struts 验证框架使用 -优快云博客

1. 在struts-config.xml文件中添加验证框架的插件

<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
<set-property property="pathnames" value="/WEB-INF/validator-rules.xml,/WEB-INF/validation.xml"/>
</plug-in>

2. 配置ApplicationResource.properties（eclipse默认struts的根目录）

将validator-rules.xml中
   errors.required={0} is required.
   errors.minlength={0} can not be less than {1} characters.
   errors.maxlength={0} can not be greater than {1} characters.
   errors.invalid={0} is invalid.
   errors.byte={0} must be a byte.
   errors.short={0} must be a short.
   errors.integer={0} must be an integer.
   errors.long={0} must be a long.
   errors.float={0} must be a float.
   errors.double={0} must be a double.
   errors.date={0} is not a date.
   errors.range={0} is not in the range {1} through {2}.
   errors.creditcard={0} is an invalid credit card number.
   errors.email={0} is an invalid e-mail address.
的信息copy到ApplicationResource.properties资源文件中

3. 创建Form

继承于ValidatorForm，不用reset 和 validate方法

public class UserForm extends ValidatorForm {

    private String uname;
    private String upass;
    public String getUname() {
        return uname;

    }

    public void setUname(String uname) {
        this.uname = uname;
    }
    public String getUpass() {
        return upass;
    }
    public void setUpass(String upass) {
        this.upass = upass;
    }
}

4. 设置struts-config.xml文件中的validate=false

5. 新建validation.xml文件，在validation.xml中配置验证信息

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE form-validation PUBLIC "-//Apache Software Foundation//DTD Commons Validator Rules Configuration 1.0.1//EN" "validator_1_0_1.dtd" >
<form-validation>
    <formset>
        <!-- name:属性对应struts-config.xml中FormBean的名字 -->
        <form name="userForm">
        <!-- field:要验证的字段，即属性，depends:依赖的验证规则 -->
            <field property="uname" depends="required">
                <!-- arg0:在资源文件中配置错误消息的{0}参数值-->
                <!-- errors.uname是资源文件中的key -->
                <arg0 key="errors.uname"/>
            </field>
        </form>
    </formset>
</form-validation>

6. 实现客户端的 javascript 验证

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<%@taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html" %>

<html>
  <head>
    <title>My JSP 'index.jsp' starting page</title>
  </head>
  <body>
    <html:form action="login" οnsubmit="return validateUserForm(this);">
        用户名：<html:text property="uname"></html:text><br>
        密  码：<html:text property="upass"></html:text><br>
        <html:submit value="登录"></html:submit>
    </html:form>
    <html:javascript formName="userForm"/>
  </body>
</html>

经测试OK