com.feilong.tools.slf4j

Class Slf4jUtil

java.lang.Object

com.feilong.tools.slf4j.Slf4jUtil

public final class Slf4jUtil
extends Object

对 slf4j 的封装提取.

Since:

1.4.0

Author:

feilong

Method Summary

Methods

Modifier and Type	Method and Description
static String	format(String messagePattern, Object... args) 格式化字符串,此方法是抽取slf4j的核心方法.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

format

public static String format(String messagePattern,
            Object... args)

格式化字符串,此方法是抽取slf4j的核心方法.

在java中,常会拼接字符串生成新的字符串值,在字符串拼接过程中容易写错或者位置写错

slf4j的log支持格式化输出log,比如:

• LOGGER.debug("{}","feilong");
• LOGGER.info("{},{}","feilong","hello");

这些写法非常简洁且有效,不易出错
因此,你可以在代码中出现这样的写法:

 throw new IllegalArgumentException(Slf4jUtil.format(
  "callbackUrl:[{}] ,length:[{}] can't >{}",
  callbackUrl,
  callbackUrlLength,
  callbackUrlMaxLength)
 

又或者

 return Slf4jUtil.format("{} [{}]", encode, encode.length());
 

Parameters:

messagePattern - message的格式,比如 callbackUrl:[{}] ,length:[{}]

args - 参数

Returns:

如果 messagePattern 是null,返回 null
如果 args 是null,返回 messagePattern

Since:

1.6.0

See Also:

FormattingTuple, MessageFormatter.arrayFormat(String, Object[]), FormattingTuple.getMessage()