通过struts2中延续自xwork框架的validation.xml配置方式进行数据校验，因struts2 下存在三种请求参数的注入方式，固按照不同注入方式对validation.xml的配置进行总结。
一、Action类下直接参数的校验配置：
- web.xml文件配置struts过滤器：
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
- bean文件：因直接在action类下进行注入及验证，不涉及bean文件，固略；
- RegistServiceDao文件存储注册业务逻辑，略；
- Action文件：
package com.action
public class RegAction extends ActionSupport{
private String name;
private String password;
private String gender;
private String email;
private String address;
private User userInfo;
//setter和getter方法略;
public User setInfo(){
User info = new User();
info.setname(this.name);
info.setpassword(this.password);
info.setgender(this.gender);
info.setemail(this.email);
info.setaddress(this.address);
return info;
}
public String regist(){
RegistServiceDao rsd = new RegistServiceDao();
userInfo = setInfo();
if(rsd.regist(usrInfo)){
return "success";
}else{
return "input";
}
}
}
- struts配置文件配置action：
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd"> <struts>
<package name="default" extends="struts-defualt">
<action name="regist" class="com.action.RegistAction">
<result name="success">success.jsp</result>
<result name="INPUT">regist.jsp</result>
</action>
</package>
</struts>
****
- validation.xml文件配置校验器，命名规则为<ActionClassName>-<aliasName>-validation.xml，文件必须放在action文件的同目录下;
RegActoin-regiest-validation.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC
"-//OpenSymphony Group//XWork Validator 1.0.2//EN"
"http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd"> <validators>
<feild name="name">
<feild-validator type="requiredString">
<message>用户名不能为空</message>
</feild-validator>
</feild>
<feild name="password">
<feild-validator type="requiredString">
<message>密码不能为空</message>
</feild-validator>
</feild>
<feild name="gender">
<feild-validator type="requiredString">
<message>性别不能为空</message>
</feild-validator>
</feild>
<feild name="email">
<feild-validator type="email">
<message>油箱格式不正确</message>
</feild-validator>
</feild>
</validators>
二、DomainModel的注入方式下的数据校验：
- web.xml配置文件无变化，同第一种；
- bean文件，包含setter和getter的完整bean文件：
package com.entity
public class User{
private String name;
private String password;
private String gender;
private String email;
private String address;
public User(){}
public User(String name,String password,String gender,String email,String address){
this.name = name;
this.password = password;
this.gender = gender;
this.email = email;
this.address = address;
}
//setter和getter方法略
}
- RegistServiceDao文件存储注册业务逻辑，略；
- Action文件，利用User对象注入数据，添加user的getter和setter方法，同时调用字段值时亦通过对象（user.getName())：
package com.action
public class RegAction extends ActionSupport{
//无需实例化User
private User user;
public User getUser(){
return user;
}
public void setUser(User user){
this.user = user;
}
public String regist(){
RegistServiceDao rsd = new RegistServiceDao();
if(rsd.regist(user)){
return "success";
}else{
return "input";
}
}
}
- struts配置文件配置Action，同第一种；
********
- validation.xml文件配置配置校验器，校验user对象的字段需通过visitor校验器，配置如下：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC
"-//OpenSymphony Group//XWork Validator 1.0.2//EN"
"http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd"> <validators>
<field name="user">
<field-validator type="visitor">
<param name="context">abc</param>
<param name="appendPrefix">true</param>
</field-validator>
</field>
</validators>
- User-abc-validation.xml文件配置visitor校验，命名规则为类似Action的校验配置文件，文件位置亦必须与实体类同一目录下：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC
"-//OpenSymphony Group//XWork Validator 1.0.2//EN"
"http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd"> <validators>
<feild name="name">
<feild-validator type="requiredString">
<message>用户名不能为空</message>
</feild-validator>
</feild>
<feild name="password">
<feild-validator type="requiredString">
<message>密码不能为空</message>
</feild-validator>
</feild>
<feild name="gender">
<feild-validator type="requiredString">
<message>性别不能为空</message>
</feild-validator>
</feild>
<feild name="email">
<feild-validator type="email">
<message>油箱格式不正确</message>
</feild-validator>
</feild>
</validators>
！！
- jsp文件改动，因DomainModel下的注入方式，对参数设定的字段名称需要加对象实例的前缀（user.name)：
<s:form action = "regist" method = "post">
<s:textfield name="user.name" label="用户名"/>
<s:password name="user.password" label="密码"/>
<s:texfield name="user.gender" label="性别"/>
<s:texfield name="user.email" label="油箱"/>
<s:texfield name="user.address" label="地址"/>
<s:submit/>
</s:form>
三、ModelDriven注入下的数据校验，与域模型相比，主要是Action及jsp注入参数发生变化，同时需要对visitor校验器参数进行调整：
- web.xml配置文件无变化；
- bean文件无变化；
- RegServiceDao文件无变化；
- Action文件，需做以下修改：
- 声明ModelDriven接口（泛型接口）；
- 需要声明getModel方法，同时对User类进行实例化；
- 无需添加bean对象的getter和setter方法；
package com.action
public class RegAction extends ActionSupport implements ModelDriven<User>{
//无需实例化User
private User user;
public User getModel(){
if(user!=null){
return user;
}else{
user = new User();
return user;
}
}
public String regist(){
RegistServiceDao rsd = new RegistServiceDao();
if(rsd.regist(user)){
return "success";
}else{
return "input";
}
}
}
- struts文件配置Action无变化；
********
- validation.xml文件配置校验器，同第二种，使用visitor校验器，需要修改如下两个参数：
- field标签的name属性为：model；
- field下param标签的name为"appendPrefix" 属性的值修改为false（字段不再需要添加bean对象前缀）；
- User-abc-validation.xml配置校验器无变化；
！！
- jsp页面需做简单修改，接收参数不需添加bean对象前缀
<s:form action = "regist" method = "post">
<s:textfield name="name" label="用户名"/>
<s:password name="password" label="密码"/>
<s:texfield name="gender" label="性别"/>
<s:texfield name="email" label="油箱"/>
<s:texfield name="address" label="地址"/>
<s:submit/>
</s:form>