struts2 基础4 验证器、国际化

验证器：

验证器:用户输入验证

 1.手动编程方式

)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 />

        )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

UserAction.java

 1 package cn.gs.ly;

 import com.opensymphony.xwork2.ActionSupport;

 public class UserAction extends ActionSupport {

     private String username;  //不能为空

     private String password;  //不能为空 ，切三到六位数字

     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 add(){

         System.out.println("add方法执行成功");

         return SUCCESS;

     }    

     public String update(){

         System.out.println("update方法执行成功");

         return SUCCESS;

     }

     @Override

     //对于动作类中所有方法进行验证

     public void validate() { //只验证不符合条件的数据

         if(username==null||"".equals(username.trim())){

             addFieldError("username", "姓名不能为空");

         }

         if(password==null||!password.matches("\\d{3,6}")){

             addFieldError("password", "密码不能为空，切为3-6位纯数字");

         }

     }

 //    //对于动作类中指定方法进行验证   对add（）方法进行验证

 //    public void validateAdd() { //只验证不符合条件的数据

 //        if(username==null||"".equals(username.trim())){

 //            addFieldError("username", "姓名不能为空");

 //        }

 //        if(password==null||!password.matches("\\d{3,6}")){

 //            addFieldError("password", "密码不能为空，切为3-6位纯数字");

 //        }

 //    }

 }

struts.xml

<package name="validate" namespace="/validate" extends="struts-default">
　　<action name="user_*" class="cn.gs.ly.UserAction" method="{1}">
　　　　<result type="dispatcher" name="success">/success.jsp</result>
　　　　<result type="dispatcher" name="error">/error.jsp</result>
　　　　<result type="dispatcher" name="input">/{1}User.jsp</result> 
　　</action>
</package>

　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

 默认验证器:

     <validators>

         <validator name="required" class="com.opensymphony.xwork2.validator.validators.RequiredFieldValidator"/>

         <validator name="requiredstring" class="com.opensymphony.xwork2.validator.validators.RequiredStringValidator"/>

         <validator name="int" class="com.opensymphony.xwork2.validator.validators.IntRangeFieldValidator"/>

         <validator name="long" class="com.opensymphony.xwork2.validator.validators.LongRangeFieldValidator"/>

         <validator name="short" class="com.opensymphony.xwork2.validator.validators.ShortRangeFieldValidator"/>

         <validator name="double" class="com.opensymphony.xwork2.validator.validators.DoubleRangeFieldValidator"/>

         <validator name="date" class="com.opensymphony.xwork2.validator.validators.DateRangeFieldValidator"/>

         <validator name="expression" class="com.opensymphony.xwork2.validator.validators.ExpressionValidator"/>

         <validator name="fieldexpression" class="com.opensymphony.xwork2.validator.validators.FieldExpressionValidator"/>

         <validator name="email" class="com.opensymphony.xwork2.validator.validators.EmailValidator"/>

         <validator name="url" class="com.opensymphony.xwork2.validator.validators.URLValidator"/>

         <validator name="visitor" class="com.opensymphony.xwork2.validator.validators.VisitorFieldValidator"/>

         <validator name="conversion" class="com.opensymphony.xwork2.validator.validators.ConversionErrorFieldValidator"/>

         <validator name="stringlength" class="com.opensymphony.xwork2.validator.validators.StringLengthFieldValidator"/>

         <validator name="regex" class="com.opensymphony.xwork2.validator.validators.RegexFieldValidator"/>

         <validator name="conditionalvisitor" class="com.opensymphony.xwork2.validator.validators.ConditionalVisitorFieldValidator"/>

     </validators>

　　具体配置方法示例：

UserAction.java

 1 package cn.gs.ly;

 import com.opensymphony.xwork2.ActionSupport;

 public class UserAction extends ActionSupport {

     private String username;  //不能为空

     private String password;  //不能为空 ，切三到六位数字

     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 add(){

         System.out.println("add方法执行成功");

         return SUCCESS;

     }    

     public String update(){

         System.out.println("update方法执行成功");

         return SUCCESS;

     }

 }

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

　　　　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

 <?xml version="1.0" encoding="UTF-8"?>

   <!DOCTYPE validators PUBLIC

           "-//Apache Struts//XWork Validator 1.0.3//EN"

           "http://struts.apache.org/dtds/xwork-validator-1.0.3.dtd">

     <validators>

           <field name="username">

               <field-validator type="requiredstring" >

                   <message>姓名不能为空哦。。。</message>

               </field-validator>

           </field>

           <field name="password">

               <field-validator type="requiredstring">

                   <message>密码不能为空哦。。。</message>

               </field-validator>

               <field-validator type="regex">

                   <param name="regex"><![CDATA[(\d{,})]]></param>

                   <message>密码为3-6位纯数字</message>

               </field-validator>

           </field>

       </validators>

struts.xml

 <?xml version="1.0" encoding="UTF-8"?>

  <!DOCTYPE struts PUBLIC

     "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"

