Unsupported major.minor version 52.0
1.首先解释一下：J2SE 8 = 52,J2SE 7 = 51,J2SE 6.0 = 50,J2SE 5.0 = 49,JDK 1.4 = 48,JDK 1.3 = 47,JDK 1.2 = 46,JDK 1.1 = 45Unsupported major.minor version 52.0: 看到Unsupported你是不是会想到jdk高版本能兼容低版本，但是低版...
