struts2学习笔记（九）struts2内置校验

1.要校验的pojo

public class User {

private String userName;

private String name;
private int age;

private String email;

private String homePage;

public String getUserName() {
return userName;
}

public void setUserName(String userName) {
this.userName = userName;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public int getAge() {
return age;
}

public void setAge(int age) {
this.age = age;
}

public String getEmail() {
return email;
}

public void setEmail(String email) {
this.email = email;
}

public String getHomePage() {
return homePage;
}

public void setHomePage(String homePage) {
this.homePage = homePage;
}

}

2.Action类

public class RegisterAction extends ActionSupport{

private static final long serialVersionUID = 1L;

private User user;

public User getUser() {
return user;
}

public void setUser(User user) {
this.user = user;
}

public String execute(){
System.out.println("注册用户："+user);
return SUCCESS;
}
}

3.struts.xml配置

<package name="manager" extends="struts-default">
<action name="registerAction" class="com.skymr.struts2.chapter3.action.RegisterAction">
<result name="success">/regSuc.jsp</result>
<result name="input">/register.jsp</result>
</action>
</package>

名为input的result是校验不通过时跳转的页面．

4.jsp代码

<s:actionerror/>
<s:form action="registerAction" method="post">
<s:textfield name="user.userName" label="用户名"></s:textfield>
<s:textfield name="user.name" label="姓名"></s:textfield>
<s:textfield name="user.age" label="年龄"></s:textfield>
<s:textfield name="user.email" label="邮件"></s:textfield>
<s:textfield name="user.homePage" label="主页"></s:textfield>
<s:submit value="注册"></s:submit>
</s:form>

<s:actionerror/>是表达式校验不通过时显示信息，不写这行而校验不过则不会显示错误信息．

５. validation.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC "-//Apache Struts//XWork Validator 1.0.2//EN" "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">
<validators>
<field name="user.userName">
<field-validator type="requiredstring">
<message>请填写用户名</message>
</field-validator>
<field-validator type="stringlength">
<param name="minLength">6</param>
<param name="maxLength">20</param>
<message>用户名长度在6-20之间</message>
</field-validator>
</field>
<field name="user.name">
<field-validator type="requiredstring">
<message>请填写姓名</message>
</field-validator>
<field-validator type="stringlength">
<param name="minLength">6</param>
<param name="maxLength">20</param>
<message>姓名长度在6-20之间</message>
</field-validator>
</field>

<field name="user.age">
<field-validator type="int">
<param name="min">18</param>
<message>年龄必须大于18岁</message>
</field-validator>
</field>
<field name="user.email">
<field-validator type="requiredstring">
<message>请填写邮件地址</message>
</field-validator>
<field-validator type="email">
<message>邮件地址格式不正确</message>
</field-validator>
</field>
<field name="user.homePage">
<field-validator type="requiredstring">
<message>请填写主页</message>
</field-validator>
<field-validator type="url">
<message>主页格式不正确</message>
</field-validator>
</field>
<validator type="expression">
<param name="expression">!user.name.equals(user.userName)</param>
<message>用户名和姓名不能相同</message>
</validator>
</validators>

ps:

必须在文件开头加入语法行：

<!DOCTYPE validators PUBLIC "-//Apache Struts//XWork Validator 1.0.2//EN" "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">

文件命名方式为 action类名+"-validation.xml"

如Action名为RegisterAction，则校验配置文件名为RegisterAction-validation.xml．

doc文档里有有关校验的详解．

conversion validator
date validator
double validator
email validator
expression validator
fieldexpression validator
int validator
regex validator
required validator
requiredstring validator
short validator
stringlength validator
url validator
visitor validator
conditionalvisitor validator