struts2、webwork 循环的应用，实现for功能

struts2、webwork 循环的使用，实现for功能

在struts2及webwork中要实现如：

1. /* ?
2. *?$Id:?Counter.java?471756?2006-11-06?15:01:43Z?husted?$ ?
3. * ?
4. *?Licensed?to?the?Apache?Software?Foundation?(ASF)?under?one ?
5. *?or?more?contributor?license?agreements.???See?the?NOTICE?file ?
6. *?distributed?with?this?work?for?additional?information ?
7. *?regarding?copyright?ownership.???The?ASF?licenses?this?file ?
8. *?to?you?under?the?Apache?License,?Version?2.0?(the ?
9. *?"License");?you?may?not?use?this?file?except?in?compliance ?
10. *?with?the?License.???You?may?obtain?a?copy?of?the?License?at ?
11. * ?
12. *??http://www.apache.org/licenses/LICENSE-2.0 ?
13. * ?
14. *?Unless?required?by?applicable?law?or?agreed?to?in?writing, ?
15. *?software?distributed?under?the?License?is?distributed?on?an ?
16. *?"AS?IS"?BASIS,?WITHOUT?WARRANTIES?OR?CONDITIONS?OF?ANY ?
17. *?KIND,?either?express?or?implied.???See?the?License?for?the ?
18. *?specific?language?governing?permissions?and?limitations ?
19. *?under?the?License. ?
20. */??
21. package?org.apache.struts2.util; ??
22. ??
23. import?java.io.Serializable; ??
24. ??
25. ??
26. /** ?
27. *?A?bean?that?can?be?used?to?keep?track?of?a?counter. ?
28. *?

    ?

    ?
29. *?Since?it?is?an?Iterator?it?can?be?used?by?the?iterator?tag ?
30. * ?
31. */??
32. public?class?Counter?implements?java.util.Iterator,?Serializable?{ ??
33. ??
34. ?????private?static?final?long?serialVersionUID?=?2796965884308060179L; ??
35. ??
36. ?????boolean?wrap?=?false; ??
37. ??
38. ?????//?Attributes?---------------------------------------------------- ??
39. ?????long?first?=?1; ??
40. ?????long?current?=?first; ??
41. ?????long?interval?=?1; ??
42. ?????long?last?=?-1; ??
43. ??
44. ??
45. ?????public?void?setAdd(long?addition)?{ ??
46. ?????????current?+=?addition; ??
47. ?????} ??
48. ??
49. ?????public?void?setCurrent(long?current)?{ ??
50. ?????????this.current?=?current; ??
51. ?????} ??
52. ??
53. ?????public?long?getCurrent()?{ ??
54. ?????????return?current; ??
55. ?????} ??
56. ??
57. ?????public?void?setFirst(long?first)?{ ??
58. ?????????this.first?=?first; ??
59. ?????????current?=?first; ??
60. ?????} ??
61. ??
62. ?????public?long?getFirst()?{ ??
63. ?????????return?first; ??
64. ?????} ??
65. ??
66. ?????public?void?setInterval(long?interval)?{ ??
67. ?????????this.interval?=?interval; ??
68. ?????} ??
69. ??
70. ?????public?long?getInterval()?{ ??
71. ?????????return?interval; ??
72. ?????} ??
73. ??
74. ?????public?void?setLast(long?last)?{ ??
75. ?????????this.last?=?last; ??
76. ?????} ??
77. ??
78. ?????public?long?getLast()?{ ??
79. ?????????return?last; ??
80. ?????} ??
81. ??
82. ?????//?Public?-------------------- ??
83. ?????public?long?getNext()?{ ??
84. ?????????long?next?=?current; ??
85. ?????????current?+=?interval; ??
86. ??
87. ?????????if?(wrap?&&?(current?>?last))?{ ??
88. ?????????????current?-=?((1?+?last)?-?first); ??
89. ?????????} ??
90. ??
91. ?????????return?next; ??
92. ?????} ??
93. ??
94. ?????public?long?getPrevious()?{ ??
95. ?????????current?-=?interval; ??
96. ??
97. ?????????if?(wrap?&&?(current?<?first))?{ ??
98. ?????????????current?+=?(last?-?first?+?1); ??
99. ?????????} ??
100. ??
101. ?????????return?current; ??
102. ?????} ??
103. ??
104. ?????public?void?setWrap(boolean?wrap)?{ ??
105. ?????????this.wrap?=?wrap; ??
106. ?????} ??
107. ??
108. ?????public?boolean?isWrap()?{ ??
109. ?????????return?wrap; ??
110. ?????} ??
111. ??
112. ?????public?boolean?hasNext()?{ ??
113. ?????????return?((last?==?-1)?||?wrap)???true?:?(current?<=?last); ??
114. ?????} ??
115. ??
116. ?????public?Object?next()?{ ??
117. ?????????return?new?Long(getNext()); ??
118. ?????} ??
119. ??
120. ?????public?void?remove()?{ ??
121. ?????????//?Do?nothing ??
122. ?????} ??
123. } ??
124. ??
</s:iterator>
</s:bean>