RedirectAttributes对象addFlashAttribute()的使用

古城微笑少年丶 2022-06-11 23:39 156阅读 0赞

**\[java\]** view plain copy

print ?

1. 
2.

**\[java\]** view plain copy

print ?

1. RedirectAttributes对象addFlashAttribute()的使用

RedirectAttributes对象addFlashAttribute()的使用

**\[java\]** view plain copy

print ?

1. @RequestMapping(value=“/edit/\{id\}”,method= RequestMethod.GET)
2. public String edit(@PathVariable(value=“id”) int id,ModelMap map,RedirectAttributes redirectAttributes) \{
3. PartsChange change = partsChangeService.findOne(id);
4. PartsChangeFB fb = PartsChangeFB.toFB(change);
5. if(!PartsChange.STATUS\_NEW.equals(fb.getStatus()))\{
6. redirectAttributes.addFlashAttribute(”errorInfo”,“不能修改！”);
7. return “redirect:/partsChange”;
8. \}
9. List<PartsChangeFile> fileList = partsChangeFileService.findByChangeId(id);
10. map.addAttribute(”partsChange”, fb);
11. map.addAttribute(”fileList”, fileList);
12. return “partsChange/editInfo”;
13. \}

@RequestMapping(value="/edit/{id}",method= RequestMethod.GET)
 public String edit(@PathVariable(value="id") int id,ModelMap map,RedirectAttributes redirectAttributes) {
 PartsChange change = partsChangeService.findOne(id);
 PartsChangeFB fb = PartsChangeFB.toFB(change);
 if(!PartsChange.STATUS_NEW.equals(fb.getStatus())){
 redirectAttributes.addFlashAttribute("errorInfo","不能修改！");
 return "redirect:/partsChange";
 }
 List<PartsChangeFile> fileList = partsChangeFileService.findByChangeId(id);
 map.addAttribute("partsChange", fb);
 map.addAttribute("fileList", fileList);
 return "partsChange/editInfo";
 }

**ModelMap对象addAttribute()的使用**

**\[java\]** view plain copy

print ?

1. @RequestMapping(value = “/save”, method = RequestMethod.POST)
2. public String save(@ModelAttribute @Valid EquipmentFB equipmentFB, BindingResult result, ModelMap map) \{
3. if (result.hasErrors()) \{
4. map.addAttribute(”message”, ErrorUtils.fetchAllErrorMessages(result));
5. if(equipmentFB.getEquipTypeId() != null && equipmentFB.getEquipTypeId() != 0)\{
6. EquipType equipType = equipTypeService.findOne(equipmentFB.getEquipTypeId());
7. equipmentFB.setEquipTypeName(equipType.getName());
8. \}
9. map.addAttribute(”equipment”, equipmentFB);
10. return “/nbs/equipment/edit”;
11. \}
12. String error = ”“;
13. 
14. if(StringUtils.isEmpty(equipmentFB.getNumber()))\{
15. error = error +Constant.ERROR\_EQUIPMENTCONTROLLER\_NUMBER\_CANNOT\_NULL;
16. \}
17. 
18. if(StringUtils.isEmpty(equipmentFB.getName()))\{
19. error = error +Constant.ERROR\_EQUIPMENTCONTROLLER\_NAME\_CANNOT\_NULL;
20. \}
21. 
22. if(equipmentFB.getEquipTypeId() == null || equipmentFB.getEquipTypeId() == 0)\{
23. error = error +Constant.ERROR\_EQUIPMENTCONTROLLER\_TYPE\_CANNOT\_NULL;
24. \}
25. if (!“”.equals(error)) \{
26. map.addAttribute(”message”, error);
27. if(equipmentFB.getEquipTypeId() != null && equipmentFB.getEquipTypeId() != 0)\{
28. EquipType equipType = equipTypeService.findOne(equipmentFB.getEquipTypeId());
29. equipmentFB.setEquipTypeName(equipType.getName());
30. \}
31. map.addAttribute(”equipment”, equipmentFB);
32. return “/nbs/equipment/edit”;
33. \}
34. 
35. Equipment equipment = new Equipment();
36. if (equipmentFB.getId() != null) \{
37. equipment = equipmentService.getEquipment(equipmentFB.getId());
38. // machineFB.setVersion(machineEntity.getVersion());//修改时不获得版本号，copy时会报错
39. \}
40. BeanUtils.copyProperties(equipmentFB, equipment);
41. if (equipmentFB.getEquipTypeId() != null && equipmentFB.getEquipTypeId() != 0) \{
42. equipment.setEquipType(equipTypeService.getEquipType(equipmentFB.getEquipTypeId()));
43. \}
44. try \{
45. equipmentService.save(equipment);
46. \} catch (DataIntegrityViolationException e) \{
47. map.addAttribute(”message”, Constant.MESSAGE\_EQUIPMENTCONTROLLER\_NUMBER\_EXEIT);
48. if(equipmentFB.getEquipTypeId() != null && equipmentFB.getEquipTypeId() != 0)\{
49. EquipType equipType = equipTypeService.findOne(equipmentFB.getEquipTypeId());
50. equipmentFB.setEquipTypeName(equipType.getName());
51. \}
52. map.addAttribute(”equipment”, equipmentFB);
53. return “/nbs/equipment/edit”;
54. \}
55. return “redirect:/nbs/equipment”;
56. 
57. \}

