Error setting expression 'file' with value '[Ljava.lang.String;@1e940b'

Error setting expression 'file' with value '[Ljava.lang.String;@1e940b'

ognl.MethodFailedException: Method "setFile" failed for object com.test.action.ActionTest@15a94f

[java.lang.NoSuchMethodException: com.test.action.ActionTest.setFile([Ljava.lang.String;)]

at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1289)

at ognl.OgnlRuntime.setMethodValue(OgnlRuntime.java:1478)

at ognl.ObjectPropertyAccessor.setPossibleProperty(ObjectPropertyAccessor.java:85)

at ognl.ObjectPropertyAccessor.setProperty(ObjectPropertyAccessor.java:162)

at com.opensymphony.xwork2.ognl.accessor.ObjectAccessor.setProperty(ObjectAccessor.java:27)

at ognl.OgnlRuntime.setProperty(OgnlRuntime.java:2315)

at com.opensymphony.xwork2.ognl.accessor.CompoundRootAccessor.setProperty(CompoundRootAccessor.java:77)

at ognl.OgnlRuntime.setProperty(OgnlRuntime.java:2315)

at ognl.ASTProperty.setValueBody(ASTProperty.java:127)

at ognl.SimpleNode.evaluateSetValueBody(SimpleNode.java:220)

at ognl.SimpleNode.setValue(SimpleNode.java:301)

at ognl.Ognl.setValue(Ognl.java:737)

问题：form表单以二进制的方式查询，需要设置enctype=“multipart/form-data”

出现该问题的环境：使用文件上传的时候，忘记设置了form表单的enctype属性为multipart/form-data