot.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-jackson2</artifactId>
+                <version>${spring.boot.version}</version>
+            </dependency>
 
             <!-- Web 相关 -->
             <dependency>

yudao-framework/yudao-common/src/main/java/cn/iocoder/yudao/framework/common/util/servlet/ServletUtils.java

@@ -26,10 +26,10 @@ public class ServletUtils {
      * @param response 响应
      * @param object   对象，会序列化成 JSON 字符串
      */
-    @SuppressWarnings("deprecation") // 必须使用 APPLICATION_JSON_UTF8_VALUE，否则会乱码
     public static void writeJSON(HttpServletResponse response, Object object) {
         String content = JsonUtils.toJsonString(object);
-        JakartaServletUtil.write(response, content, MediaType.APPLICATION_JSON_UTF8_VALUE);
+        // TODO @芋艿：【springboot4.0】看看有没优化空间？
+        JakartaServletUtil.write(response, content, MediaType.APPLICATION_JSON_VALUE + ";charset=UTF-8");
     }
 
     /**

yudao-framework/yudao-spring-boot-starter-monitor/pom.xml

@@ -24,7 +24,7 @@
         <!-- Spring 核心 -->
         <dependency>
             <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-aop</artifactId>
+            <artifactId>spring-boot-starter-aspectj</artifactId>
         </dependency>
 
         <!-- Web 相关 -->

yudao-framework/yudao-spring-boot-starter-monitor/src/main/java/cn/iocoder/yudao/framework/tracer/config/YudaoMetricsAutoConfiguration.java

@@ -2,7 +2,7 @@ package cn.iocoder.yudao.framework.tracer.config;
 
 import io.micrometer.core.instrument.MeterRegistry;
 import org.springframework.beans.factory.annotation.Value;
-import org.springframework.boot.actuate.autoconfigure.metrics.MeterRegistryCustomizer;
+import org.springframework.boot.micrometer.metrics.autoconfigure.MeterRegistryCustomizer;
 import org.springframework.boot.autoconfigure.AutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;

yudao-framework/yudao-spring-boot-starter-redis/src/main/java/cn/iocoder/yudao/framework/redis/config/YudaoCacheAutoConfiguration.java

@@ -3,7 +3,7 @@ package cn.iocoder.yudao.framework.redis.config;
 import cn.hutool.core.util.StrUtil;
 import cn.iocoder.yudao.framework.redis.core.TimeoutRedisCacheManager;
 import org.springframework.boot.autoconfigure.AutoConfiguration;
-import org.springframework.boot.autoconfigure.cache.CacheProperties;
+import org.springframework.boot.cache.autoconfigure.CacheProperties;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.cache.annotation.EnableCaching;
 import org.springframework.context.annotation.Bean;

yudao-framework/yudao-spring-boot-starter-security/pom.xml

@@ -27,7 +27,7 @@
         <!-- Spring 核心 -->
         <dependency>
             <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-aop</artifactId>
+            <artifactId>spring-boot-starter-aspectj</artifactId>
         </dependency>
 
         <!-- Web 相关 -->

yudao-framework/yudao-spring-boot-starter-test/src/main/java/cn/iocoder/yudao/framework/test/config/RedisTestConfiguration.java

@@ -1,7 +1,7 @@
 package cn.iocoder.yudao.framework.test.config;
 
 import com.github.fppt.jedismock.RedisServer;
-import org.springframework.boot.autoconfigure.data.redis.RedisProperties;
+import org.springframework.boot.data.redis.autoconfigure.DataRedisProperties;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -16,14 +16,14 @@ import java.io.IOException;
  */
 @Configuration(proxyBeanMethods = false)
 @Lazy(false) // 禁止延迟加载
-@EnableConfigurationProperties(RedisProperties.class)
+@EnableConfigurationProperties(DataRedisProperties.class)
 public class RedisTestConfiguration {
 
