Struts2驗證比起Struts1驗證框架來,好用多了,使程序更加清晰易讀,充分利用了配置文件的作用,也算是解耦的表現吧.
核心代碼如下:
1.用戶注冊頁面register.jsp
2.注冊成功歡迎頁面welcome.jsp
congratulations!${user.userName}
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3.注冊處理action RegisterAction
package org.kingtoon.action;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.ServletActionContext;
import org.kingtoon.bean.User;
import com.opensymphony.xwork2.ActionSupport;
public class RegisterAction extends ActionSupport {
private User user;
@Override
public String execute() throws Exception {
if(!(user.getPassword().equals(user.getRePassword()))){
this.addFieldError("password", "請輸入相同的密碼");
return "input";
}
else
{
HttpServletRequest request = ServletActionContext.getRequest ();
request.setAttribute("user", user);
return SUCCESS;
}
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
}
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4. 用戶Bean User.java
package org.kingtoon.bean;
import java.util.Date;
public class User {
private String userName;
private String password;
private String rePassword;
private Integer age;
private Date birthday;
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getRePassword() {
return rePassword;
}
public void setRePassword(String rePassword) {
this.rePassword = rePassword;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
} |
5.配置驗證文件RegisterAction-validation.xml
< VALIDATORS>
< !-- 驗證字符串不能為空 -->
< FIELD-VALIDATOR type="requiredstring">
< !-- 去空格 -->
< PARAM name="trim">true
< !-- 錯誤提示信息 -->
< MESSAGE>用戶名不能為空
< /FIELD-VALIDATOR>
< !-- 驗證字符串長度 -->
< FIELD-VALIDATOR type="stringlength">
< PARAM name="minLength">2< /PARAM>
20
< MESSAGE>用戶名長度應在2到18個字符間
< FIELD-VALIDATOR type="requiredstring">
true
< MESSAGE>密碼不能為空
< /FIELD-VALIDATOR>
< FIELD-VALIDATOR type="stringlength">
< PARAM name="minLength">6< /PARAM>
18
密碼長度應在6到18個字符之間< /MESSAGE>
< /FIELD-VALIDATOR>
< /FIELD>
< FIELD-VALIDATOR type="int">
< PARAM name="min">1
< PARAM name="max">150
< MESSAGE>年齡應在1到150之間
< /FIELD-VALIDATOR>
< !-- 驗證字符串為日期類型 -->
< FIELD-VALIDATOR type="date">
< PARAM name="min">1900-01-01
< PARAM name="max">2008-10-16< /PARAM>
< MESSAGE>出生日期應在1900-01-01到2008-10-16< /MESSAGE>
< /FIELD>
< /VALIDATORS>
6.struts2框架默認加載的配置文件struts.xml
< STRUTS>
< CONSTANT name="struts.custom.i18n.resources" value="messageResource">< /CONSTANT>
< RESULT name="success">/welcome.jsp< /RESULT>
< RESULT name="input">/register.jsp< /RESULT>
< /ACTION>
< /PACKAGE>
< /STRUTS>
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7.web服務器啟動時加載Struts 配置文件 web.xml
< ?XML:NAMESPACE PREFIX = [default] < web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
< filter>
< filter-name>struts-cleanup
org.apache.struts2.dispatcher.ActionContextCleanUp
< filter>
< filter-name>struts2
org.apache.struts2.dispatcher.FilterDispatcher
< filter-mapping>
< filter-name>struts-cleanup< /filter-name>
/*
< filter-mapping>
< filter-name>struts2< /filter-name>
< url-pattern>/*< /url-pattern>
< welcome-file-list>
< welcome-file>register.jsp< /welcome-file>
< /welcome-file-list>
< /web-app> |
至此,完畢.不過需要注意:
1.配置Struts2驗證xml文檔的名字有講究:格式為:Action名字-validation.xml;
2.驗證文檔里的中的type類型要和VO中的User屬性類型一致,否則會報類型轉換錯誤
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