java.lang.IllegalAccessError: tried to access field org.slf4j.impl.StaticLoggerBinder.SINGLETON from class org.slf4j.LoggerFactory

標籤：

java.lang.IllegalAccessError: tried to access field org.slf4j.impl.Static..
java.lang.IllegalAccessError: tried to access field org.slf4j.impl.StaticLoggerBinder.SINGLETON from class org.slf4j.LoggerFactory

使用hbm2java時，使用hibernate-distribution-3.3.1.GA-dist版本，做好了程式和設定檔後，運行程式出現Exception in thread "main" java.lang.IllegalAccessError: tried to access field org.slf4j.impl.StaticLoggerBinder.SINGLETON from class org.slf4j.LoggerFactory錯誤。



問題原因：jar檔案版本衝突

類 org.slf4j.impl.StaticLoggerBinder在slf4j-api 中是類的公有靜態變數:




public static final StaticLoggerBinder SINGLETON = new StaticLoggerBinder();


而在slf4j-log4j12（slf4j-nop.jar, slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar or logback-classic.jar其中之一）中確是私人變數:



private static final StaticLoggerBinder SINGLETON = new StaticLoggerBinder();



解決方案：1.修改slf的原始碼，將這個變數有私人改為公有，再打包，問題可解決。

                  2.slf4j-api.jar 刪除，再匯入同版本的slf4j-api-1.5.6.jar 和slf4j-log4j12-1.5.6.jar ，問題可解決。

slf4j-api.jar 在hibernate-distribution-3.3.1.GA-dist/lib/required檔案夾下

java.lang.IllegalAccessError: tried to access field org.slf4j.impl.StaticLoggerBinder.SINGLETON from class org.slf4j.LoggerFactory