Struts2的输入校验(一)

新建立一个Action

 

package com.struts2.action;import java.util.Date;import com.opensymphony.xwork2.ActionSupport;public class UserAction extends ActionSupport {private String username;private String password; private int age; private Date brith;public int getAge() {return age;}public void setAge(int age) {this.age = age;}public Date getBrith() {return brith;}public void setBrith(Date brith) {this.brith = brith;}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 execute() throws Exception { return SUCCESS;}}

 

在同一包下建立 UserAction-validation.xml文件

UserAction为action的类名 -validation.xml为固定的

<!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0.2//EN" "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd"><!-- 校验文件的根元素 --><validators><!-- 校验Action的name属性 --><field name="username"><!-- 指定name属性必须满足必填规则 --><field-validator type="requiredstring"><param name="trim">true</param><message>必须输入名字</message></field-validator><!-- 指定name属性必须匹配正则表达式 --><field-validator type="regex"><param name="expression"><!--[CDATA[(/w{4,25})]]></param><message>您输入的用户名只能是字母和数字，且长度必须在4到25之间</message></field-validator></field><!-- 校验Action的pass属性 --><field name="password"><!-- 指定pass属性必须满足必填规则 --><field-validator type="requiredstring"><param name="trim">true</param><message>必须输入密码</message></field-validator><!-- 指定pass属性必须满足匹配指定的正则表达式 --><field-validator type="regex"><param name="expression"><![CDATA[(/w{4,25})]]--></param><message>您输入的密码只能是字母和数字，且长度必须在4到25之间</message></field-validator></field><!-- 指定age属性必须在指定范围内--><field name="age"><field-validator type="int"><param name="min">1</param><param name="max">150</param><message>年龄必须在1到150之间</message></field-validator></field><!-- 指定birth属性必须在指定范围内--><field name="birth"><field-validator type="date"><!-- 下面指定日期字符串时，必须使用本Locale的日期格式 --><param name="min">1900-01-01</param><param name="max">2050-02-21</param><message>生日必须在${min}到${max}之间</message></field-validator></field></validators>

页面输出错误信息 <s:fielderror />

在页面上加入<s:head/>标签可以使错误信息改为红色字体

jsp页面

<s:head/> <s:form action="user/user.action"> <s:textfield label="用户名" name="username" ></s:textfield> <s:password label="密码" name="password" ></s:password> <s:textfield label="年龄" name="age"></s:textfield> <s:textfield label="生日" name="brith"></s:textfield> <s:submit value="登录" align="left"></s:submit> </s:form>

struts.xml文件

<struts><constant name="struts.devMode" value="true" /><constant name="struts.i18n.encoding" value="UTF-8" /><package name="user" extends="struts-default" namespace="/user"><action name="user" class="com.struts2.action.UserAction"><result name="success">/success.jsp</result><result name="input">/Login.jsp</result></action></package></struts>