struts2输入验证--验证框架(xml文件验证)

struts2验证框架分为字段(field校验--面向字段、字段优先)校验器和非字段(validator--校验面向validator、validator优先)校验器.

通过验证框架验证，只需要删除掉原来validate()方法中的内容(这篇blog是基于"struts2输入验证--validate()验证"的)，再增加一个xml文件即可：一个Action对应一个验证xml(RegisterAction.class-->RegisterAction-validation.xml并在同一个包中，注意文件名的对应关系)

1.基于field的验证框架

1. <?xml version="1.0" encoding="UTF-8"?>
2. <!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0//EN" "http://www.opensymphony.com/xwork/xwork-validator-1.0.dtd">
3. <validators>
5.     <field name="username">
6.         <field-validator type="requiredstring">
7.             <message>username shouldn't be null!!!</message>
8.         </field-validator>
9.         
10.         <field-validator type="stringlength">
11.             <param name="minLength">6</param>
12.             <param name="maxLength">10</param>
13.             <message>username should be between ${minLength} and ${maxLength}</message>
14.         </field-validator>
15.     </field>
16.     
17.     <field name="password">
18.         <field-validator type="requiredstring">
19.             <message>password shouldn't be null!!!</message>
20.         </field-validator>
21.         
22.         <field-validator type="stringlength">
23.             <param name="minLength">6</param>
24.             <param name="maxLength">10</param>
25.             <message>password should be between ${minLength} and ${maxLength}</message>
26.         </field-validator>
27.     </field>
28.     
29.     <field name="repassword">
30.         <field-validator type="requiredstring">
31.             <message>repassword shouldn't be null!!!</message>
32.         </field-validator>
33.         
34.         <field-validator type="stringlength">
35.             <param name="minLength">6</param>
36.             <param name="maxLength">10</param>
37.             <message>repassword should be between ${minLength} and ${maxLength}</message>
38.         </field-validator>
39.     </field>
40.     
41.     <field name="age">
42.         <field-validator type="int">
43.             <param name="min">1</param>
44.             <param name="max">150</param>
45.             <message>age should be between ${min} and ${max}</message>
46.         </field-validator>
47.     </field>
48.     
49.     <field name="birthday">
50.         <field-validator type="required">
51.             <message>birthday shouldn't be null!!!</message>
52.         </field-validator>
53.         
54.         <field-validator type="date">
55.             <param name="min">2001-01-01</param>
56.             <param name="max">2003-08-08</param>
57.             <message>birthday should be between ${min} and ${max}</message>
58.         </field-validator>
59.     </field>
60.     
61.     <field name="graduation">
62.         <field-validator type="required">
63.             <message>graduation shouldn't be null!!!</message>
64.         </field-validator>
65.         
66.         <field-validator type="date">
67.             <param name="min">2003-08-08</param>
68.             <param name="max">2008-08-08</param>
69.             <message>graduation should be between ${min} and ${max}</message>
70.         </field-validator>
71.     </field>
72. </validators>

2.基于validator的验证框架

1. <?xml version="1.0" encoding="UTF-8"?>
2. <!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0//EN" "http://www.opensymphony.com/xwork/xwork-validator-1.0.dtd">
3. <validators>
4.     <validator type="requiredstring">
5.         <param name="fieldName">username</param>
6.         <param name="fieldName">password</param>
7.         <param name="fieldName">repassword</param>
8.         <message>username|password|repassword shouldn't be null!!!</message>
9.     </validator>
10.     
11.     <validator type="stringlength">
12.         <param name="fieldName">username</param>
13.         <param name="fieldName">password</param>
14.         <param name="fieldName">repassword</param>
15.         <param name="minLength">6</param>
16.         <param name="maxLength">10</param>
17.         <message>username|password|repassword should be between ${minLength} and ${maxLength}</message>
18.     </validator>
19.     
20.     <validator type="int">
21.         <param name="min">1</param>
22.         <param name="max">150</param>
23.         <message>age should be between ${min} and ${max}</message>
24.     </validator>
25.     
26.     <validator type="required">
27.         <param name="fieldName">birthday</param>
28.         <param name="fieldName">graduation</param>
29.         <message>birthday|graduation shouldn't be null!!!</message>
30.     </validator>
31.     
32.     <validator type="date">
33.         <param name="fieldName">birthday</param>
34.         <param name="fieldName">graduation</param>
35.         <param name="min">2003-08-08</param>
36.         <param name="max">2008-08-08</param>
37.         <message>birthday|graduation should be between ${min} and ${max}</message>
38.     </validator>
39. </validators>

其他文件的内容不变(即和上一篇blog：validate()方法验证时的一致)

struts2与struts1不同，struts1在配置验证框架时需要配置struts-config.xml，但struts2在配置验证框架时不再需要配置struts.xml