Displaytag的长数据分页[struts2]

木又寸 — Sun, 29 Jul 2007 09:39:00 GMT

1，实现rg.displaytag.pagination.PaginatedList接口

1 package org.cnup.xup.utils;
2
3 import java.util.List;
4
5 import org.displaytag.pagination.PaginatedList;
6 import org.displaytag.properties.SortOrderEnum;
7
8 public class PaginatedListImpl implements PaginatedList {
9
10     /**
11      * 当前显示的的局部数据
12      */
13     private List list;
14     /**
15      * 全部数据总数
16      */
17     private int fullListSize;
18
19     /**
20      * 每页显示数据数目
21      */
22     private int objectsPerPage;
23
24     /**
25      * 当前页数(从 1开始)
26      */
27     private int pageNumber;
28
29     /**
30      *
31      */
32     private String searchId;
33
34     /**
35      * 外部排序条件
36      */
37     private String sortCriterion;
38
39     /**
40      * 外部排序方向
41      */
42     private SortOrderEnum sortDirection;
43
44
45     setters ...
46     getters ...
a47 }
48

2，struts2 [displaytag的属性文件略]

1 /*
2  * Copyright ©2006-11-6 www.cnup.org
3  */
4 package org.cnup.xup.action;
5
6 import org.cnup.xup.utils.PaginatedListImpl;
7 import org.displaytag.properties.SortOrderEnum;
8
9 import com.opensymphony.xwork2.ActionSupport;
10 import com.opensymphony.xwork2.Preparable;
11
12 /**
13  * 通用CRUDAction的abs类
14  *
15  * @author 李亦然
16  */
17 public abstract class AbstractCRUDAction extends ActionSupport implements
18         Preparable {
19     protected int page = 1;
20     protected int pageSize = 15;
21     protected String sort = null;
22     protected String dir = "asc";
23
24     protected String selectId;
25     protected String[] selectedIds;
26
27     public void prepare() throws Exception {
28
29     }
30
31     public abstract String save() throws Exception;
32
33     public abstract String delete() throws Exception;
34
35     public abstract String get() throws Exception;
36
37     public abstract String list() throws Exception;
38
39     public String getSelectId() {
40         return selectId;
41     }
42
43     public void setSelectId(String selectId) {
44         this.selectId = selectId;
45     }
46
47     public int getPage() {
48         return page;
49     }
50
51     public void setPage(int page) {
52         this.page = page;
53     }
54
55     public int getPageSize() {
56         return pageSize;
57     }
58
59     public void setPageSize(int pageSize) {
60         this.pageSize = pageSize;
61     }
62
63     public String getSort() {
64         return sort;
65     }
66
67     public void setSort(String sort) {
68         this.sort = sort;
69     }
70
71     public String getDir() {
72         return dir;
73     }
74
75     public void setDir(String dir) {
76         this.dir = dir;
77     }
78
79     public PaginatedListImpl propPaginatedList(PaginatedListImpl p) {
80         p =new PaginatedListImpl();
81         p.setSortCriterion(sort);
82
83         if ("asc".equals(dir)) {
84             p.setSortDirection(SortOrderEnum.ASCENDING);
85         } else if ("desc".equals(dir)) {
86             p.setSortDirection(SortOrderEnum.DESCENDING);
87         }
88         p.setObjectsPerPage(pageSize);
89         p.setPageNumber(page);
90         return p;
91     }
92
93 }
94

3，PersonAction

1 /*
2  * gen from template[struts2.action.crudaction]
3  */
4 package org.cnup.xup.action;
5
6 import org.cnup.xup.model.Person;
7 import org.cnup.xup.service.PersonService;
8 import org.cnup.xup.utils.PaginatedListImpl;
9 import com.opensymphony.xwork2.Action;
10
11 @SuppressWarnings("serial")
12 public class PersonAction extends AbstractCRUDAction {
13
14     private PersonService personService;
15     private PaginatedListImpl persons;
16     private Person person;
17
18
19     public PersonAction() {
20
21     }
22
23     public PersonService getPersonService() {
24         return personService;
25     }
26
27     public void setPersonService(PersonService personService) {
28         this.personService = personService;
29     }
30     @Override
31     public String list() {
32         persons=this.propPaginatedList(persons);
33         persons.setFullListSize(personService.count());
34
35         persons.setList(personService.findPartial((page-1)*pageSize,pageSize,sort,dir));
36
37         return Action.SUCCESS;
38     }
39
40     public String save() {
41         this.personService.save(person);
42         this.person = new Person();
43         return Action.SUCCESS;
44     }
45
46     @Override
47     public String delete() throws Exception {
48         if (selectId != null)
49             personService.remove(selectId);
50         return Action.SUCCESS;
51     }
52
53
54
55
56
57
58     public Person getPerson() {
59         return person;
60     }
61
62     public void setPerson(Person person) {
63         this.person = person;
64     }
65
66     @Override
67     public String delete() throws Exception {
68         if (selectId != null)
69             personService.remove(selectId);
70         return Action.SUCCESS;
71     }
72
73     @Override
74     public String get() throws Exception {
75         person=personService.find(selectId);
76         return Action.SUCCESS;
77     }
78
79
80
81
82
83
84
85     public PaginatedListImpl getPersons() {
86         return persons;
87     }
88
89
90 }

木又寸 2007-07-29 17:39 发表评论

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Displaytag的长数据分页[struts2]