Springboot中使用監聽器
一、傳統的方法(configguration)
@Slf4j
public class MyListener implements ServletContextListener {
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@Override
public void contextInitialized(ServletContextEvent sce) {
log.info("web專案的啟動{} 一開始就啟動",sce.getServletContext());
System.err.println("web專案的啟動{}");
}
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@Override
public void contextDestroyed(ServletContextEvent sce) {
log.info("web專案的關閉{}.........................");
System.err.println("web專案的關閉{}............................");
}
}
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把監聽器給springboot
@Configuration
public class ListenerConfig {
@Bean
public ServletListenerRegistrationBean myListener() {
ServletListenerRegistrationBean<MyListener> registrationBean = new
ServletListenerRegistrationBean<>(new MyListener());
return registrationBean;
}
}
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二、基于注解的實作
@WebListener
@Component
public class LoginListener implements ServletRequestListener {
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@Override
public void requestInitialized(ServletRequestEvent servletRequestEvent) {
System.out.println("---------------------------->請求創建");
}
@Override
public void requestDestroyed(ServletRequestEvent servletRequestEvent) {
System.out.println("---------------------------->請求銷毀");
}
}
最后，在啟動類加上注解@ServletComponentScan(basePackages = "com.apl.pgs.listener.*")，開啟監聽器，
basePackages =監聽器的 包名+類名 ，可以開啟一個或多個，
這樣，監聽器就配置完成了，具體業務邏輯可以在監聽器做處理了，
Springboot中使用列舉實作的切面：
一、基于注解實作的切面
@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
public @interface OperationLog {
String[] value();
}
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//列舉類
public enum OperateType {
OPERATE_TYPE_1(1, "添加"),
OPERATE_TYPE_2(2, "修改"),
OPERATE_TYPE_3(3, "洗掉"),
OPERATE_TYPE_4(4, "查詢"),
OPERATE_TYPE_5(5, "停用/啟用"),
OPERATE_TYPE_6(6, "發布"),
OPERATE_TYPE_7(7, "上傳"),
OPERATE_TYPE_8(8, "匯入"),
OPERATE_TYPE_9(9, "匯出"),
OPERATE_TYPE_10(10, "作廢"),
OPERATE_TYPE_11(11, "排序");
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private Integer no;
private String name;
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OperateType(Integer no, String name) {
this.no = no;
this.name = name;
}
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public static Integer getNo(String name) {
for (OperateType o : OperateType.values()) {
if (o.getName().equals(name)) {
return o.getNo();
}
}
return null;
}
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public Integer getNo() {
return no;
}
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public void setNo(Integer no) {
this.no = no;
}
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public String getName() {
return name;
}
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public void setName(String name) {
this.name = name;
}
}
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//切面類的方法
@Aspect
@Component
public class OperationLogAspect {
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@Autowired
private JdOperateLogService logService;
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@Pointcut("@annotation(OperationLog)")
public void dbPointCut() {
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}
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@Before("dbPointCut()")
public void beforeSwitchDS(JoinPoint point){
// 獲得當前訪問的class
Class<?> className = point.getTarget().getClass();
// 獲得訪問的方法名
String methodName = point.getSignature().getName();
// 得到方法的引數的型別
Class[] argClass = ((MethodSignature)point.getSignature()). 