Spring 面试篇核心知识点与实战解析Spring 框架是 Java 开发中不可或缺的核心技术栈之一面试中常涉及其核心概念、设计思想及实际应用。以下从依赖注入、AOP、事务管理等关键点展开结合代码示例解析高频面试问题。依赖注入DI与控制反转IoCSpring 的核心思想是通过 IoC 容器管理对象生命周期和依赖关系。依赖注入是实现 IoC 的主要方式常见注入方式包括构造器注入和属性注入。// 构造器注入示例 Service public class UserService { private final UserRepository userRepository; Autowired public UserService(UserRepository userRepository) { this.userRepository userRepository; } } // 属性注入示例不推荐易导致循环依赖 Service public class OrderService { Autowired private OrderRepository orderRepository; }面试问题示例Autowired和Resource的区别Autowired按类型注入默认要求依赖存在Resource按名称注入支持 JDK 原生注解。AOP 编程与动态代理Spring AOP 通过动态代理实现横切关注点如日志、事务的模块化。JDK 动态代理和 CGLIB 是两种实现方式。Aspect Component public class LoggingAspect { Before(execution(* com.example.service.*.*(..))) public void logMethodCall(JoinPoint joinPoint) { System.out.println(Method called: joinPoint.getSignature()); } }关键点默认使用 JDK 动态代理需接口若无接口则切换为 CGLIB。EnableAspectJAutoProxy(proxyTargetClass true)强制使用 CGLIB。事务管理机制Spring 事务基于 AOP 实现提供声明式事务Transactional和编程式事务TransactionTemplate。Service public class PaymentService { Transactional(rollbackFor Exception.class) public void transfer(Account from, Account to, double amount) { from.debit(amount); to.credit(amount); } }常见陷阱事务失效场景同类方法调用、非 public 方法、异常被捕获。传播行为PROPAGATION_REQUIRED默认表示当前有事务则加入无则新建。Spring Bean 生命周期Bean 的生命周期由 Spring 容器管理关键阶段包括实例化、属性填充、初始化、销毁。Component public class CustomBean implements InitializingBean, DisposableBean { Override public void afterPropertiesSet() { System.out.println(初始化逻辑); } Override public void destroy() { System.out.println(销毁逻辑); } }扩展点PostConstruct和PreDestroy注解。BeanPostProcessor接口可干预 Bean 的初始化前后。Spring MVC 流程解析请求处理流程涉及DispatcherServlet、处理器映射、视图解析等组件。RestController RequestMapping(/api) public class UserController { GetMapping(/users/{id}) public ResponseEntityUser getUser(PathVariable Long id) { return ResponseEntity.ok(userService.findById(id)); } }高频问题ControllervsRestController后者直接返回 JSON等价于ControllerResponseBody。参数绑定RequestParam、PathVariable、RequestBody的区别。Spring Boot 自动配置原理自动配置通过EnableAutoConfiguration触发基于条件化配置Conditional实现。Configuration ConditionalOnClass(DataSource.class) public class DataSourceAutoConfiguration { Bean ConditionalOnMissingBean public DataSource dataSource() { return new HikariDataSource(); } 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Spring面试必问核心知识点精讲
Spring 面试篇核心知识点与实战解析Spring 框架是 Java 开发中不可或缺的核心技术栈之一面试中常涉及其核心概念、设计思想及实际应用。以下从依赖注入、AOP、事务管理等关键点展开结合代码示例解析高频面试问题。依赖注入DI与控制反转IoCSpring 的核心思想是通过 IoC 容器管理对象生命周期和依赖关系。依赖注入是实现 IoC 的主要方式常见注入方式包括构造器注入和属性注入。// 构造器注入示例 Service public class UserService { private final UserRepository userRepository; Autowired public UserService(UserRepository userRepository) { this.userRepository userRepository; } } // 属性注入示例不推荐易导致循环依赖 Service public class OrderService { Autowired private OrderRepository orderRepository; }面试问题示例Autowired和Resource的区别Autowired按类型注入默认要求依赖存在Resource按名称注入支持 JDK 原生注解。AOP 编程与动态代理Spring AOP 通过动态代理实现横切关注点如日志、事务的模块化。JDK 动态代理和 CGLIB 是两种实现方式。Aspect Component public class LoggingAspect { Before(execution(* com.example.service.*.*(..))) public void logMethodCall(JoinPoint joinPoint) { System.out.println(Method called: joinPoint.getSignature()); } }关键点默认使用 JDK 动态代理需接口若无接口则切换为 CGLIB。