java Tapestry5 <select>

zhangrong108 · 发表于 2013-2-3 10:16:17

16.public class Brand {
17.
18. private String id;
19. private String description;
20.
21. public Brand() {}
22.
23. public Brand(String id, String description) {
24.       this.id = id;
25.       this.description = description;
26. }
27.
28. public String getId() {
29.       return id;
30. }
31.
32. public String getDescription() {
33.       return description;
34. }
35.
36.}
37.
38.
39.Test.java
40.
41.public class Test {
42.
43. @Persist
44. private Brand brand;
45.
46. @Persist
47. private List<Brand> brands;
48.
49. public Brand getBrand() {
50.       return brand;
51. }
52.
53. public void setBrand(Brand brand) {
54.       this.brand = brand;
55. }
56.
57. private List<Brand> getBrands()
58. {
59.       if(brands == null) {
60.          brands = new ArrayList<Brand>();
61.          brands.add(new Brand("1", "Brand 1"));
62.          brands.add(new Brand("2", "Brand 2"));
63.          brands.add(new Brand("3", "Brand 3"));
64.          brands.add(new Brand("4", "Brand 4"));
65.       }
66.
67.       return brands;
68. }
69.
70. public BrandSelectModel getBrandSelectModel() {
71.       return new BrandSelectModel(getBrands());
72. }
73.
74. public BrandValueEncoder getBrandValueEncoder() {
75.       return new BrandValueEncoder(getBrands());
76. }
77.
78. public class BrandValueEncoder implements ValueEncoder<Brand> {
79.
80.       private List<Brand> brands;
81.
82.       public BrandValueEncoder(List<Brand> brands) {
83.          this.brands = brands;
84.       }
85.
86.       public String toClient(Brand brand) {
87.          return brand.getDescription();
88.       }
89.
90.       public Brand toValue(String string) {
91.          for(Brand brand : brands) {
92.
93.if(brand.getDescription().equals(string)) {
94.                   return brand;
95.             }
96.          }
97.          return null;
98.       }
99.
100. }
101.
102. public class BrandSelectModel implements SelectModel {
103.
104.       private List<Brand> brands;
105.
106.       public BrandSelectModel(List<Brand> brands) {
107.          this.brands = brands;
108.       }
109.
110.       public List<OptionGroupModel> getOptionGroups() {
111.          return null;
112.       }
113.
114.       public List<OptionModel> getOptions() {
115.          List<OptionModel> optionModelList = new
116.ArrayList<OptionModel>();
117.          for(Brand brand: brands) {
118.             optionModelList.add(
119.                   new OptionModelImpl(
120.                      brand.getDescription(),
121.                      false,
122.                      brand,
123.                      new String[0]
124.                   )
125.             );
126.          }
127.          return optionModelList;
128.       }
129.
130. }
131.
132.}
xml 代码

1.Test.html
2.
3.<html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd">
4.<t:form>
5.
6. <select t:type="select" t:id="brand"
7.       value="brand" model="brandSelectModel"
8.encoder="brandValueEncoder"
9.       onchange="this.form.submit();" />
10.
11. <br/>
12.
13. <t:if test="brand">
14.       ${brand.description}
15. </t:if>
16.
17.</t:form>
18.</html>

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java Tapestry5 &lt;select&gt;

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java Tapestry5 <select>