Struts2-java.lang.IllegalAccessException: Class ognl. ognlruntime can not access a member

This is a very tangled problem that I encountered. If this problem occurs for the first time, it will definitely make you quite confused. Haha

[C-sharp] view plaincopyprint? 01.2010-10-19 18:27:22 COM. opensymphony. xwork2.util. logging. JDK. jdklogger warn 02. warning: Error setting expression 'nnew. ntitle 'with value' [ljava. lang. string; @ df804e '03. ognl. nosuchpropertyexception: COM. center. VO. news_table.ntitle [Java. lang. illegalaccessexception: Class ognl. ognlruntime can not access a member of class COM. center. VO. news_table with modifiers "private"] 04. at ognl. ognlruntime. setfieldvalue (ognlruntime. java: 1663) 05. at ognl. objectpropertyaccessor. setpossibleproperty (objectpropertyaccessor. java: 87) 06. at ognl. objectpropertyaccessor. setproperty (objectpropertyaccessor. java: 162) 07. at COM. opensymphony. xwork2.ognl. accessor. objectaccessor. setproperty (objectaccessor. java: 27) 08. at ognl. ognlruntime. setproperty (ognlruntime. java: 2245) 09. at ognl. astproperty. setvaluebody (astproperty. java: 127) 10. at ognl. simplenode. evaluatesetvaluebody (simplenode. java: 220) 11. at ognl. simplenode. setvalue (simplenode. java: 301) 12. at ognl. astchain. setvaluebody (astchain. java: 227) 13. at ognl. simplenode. evaluatesetvaluebody (simplenode. java: 220) 14. at ognl. simplenode. setvalue (simplenode. java: 301) 15. at ognl. ognl. setvalue (ognl. java: 737) 16. at COM. opensymphony. xwork2.ognl. ognlutil. setvalue (ognlutil. java: 209) 17. at COM. opensymphony. xwork2.ognl. ognlvaluestack. trysetvalue (ognlvaluestack. java: 173) 18. at COM. opensymphony. xwork2.ognl. ognlvaluestack. setvalue (ognlvaluestack. java: 160) 19. at COM. opensymphony. xwork2.ognl. ognlvaluestack. setvalue (ognlvaluestack. java: 151) 20. at COM. opensymphony. xwork2.interceptor. parametersinterceptor. setparameters (parametersinterceptor. java: 288) 21. at COM. opensymphony. xwork2.interceptor. parametersinterceptor. dointercept (parametersinterceptor. java: 199) 22. at COM. opensymphony. xwork2.interceptor. methodfilterinterceptor. intercept (methodfilterinterceptor. java: 98) 23. at COM. opensymphony. xwork2.defaactionactioninvocation. invoke (defaactionactioninvocation. java: 248) 24. at COM. opensymphony. xwork2.interceptor. parametersinterceptor. dointercept (parametersinterceptor. java: 207) 25. at COM. opensymphony. xwork2.interceptor. methodfilterinterceptor. intercept (methodfilterinterceptor. java: 98) 26. at COM. opensymphony. xwork2.defaactionactioninvocation. invoke (defaactionactioninvocation. java: 248) 27. at COM. opensymphony. xwork2.interceptor. staticparametersinterceptor. intercept (staticparametersinterceptor. java: 190) 28. at COM. opensymphony. xwork2.defaactionactioninvocation. invoke (defaactionactioninvocation. java: 248) 29. at Org. apache. struts2.interceptor. multiselectinterceptor. intercept (multiselectinterceptor. java: 75) 30. at COM. opensymphony. xwork2.defaactionactioninvocation. invoke (defaactionactioninvocation. java: 248) 31. at Org. apache. struts2.interceptor. checkboxinterceptor. intercept (checkboxinterceptor. java: 94) 32. at COM. opensymphony. xwork2.defaactionactioninvocation. invoke (defaactionactioninvocation. java: 248) 33. at Org. apache. struts2.interceptor. fileuploadinterceptor. intercept (fileuploadinterceptor. java: 243) 34. at COM. opensymphony. xwork2.defaactionactioninvocation. invoke (defaactionactioninvocation. java: 248) 35. at COM. opensymphony. xwork2.interceptor. modeldriveninterceptor. intercept (modeldriveninterceptor. java: 100) 36. at COM. opensymphony. xwork2.defaactionactioninvocation. invoke (defaactionactioninvocation. java: 248) 37. at COM. opensymphony. xwork2.interceptor. scopedmodeldriveninterceptor. intercept (scopedmodeldriveninterceptor. java: 141) 38. at