     /**
      * 创建模拟的 Redis Server 服务器
      */
     @Bean
-    public RedisServer redisServer(RedisProperties properties) throws IOException {
+    public RedisServer redisServer(DataRedisProperties properties) throws IOException {
         RedisServer redisServer = new RedisServer(properties.getPort());
         // 一次执行多个单元测试时，貌似创建多个 spring 容器，导致不进行 stop。这样，就导致端口被占用，无法启动。。。
         try {

yudao-framework/yudao-spring-boot-starter-test/src/main/java/cn/iocoder/yudao/framework/test/config/SqlInitializationTestConfiguration.java

@@ -3,7 +3,7 @@ package cn.iocoder.yudao.framework.test.config;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnSingleCandidate;
-import org.springframework.boot.autoconfigure.sql.init.SqlInitializationProperties;
+import org.springframework.boot.sql.autoconfigure.init.SqlInitializationProperties;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.boot.jdbc.init.DataSourceScriptDatabaseInitializer;
 import org.springframework.boot.sql.init.AbstractScriptDatabaseInitializer;

yudao-framework/yudao-spring-boot-starter-test/src/main/java/cn/iocoder/yudao/framework/test/core/ut/BaseDbAndRedisUnitTest.java

@@ -9,9 +9,9 @@ import cn.iocoder.yudao.framework.test.config.SqlInitializationTestConfiguration
 import com.alibaba.druid.spring.boot3.autoconfigure.DruidDataSourceAutoConfigure;
 import com.baomidou.mybatisplus.autoconfigure.MybatisPlusAutoConfiguration;
 import org.redisson.spring.starter.RedissonAutoConfiguration;
-import org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration;
-import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
-import org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration;
+import org.springframework.boot.data.redis.autoconfigure.DataRedisAutoConfiguration;
+import org.springframework.boot.jdbc.autoconfigure.DataSourceAutoConfiguration;
+import org.springframework.boot.jdbc.autoconfigure.DataSourceTransactionManagerAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.context.annotation.Import;
 import org.springframework.test.context.ActiveProfiles;
@@ -43,7 +43,7 @@ public class BaseDbAndRedisUnitTest {
             // Redis 配置类
             RedisTestConfiguration.class, // Redis 测试配置类，用于启动 RedisServer
             YudaoRedisAutoConfiguration.class, // 自己的 Redis 配置类
-            RedisAutoConfiguration.class, // Spring Redis 自动配置类
+            DataRedisAutoConfiguration.class, // Spring Redis 自动配置类
             RedissonAutoConfiguration.class, // Redisson 自动配置类
 
             // 其它配置类

yudao-framework/yudao-spring-boot-starter-test/src/main/java/cn/iocoder/yudao/framework/test/core/ut/BaseDbUnitTest.java

@@ -7,8 +7,8 @@ import cn.iocoder.yudao.framework.test.config.SqlInitializationTestConfiguration
 import com.alibaba.druid.spring.boot3.autoconfigure.DruidDataSourceAutoConfigure;
 import com.baomidou.mybatisplus.autoconfigure.MybatisPlusAutoConfiguration;
 import com.github.yulichang.autoconfigure.MybatisPlusJoinAutoConfiguration;
-import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
-import org.springframework.boot.autoconfigure.jdbc.DataSourceTransactionManagerAutoConfiguration;
+import org.springframework.boot.jdbc.autoconfigure.DataSourceAutoConfiguration;
+import org.springframework.boot.jdbc.autoconfigure.DataSourceTransactionManagerAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.context.annotation.Import;
 import org.springframework.test.context.ActiveProfiles;

yudao-framework/yudao-spring-boot-starter-test/src/main/java/cn/iocoder/yudao/framework/test/core/ut/BaseRedisUnitTest.java

