验证器：
验证器:用户输入验证
1.手动编程方式 1)对于动作类中所有方法进行验证 a.动作类继承ActionSuport b.覆盖调用public void validate(){} 方法 c.在validate方法中，编写不符合要求的代码判断，并调用父类的addFieldError(String fieldName,String errorMessage) 如果fieldError（存放错误信息的Map）有任何的元素，就是验证不通过，动作方法不会执行。 Struts2框架会返回到name=input的result d.在name=input指定的页面上使用struts2的标签显示错误信息。<s:fielderror /> 2)对于动作类中指定方法进行验证 编写步骤与手动编程方式相同，验证方法书写要求如下： public void validate[Add]() { } //检测add()方法
1 package cn.gs.ly; 2 3 import com.opensymphony.xwork2.ActionSupport; 4 5 public class UserAction extends ActionSupport { 6 private String username; //不能为空 7 private String password; //不能为空 ，切三到六位数字 8 9 public String getUsername() { 10 return username; 11 } 12 public void setUsername(String username) { 13 this.username = username; 14 } 15 public String getPassword() { 16 return password; 17 } 18 public void setPassword(String password) { 19 this.password = password; 20 } 21 22 23 24 public String add(){ 25 System.out.println("add方法执行成功"); 26 return SUCCESS; 27 } 28 29 30 public String update(){ 31 System.out.println("update方法执行成功"); 32 return SUCCESS; 33 } 34 35 @Override 36 //对于动作类中所有方法进行验证 37 public void validate() { //只验证不符合条件的数据 38 if(username==null||"".equals(username.trim())){ 39 addFieldError("username", "姓名不能为空"); 40 } 41 if(password==null||!password.matches("\\d{3,6}")){ 42 addFieldError("password", "密码不能为空，切为3-6位纯数字"); 43 } 44 } 45 46 // //对于动作类中指定方法进行验证 47 // public void validateAdd() { //只验证不符合条件的数据 48 // if(username==null||"".equals(username.trim())){ 49 // addFieldError("username", "姓名不能为空"); 50 // } 51 // if(password==null||!password.matches("\\d{3,6}")){ 52 // addFieldError("password", "密码不能为空，切为3-6位纯数字"); 53 // } 54 // } 55 56 }
2、基于XML配置文件的方式：
1、对于动作类中所有方法进行验证: UserAction-validation.xml 在动作类中的包中建立一个名称为：动作类简单名-validation.xml 2、对于动作类中指定方法进行验证: UserAction-user_add-validation.xml 动作类简单名-action名-validation.xml
1 默认验证器: 2 <validators> 3 <validator name="required" class="com.opensymphony.xwork2.validator.validators.RequiredFieldValidator"/> 4 <validator name="requiredstring" class="com.opensymphony.xwork2.validator.validators.RequiredStringValidator"/> 5 <validator name="int" class="com.opensymphony.xwork2.validator.validators.IntRangeFieldValidator"/> 6 <validator name="long" class="com.opensymphony.xwork2.validator.validators.LongRangeFieldValidator"/> 7 <validator name="short" class="com.opensymphony.xwork2.validator.validators.ShortRangeFieldValidator"/> 8 <validator name="double" class="com.opensymphony.xwork2.validator.validators.DoubleRangeFieldValidator"/> 9 <validator name="date" class="com.opensymphony.xwork2.validator.validators.DateRangeFieldValidator"/> 10 <validator name="expression" class="com.opensymphony.xwork2.validator.validators.ExpressionValidator"/> 11 <validator name="fieldexpression" class="com.opensymphony.xwork2.validator.validators.FieldExpressionValidator"/> 12 <validator name="email" class="com.opensymphony.xwork2.validator.validators.EmailValidator"/> 13 <validator name="url" class="com.opensymphony.xwork2.validator.validators.URLValidator"/> 14 <validator name="visitor" class="com.opensymphony.xwork2.validator.validators.VisitorFieldValidator"/> 15 <validator name="conversion" class="com.opensymphony.xwork2.validator.validators.ConversionErrorFieldValidator"/> 16 <validator name="stringlength" class="com.opensymphony.xwork2.validator.validators.StringLengthFieldValidator"/> 17 <validator name="regex" class="com.opensymphony.xwork2.validator.validators.RegexFieldValidator"/> 18 <validator name="conditionalvisitor" class="com.opensymphony.xwork2.validator.validators.ConditionalVisitorFieldValidator"/> 19 </validators>
具体配置方法示例：
对于动作类中所有方法进行验证: UserAction-validation.xml
对于动作类中指定方法进行验证: UserAction-user_add-validation.xml
