添加日志管理

使用slf4j日志，务必注意slf4j和log4j的jar，一定要版本匹配，否则不起作用，还会被其他jar的子jar的slf4j和log4j导致问题更加复杂

可以参考：https://blog.youkuaiyun.com/howard789/article/details/78324488

或者直接使用他们的jar组合：

<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>

<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.6.5</version>
</dependency>

<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.6.5</version>
</dependency>

<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-nop</artifactId>
<version>1.6.5</version>
</dependency>

log4j.properties配置文件：

log4j.rootLogger = info , D , stdout
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = %d{ISO8601} %5p %C{1}:%L - %m%n
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = ../logs/user-rt-flinkjob.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = DEBUG
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %d{ISO8601} %5p %C{1}:%L - %m%n