以下是介绍利用List的subList方法实现对List分页，废话不多说了，直接看代码把
java" id="highlighter_915564">
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
|
/** *//** * List分页 * 实现：利用List的获取子List方法，实现对List的分页 * @author 显武 * @date 2010-1-8 16:27:31 * */ import java.util.ArrayList; import java.util.List; public class PageModel { private int page = 1; // 当前页 public int totalPages = 0; // 总页数 private int pageRecorders;// 每页5条数据 private int totalRows = 0; // 总数据数 private int pageStartRow = 0;// 每页的起始数 private int pageEndRow = 0; // 每页显示数据的终止数 private boolean hasNextPage = false; // 是否有下一页 private boolean hasPreviousPage = false; // 是否有前一页 private List list; // private Iterator it; public PageModel(List list, int pageRecorders) { init(list, pageRecorders);// 通过对象集，记录总数划分 } /** *//** * 初始化list，并告之该list每页的记录数 * @param list * @param pageRecorders */ public void init(List list, int pageRecorders) { this.pageRecorders = pageRecorders; this.list = list; totalRows = list.size(); // it = list.iterator(); hasPreviousPage = false; if ((totalRows % pageRecorders) == 0) { totalPages = totalRows / pageRecorders; } else { totalPages = totalRows / pageRecorders + 1; } if (page >= totalPages) { hasNextPage = false; } else { hasNextPage = true; } if (totalRows < pageRecorders) { this.pageStartRow = 0; this.pageEndRow = totalRows; } else { this.pageStartRow = 0; this.pageEndRow = pageRecorders; } } // 判断要不要分页 public boolean isNext() { return list.size() > 5; } public void setHasPreviousPage(boolean hasPreviousPage) { this.hasPreviousPage = hasPreviousPage; } public String toString(int temp) { String str = Integer.toString(temp); return str; } public void description() { String description = "共有数据数:" + this.getTotalRows() + "共有页数: " + this.getTotalPages() + "当前页数为:" + this.getPage() + " 是否有前一页: " + this.isHasPreviousPage() + " 是否有下一页:" + this.isHasNextPage() + " 开始行数:" + this.getPageStartRow() + " 终止行数:" + this.getPageEndRow(); System.out.println(description); } public List getNextPage() { page = page + 1; disposePage(); System.out.println("用户凋用的是第" + page + "页"); this.description(); return getObjects(page); } /** *//** * 处理分页 */ private void disposePage() { if (page == 0) { page = 1; } if ((page - 1) > 0) { hasPreviousPage = true; } else { hasPreviousPage = false; } if (page >= totalPages) { hasNextPage = false; } else { hasNextPage = true; } } public List getPreviousPage() { page = page - 1; if ((page - 1) > 0) { hasPreviousPage = true; } else { hasPreviousPage = false; } if (page >= totalPages) { hasNextPage = false; } else { hasNextPage = true; } this.description(); return getObjects(page); } /** *//** * 获取第几页的内容 * * @param page * @return */ public List getObjects(int page) { if (page == 0) this.setPage(1); else this.setPage(page); this.disposePage(); if (page * pageRecorders < totalRows) {// 判断是否为最后一页 pageEndRow = page * pageRecorders; pageStartRow = pageEndRow - pageRecorders; } else { pageEndRow = totalRows; pageStartRow = pageRecorders * (totalPages - 1); } List objects = null; if (!list.isEmpty()) { objects = list.subList(pageStartRow, pageEndRow); } //this.description(); return objects; } public List getFistPage() { if (this.isNext()) { return list.subList(0, pageRecorders); } else { return list; } } public boolean isHasNextPage() { return hasNextPage; } public void setHasNextPage(boolean hasNextPage) { this.hasNextPage = hasNextPage; } public List getList() { return list; } public void setList(List list) { this.list = list; } public int getPage() { return page; } public void setPage(int page) { this.page = page; } public int getPageEndRow() { return pageEndRow; } public void setPageEndRow(int pageEndRow) { this.pageEndRow = pageEndRow; } public int getPageRecorders() { return pageRecorders; } public void setPageRecorders(int pageRecorders) { this.pageRecorders = pageRecorders; } public int getPageStartRow() { return pageStartRow; } public void setPageStartRow(int pageStartRow) { this.pageStartRow = pageStartRow; } public int getTotalPages() { return totalPages; } public void setTotalPages(int totalPages) { this.totalPages = totalPages; } public int getTotalRows() { return totalRows; } public void setTotalRows(int totalRows) { this.totalRows = totalRows; } public boolean isHasPreviousPage() { return hasPreviousPage; } } //测试类： package com.Gavin.tools.util; import java.util.ArrayList; import java.util.List; public class TestPagerModel { public static void main(String args[]) { List<String> list = new ArrayList<String>(); list.add("a"); list.add("b"); list.add("c"); list.add("d"); list.add("e"); list.add("f"); list.add("g"); list.add("h"); list.add("h"); list.add("i"); list.add("j"); list.add("k"); list.add("l"); list.add("m"); PageModel pm = new PageModel(list, 5); List sublist = pm.getObjects(3); for(int i = 0; i < sublist.size(); i++) { System.out.println(sublist.get(i)); } System.out.println(sublist.get(0)); } } |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
