slf4j-log4j12-1.7.26.jar
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org.slf4j:slf4j-log4j12:1.7.26
META-INF
org
apache
slf4j
impl
StaticMDCBinder.java
VersionUtil.java
Log4jMDCAdapter.java
Log4jLoggerAdapter.java
Log4jLoggerFactory.java
StaticLoggerBinder.java
StaticMarkerBinder.java
VersionUtil.java
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类结构
package org.slf4j.impl; import java.lang.reflect.
Method
; import org.slf4j.helpers.
Util
; public class
VersionUtil
{ static final int
MINIMAL_VERSION
= 5; static public int
getJavaMajorVersion
() {
String
javaVersionString
=
Util
.
safeGetSystemProperty
("java.version"); return
getJavaMajorVersion
(
javaVersionString
); } static int
getJavaMajorVersion
(
String
versionString
) { if (
versionString
== null) return
MINIMAL_VERSION
; if (
versionString
.
startsWith
("1.")) { return
versionString
.
charAt
(2) - '0'; } else { // we running under Java 9 or later try {
Method
versionMethod
=
Runtime
.class.
getMethod
("version");
Object
versionObj
=
versionMethod
.
invoke
(null);
Method
majorMethod
=
versionObj
.
getClass
().
getMethod
("major");
Integer
resultInteger
= (
Integer
)
majorMethod
.
invoke
(
versionObj
); return
resultInteger
.
intValue
(); } catch (
Exception
e
) { return
MINIMAL_VERSION
; } } } }
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