Stripes视图框架Java对象属性验证，它允许对字段设置是否必须填写，对数字大小进行限制等。我用prototype.js Ajax 将验证后的数据及时地展示出来，下面来看程序。
1、编写User实体类
此用户共三个属性： name、email、age.
package com.boonya.stripes.entity;
public class User {
private String name;
private String email;
private int age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
2、编写UserActionBean视图控制Action类
此类中包含了用户输入界面(userRegister.jsp)和用户数据提交完成后的数据展示界面(userInfo.jsp)，我们要验证的是用户的数据合法的时候才展示用户数据。
package com.boonya.stripes.actions;
import com.boonya.stripes.entity.User;
import net.sourceforge.stripes.action.DefaultHandler;
import net.sourceforge.stripes.action.ForwardResolution;
import net.sourceforge.stripes.action.Resolution;
import net.sourceforge.stripes.action.SessionScope;
import net.sourceforge.stripes.validation.Validate;
import net.sourceforge.stripes.validation.ValidateNestedProperties;
@SessionScope
public class UserActionBean extends AbstractActionBean {
private static final long serialVersionUID = 1L;
protected static final String REGISTER="/WEB-INF/userRegister.jsp";
protected static final String USER_INFO="/WEB-INF/userInfo.jsp";
@ValidateNestedProperties({
@Validate(field ="name",required=true,on = {"viewUserInfo"}),
@Validate(field ="email",required=true,on = {"viewUserInfo"}),
@Validate(field ="age", required = true, minvalue = 13, on = {"viewUserInfo"})
})
private User user;
@DefaultHandler
public Resolution register() {
return new ForwardResolution(REGISTER);
}
public Resolution viewUserInfo(){
return new ForwardResolution(USER_INFO);
}
public void setUser(User user) {
this.user = user;
}
public User getUser() {
return user;
}
}
注：@ValidateNestedProperties 验证对象包含的特殊属性字段值的限制；@Validate 具体验证的字段。filed表示字段、required表示是否必需、on表示绑定到的事件方法。
3、编写界面操作的Jsp文件
userRegister.jsp
pageEncoding="UTF-8"%>
html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
User-Registerfunction userHandleAjax() {
var myAjax = new Ajax.Updater(‘user‘,
‘‘,
{
method: ‘get‘,
parameters:Form.serialize(‘userForm‘)
});
}
Update user info:
Name:
Email:
Age:
userInfo.jsp
pageEncoding="UTF-8"%>
uri="http://stripes.sourceforge.net/stripes.tld"%>
html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
User-InfoUser‘s info
Hello ${actionBean.user.name}
Email: ${actionBean.user.email}
age: ${actionBean.user.age}
注：表单字段赋值：对象.属性 即user.name等等；而取值以$(actionBean.对象.属性)，即${actionBean.user.name}等等;
4、测试表单提交数据异常处理
故意少输入参数，页面显示请求不正常页面：
产生的异常代码提示：
Caused by: java.util.MissingResourceException: Could not find an error message with any of the following keys:‘com.boonya.stripes.actions.UserActionBean.user.age.valueNotPresent‘,‘com.boonya.stripes.actions.UserActionBean.user.age.errorMessage‘,‘/actions/User.action.user.age.valueNotPresent‘,‘/actions/User.action.user.age.errorMessage‘,‘user.age.valueNotPresent‘,‘user.age.errorMessage‘,‘com.boonya.stripes.actions.UserActionBean.valueNotPresent‘.com.boonya.stripes.actions.UserActionBean.errorMessage‘, ‘/actions/User.action.valueNotPresent‘, ‘/actions/User.action.errorMessage‘, ‘validation.required.valueNotPresent‘.
at net.sourceforge.stripes.validation.ScopedLocalizableError.getMessageTemplate(ScopedLocalizableError.java:164)
at net.sourceforge.stripes.action.SimpleMessage.getMessage(SimpleMessage.java:91)
at net.sourceforge.stripes.validation.SimpleError.getMessage(SimpleError.java:102)
at net.sourceforge.stripes.tag.ErrorsTag.doEndTag(ErrorsTag.java:349)
at org.apache.jsp.WEB_002dINF.userRegister_jsp._jspService(userRegister_jsp.java:109)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
... 46more
当Stripes验证失败时，不知道怎样返回这些错误信息，解决方案也很简单：从 Stripes 包中复制一份 StripesResources.properties 到项目的源代码跟目录下(与WEB/classess同级)即可。加入StripesResources.properties文件后输入：name=boonya,[email protected],age=12.;测试效果如下图所示：
此时，年龄验证错误；但是Stripes的错误消息已经知道该怎么提示错误信息给用户了。
5、测试正确的验证和Ajax效果
在表单输入框中输入符合验证条件的数据如：name=boonya,[email protected],age=23.;效果如下图所示：
至此，整个示例程序测试完毕。
原文：http://sunl2014.blog.51cto.com/8889033/1532416
