错误: 找不到或无法加载主类 org.apache.james.app.spring.JamesAppSpringMain

If you run JDK7, James will not start due to a bug in JAXB. As temporary workaround, you can       download the latest 2.1 version of JAXB from       http://jaxb.java.net/2.1.13/JAXB2_20100510.jar       and copy the extracted jaxb-impl.jar into conf/lib.

如果使用JDK7 则需要下载 JAZB http://jaxb.java.net/2.1.13/JAXB2_20100510.jar 将文件拷贝到James3.x/conf/lib的目录下