1. java -jar xxx.jar aaa bbb cccc
   1.1 通过main方法的参数获取
   1.2 或者通过ApplicationArguments注入获取
   
2. java -jar xxx.jar --a1=aaa --b1=bbb
   2.1 可以通过@Value("${a1}") 获取
   

pom文件引入jar包

<dependency>
 <groupId>org.springframework</groupId>
 <artifactId>spring-test</artifactId>
 <version>4.3.2.RELEASE</version>
 <scope>test</scope>
</dependency>
<dependency>
 <groupId>junit</groupId>
 <artifactId>junit</artifactId>
 <version>4.12</version>
 <scope>test</scope>
</dependency>

单元测试编写

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {
 "classpath:beans.xml",
 "classpath:mybatis.xml"
 })
@FixMethodOrder(MethodSorters.NAME_ASCENDING)
public class ServiceTest {
 @Resource
 private TrackService trackService;
 @Test
 public void testFindListByReferenceNo(){
 List<TrackEnt> list = service.findListByReferenceNo("KKon0019998");
 assertEquals(10,list.size());
 }
}

1.1 通过@Before实现测试用例运行前初始化
1.2 通过@After实现测试用例完成后清理
1.3 参考:https://www.jianshu.com/p/83eadf7b352f

1. 执行顺序:filter -> Interceptor -> controller
2. handleInterceptor拦截比filter更加精准,可以到达方法级别
   2.1 preHandle是在进入controller之前执行,postHandle是在返回model渲染视图之前执行,afterCompletion是在request执行完成后执行的
   2.2 拦截配置:

   public class MvcConfig implements WebMvcConfigurer{
    	@Override
    	public void addViewControllers(ViewControllerRegistry registry) {
    		registry.addViewController("/").setViewName("forward:/WEB-INF/views/login.jsp");
    		registry.setOrder(Ordered.HIGHEST_PRECEDENCE);
    	}
    
    	@Override
    	public void addResourceHandlers(ResourceHandlerRegistry registry) {
    		registry.addResourceHandler("/webapp/static/**").addResourceLocations("classpath:/webapp/static/");
    	}
    
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
    registry.addInterceptor(userInterceptor).addPathPatterns("/**").excludePathPatterns("/login/sub.do");
    }
   }
   

   2.3 被拦截后返回错误码

   public class UserInterceptor extends HandlerInterceptorAdapter {
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
    PdaResponse pdaResult = new PdaResponse();
    pdaResult.setSuccess(false);
    pdaResult.setCode("-2");
    pdaResult.setMessage("pdaNeedReLogin");
    response.getOutputStream().write(JsonUtl.Object2Json(pdaResult).getBytes());
    response.getOutputStream().close();
    return false;
    }
   }
   

1. getSession(boolean create):返回当前request中的HttpSession
   -->如果当前reqeust中的HttpSession为null
   (1)当create为true,就创建一个新的session
   (2)当create为false,返回null
   
2. HttpServletRequest.getSession(ture)等同于HttpServletRequest.getSession()
   
3. session原理图
   session原理图
   3.1 注册过滤器代理
   tomcat注册过滤器代理
   3.2 Session过滤器执行流程分析
   Session过滤器执行流程分析
   (1)对请求的HttpServletRequest ,HttpServletResponse 对进行包装
   (2)调用 filterChain.doFilter(strategyRequest, strategyResponse)往后传递
   --> 获得session的话,得到的将会是Spring Session 提供的 HttpServletSession实例
   (3)整个过滤器链执行完后,提交session:wrappedRequest.commitSession();
   3.3 SessionRepositoryFilter$SessionRepositoryRequestWrapper#getSession方法分析
   

    1. S requestedSession = getRequestedSession();
    1.1 List<String> sessionIds = SessionRepositoryFilter.this.httpSessionIdResolver
    						 .resolveSessionIds(this);
    (1)httpSessionIdResolver分为CookieHttpSessionIdResolver和HeaderHttpSessionIdResolver
    --> 分别从cookie或者头部获取sessionId
    1.2 S session = SessionRepositoryFilter.this.sessionRepository
    							 .findById(sessionId);
    -->通过sessionId在存储里查找session
    2. 如果根据sessionId没有找到sesssion并且create参数为true,则新建
    --> S session = SessionRepositoryFilter.this.sessionRepository.createSession();