首先搭建好struts1的开发环境,然后在struts1的配置文件struts-config中加入
<plug-in className="org.apache.struts.validator.ValidatorPlugIn"> <set-property property="pathnames" value="/org/apache/struts/validator/validator-rules.xml, /WEB-INF/validation.xml"/> </plug-in>
这样就把Validator插件引入到struts1中了,然后新建一个UserFormBean继承ValidateActionForm类
package cn.lfd.web.formbean; import org.apache.struts.chain.commands.servlet.ValidateActionForm; public class UserFormBean extends ValidateActionForm { private String username; private String password; private String email; private String birthday; public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } public String getBirthday() { return birthday; } public void setBirthday(String birthday) { this.birthday = birthday; } }
然后在WEB-INF目录下新建一个validation.xml文件
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE form-validation PUBLIC "-//Apache Software Foundation//DTD Commons Validator Rules Configuration 1.3.0//EN" "http://jakarta.apache.org/commons/dtds/validator_1_3_0.dtd"> <form-validation> <formset> <form name="UserFormBean"> <field property="username" depends="required,minlength,maxlength"> <arg key="用户名" position="0" resource="false"/> <arg name="minlength" key="${var:minlength}" position="1" resource="false"/> <arg name="maxlength" key="${var:maxlength}" position="1" resource="false"/> <var> <var-name>minlength</var-name> <var-value>3</var-value> </var> <var> <var-name>maxlength</var-name> <var-value>8</var-value> </var> </field> <field property="email" depends="email"> <arg key="邮箱" position="0" resource="false"/> </field> </form> </formset> </form-validation>
校验器从validator-rules.xml文件中可以获取,最后新建一个MessageResource.properties的资源文件,在struts-config文件中配置一下,struts1就会根据这个文件进行错误显示
<message-resources parameter="MessageResource"></message-resources>
MessageResource.properties文件:
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.