     "http://struts.apache.org/dtds/struts-2.3.dtd">

 <struts>

     <constant name="struts.devMode" value="true"></constant>

     <constant name="struts.i18n.encoding" value="UTF-8"></constant>

     <constant name="struts.custom.i18n.resources" value="GS"></constant>

     <package name="mypackage" extends="struts-default">

         <global-results><!-- 全局错误页 -->

             <result name="error" type="dispatcher">/customer/error.jsp</result>

         </global-results>

     </package>

     <package name="validate" namespace="/validate" extends="struts-default">

         <action name="user_*" class="cn.gs.ly.UserAction" method="{1}">

             <result type="dispatcher" name="success">/success.jsp</result>

             <result type="dispatcher" name="error">/error.jsp</result>

             <result type="dispatcher" name="input">/{1}User.jsp</result>  <!-- 转换数据类型失败，输入验证错误 -->

         </action>

     </package>

 </struts>

　addUser.jsp

 <%@ page language="java" contentType="text/html" pageEncoding="utf-8"%>

 <%@ taglib prefix="s" uri="/struts-tags" %>

 <!DOCTYPE html>

 <html>

     <head>

         <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

         <title>Insert title here</title>

     </head>

     <body>

         <s:fielderror fieldName="username"></s:fielderror>

         <s:fielderror fieldName="password"></s:fielderror>

         <form action="${pageContext.request.contextPath }/validate/user_add" method="post" >

             姓名<input type="text" name="username"> <br>

             密码<input type="text" name="password"> <br>

             <input type="submit" value="保存">

         </form>

     </body>

 </html>

　3、自定义验证器

自定义验证器

    .编写一个类，继承FieldValidatorSupport类

    .重写 public void validate(Object object) throws ValidationException {} 方法，编写逻辑

    .注册验证器

        在WEB-INF/classes目录下(src)建立一个validators.xml 配置文件。详情参照

        /com/opensymphony/xwork2/validator/validators/default.xml

UserAction.java

 package cn.gs.ly.validators;

 import com.opensymphony.xwork2.ActionSupport;

 public class UserAction extends ActionSupport {

     private String password;

     public String getPassword() {

         return password;

     }

     public void setPassword(String password) {

         this.password = password;

     }

     @Override

     public String execute() throws Exception {

         System.out.println("执行自定义验证器");

         return SUCCESS;

     }

 }

StrongPasswordValidator.java 编写逻辑

    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

 package cn.gs.ly.validators;

 import com.opensymphony.xwork2.validator.ValidationException;

 import com.opensymphony.xwork2.validator.validators.FieldValidatorSupport;

     //1.编写一个类，继承FieldValidatorSupport类

 public class StrongPasswordValidator extends FieldValidatorSupport {

     //2.重写 public void validate(Object object) throws ValidationException {} 方法，编写逻辑

     public void validate(Object object) throws ValidationException {

         String fieldName = getFieldName();

         String filedValue = (String)getFieldValue(fieldName, object);

         System.out.print(fieldName+"=");System.out.println(filedValue);

         if(!isPasswordStrong(filedValue)){

             addFieldError(fieldName, object);

         }

     }

     private static final String GROUP1 = "abcdefghijklmnopqrstuvwxyz";

     private static final String GROUP2 = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

     private static final String GROUP3 = "";

     protected boolean isPasswordStrong(String password) {

         System.out.println("进入isPasswordString 方法,password:"+password);

         boolean ok1 = false;

         boolean ok2 = false;

         boolean ok3 = false;

         int length = password.length();

         for(int i=;i<length;i++){

             if(ok1&&ok2&&ok3){

                 break;

             }

             String character = password.substring(i,i+);

             if(GROUP1.contains(character)){

                 ok1 = true;

                 continue;

             }

             if(GROUP2.contains(character)){

                 ok2 = true;

                 continue;

             }

             if(GROUP3.contains(character)){

                 ok3 = true;

                 continue;

             }

         }

         return ok1&&ok2&&ok3;

     }

 }

validators.xml

3.注册验证器
在WEB-INF/classes目录下(src)建立一个validators.xml 配置文件。详情参照
/com/opensymphony/xwork2/validator/validators/default.xml 写法

1 <?xml version="1.0" encoding="UTF-8"?>

2 <!DOCTYPE validators PUBLIC

3         "-//Apache Struts//XWork Validator Definition 1.0//EN"