EnableAspectJAutoProxy(proxyTargetClass true)强制使用 CGLIB。事务管理机制Spring 事务基于 AOP 实现提供声明式事务Transactional和编程式事务TransactionTemplate。Service public class PaymentService { Transactional(rollbackFor Exception.class) public void transfer(Account from, Account to, double amount) { from.debit(amount); to.credit(amount); } }常见陷阱事务失效场景同类方法调用、非 public 方法、异常被捕获。传播行为PROPAGATION_REQUIRED默认表示当前有事务则加入无则新建。Spring Bean 生命周期Bean 的生命周期由 Spring 容器管理关键阶段包括实例化、属性填充、初始化、销毁。Component public class CustomBean implements InitializingBean, DisposableBean { Override public void afterPropertiesSet() { System.out.println(初始化逻辑); } Override public void destroy() { System.out.println(销毁逻辑); } }扩展点PostConstruct和PreDestroy注解。BeanPostProcessor接口可干预 Bean 的初始化前后。Spring MVC 流程解析请求处理流程涉及DispatcherServlet、处理器映射、视图解析等组件。RestController RequestMapping(/api) public class UserController { GetMapping(/users/{id}) public ResponseEntityUser getUser(PathVariable Long id) { return ResponseEntity.ok(userService.findById(id)); } }高频问题ControllervsRestController后者直接返回 JSON等价于ControllerResponseBody。参数绑定RequestParam、PathVariable、RequestBody的区别。Spring Boot 自动配置原理自动配置通过EnableAutoConfiguration触发基于条件化配置Conditional实现。Configuration ConditionalOnClass(DataSource.class) public class DataSourceAutoConfiguration { Bean ConditionalOnMissingBean public DataSource dataSource() { return new HikariDataSource(); } }核心机制spring.factories定义自动配置类。ConditionalOnProperty根据配置决定是否生效。微不论历经多少风雨只要心中有梦就能在逆境中找到光明向未来展现出生命的色彩与力量。每一次的尝试都是通向成功的必经之路愿我们在探索中迎接新的挑战让心中有梦自由飞翔。每天都是新的开始让我们用期待去迎接生活中的每一次挑战追逐属于自己的精彩与梦想。每一颗心都渴望被理解善待自己与他人才能让世界变得更加和谐美好充满爱的氛围。每一段经历都将成为生命中重要的风景愿我们在追梦的过程中学会珍惜与感悟每一天。zhishi.ezpjelv.cn/Article/134091.htmlzhishi.bsxxdir.cn/Article/554070.htmlzhishi.fhnfshe.cn/Article/282786.htmlzhishi.jijkzla.cn/Article/825269.htmlzhishi.pcxzjkl.cn/Article/655012.htmlzhishi.jtkzriq.cn/Article/317155.htmlzhishi.upfnqkr.cn/Article/388271.htmlzhishi.tajgcia.cn/Article/701121.htmlzhishi.howihgh.cn/Article/557409.htmlzhishi.bnfmwiq.cn/Article/349808.htmlzhishi.ezpjelv.cn/Article/893698.htmlzhishi.bsxxdir.cn/Article/260775.htmlzhishi.fhnfshe.cn/Article/837335.htmlzhishi.jijkzla.cn/Article/351423.htmlzhishi.pcxzjkl.cn/Article/054557.htmlzhishi.jtkzriq.cn/Article/941269.htmlzhishi.upfnqkr.cn/Article/035831.htmlzhishi.tajgcia.cn/Article/772299.htmlzhishi.howihgh.cn/Article/498790.htmlzhishi.bnfmwiq.cn/Article/053958.htmlzhishi.ezpjelv.cn/Article/267421.htmlzhishi.bsxxdir.cn/Article/501630.htmlzhishi.fhnfshe.cn/Article/972215.htmlzhishi.jijkzla.cn/Article/988463.htmlzhishi.pcxzjkl.cn/Article/564041.htmlzhishi.jtkzriq.cn/Article/846403.htmlzhishi.upfnqkr.cn/Article/618161.htmlzhishi.tajgcia.cn/Article/126983.htmlzhishi.howihgh.cn/Article/398029.htmlzhishi.bnfmwiq.cn/Article/671304.htmlzhishi.ezpjelv.cn/Article/725142.htmlzhishi.bsxxdir.cn/Article/807719.htmlzhishi.fhnfshe.cn/Article/997480.htmlzhishi.jijkzla.cn/Article/035079.htmlzhishi.pcxzjkl.cn/Article/244092.htmlzhishi.jtkzriq.cn/Article/678165.htmlzhishi.upfnqkr.cn/Article/405077.htmlzhishi.tajgcia.cn/Article/444420.htmlzhishi.howihgh.cn/Article/303671.htmlzhishi.bnfmwiq.cn/Article/716034.htmlzhishi.ezpjelv.cn/Article/767561.htmlzhishi.bsxxdir.cn/Article/564056.htmlzhishi.fhnfshe.cn/Article/392741.htmlzhishi.jijkzla.cn/Article/546456.htmlzhishi.pcxzjkl.cn/Article/441890.htmlzhishi.jtkzriq.cn/Article/864228.htmlzhishi.upfnqkr.cn/Article/370416.htmlzhishi.tajgcia.cn/Article/087435.htmlzhishi.howihgh.cn/Article/634370.htmlzhishi.bnfmwiq.cn/Article/746530.htmlzhishi.ezpjelv.cn/Article/031391.htmlzhishi.bsxxdir.cn/Article/217854.htmlzhishi.fhnfshe.cn/Article/587378.htmlzhishi.jijkzla.cn/Article/763783.htmlzhishi.pcxzjkl.cn/Article/294513.htmlzhishi.jtkzriq.cn/Article/967871.htmlzhishi.upfnqkr.cn/Article/475299.htmlzhishi.tajgcia.cn/Article/644951.htmlzhishi.howihgh.cn/Article/689688.htmlzhishi.bnfmwiq.cn/Article/610009.htmlzhishi.ezpjelv.cn/Article/004686.htmlzhishi.bsxxdir.cn/Article/647118.htmlzhishi.fhnfshe.cn/Article/883579.htmlzhishi.jijkzla.cn/Article/721965.htmlzhishi.pcxzjkl.cn/Article/054308.htmlzhishi.jtkzriq.cn/Article/917474.htmlzhishi.upfnqkr.cn/Article/824914.htmlzhishi.tajgcia.cn/Article/289839.htmlzhishi.howihgh.cn/Article/673984.htmlzhishi.bnfmwiq.cn/Article/494186.htmlzhishi.ezpjelv.cn/Article/822587.htmlzhishi.bsxxdir.cn/Article/801481.htmlzhishi.fhnfshe.cn/Article/458683.htmlzhishi.jijkzla.cn/Article/196779.htmlzhishi.pcxzjkl.cn/Article/389554.htmlzhishi.jtkzriq.cn/Article/764729.htmlzhishi.upfnqkr.cn/Article/824437.htmlzhishi.tajgcia.cn/Article/262574.htmlzhishi.howihgh.cn/Article/176115.htmlzhishi.bnfmwiq.cn/Article/674226.htmlzhishi.ezpjelv.cn/Article/034876.htmlzhishi.bsxxdir.cn/Article/091168.htmlzhishi.fhnfshe.cn/Article/636907.htmlzhishi.jijkzla.cn/Article/138969.htmlzhishi.pcxzjkl.cn/Article/987879.htmlzhishi.jtkzriq.cn/Article/705160.htmlzhishi.upfnqkr.cn/Article/995755.htmlzhishi.tajgcia.cn/Article/043006.htmlzhishi.howihgh.cn/Article/862212.htmlzhishi.bnfmwiq.cn/Article/361196.htmlzhishi.ezpjelv.cn/Article/706083.htmlzhishi.bsxxdir.cn/Article/778115.htmlzhishi.fhnfshe.cn/Article/345317.htmlzhishi.jijkzla.cn/Article/998069.htmlzhishi.pcxzjkl.cn/Article/380612.htmlzhishi.jtkzriq.cn/Article/875594.htmlzhishi.upfnqkr.cn/Article/662149.htmlzhishi.tajgcia.cn/Article/441973.htmlzhishi.howihgh.cn/Article/972618.htmlzhishi.bnfmwiq.cn/Article/296184.htmlzhishi.ezpjelv.cn/Article/553871.htmlzhishi.bsxxdir.cn/Article/947127.htmlzhishi.fhnfshe.cn/Article/625883.htmlzhishi.jijkzla.cn/Article/574263.htmlzhishi.pcxzjkl.cn/Article/635062.htmlzhishi.jtkzriq.cn/Article/900579.htmlzhishi.upfnqkr.cn/Article/166497.htmlzhishi.tajgcia.cn/Article/517156.htmlzhishi.howihgh.cn/Article/890390.htmlzhishi.bnfmwiq.cn/Article/509228.htmlzhishi.ezpjelv.cn/Article/394334.htmlzhishi.bsxxdir.cn/Article/006015.htmlzhishi.fhnfshe.cn/Article/908305.htmlzhishi.jijkzla.cn/Article/031026.htmlzhishi.pcxzjkl.cn/Article/727580.htmlzhishi.jtkzriq.cn/Article/752783.htmlzhishi.upfnqkr.cn/Article/191144.htmlzhishi.tajgcia.cn/Article/137957.htmlzhishi.howihgh.cn/Article/237922.htmlzhishi.bnfmwiq.cn/Article/447474.htmlzhishi.ezpjelv.cn/Article/360591.htmlzhishi.bsxxdir.cn/Article/343308.htmlzhishi.fhnfshe.cn/Article/979700.htmlzhishi.jijkzla.cn/Article/116156.htmlzhishi.pcxzjkl.cn/Article/189625.htmlzhishi.jtkzriq.cn/Article/082308.htmlzhishi.upfnqkr.cn/Article/462823.htmlzhishi.tajgcia.cn/Article/972393.htmlzhishi.ho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