校验器-对提交的用户名和密码进行过滤

学渣要做笔记，学渣要做笔记~~~~

校验器分三部分，在一个做好了的登录界面上进行添加

1.在.jsp中添加，其中的S标签就是添加的，重要的是不要忘了<%@taglib  prefix="s" uri="/struts-tags"%>

<tr>
                        <td>&nbsp;</td>
                        <td width="11%" height="40" >用户名：&nbsp;&nbsp;</td>
                        <td height="40" colspan="2">
                        <input type="text" size="20" border="1" name="infor.name">
                        <s:property value="fieldErrors['infor.name'][0]" />
                        </td>
                    </tr>
                    <tr>
                        <td>&nbsp;</td>
                        <td width="11%" height="28">密码<img src="<%=request.getContextPath()%>/images/luck.gif" width="19" height="18">：&nbsp;&nbsp;
                        </td>
                        <td height="28" colspan="2"><input type="text" size="20" border="1" name="infor.password">
                        <s:property value="fieldErrors['infor.password'][0]" />
                        </td>
                    </tr>

2.在X-x-validation.xml中写校验信息

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC
          "-//OpenSymphony Group//XWork Validator 1.0.3//EN"
          "http://www.opensymphony.com/xwork/xwork-validator-1.0.3.dtd">//是什么版本就写什么版本
<validators>
     <field name="infor.name">   
          <field-validator type="requiredstring">
               <message>用户名不能为空</message>
         </field-validator>
         <field-validator type="stringlength">
              <param name="minLength">2</param>               
              <param name="maxLength">12</param>
              <message>
                       账号长度必须在${minLength}~${maxLength}之间
              </message>
         </field-validator>
        </field>
        
         <field name="infor.password">   
             <field-validator type="requiredstring">
                    <message>密码不能为空</message>
             </field-validator>
         <field-validator type="stringlength">
              <param name="minLength">3</param>               
              <param name="maxLength">12</param>
              <message>
                      密码长度必须在${minLength}~${maxLength}之间
              </message>
         </field-validator>
      </field>
</validators>

3~.Java文件中是用的默认execute（）{}方法，那就直接在Struts.xml中加入input跳转的界面

    <action name="landing" class="com.chinasofti.strutshuman.struts.Landing">
        <result name="havelervel1" type="dispatcher">/massage.jsp</result>
        <result name="havelervel2" type="dispatcher">/massage.jsp</result>
        <result name="havelervel3" type="dispatcher">/massage.jsp</result>
        <result name="havepassword" type="dispatcher">/massage.jsp</result>
        <result name="input" type="dispatcher">/landing.jsp</result>
    </action>