Struts2 校验

struts2的输入校验

类型转换与输入校验的流程:

1.首先struts2对客户端传来的数据进行类型转换

2.类型转换完毕后再进行输入校验

3. 如果类型转换和输入校验都没有错误发生,再会进入execute方法

一 .对于类型转换发生了错误 ,struts2会自动产生一些错误的提示

要修改这些默认的提示有两种方法


1.全局的方法:

首先在struts.xml里加入:<constant name="struts.custom.i18n.resources" value="message"></constant>

message可以随便定, 然后在src目录下,建立一个与value值对应的:message.properties文件

文件的内容是:xwork.default.invalid.fieldvalue={0} error 前面的部分是固定的

2.局部的方法:

   在与要验证的action同一个包下,并且名字也相同,只是多了properties 如:xxxaction.properites

   invalid.fieldvalue.age=错误的信息 invalid.fieldvalue都相同

对于struts2,有Filed与action区别的错误 *



对于

设theme="simple" 可以不用struts2标签默认带来的东西

对于struts2的,一个action处理多个业务

就是在struts.xml文件的<action>标签中,设置一个method="abc "

而对应的action文件中:

// public String abc() throws Exception
// {
//   System.out.println("abc method invoked");
// 
//   return SUCCESS;
// }
//

对应的验证方法
// public void validateAbc()
// {
//   System.out.println("validateAbc() invoked");
// }
//

使用验证框架进行验证:

1.对那个action里的字段进行校验,就得与action同一个包下,建一个xxx--validation.xml

如果要验证对应actionj里,执行的方法的验证:名称取为:xxx(aciton名)-yyy(方法名)--validation.xml

示例的代码如下:

<?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>

<!-- 
<validator type="requiredstring">
   <param name="fieldName">username</param>
   <message>username should not be blank!</message>
</validator>

<validator type="stringlength">
   <param name="fieldName">username</param>
   <param name="minLength">6</param>
   <param name="maxLength">10</param>
   <message>username should be between ${minLength} and ${maxLength}</message>
</validator>
-->

<field name="username">
   <field-validator type="requiredstring">
    <param name="trim">true</param>
    <message key="username.xml.invalid"></message>
   </field-validator>
  
   <field-validator type="stringlength">
    <param name="minLength">6</param>
    <param name="maxLength">10</param>
    <message>username should be between ${minLength} and ${maxLength}</message>
   </field-validator>
</field>

<field name="password">
   <field-validator type="requiredstring">
    <message>password should not be blank!</message>
   </field-validator>
  
   <field-validator type="stringlength">
    <param name="minLength">6</param>
    <param name="maxLength">10</param>
    <message>password should be between ${minLength} and ${maxLength}</message>
   </field-validator>
</field>

<field name="repassword">
   <field-validator type="requiredstring">
    <message>repassword should not be blank!</message>
   </field-validator>
  
   <field-validator type="stringlength">
    <param name="minLength">6</param>
    <param name="maxLength">10</param>
    <message>repassword should be between ${minLength} and ${maxLength}</message>
   </field-validator>
</field>

<field name="age">
   <field-validator type="required">
    <message>age should not be blank!</message>
   </field-validator>

   <field-validator type="int">
    <param name="min">1</param>
    <param name="max">150</param>
    <message>age should be between ${min} and ${max}</message>
   </field-validator>
</field>

<field name="birthday">
   <field-validator type="required">
    <message>birthday should not be blank!</message>
   </field-validator>
  
   <field-validator type="date">
    <param name="min">2001-01-01</param>
    <param name="max">2003-12-31</param>
    <message>birthday should be between ${min} and ${max}</message>
   </field-validator>
</field>

<field name="graduation">
   <field-validator type="required">
    <message>graduation should not be blank!</message>
   </field-validator>
  
   <field-validator type="date">
    <param name="min">2005-01-01</param>
    <param name="max">2007-12-31</param>
    <message>graduation should be between ${min} and ${max}</message>
   </field-validator>
</field>
</validators>