@RequestMapping(value = "/save", method = RequestMethod.POST)
 public String save(@ModelAttribute @Valid EquipmentFB equipmentFB, BindingResult result, ModelMap map) {
 if (result.hasErrors()) {
 map.addAttribute("message", ErrorUtils.fetchAllErrorMessages(result));
 if(equipmentFB.getEquipTypeId() != null && equipmentFB.getEquipTypeId() != 0){
 EquipType equipType = equipTypeService.findOne(equipmentFB.getEquipTypeId());
 equipmentFB.setEquipTypeName(equipType.getName());
 }
 map.addAttribute("equipment", equipmentFB);
 return "/nbs/equipment/edit";
 }
 String error = "";
 
 if(StringUtils.isEmpty(equipmentFB.getNumber())){
 error = error +Constant.ERROR_EQUIPMENTCONTROLLER_NUMBER_CANNOT_NULL;
 }
 
 if(StringUtils.isEmpty(equipmentFB.getName())){
 error = error +Constant.ERROR_EQUIPMENTCONTROLLER_NAME_CANNOT_NULL;
 }
 
 if(equipmentFB.getEquipTypeId() == null || equipmentFB.getEquipTypeId() == 0){
 error = error +Constant.ERROR_EQUIPMENTCONTROLLER_TYPE_CANNOT_NULL;
 }
 if (!"".equals(error)) {
 map.addAttribute("message", error);
 if(equipmentFB.getEquipTypeId() != null && equipmentFB.getEquipTypeId() != 0){
 EquipType equipType = equipTypeService.findOne(equipmentFB.getEquipTypeId());
 equipmentFB.setEquipTypeName(equipType.getName());
 }
 map.addAttribute("equipment", equipmentFB);
 return "/nbs/equipment/edit";
 }
 
 Equipment equipment = new Equipment();
 if (equipmentFB.getId() != null) {
 equipment = equipmentService.getEquipment(equipmentFB.getId());
 // machineFB.setVersion(machineEntity.getVersion());//修改时不获得版本号，copy时会报错
 }
 BeanUtils.copyProperties(equipmentFB, equipment);
 if (equipmentFB.getEquipTypeId() != null && equipmentFB.getEquipTypeId() != 0) {
 equipment.setEquipType(equipTypeService.getEquipType(equipmentFB.getEquipTypeId()));
 }
 try {
 equipmentService.save(equipment);
 } catch (DataIntegrityViolationException e) {
 map.addAttribute("message", Constant.MESSAGE_EQUIPMENTCONTROLLER_NUMBER_EXEIT);
 if(equipmentFB.getEquipTypeId() != null && equipmentFB.getEquipTypeId() != 0){
 EquipType equipType = equipTypeService.findOne(equipmentFB.getEquipTypeId());
 equipmentFB.setEquipTypeName(equipType.getName());
 }
 map.addAttribute("equipment", equipmentFB);
 return "/nbs/equipment/edit";
 }
 return "redirect:/nbs/equipment";
 
 }