SpringBoot整合log4j日志与HashMap的底层原理解析

#log4j.rootLogger=CONSOLE,info,error,DEBUG
log4j.rootLogger=info,error,CONSOLE,DEBUG
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender  
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout  
log4j.appender.CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n  
log4j.logger.info=info
log4j.appender.info=org.apache.log4j.DailyRollingFileAppender
log4j.appender.info.layout=org.apache.log4j.PatternLayout  
log4j.appender.info.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n 
log4j.appender.info.datePattern='.'yyyy-MM-dd
log4j.appender.info.Threshold = info 
log4j.appender.info.append=true 
#log4j.appender.info.File=/home/admin/pms-api-services/logs/info/api_services_info
log4j.appender.info.File=/Users/dddd/Documents/testspace/pms-api-services/logs/info/api_services_info
log4j.logger.error=error 
log4j.appender.error=org.apache.log4j.DailyRollingFileAppender
log4j.appender.error.layout=org.apache.log4j.PatternLayout  
log4j.appender.error.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n 
log4j.appender.error.datePattern='.'yyyy-MM-dd
log4j.appender.error.Threshold = error 
log4j.appender.error.append=true 
#log4j.appender.error.File=/home/admin/pms-api-services/logs/error/api_services_error
log4j.appender.error.File=/Users/dddd/Documents/testspace/pms-api-services/logs/error/api_services_error
log4j.logger.DEBUG=DEBUG
log4j.appender.DEBUG=org.apache.log4j.DailyRollingFileAppender
log4j.appender.DEBUG.layout=org.apache.log4j.PatternLayout  
log4j.appender.DEBUG.layout.ConversionPattern=%d{yyyy-MM-dd-HH-mm} [%t] [%c] [%p] - %m%n 
log4j.appender.DEBUG.datePattern='.'yyyy-MM-dd
log4j.appender.DEBUG.Threshold = DEBUG 
log4j.appender.DEBUG.append=true 
#log4j.appender.DEBUG.File=/home/admin/pms-api-services/logs/debug/api_services_debug
log4j.appender.DEBUG.File=/Users/dddd/Documents/testspace/pms-api-services/logs/debug/api_services_debug

log4j\u4EE3\u7801
private static final Logger logger = LoggerFactory.getLogger(IndexController.class);

<!-- springboot-log4j -->
<dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-log4j</artifactId>
 <version>1.3.8.RELEASE</version>
</dependency>

@RestController
public class LoggController {
 private static final Logger logger = LoggerFactory.getLogger(LoggController.class);
 @RequestMapping("/printLog")
 public String printLog(){
  logger.info("日志打印输出了......");
  return "Hello World.....";
 }
}

<!--Aop依赖-->
<dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-aop</artifactId>
</dependency>

@Aspect
@Component
public class WebLogAspect {
 private static final Logger logger = LoggerFactory.getLogger(WebLogAspect.class);
 @Pointcut("execution(public * com.oracle.order.controller.*.*(..))")
 public void webLog() {
   }
 @Before("webLog()")
 public void doBefore(JoinPoint joinPoint) throws Throwable {
   // 接收到请求，记录请求内容
   ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
   HttpServletRequest request = attributes.getRequest();
   // 记录下请求内容
   logger.info("URL : " + request.getRequestURL().toString());
   logger.info("HTTP_METHOD : " + request.getMethod());
   logger.info("IP : " + request.getRemoteAddr());
   Enumeration<String> enu = request.getParameterNames();
   while (enu.hasMoreElements()) {
   String name = (String) enu.nextElement();
   logger.info("name:{},value:{}", name, request.getParameter(name));
  }
  }
 @AfterReturning(returning = "ret", pointcut = "webLog()")
 public void doAfterReturning(Object ret) throws Throwable {
   // 处理完请求，返回内容
   logger.info("RESPONSE : " + ret);
  }
 }

@RequestMapping("/getMember")
public String getMember(String name,Integer age){
 return "success";
}

<!--lombok插件-->
<dependency>
 <groupId>org.projectlombok</groupId>
 <artifactId>lombok</artifactId>
</dependency>

1.进入idea主页面
2.打开idea左上角的file
3.找到settings,点开后找plugins
4.搜索lombox,点install进行安装

@Slf4j // 可以直接使用log打印输出 不需要创建对象
@Data //集成了Get Set toString的功能
public class Emp {
 String username;
 String password;
 public static void main(String[] args) {
  Emp emp = new Emp();
  emp.setUsername("sunny");
  emp.setPassword("123");
  log.info(emp.toString());
 }
}

"classpath:/META-INF/resources/", 
"classpath:/resources/",
"classpath:/static/", 
"classpath:/public/" 
"/"：当前项目的根路径直接访问html页面
例如：http://localhost:8080/test04.html

http://localhost:8081/springboot/static/test04.html
在该目录下再加一层同名文件

数据结构：1.8前（数组+链表），1.8之后（数组+链表+红黑树）
 table类型：一个是entry，一个是load
 创建table时机，1.8之前是创建map时创建，1.8之后添加数据时创建