fastjson.serializer.stringcodec.write(stringcodec.java:34).alibaba.fastjson.serializer.mapserializer.write(mapserializer.java:188).alibaba.fastjson.serializer.jsonserializer.write(jsonserializer.java:369).alibaba.fastjson.json.tojsonstring(json.java:418).alibaba.fastjson.json.tojsonstring(json.java:406).encrypt.action.execute(action.java:68) sun.reflect.generatedmethodessor38.invoke(unknownsource) sun.reflect.delegatingmethodessorimpl.invoke(unknownsource) java.lang.reflect.method.invoke(unknownsource).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) org.apache.struts2.interceptor.va