java – 无法阻止ant生成编译器Sun专有API警告

<javac srcdir="src" 
   destdir="build/classes" source="1.6" 
   target="1.6" debug="true" encoding="Cp1252"
   nowarn="true">

但它仍然在输出中引发编译器警告：

[javac] Compiling 73 source files to C:IKOfficeRootJavaERPFrameworkbuildclasses

[javac] C:IKOfficeRootJavaERPFrameworksrcdeikofficeutilLoggerFactory.java:49: warning: sun.reflect.Reflection is Sun proprietary API and may be removed in a future release
[javac]         return Logger.getLogger(Reflection.getCallerClass(2));
[javac]                                 ^
[javac] Note: C:IKOfficeRootJavaERPFrameworksrcdeikofficedbSingleShotResultSet.java uses or overrides a deprecated API.
[javac] Note: Recompile with -Xlint:deprecation for details.
[javac] Note: Some input files use unchecked or unsafe operations.
[javac] Note: Recompile with -Xlint:unchecked for details.
[javac] 1 warning

我也试过

<compilerarg line="-Xlint:-unchecked -Xlint:-deprecation"/>

和

<compilerarg value="-Xlint:none"/>

但这也没有效果.如何清除警告？