Struts2（三）struts2处理请求参数及其校验

// 页面： 
        用户名  <input type="text" name="user.username" /> <br/>  ----- 基于OGNL表达式的写法
// Action：
        public class RegistAction2 extends ActionSupport {
            private User user;
            public void setUser(User user) {
                this.user = user;
            }

            public User getUser() {
                return user;
            }
        }

// 页面：
        用户名  <input type="text" name="username" /> <br/> 
// Action
public class Login3Action extends ActionSupport implements ModelDriven<User> {
    private User user = new User();
    public User getModel() {
        return user;
    }
}

// 页面：
    产品名称 <input type="text" name="products[0].name" /><br/>
// Action ：

public class ProductAction extends ActionSupport {
    private List<Product> products;
    public List<Product> getProducts() {
        return products;
    }
    public void setProducts(List<Product> products) {
        this.products = products;
    }
}

// 页面：
              产品名称 <input type="text" name="map[‘one‘].name" /><br/>  =======one是map的键值
// Action :
              public class ProductAction2 extends ActionSupport {
                     private Map<String, Product> map;
                     public Map<String, Product> getMap() {
                            return map;
                     }
                     public void setMap(Map<String, Product> map) {
                            this.map = map;
                     }
              } 

required  必填校验器
<field-validator type="required">
       <message>性别不能为空!</message>
</field-validator>

requiredstring  必填字符串校验器
<field-validator type="requiredstring">
       <param name="trim">true</param>
       <message>用户名不能为空!</message>
</field-validator>

stringlength：字符串长度校验器
<field-validator type="stringlength">
    <param name="maxLength">10</param>
    <param name="minLength">2</param>
    <param name="trim">true</param>
    <message><![CDATA[产品名称应在2-10个字符之间]]></message>
</field-validator>

int：整数校验器
<field-validator type="int">
    <param name="min">1</param>
    <param name="max">150</param>
    <message>年龄必须在1-150之间</message>
</field-validator>

date: 日期校验器
<field-validator type="date">
    <param name="min">1900-01-01</param>
    <param name="max">2050-02-21</param>
    <message>生日必须在${min}到${max}之间</message>
</field-validator>

url:  网络路径校验器
<field-validator type="url">
    <message>主页地址必须是一个有效网址</message>
</field-validator>

email：邮件地址校验器
<field-validator type="email">
    <message>电子邮件地址无效</message>
</field-validator>

regex：正则表达式校验器
<field-validator type="regex">
     <param name="regexExpression"><![CDATA[^13\d{9}$]]></param>
     <message>手机号格式不正确!</message>
</field-validator>

fieldexpression : 字段表达式校验
<field-validator type="fieldexpression">
       <param name="expression"><![CDATA[(password==repassword)]]></param>
       <message>两次密码输入不一致</message>
</field-validator>