Struts2的action对表单数据的验证有多种方式，可以通过覆写 validate()方法进行对该action的所有方法进行验证，也可以通过validateXxx()方法对action中指定的xxx()方法进行验证，也可以通过配置xml文件对其进行验证。
1， 覆写 validate()进行验证，action类必须继承ActionSupport，此方法将在执行指定方法前执行。
package com.my.action;
import org.apache.commons.lang3.StringUtils;
import com.my.bean.User;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
public class UserAction extends ActionSupport implements ModelDriven<User>{
private User user = new User();
@Override
public String execute() throws Exception {
return SUCCESS;
}
public String login() throws Exception {
return SUCCESS;
}
@Override
public void validate() {
if( StringUtils.isEmpty(user.getUsername())){
this.addFieldError("username", "用户名不能为空");
}
if( StringUtils.isEmpty(user.getPassword())){
this.addFieldError("password", "密码不能为空");
}
}
@Override
public User getModel() {
return this.user;
}
}
2 ，通过validateXxx()方法对指定的xxx()方法进行验证，action类必须继承ActionSupport
package com.my.action;
import org.apache.commons.lang3.StringUtils;
import com.my.bean.User;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
public class UserAction extends ActionSupport implements ModelDriven<User>{
private User user = new User();
@Override
public String execute() throws Exception {
return SUCCESS;
}
public String login() throws Exception {
return SUCCESS;
}
public void validateLogin() {
if( StringUtils.isEmpty(user.getUsername())){
this.addFieldError("username", "用户名不能为空");
}
if( StringUtils.isEmpty(user.getPassword())){
this.addFieldError("password", "密码不能为空");
}
}
@Override
public User getModel() {
return this.user;
}
}
3， 通过配置xml文件进行验证：
jsp文件：
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<s:fielderror></s:fielderror>
<h3>struts标签</h3>
<s:form namespace="/" action="userAction" method="post" theme="simple">
用户名 : <s:textfield name="username"></s:textfield> <br/>
密码 : <s:password name="password" showPassword="true"></s:password> <br/>
确认密码 : <s:password name="repassword" showPassword="true"></s:password> <br/>
生日 : <s:textfield name="birthday" ></s:textfield> <br/>
年龄 : <s:textfield name="age" ></s:textfield> <br/>
邮箱 : <s:textfield name="email" ></s:textfield> <br/>
<s:submit value="提交"></s:submit>
</s:form>
</body>
</html>
action类:
public class UserAction extends ActionSupport implements ModelDriven<User> {
private User user = new User();
@Override
public String execute() throws Exception {
System.out.println("execute" + user) ;
return SUCCESS;
}
public String login() throws Exception {
System.out.println("login" + user) ;
return SUCCESS;
}
@Override
public User getModel() {
return this.user;
}
}
xml文件的配置，
文件名为:action类名-validation.xml （eg: UserAction-validation.xml）,
如果是对action中单个方法进行验证，
文件名为:Action类名-在xml配置Action名称-validation.xml（eg:UserAction-userAction-validation.xml）
文件位置放置在与该action同包的位置。
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC
"-//Apache Struts//XWork Validator 1.0.3//EN"
"http://struts.apache.org/dtds/xwork-validator-1.0.3.dtd">
<validators>
<!-- username -->
<field name="username">
<!-- 必填 -->
<field-validator type="requiredstring">
<message key="usernameRequiredString"></message>
</field-validator>
<!-- 长度 -->
<field-validator type="stringlength">
<param name="maxLength">18</param>
<param name="minLength">6</param>
<message><![CDATA[用户必须填写${minLength}-${maxLength}]]></message>
</field-validator>
</field>
<!-- 密码 password-->
<field name="password">
<!-- 必填 -->
<field-validator type="requiredstring">
<message><![CDATA[密码必须填写 execute]]></message>
</field-validator>
<!-- 长度 A-Za-z0-9_- 或 /w- -->
<field-validator type="regex">
<!-- 正在表达式的内容 -->
<param name="regexExpression"><![CDATA[^[/w-]{6,12}$]]></param>
<message><![CDATA[密码必须6-12，字母数字和下划线的组合]]></message>
</field-validator>
</field>
<!-- 确认密码 -->
<field name="repassword">
<field-validator type="fieldexpression">
<param name="expression"><![CDATA[password == repassword]]></param>
<message><![CDATA[密码 与确认密码不一致]]></message>
</field-validator>
</field>
<!-- 生日 -->
<field name="birthday">
<field-validator type="date">
<param name="max">2014-01-01</param>
<param name="min">1990-01-01</param>
<message><![CDATA[日期必须在${min} - ${max}]]></message>
</field-validator>
</field>
<!-- 邮箱 -->
<field name="email">
<field-validator type="email">
<message>邮箱格式不正确</message>
</field-validator>
</field>
<!-- 年龄 -->
<field name="age">
<field-validator type="int">
<param name="max">120</param>
<param name="min">23</param>
<message><![CDATA[日期必须在${min} - ${max}]]></message>
</field-validator>
</field>
</validators>
原创文章，作者：奋斗，如若转载，请注明出处：https://blog.ytso.com/12075.html