@@ -4,7 +4,7 @@ import cn.hutool.extra.spring.SpringUtil;
 import cn.iocoder.yudao.framework.redis.config.YudaoRedisAutoConfiguration;
 import cn.iocoder.yudao.framework.test.config.RedisTestConfiguration;
 import org.redisson.spring.starter.RedissonAutoConfiguration;
-import org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration;
+import org.springframework.boot.data.redis.autoconfigure.DataRedisAutoConfiguration;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.context.annotation.Import;
 import org.springframework.test.context.ActiveProfiles;
@@ -23,7 +23,7 @@ public class BaseRedisUnitTest {
     @Import({
             // Redis 配置类
             RedisTestConfiguration.class, // Redis 测试配置类，用于启动 RedisServer
-            RedisAutoConfiguration.class, // Spring Redis 自动配置类
+            DataRedisAutoConfiguration.class, // Spring Redis 自动配置类
             YudaoRedisAutoConfiguration.class, // 自己的 Redis 配置类
             RedissonAutoConfiguration.class, // Redisson 自动配置类
 

yudao-framework/yudao-spring-boot-starter-web/pom.xml

@@ -26,6 +26,15 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-jackson2</artifactId>
+        </dependency>
+        <!-- TODO @芋艿：【springboot4.0】看看是不是要去掉？？？ -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-restclient</artifactId>
+        </dependency>
         <!-- spring boot 配置所需依赖 -->
         <dependency>
             <groupId>org.springframework.boot</groupId>

yudao-framework/yudao-spring-boot-starter-web/src/main/java/cn/iocoder/yudao/framework/jackson/config/YudaoJacksonAutoConfiguration.java

@@ -13,15 +13,16 @@ import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
 import com.fasterxml.jackson.datatype.jsr310.ser.LocalTimeSerializer;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.boot.autoconfigure.AutoConfiguration;
-import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
-import org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration;
+import org.springframework.boot.jackson2.autoconfigure.Jackson2AutoConfiguration;
+import org.springframework.boot.jackson2.autoconfigure.Jackson2ObjectMapperBuilderCustomizer;
 import org.springframework.context.annotation.Bean;
 
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.LocalTime;
 
-@AutoConfiguration(after = JacksonAutoConfiguration.class)
+// TODO @芋艿：【springboot4.0】这里可能要调整？？？
+@AutoConfiguration(after = Jackson2AutoConfiguration.class)
 @Slf4j
 public class YudaoJacksonAutoConfiguration {
 

yudao-framework/yudao-spring-boot-starter-web/src/main/java/cn/iocoder/yudao/framework/web/config/YudaoWebAutoConfiguration.java

@@ -14,10 +14,10 @@ import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.autoconfigure.AutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
-import org.springframework.boot.autoconfigure.web.client.RestTemplateAutoConfiguration;
-import org.springframework.boot.autoconfigure.web.servlet.WebMvcRegistrations;
+import org.springframework.boot.restclient.autoconfigure.RestTemplateAutoConfiguration;
+import org.springframework.boot.webmvc.autoconfigure.WebMvcRegistrations;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
-import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.boot.restclient.RestTemplateBuilder;
 import org.springframework.boot.web.servlet.FilterRegistrationBean;
 import org.springframework.context.annotation.Bean;
 import org.springframework.core.annotation.Order;

yudao-framework/yudao-spring-boot-starter-web/src/main/java/cn/iocoder/yudao/framework/xss/config/YudaoXssAutoConfiguration.java

@@ -9,7 +9,7 @@ import org.springframework.boot.autoconfigure.AutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
-import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
+import org.springframework.boot.jackson2.autoconfigure.Jackson2ObjectMapperBuilderCustomizer;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.boot.web.servlet.FilterRegistrationBean;
 import org.springframework.context.annotation.Bean;
@@ -34,6 +34,7 @@ public class YudaoXssAutoConfiguration implements WebMvcConfigurer {
         return new JsoupXssCleaner();
     }
 
+    // TODO @芋艿：【springboot4.0】这里可能要调整？？？
     /**
      * 注册 Jackson 的序列化器，用于处理 json 类型参数的 xss 过滤
      *