待总结知识点学习
1、使用 MessageFormat 格式化文本
int planet = 7;
String event = "a disturbance in the Force";
String result = MessageFormat.format(
"At {1,time} on {1,date}, there was {2} on planet {0,number,integer}.",
planet, new Date(), event);
The output is:
SRE实战 互联网时代守护先锋，助力企业售后服务体系运筹帷幄！一键直达领取阿里云限量特价优惠。At 12:30 PM on Jul 3, 2053, there was a disturbance in the Force on planet 7.
2、自定义注解
定义注解
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface OperateLog {
/**
* 模块名称
* @return
*/
String moudleName() default "";
/**
* 操作名称
* @return
*/
String optName() default "";
/**
* 业务类型描述
* @return
*/
String description() default "";
}
通过 aop 做拦截处理
@Aspect
@Component
public class OperateLogAspect {
@Autowired
private OperateLogService operateLogService;
@Pointcut("@annotation(com.youngcms.core.annotation.OperateLog)")
public void operateLogCut(){
}
@Around("operateLogCut()")
public Object around(ProceedingJoinPoint point) throws Throwable {
long beginTime = System.currentTimeMillis();
//执行方法
Object result = point.proceed();
//执行时长(毫秒)
long time = System.currentTimeMillis() - beginTime;
//保存日志
saveOperateLog(point, time);
return result;
}
private void saveOperateLog(ProceedingJoinPoint joinPoint, long time) {
MethodSignature signature = (MethodSignature) joinPoint.getSignature();
Method method = signature.getMethod();
RequestMapping classRequestMapping=method.getDeclaringClass().getAnnotation(RequestMapping.class);
OperateLog operateLog=method.getAnnotation(OperateLog.class);
RequestMapping mothodRequestMapping= method.getAnnotation(RequestMapping.class);
com.youngcms.bean.OperateLog operateLogBean=new com.youngcms.bean.OperateLog();
if(operateLog!=null){
operateLogBean.setModuleName(operateLog.moudleName());
operateLogBean.setOptName(operateLog.optName());
operateLogBean.setDescription(operateLog.description());
}
//请求的类名
String className = joinPoint.getTarget().getClass().getName();
//请求的方法名
String methodName = signature.getName();
//请求的参数
//Object[] args = joinPoint.getArgs();
operateLogBean.setIp(IPUtils.getIpAddr(HttpKit.getRequest()));
operateLogBean.setTime(time);
operateLogBean.setMethod(className+"."+methodName+"()");
operateLogBean.setUrl(classRequestMapping.value()[0]+mothodRequestMapping.value()[0]);
String username = ((SysUser) SecurityUtils.getSubject().getPrincipal()).getRealName();
operateLogBean.setAuthor(username);
operateLogBean.setCreateTime(DateUtil.dateToStr(new Date(), 12));
operateLogService.insert(operateLogBean);
}
}
3、条件判断注解
ConditionalOnProperty 的意思是，当 usemysql.local 属性配置存在并且不为 false，则创建这个 bean
@Bean
@ConditionalOnProperty(
name = "usemysql",
havingValue = "local")
@ConditionalOnMissingBean
public DataSource dataSource() {
DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
dataSource.setUrl("jdbc:mysql://localhost:3306/myDb?createDatabaseIfNotExist=true");
dataSource.setUsername("mysqluser");
dataSource.setPassword("mysqlpass");
return dataSource;
}
4.获取 ip 地址工具类
ublic class IPUtils {
private static Logger logger = LoggerFactory.getLogger(IPUtils.class);
/**
* 获取IP地址
*
* 使用Nginx等反向代理软件， 则不能通过request.getRemoteAddr()获取IP地址
* 如果使用了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP地址，X-Forwarded-For中第一个非unknown的有效IP字符串，则为真实IP地址
*/
public static String getIpAddr(HttpServletRequest request) {
String ip = null;
try {
ip = request.getHeader("x-forwarded-for");
if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("Proxy-Client-IP");
}
if (StringUtils.isEmpty(ip) || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("WL-Proxy-Client-IP");
}
if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_CLIENT_IP");
}
if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_X_FORWARDED_FOR");
}
if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}
} catch (Exception e) {
logger.error("IPUtils ERROR ", e);
}
return ip;
}
}
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