Validator验证

1.jsp文件中form表单：

 

<html:form action="/test">
 <html:text  property="username" />
 <html:text property="password" />
 <html:submit property="submit" value="submit"></html:submit>
</html:form>

 

2.struts-config.xml文件中action

     <action
            path="/test"
            type="jp.co.TestAction"
            name="logonForm"
            scope="request"
             input="/pages/Welcome.jsp"
            validate="true">
         <forward name="sucess" path="/pages/Test.jsp" />
     </action>

注意，validate="true"。

3.LogonForm
form要继承ValidateActionForm

import org.apache.struts.chain.commands.servlet.ValidateActionForm;

public class LogonForm extends ValidateActionForm{

 private String username = "";
 
 private String password ="";

 /**
  * @return the username
  */
 public String getUsername() {
  return username;
 }

 /**
  * @param username the username to set
  */
 public void setUsername(String username) {
  this.username = username;
 }

 /**
  * @return the password
  */
 public String getPassword() {
  return password;
 }

 /**
  * @param password the password to set
  */
 public void setPassword(String password) {
  this.password = password;
 }
}

4.Validator.xml文件
    <formset>

        <!-- name指定所用的form名  -->
        <form name="logonForm">
            <field
              <!-- 要check的项目  -->
                property="username"
                <!-- 要进行的check 必须输入和最小位数check -->
                depends="required,minlength">
               <!-- 出错时表示信息的替换内容（logonForm.username=username，“username”将替换信息中的{0}） -->
                    <arg key="logonForm.username"/>
      <!-- minlengthcheck出错时表示信息的替换内容（logonForm.username=username，“username”将替换信息中的{0}“5”将替换信息中的{1}） -->
                    <arg name="minlength" key="5" resource="fase"/>
     <!-- 向验证规则传递参数 -->
                    <var>
   <!-- minlength验证规则 输入内容的位数不能小于5位 -->
                        <var-name>minlength</var-name>
                        <var-value>5</var-value>
                    </var>
            </field>
            <field
                property="password"
                depends="required,mask,maxlength">
    <!-- maxlength验证出错时表示的信息为test.maxlength（{0} aaaaaaaaaaaaa {1} bbbbbbbbbbbbbb.） -->
                 <msg name="maxlength" key="test.maxlength" />
                    <arg key="logonForm.password"/>
                    <arg name="maxlength" key="5" resource="false" />
                    <var>
   <!-- mask验证规则 输入内容必须是数字或字母 -->
                        <var-name>mask</var-name>
                        <var-value>^[0-9a-zA-Z]*$</var-value>
                    </var>
                    <var>
   <!-- maxlength验证规则 输入内容的位数不能大于5位 -->
                        <var-name>maxlength</var-name>
                        <var-value>5</var-value>
                    </var>
            </field>
        </form>

    </formset>

 

5.MessageResources.properties

 

logonForm.username=username
logonForm.password=password bbb
test.maxlength={0} aaaaaaaaaaaaa {1} bbbbbbbbbbbbbb.