oyhk 学习笔记

spring MongoDB 集成(分页),这次的分页功能.是在spring MongoDB 集成crud操作(简单封装)基础上添加的,希望对操作spring mongodb 集成的朋友们有所帮助,那么,直接看代码吧..

首页创建分页类

Pagination.java

Java代码

1. package com.mkfree.framework.common.page;
2. import java.util.List;
3. /**
4. * 分页数据类
5. *
6. * @author hk
7. *
8. * 2012-10-26 下午8:23:15
9. */
10. public class Pagination{
11. /**
12. * 一页数据默认20条
13. */
14. private int pageSize = 20;
15. /**
16. * 当前页码
17. */
18. private int pageNo;
19. /**
20. * 上一页
21. */
22. private int upPage;
23. /**
24. * 下一页
25. */
26. private int nextPage;
27. /**
28. * 一共有多少条数据
29. */
30. private long totalCount;
31. /**
32. * 一共有多少页
33. */
34. private int totalPage;
35. /**
36. * 数据集合
37. */
38. private Listdatas;
39. /**
40. * 分页的url
41. */
42. private String pageUrl;
43. /**
44. * 获取第一条记录位置
45. *
46. * @return
47. */
48. public int getFirstResult() {
49. return (this.getPageNo() - 1) * this.getPageSize();
50. }
51. /**
52. * 获取最后记录位置
53. *
54. * @return
55. */
56. public int getLastResult() {
57. return this.getPageNo() * this.getPageSize();
58. }
59. /**
60. * 计算一共多少页
61. */
62. public void setTotalPage() {
63. this.totalPage = (int) ((this.totalCount % this.pageSize > 0) ? (this.totalCount / this.pageSize + 1)
64. : this.totalCount / this.pageSize);
65. }
66. /**
67. * 设置 上一页
68. */
69. public void setUpPage() {
70. this.upPage = (this.pageNo > 1) ? this.pageNo - 1 : this.pageNo;
71. }
72. /**
73. * 设置下一页
74. */
75. public void setNextPage() {
76. this.nextPage = (this.pageNo == this.totalPage) ? this.pageNo : this.pageNo + 1;
77. }
78. public int getNextPage() {
79. return nextPage;
80. }
81. public int getTotalPage() {
82. return totalPage;
83. }
84. public int getUpPage() {
85. return upPage;
86. }
87. public int getPageSize() {
88. return pageSize;
89. }
90. public void setPageSize(int pageSize) {
91. this.pageSize = pageSize;
92. }
93. public int getPageNo() {
94. return pageNo;
95. }
96. public void setPageNo(int pageNo) {
97. this.pageNo = pageNo;
98. }
99. public long getTotalCount() {
100. return totalCount;
101. }
102. public void setTotalCount(long totalCount2) {
103. this.totalCount = totalCount2;
104. }
105. public ListgetDatas() {
106. return datas;
107. }
108. public void setDatas(Listdatas) {
109. this.datas = datas;
110. }
111. public String getPageUrl() {
112. return pageUrl;
113. }
114. public void setPageUrl(String pageUrl) {
115. this.pageUrl = pageUrl;
116. }
117. public Pagination(int pageNo, int pageSize, long totalCount2) {
118. this.setPageNo(pageNo);
119. this.setPageSize(pageSize);
120. this.setTotalCount(totalCount2);
121. this.init();
122. }
123. /**
124. * 初始化计算分页
125. */
126. private void init() {
127. this.setTotalPage();// 设置一共页数
128. this.setUpPage();// 设置上一页
129. this.setNextPage();// 设置下一页
130. }
131. }

package com.mkfree.framework.common.page;import java.util.List;/*** 分页数据类* * @author hk* *         2012-10-26 下午8:23:15*/
public class Pagination{/*** 一页数据默认20条*/private int pageSize = 20;/*** 当前页码*/private int pageNo;/*** 上一页*/private int upPage;/*** 下一页*/private int nextPage;/*** 一共有多少条数据*/private long totalCount;/*** 一共有多少页*/private int totalPage;/*** 数据集合*/private Listdatas;/*** 分页的url*/private String pageUrl;/*** 获取第一条记录位置* * @return*/public int getFirstResult() {return (this.getPageNo() - 1) * this.getPageSize();}/*** 获取最后记录位置* * @return*/public int getLastResult() {return this.getPageNo() * this.getPageSize();}/*** 计算一共多少页*/public void setTotalPage() {this.totalPage = (int) ((this.totalCount % this.pageSize > 0) ? (this.totalCount / this.pageSize + 1): this.totalCount / this.pageSize);}/*** 设置 上一页*/public void setUpPage() {this.upPage = (this.pageNo > 1) ? this.pageNo - 1 : this.pageNo;}/*** 设置下一页*/public void setNextPage() {this.nextPage = (this.pageNo == this.totalPage) ? this.pageNo : this.pageNo + 1;}public int getNextPage() {return nextPage;}public int getTotalPage() {return totalPage;}public int getUpPage() {return upPage;}public int getPageSize() {return pageSize;}public void setPageSize(int pageSize) {this.pageSize = pageSize;}public int getPageNo() {return pageNo;}public void setPageNo(int pageNo) {this.pageNo = pageNo;}public long getTotalCount() {return totalCount;}public void setTotalCount(long totalCount2) {this.totalCount = totalCount2;}public ListgetDatas() {return datas;}public void setDatas(Listdatas) {this.datas = datas;}public String getPageUrl() {return pageUrl;}public void setPageUrl(String pageUrl) {this.pageUrl = pageUrl;}public Pagination(int pageNo, int pageSize, long totalCount2) {this.setPageNo(pageNo);this.setPageSize(pageSize);this.setTotalCount(totalCount2);this.init();}/*** 初始化计算分页*/private void init() {this.setTotalPage();// 设置一共页数this.setUpPage();// 设置上一页this.setNextPage();// 设置下一页}
}

然后,我们看回

MongodbBaseDao.java 添加了以下分页的代码

Java代码

1. package com.mkfree.framework.common.mongodb;
2. import java.util.List;
3. import org.springframework.data.mongodb.core.MongoTemplate;
4. import org.springframework.data.mongodb.core.query.Query;
5. import org.springframework.data.mongodb.core.query.Update;
6. import com.mkfree.framework.common.page.Pagination;
7. /**
8. * mongodb　基础操作类
9. *
10. * @author oyhk
11. *
12. * 2013-1-22下午5:28:26
13. */
14. public abstract class MongodbBaseDao{
15. /**
16. * 通过条件查询,查询分页结果
17. *
18. * @param pageNo
19. * @param pageSize
20. * @param query
21. * @return
22. */
23. public PaginationgetPage(int pageNo, int pageSize, Query query) {
24. long totalCount = this.mongoTemplate.count(query, this.getEntityClass());
25. Paginationpage = new Pagination(pageNo, pageSize, totalCount);
26. query.skip(page.getFirstResult());// skip相当于从那条记录开始
27. query.limit(pageSize);// 从skip开始,取多少条记录
28. Listdatas = this.find(query);
29. page.setDatas(datas);
30. return page;
31. }
32. //.......其他代码,请下载源代码吧
33. }