p>
javang.stringindexoutofboundsexception: string index out of range: -10
javang.string.substring(string.java:1911)
.lib.decryptutil.filedecrypt(decryptutil.java:22)
.encrypt.action.execute(action.java:59)
sun.reflect.generatedmethodessor38.invoke(unknown source)
sun.reflect.delegatingmethodessorimpl.invoke(delegatingmethodessorimpl.java:43)
javang.reflect.method.invoke(method.java:606)
.opensymphony.xwork2.defaultactioninvocation.invokeaction(defaultactioninvocation.java:452)
.opensymphony.xwork2.defaultactioninvocation.invokeactiononly(defaultactioninvocation.java:291)
.opensymphony.xwork2.defaultactioninvocation.invoke(defaultactioninvocation.java:254)
.opensymphony.xwork2.interceptor.defaultworkflowinterceptor.dointercept(defaultworkflowinterceptor.java:176)
.opensymphony.xwork2.interceptor.methodfilterinterceptor.intercept(methodfilterinterceptor.java:98)
.opensymphony.xwork2.defaultactioninvocation.invoke(defaultactioninvocation.java:248)
.opensymphony.xwork2.validator.validationinterceptor.dointercept(validationinterceptor.java:263)