json.serializer.StringCodec.write(StringCodec.java:49)
com.alibaba.fastjson.serializer.StringCodec.write(StringCodec.java:34)
com.alibaba.fastjson.serializer.MapSerializer.write(MapSerializer.java:188)
com.alibaba.fastjson.serializer.JSONSerializer.write(JSONSerializer.java:369)
com.alibaba.fastjson.JSON.toJSONString(JSON.java:418)
com.alibaba.fastjson.JSON.toJSONString(JSON.java:406)
co.execute(Action.java:68)
sun.reflect.GeneratedMethodAccessor38.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.ng.reflect.Method.invoke(Method.java:606)
com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:452)
com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:291)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:254)
com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:176)
com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:263)
org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.j