关于java：JasperReports：不支持的major.minor版本51.0

JasperReports: Unsupported major.minor version 51.0

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Exception in thread"main" java.lang.UnsupportedClassVersionError: a (Unsupported major.minor version 51.0)

IAM获取错误"unsupported major.minor version 51.0"。我使用的是JDK 1.6，并将编译器的遵从性级别设置为1.6，而JRE是JRE6。但我还是犯了同样的错误。

这是我的错误

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java.lang.UnsupportedClassVersionError: transfer_1355215622877_662113 : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
at net.sf.jasperreports.engine.util.JRClassLoader.loadClass(JRClassLoader.java:245)
at net.sf.jasperreports.engine.util.JRClassLoader.loadClassFromBytes(JRClassLoader.java:154)
at net.sf.jasperreports.engine.design.JRAbstractJavaCompiler.loadEvaluator(JRAbstractJavaCompiler.java:76)
at net.sf.jasperreports.engine.design.JRAbstractCompiler.loadEvaluator(JRAbstractCompiler.java:327)
at net.sf.jasperreports.engine.design.JRDefaultCompiler.loadEvaluator(JRDefaultCompiler.java:218)
at net.sf.jasperreports.engine.fill.JRFillDataset.createCalculator(JRFillDataset.java:404)
at net.sf.jasperreports.engine.fill.JRBaseFiller.(JRBaseFiller.java:373)