直接定义个工具类，代码如下：
1 package com.jk51.modules.wechat.web.util;
2
3 import java.util.Collections;
4 import java.util.List;
5
6 /**
7 * 版权所有(C) 2018 9 * 作者: chen
10 * 创建日期: 2018/6/20
11 * 修改记录:
12 */
13 public class ListPageUtil<T> {
14 private List<T> data;
15
16 /** 上一页 */
17 private int lastPage;
18
19 /** 当前页 */
20 private int currentPage;
21
22 /** 下一页 */
23 private int nextPage;
24 //
25 /** 每页条数 */
26 private int pageSize;
27
28 /** 总页数 */
29 private int totalPage;
30
31 /** 总数据条数 */
32 private int totalCount;
33
34 public ListPageUtil(List<T> data,int currentPage,int pageSize) {
35 if (data == null || data.isEmpty()) {
36 throw new IllegalArgumentException("data must be not empty!");
37 }
38
39 this.data = data;
40 this.pageSize = pageSize;
41 this.currentPage = currentPage;
42 this.totalCount = data.size();
43 this.totalPage = (totalCount + pageSize - 1) / pageSize;
44 this.lastPage = currentPage-1>1? currentPage-1:1;
45 this.nextPage = currentPage>=totalPage? totalPage: currentPage + 1;
46
47 }
48
49 /**
50 * 得到分页后的数据
51 * @return 分页后结果
52 */
53 // public List<T> getPagedLst() {
54 // int fromIndex = (nowPage - 1) * pageSize;
55 // if (fromIndex >= data.size()) {
56 // return Collections.emptyList();//空数组
57 // }
58 // if(fromIndex<0){
59 // return Collections.emptyList();//空数组
60 // }
61 // int toIndex = nowPage * pageSize;
62 // if (toIndex >= data.size()) {
63 // toIndex = data.size();
64 // }
65 // return data.subList(fromIndex, toIndex);
66 // }
67
68 public int getPageSize() {
69 return pageSize;
70 }
71
72 public List<T> getData() {
73 int fromIndex = (currentPage - 1) * pageSize;
74 if (fromIndex >= data.size()) {
75 return Collections.emptyList();//空数组
76 }
77 if(fromIndex<0){
78 return Collections.emptyList();//空数组
79 }
80 int toIndex = currentPage * pageSize;
81 if (toIndex >= data.size()) {
82 toIndex = data.size();
83 }
84 return data.subList(fromIndex, toIndex);
85 }
86 public int getLastPage() {
87 return lastPage;
88 }
89
90 public int getCurrentPage() {
91 return currentPage;
92 }
93
94 public int getNextPage() {
95 return nextPage;
96 }
97
98 public int getTotalPage() {
99 return totalPage;
100 }
101
102 public int getTotalCount() {
103 return totalCount;
104 }
105 }