1 <?xml version="1.0" encoding="UTF-8"?> 2 <!DOCTYPE struts PUBLIC 3 "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" 4 "http://struts.apache.org/dtds/struts-2.3.dtd"> 5 <struts> 6 <constant name="struts.devMode" value="true"></constant> 7 <constant name="struts.i18n.encoding" value="UTF-8"></constant> 8 <constant name="struts.custom.i18n.resources" value="GS"></constant> 9 10 <package name="mypackage" extends="struts-default"> 11 <global-results><!-- 全局错误页 --> 12 <result name="error" type="dispatcher">/customer/error.jsp</result> 13 </global-results> 14 </package> 15 16 <package name="validate" namespace="/validate" extends="struts-default"> 17 <action name="user_*" class="cn.gs.ly.UserAction" method="{1}"> 18 <result type="dispatcher" name="success">/success.jsp</result> 19 <result type="dispatcher" name="error">/error.jsp</result> 20 <result type="dispatcher" name="input">/{1}User.jsp</result> <!-- 转换数据类型失败，输入验证错误 --> 21 </action> 22 </package> 23 </struts>
3、自定义验证器
1.编写一个类，继承FieldValidatorSupport类 2.重写 public void validate(Object object) throws ValidationException {} 方法，编写逻辑 3.注册验证器 在WEB-INF/classes目录下(src)建立一个validators.xml 配置文件。
<validators>
<validator name="strongpassword" class="cn.gs.ly.validators.StrongPasswordValidator"/>
</validators>
实例
1 package cn.gs.ly.validators; 2 3 import com.opensymphony.xwork2.validator.ValidationException; 4 import com.opensymphony.xwork2.validator.validators.FieldValidatorSupport; 5 6 public class StrongPasswordValidator extends FieldValidatorSupport { 7 8 public void validate(Object object) throws ValidationException { 9 String fieldName = getFieldName();//取得字段名 10 String filedValue = (String)getFieldValue(fieldName, object);//取得用户输入的当前字段的值 11 if(!isPasswordStrong(filedValue)){ 12 addFieldError(fieldName, object); 13 } 14 } 15 private static final String GROUP1 = "abcdefghijklmnopqrstuvwxyz"; 16 private static final String GROUP2 = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; 17 private static final String GROUP3 = "0123456789"; 18 protected boolean isPasswordStrong(String password) { 19 boolean ok1 = false; 20 boolean ok2 = false; 21 boolean ok3 = false; 22 int length = password.length(); 23 for(int i=0;i<length;i++){ 24 if(ok1&&ok2&&ok3) 25 break; 26 String character = password.substring(i,i+1); 27 if(GROUP1.contains(character)){ 28 ok1 = true; 29 continue; 30 } 31 if(GROUP2.contains(character)){ 32 ok2 = true; 33 continue; 34 } 35 if(GROUP3.contains(character)){ 36 ok3 = true; 37 continue; 38 } 39 } 40 return ok1&&ok2&&ok3; 41 } 42 }
4、Struts2对于i18n的支持
命名规则：
basename.properties
basename_language_country.properties
basename_language.properties
1.全局范围
在WEB-INF/classes目录下
2.包范围
服务于Java类中的包下的动作类的。
取名：package_语言_国家.properties
package_**_.properties
3.action范围
放到与动作类相同的包中
取名：动作类名_语言_国家.properties
actionclass_**_.properties
文件内容 1 GS_zh_CN.properties： 2 welcome={0} \u6B22\u8FCE\u6765\u5230\u8FD9\u91CC."i18n test" {1} 3 4 GS_en_US.properties： 5 welcome={0} welcome to here."i18n test" {1}
4.1、jsp中读取国际化的消息：
1 <%@ page language="java" contentType="text/html" pageEncoding="utf-8"%> 2 <%@ taglib prefix="s" uri="/struts-tags" %> 3 <!DOCTYPE html> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 7 <title>Insert title here</title> 8 </head> 9 <body> 10 <s:text name="welcome"> 11 <s:param >刘超</s:param> <!-- 给welcome添加赋值于占位符处（{*}） --> 12 <s:param >go home</s:param> 13 </s:text> 14 15 <s:i18n name="cn/gs/ly/package"> <!-- 包范围 --> 16 <s:text name="welcome"> 17 <s:param >刘超</s:param> 18 <s:param >go home</s:param> 19 </s:text> 20 </s:i18n> 21 </body> 22 </html>
4.2、动作类中读取国际化的消息
1 package cn.gs.ly; 2 3 import com.opensymphony.xwork2.ActionContext; 4 import com.opensymphony.xwork2.ActionSupport; 5 6 public class I18nAction extends ActionSupport { 7 8 @Override 9 public String execute() throws Exception { 10 //String value = getText("welcome"); //获取welcome 对应的值 11 12 //获取welcome 对应的值 ，并添加赋值于占位符（{*}）处 13 String value = getText("welcome",new String[]{"LY","good brother"}); 14 15 ActionContext.getContext().put("message", value); 16 return SUCCESS; 17 } 18 }
