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

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

UserAction.java


 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   对add（）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 }

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

 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：

UserAction.java


 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 }

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

 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           <field name="username">
 8               <field-validator type="requiredstring" >
 9                   <message>姓名不能为空哦。。。</message>
10               </field-validator>
11           </field>
12           
13           <field name="password">
14               <field-validator type="requiredstring">
15                   <message>密码不能为空哦。。。</message>
16               </field-validator>
17               <field-validator type="regex">
18                   <param name="regex"><![CDATA[(d{3,6})]]></param>
19                   <message>密码为3-6位纯数字</message>
20               </field-validator>
21           </field>
22         
23       </validators>

struts.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>

　addUser.jsp

 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:fielderror fieldName="username"></s:fielderror>
11         <s:fielderror fieldName="password"></s:fielderror>
12         <form action="${pageContext.request.contextPath }/validate/user_add" method="post" >
13             姓名<input type="text" name="username"> <br>             
14             密码<input type="text" name="password"> <br>
15             
16             <input type="submit" value="保存">
17         </form>
18 
19     </body>
20 </html>

　3、自定义验证器

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。详情参照
        /com/opensymphony/xwork2/validator/validators/default.xml

UserAction.java

 1 package cn.gs.ly.validators;
 2 
 3 import com.opensymphony.xwork2.ActionSupport;
 4 
 5 public class UserAction extends ActionSupport {
 6 
 7     private String password;  
 8     public String getPassword() {
 9         return password;
10     }
11     public void setPassword(String password) {
12         this.password = password;
13     }
14     
15     
16     @Override
17     public String execute() throws Exception {
18         System.out.println("执行自定义验证器");
19         return SUCCESS;
20     }
21 
22 }

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

 1 package cn.gs.ly.validators;
 2 
 3 import com.opensymphony.xwork2.validator.ValidationException;
 4 import com.opensymphony.xwork2.validator.validators.FieldValidatorSupport;
 5     //1.编写一个类，继承FieldValidatorSupport类
 6 public class StrongPasswordValidator extends FieldValidatorSupport {
 7     
 8     //2.重写 public void validate(Object object) throws ValidationException {} 方法，编写逻辑
 9     public void validate(Object object) throws ValidationException {
10         String fieldName = getFieldName();
11         String filedValue = (String)getFieldValue(fieldName, object);
12         
13         System.out.print(fieldName+"=");System.out.println(filedValue);
14         
15         if(!isPasswordStrong(filedValue)){
16             addFieldError(fieldName, object);
17         }
18     }
19     
20     
21     private static final String GROUP1 = "abcdefghijklmnopqrstuvwxyz";
22     private static final String GROUP2 = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
23     private static final String GROUP3 = "0123456789";
24     
25     protected boolean isPasswordStrong(String password) {
26         System.out.println("进入isPasswordString 方法,password:"+password);
27         boolean ok1 = false;
28         boolean ok2 = false;
29         boolean ok3 = false;
30         int length = password.length();
31         
32         for(int i=0;i<length;i++){
33             if(ok1&&ok2&&ok3){
34                 break;
35             }
36             
37             String character = password.substring(i,i+1);
38             if(GROUP1.contains(character)){
39                 ok1 = true;
40                 continue;
41             }
42             if(GROUP2.contains(character)){
43                 ok2 = true;
44                 continue;
45             }
46             if(GROUP3.contains(character)){
47                 ok3 = true;
48                 continue;
49             }
50         }
51         return ok1&&ok2&&ok3;
52     }
53 }

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

 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="strongpassword" namespace="/strongpassword" extends="struts-default">
17         <action name="isPasswordStrong" class="cn.gs.ly.validators.UserAction" >
18             <result type="dispatcher" name="success">/success.jsp</result>
19             <result type="dispatcher" name="error">/error.jsp</result>
20             <result type="dispatcher" name="input">/isPasswordStrong.jsp</result>
21         </action>
22     </package>
23 
24 </struts>

isPasswordStrong.jsp

 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:fielderror fieldName="password"></s:fielderror> 
11         
12         <form action="${pageContext.request.contextPath }/strongpassword/isPasswordStrong" method="post" >        
13             密码<input type="text" name="password"> <br>            
14             <input type="submit" value="保存">
15         </form>        
16     </body>
17 </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}   u6B22u8FCEu6765u5230u8FD9u91CC."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 }

表格隔行换色

 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:set var="list1" value="{'a','b','c'}"></s:set>        
11         <table border="1" width="70%">
12         <tr>
13             <th>姓名</th>
14             <th>性别</th>
15             <th>婚否</th>
16         </tr>        
17         <s:iterator value="#list1" status="vs">
18             <tr bgcolor="${vs.index%2==0?"green":"grey" }">
19                 <td>空格</td>
20                 <td>空格</td>
21                 <td>空格</td>
22             </tr>
23         </s:iterator>
24     </table>
25     
26     </body>
27 </html>