4         "http://struts.apache.org/dtds/xwork-validator-definition-1.0.dtd">

5

6 <validators>

7     <validator name="strongpassword" class="cn.gs.ly.validators.StrongPasswordValidator"/>

8 </validators>

UserAction-validation.xml 调用自定义的验证器

在动作类中的包中建立一个名称为：动作类简单名-validation.xml 使用验证器

 1 <?xml version="1.0" encoding="UTF-8"?>

 2   <!DOCTYPE validators PUBLIC

 3           "-//Apache Struts//XWork Validator 1.0.3//EN"

 4           "http://struts.apache.org/dtds/xwork-validator-1.0.3.dtd">

 5

 6     <validators>

 7

 8           <field name="password">

 9               <field-validator type="strongpassword">

10                   <message>密码过于简单。请使用数字，大小写字母混合密码</message>

11               </field-validator>

12           </field>

13

14       </validators>

15

struts.xml

 <?xml version="1.0" encoding="UTF-8"?>

  <!DOCTYPE struts PUBLIC

     "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"

     "http://struts.apache.org/dtds/struts-2.3.dtd">

 <struts>

     <constant name="struts.devMode" value="true"></constant>

     <constant name="struts.i18n.encoding" value="UTF-8"></constant>

     <constant name="struts.custom.i18n.resources" value="GS"></constant>

     <package name="mypackage" extends="struts-default">

         <global-results><!-- 全局错误页 -->

             <result name="error" type="dispatcher">/customer/error.jsp</result>

         </global-results>

     </package>

     <package name="strongpassword" namespace="/strongpassword" extends="struts-default">

         <action name="isPasswordStrong" class="cn.gs.ly.validators.UserAction" >

             <result type="dispatcher" name="success">/success.jsp</result>

             <result type="dispatcher" name="error">/error.jsp</result>

             <result type="dispatcher" name="input">/isPasswordStrong.jsp</result>

         </action>

     </package>

 </struts>

isPasswordStrong.jsp

 <%@ page language="java" contentType="text/html" pageEncoding="utf-8"%>

 <%@ taglib prefix="s" uri="/struts-tags" %>

 <!DOCTYPE html>

 <html>

     <head>

         <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

         <title>Insert title here</title>

     </head>

     <body>

         <s:fielderror fieldName="password"></s:fielderror> 

         <form action="${pageContext.request.contextPath }/strongpassword/isPasswordStrong" method="post" >

             密码<input type="text" name="password"> <br>

             <input type="submit" value="保存">

         </form>

     </body>

 </html>

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：

 <%@ page language="java" contentType="text/html" pageEncoding="utf-8"%>

 <%@ taglib prefix="s" uri="/struts-tags" %>

 <!DOCTYPE html>

 <html>

 <head>

 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

 <title>Insert title here</title>

 </head>

 <body>

     <s:text name="welcome">

         <s:param >刘超</s:param>  <!-- 给welcome添加赋值于占位符处（{*}） -->

         <s:param >go home</s:param>

     </s:text>

     <s:i18n name="cn/gs/ly/package">  <!-- 包范围 -->

         <s:text name="welcome">

             <s:param >刘超</s:param>

             <s:param >go home</s:param>

         </s:text>

     </s:i18n>

 </body>

 </html>

　　4.2、动作类中读取国际化的消息

 package cn.gs.ly;

 import com.opensymphony.xwork2.ActionContext;

 import com.opensymphony.xwork2.ActionSupport;

 public class I18nAction extends ActionSupport {

     @Override

     public String execute() throws Exception {

         //String value = getText("welcome"); //获取welcome 对应的值

         //获取welcome 对应的值 ，并添加赋值于占位符（{*}）处

         String value = getText("welcome",new String[]{"LY","good brother"});

         ActionContext.getContext().put("message", value);

         return SUCCESS;

     }

 }

表格隔行换色

 <%@ page language="java" contentType="text/html" pageEncoding="utf-8"%>

 <%@ taglib prefix="s" uri="/struts-tags" %>

 <!DOCTYPE html>

 <html>

     <head>

         <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

         <title>Insert title here</title>

     </head>

     <body>

         <s:set var="list1" value="{'a','b','c'}"></s:set>

         <table border="1" width="70%">

         <tr>

             <th>姓名</th>

             <th>性别</th>

             <th>婚否</th>

         </tr>

         <s:iterator value="#list1" status="vs">

             <tr bgcolor="${vs.index%2==0?"green":"grey" }">

                 <td>空格</td>

                 <td>空格</td>

                 <td>空格</td>

             </tr>

         </s:iterator>

     </table>

     </body>

 </html>