COM. opensymphony. xwork2.defaactionactioninvocation. invoke (defaactionactioninvocation. java: 248) 39. at Org. apache. struts2.interceptor. debugging. debugginginterceptor. intercept (debugginginterceptor. java: 267) 40. at COM. opensymphony. xwork2.defaactionactioninvocation. invoke (defaactionactioninvocation. java: 248) 41. at COM. opensymphony. xwork2.interceptor. chaininginterceptor. intercept (chaininginterceptor. java: 142) 42. at COM. opensymphony. xwork2.defaactionactioninvocation. invoke (defaactionactioninvocation. java: 248) 43. at COM. opensymphony. xwork2.interceptor. prepareinterceptor. dointercept (prepareinterceptor. java: 166) 44. at COM. opensymphony. xwork2.interceptor. methodfilterinterceptor. intercept (methodfilterinterceptor. java: 98) 45. at COM. opensymphony. xwork2.defaactionactioninvocation. invoke (defaactionactioninvocation. java: 248) 46. at COM. opensymphony. xwork2.interceptor. i18ninterceptor. intercept (i18ninterceptor. java: 176) 47. at COM. opensymphony. xwork2.defaactionactioninvocation. invoke (defaactionactioninvocation. java: 248) 48. at Org. apache. struts2.interceptor. servletconfiginterceptor. intercept (servletconfiginterceptor. (Java: 164) 49. at COM. opensymphony. xwork2.defaactionactioninvocation. invoke (defaactionactioninvocation. java: 248) 50. at COM. opensymphony. xwork2.interceptor. aliasinterceptor. intercept (aliasinterceptor. java: 190) 51. at COM. opensymphony. xwork2.defaactionactioninvocation. invoke (defaactionactioninvocation. java: 248) 52. at COM. opensymphony. xwork2.interceptor. predictionmappinginterceptor. intercept (exceptionmappinginterceptor. java: 187) 53. at COM. opensymphony. xwork2.defaactionactioninvocation. invoke (defaactionactioninvocation. java: 248) 54. at org.apache.struts2.impl.strutsactionproxy.exe cute (strutsactionproxy. java: 52) 55. at Org. apache. struts2.dispatcher. dispatcher. serviceaction (dispatcher. java: 485) 56. at Org. apache. struts2.dispatcher. filterdispatcher. dofilter (filterdispatcher. java: 395) 57. at Org. apache. catalina. core. applicationfilterchain. internaldofilter (applicationfilterchain. java: 235) 58. at Org. apache. catalina. core. applicationfilterchain. dofilter (applicationfilterchain. java: 206) 59. at Org. apache. catalina. core. standardwrappervalve. invoke (standardwrappervalve. java: 233) 60. at Org. apache. catalina. core. standardcontextvalve. invoke (standardcontextvalve. java: 191) 61. at Org. apache. catalina. core. standardhostvalve. invoke (standardhostvalve. java: 128) 62. at Org. apache. catalina. valves. errorreportvalve. invoke (errorreportvalve. java: 102) 63. at Org. apache. catalina. core. standardenginevalve. invoke (standardenginevalve. java: 109) 64. at Org. apache. catalina. connector. coyoteadapter. service (coyoteadapter. java: 293) 65. at Org. apache. coyote. http11.http11processor. process (http11processor. java: 849) 66. at Org. apache. coyote. http11.http11protocol $ http11connectionhandler. process (http11protocol. java: 583) 67. at org.apache.tomcat.util.net. jioendpoint $ worker. run (jioendpoint. java: 454) 68. at java. lang. thread. run (unknown source) 69. caused by: Java. lang. illegalaccessexception: Class ognl. ognlruntime can not access a member of class COM. center. VO. news_table with modifiers "private" 70. at sun. reflect. reflection. ensurememberaccess (unknown source) 71. at java. lang. reflect. field. dosecuritycheck (unknown source) 72. at java. lang. reflect. field. getfieldaccessor (unknown source) 73. at java. lang. reflect. field. set (unknown source) 74. at ognl. ognlruntime. setfieldvalue (ognlruntime. java: 1655)

This is because the attribute name is invalid !! As shown in the preceding error message, the set and get methods for generating attribute names such as "Ntitle" are nonstandard! Therefore, passing Parameters Using domainmodel in struts2 may cause a "misunderstanding" in struts2 "!! Is it really tangled?