session的使用——spring boot

淩亂°似流年 2022-05-20 04:35 190阅读 0赞

springboot中默认session时长是60s，根据业务需求，可以在主程序ApplicationMain.java中配置。

/** * Created by ph 18/7/12. * */ @Configuration//配置控制 @ComponentScan(basePackages = { "cn.com.hisee.hdta.configcenter","cn.com.hisee.common"}) @ImportResource(value = { "classpath:configcenter-dao.xml", "classpath:configcenter-domain.xml"}) @EnableAutoConfiguration//启用自动配置 @SpringBootApplication public class ApplicationMain extends SpringBootServletInitializer { private static final Logger logger = LoggerFactory.getLogger(ApplicationMain.class); @Override protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) { return builder.sources(this.getClass()); } public static void main(String[] args) throws Exception { //启动Spring Boot项目的唯一入口 SpringApplication.run(ApplicationMain.class, args); } /** * 编码设置 * @return */ @Bean public FilterRegistrationBean filterRegistrationBean() { FilterRegistrationBean registrationBean = new FilterRegistrationBean(); CharacterEncodingFilter characterEncodingFilter = new CharacterEncodingFilter(); characterEncodingFilter.setEncoding("UTF-8"); registrationBean.setFilter(characterEncodingFilter); return registrationBean; } /** * session时长设置 * @return */ @Bean public EmbeddedServletContainerCustomizer containerCustomizer(){ return new EmbeddedServletContainerCustomizer() { @Override public void customize(ConfigurableEmbeddedServletContainer Container) { Container.setSessionTimeout(12*60*60);//单位为S } }; } }

模拟真实业务，一般用户登录后需要把用户id存入session  
以下是实例代码

【用户session类：UserSession】

/** * Created by ph on 2018/7/12. */ @Scope(value = "session", proxyMode = ScopedProxyMode.TARGET_CLASS) @Component public class UserSession implements Serializable{ private static final long serialVersionUID = 9120765714832970813L; //id private Integer userId; //账号 private String username; //getter setter 方法 } 这里注意@Scope注解： @Scope(value=ConfigurableBeanFactory.SCOPE_PROTOTYPE)这个是说在每次注入的时候回自动创建一个新的bean实例 @Scope(value=ConfigurableBeanFactory.SCOPE_SINGLETON)单例模式，在整个应用中只能创建一个实例 @Scope(value=WebApplicationContext.SCOPE_GLOBAL_SESSION)全局session中的一般不常用 @Scope(value=WebApplicationContext.SCOPE_APPLICATION)在一个web应用中只创建一个实例 @Scope(value=WebApplicationContext.SCOPE_REQUEST)在一个请求中创建一个实例 @Scope(value=WebApplicationContext.SCOPE_SESSION)每次创建一个会话中创建一个实例 里面还有个属性 proxyMode=ScopedProxyMode.INTERFACES创建一个JDK代理模式 proxyMode=ScopedProxyMode.TARGET_CLASS基于类的代理模式 proxyMode=ScopedProxyMode.NO（默认）不进行代理

【业务类userService】

public class UserService{ /** * 用户登录 * @return */ public CallResult login(){ String username = userParam.getUsername(); String password = userParam.getPassword(); //密码数据库对比 UserInfo userInfo = this.userDomainRepository.findUserInfoByUsername(username); //将用户session this.addSession(userInfo); System.out.println("username : "+userInfo.getUsername()+" 登录-----"); return CallResult.success(userInfo.getId()); } /** * 用户退出 * @return */ public CallResult exit(){ userSession.setUsername(null); userSession.setUserId(null); return CallResult.success(); } /** * 将登录的用户存入session * @param userInfoModel */ public void addSession(UserInfo userInfo){ userSession.setUserId(userInfo.getId()); userSession.setUsername(userInfo.getUsername()); } }

以上是将用户对象存储在ioc容器中，为session域，以下为获取session（即getBean方式）

SpringUtil.java

@Component public class SpringUtil implements ApplicationContextAware { private static ApplicationContext applicationContext = null; @Override public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { if(SpringUtil.applicationContext == null){ SpringUtil.applicationContext = applicationContext; } } //获取applicationContext public static ApplicationContext getApplicationContext() { return applicationContext; } //通过name获取 Bean. public static Object getBean(String name){ return getApplicationContext().getBean(name); } //通过class获取Bean. public static <T> T getBean(Class<T> clazz){ return getApplicationContext().getBean(clazz); } //通过name,以及Clazz返回指定的Bean public static <T> T getBean(String name,Class<T> clazz){ return getApplicationContext().getBean(name, clazz); } }

获取userSession

//获取session用户 UserSession userSession = SpringUtil.getBean(UserSession.class);

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