JavaSE 6 comes with JAXB 2.0 API in rt.jar . Therefore, using JAXB 2.1 with JavaSE 6 requires one to override a portion of rt.jar with the new API. There are several ways to do this:
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Place the 2.1 jaxb-api.jar into $JRE_HOME/lib/endorsed . This essentially makes your JRE to "JRE 6 + JAXB 2.1". This won't affect any other applications that use this JRE, and it's easy. On the other hand, in various scenarios you may not be able to alter the JRE.
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Use the system property java.endorsed.dirs when you launch your application, and have it point to the directory that contains the 2.1 jaxb-api.jar . This allows you use use JAXB 2.1 without modifying the JRE. Make sure not to include any other JAXB RI jar files (such as jsr173-api.jar or jaxb-impl.jar .)
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Implement a custom ClassLoader and block delegation to javax.xml.bind package, so that code running inside this class loader will load the JAXB API from elsewhere. This is a very advanced approach.
No matter which approach you take, make sure not to include jar files other than jaxb-api.jar . Doing so, for example including jaxb-xjc.jar , may result in classloading related errors such as "taskdef A class needed by class com.sun.tools.xjc.XJCTask cannot be found: org/apache/tools/ant/...."
jdk6update12也可解决
https://jaxb.dev.java.net/guide/Which_JAXB_RI_is_included_in_which_JDK_.htmlWhich JAXB RI is included in which JDK?This table captures the history of the JAXB RI integration into Java6. This is for information purposes only. In particular, the JAXB RI in JDK6 is package renamed to avoid any conflict with the stand-alone JAXB RI distribution or with the jaxb2-reflection library. You can use any version of these with any version of JDK without worrying about implementation conflicts.
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