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Struts2 自定义输入校验第五弹

　　Struts2的校验框架有两种：一种是validate方法，另一种是有效的xml文件。

Action中自定义方法的输入校验，对于通过action的method属性所指定的自定义方法myExecute，其对应的自定义输入校验方法名为validateMyExecute(假设自定义的方法名为myExecute),底层是通过反射机制来调用的。

当在Action中制定了自定义的excute方法时，首先会执行自定义的excute方法所对应的输入校验方法，然后再去执行validate方法，执行完毕后如果出现了任何错误都不会再去执行自定义的excute方法，流程会转向了input这个返回结果的页面上面。

自定义Field级别的错误提示消息

1）新建一个以action命名的properties文件，如RegisterAction.properties

2）然后在该属性文件中指定每一个出错的字段的错误消息。指定方式：invalid.fieldvalue.具体属性 = 具体错误提示信息

--start 自定义方法的校验 ---

 1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 2 <%@ taglib prefix="s" uri="/struts-tags" %>
 3 <%
 4 String path = request.getContextPath();
 5 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 6 %>
 7 
 8 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 9 <html>
10   <head>
11     <base href="<%=basePath%>">
12     
13     <title>My JSP 'register.jsp' starting page</title>
14     
15     <meta http-equiv="pragma" content="no-cache">
16     <meta http-equiv="cache-control" content="no-cache">
17     <meta http-equiv="expires" content="0">    
18     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
19     <meta http-equiv="description" content="This is my page">
20     <!--
21     <link rel="stylesheet" type="text/css" href="styles.css">
22     -->
23 
24   </head>
25   
26   <body>
27     <h2><font color="blue">用户注册</font></h2>
28     
29     <s:actionerror cssStyle="color:red"/>
30     
31     ----------------------------------------
32     
33     <s:fielderror cssStyle="color:blue"></s:fielderror>
34     
35     <!-- 
36     <form action="register.action">
37     
38     username: <input type="text" name="username" size="20"><br>
39     password: <input type="password" name="password" size="20"><br>
40     repassword: <input type="password" name="repassword" size="20"><br>
41     age: <input type="text" name="age" size="20"><br>
42     birthday: <input type="text" name="birthday" size="20"><br>
43     graduation: <input type="text" name="graduation" size="20"><br>
44     
45     <input type="submit" value="submit"/>
46     
47     </form>
48      -->
49     <s:form action="register.action" theme="simple">
50     
51     username: <s:textfield name="username" label="username"></s:textfield><br>
52     password: <s:password name="password" label="password"></s:password><br>
53     repassword: <s:password name="repassword" label="repassword"></s:password><br>
54     age: <s:textfield name="age" label="age"></s:textfield><br>
55     birthday: <s:textfield name="birthday" label="birthday"></s:textfield><br>
56     graduation: <s:textfield name="graduation" label="graduation"></s:textfield><br>
57     
58     <s:submit value="submit"></s:submit>
59     </s:form>
60     
61   </body>
62 </html>

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
    xmlns="http://java.sun.com/xml/ns/javaee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  
  <filter>
      <filter-name>struts2</filter-name>
      <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  
  <filter-mapping>
      <filter-name>struts2</filter-name>
      <url-pattern>/*</url-pattern>
  </filter-mapping>
  
</web-app>

web.xml

  1 import java.util.Date;
  2 
  3 import com.opensymphony.xwork2.ActionSupport;
  4 
  5 public class RegisterAction extends ActionSupport
  6 {
  7     private String username;
  8     
  9     private String password;
 10     
 11     private String repassword;
 12     
 13     private int age;
 14     
 15     private Date birthday;
 16     
 17     private Date graduation;
 18 
 19     public String getUsername()
 20     {
 21         return username;
 22     }
 23 
 24     public void setUsername(String username)
 25     {
 26         this.username = username;
 27     }
 28 
 29     public String getPassword()
 30     {
 31         return password;
 32     }
 33 
 34     public void setPassword(String password)
 35     {
 36         this.password = password;
 37     }
 38 
 39     public String getRepassword()
 40     {
 41         return repassword;
 42     }
 43 
 44     public void setRepassword(String repassword)
 45     {
 46         this.repassword = repassword;
 47     }
 48 
 49     public int getAge()
 50     {
 51         return age;
 52     }
 53 
 54     public void setAge(int age)
 55     {
 56         this.age = age;
 57     }
 58 
 59     public Date getBirthday()
 60     {
 61         return birthday;
 62     }
 63 
 64     public void setBirthday(Date birthday)
 65     {
 66         this.birthday = birthday;
 67     }
 68     
 69     public Date getGraduation()
 70     {
 71         return graduation;
 72     }
 73 
 74     public void setGraduation(Date graduation)
 75     {
 76         this.graduation = graduation;
 77     }
 78 
 79     @Override
 80     public String execute() throws Exception
 81     {
 82         System.out.println(this.birthday);
 83         
 84         return SUCCESS;
 85     }
 86     
 87     public String myExecute() throws Exception
 88     {
 89         System.out.println("myExecute invoked!");
 90         
 91         return SUCCESS;
 92     }
 93     
 94     public void validateMyExecute()
 95     {
 96         System.out.println("validateMyExecute invoked!!");
 97     }
 98     
 99     
100     @Override
101     public void validate()
102     {
103         System.out.println("validate invoked!");
104     }
105 //    @Override
106 //    public void validate()
107 //    {
108 //        if(null == username || username.length() < 4 || username.length() > 6)
109 //        {
110 //            this.addActionError("username invalid");
111 //            
112 //            this.addFieldError("username", "u7528u6237u540du4e0du5408u6cd5");
113 //        }
114 //        
115 //        if(null == password || password.length() < 4 || password.length() > 6)
116 //        {
117 //            this.addActionError("password invalid");
118 //        }
119 //        else if(null == repassword || repassword.length() < 4 || repassword.length() > 6)
120 //        {
121 //            this.addActionError("repassword invalid");
122 //        }
123 //        else if(!password.equals(repassword))
124 //        {
125 //            this.addActionError("the passwords not the same");
126 //        }
127 //        
128 //        if(age < 10 || age > 50)
129 //        {
130 //            this.addActionError("age invalid");
131 //        }
132 //        
133 //        if(null == birthday)
134 //        {
135 //            this.addActionError("birthday invalid");
136 //        }
137 //        
138 //        if(null == graduation)
139 //        {
140 //            this.addActionError("graduation invalid");
141 //        }
142 //        
143 //        if(null != birthday && null != graduation)
144 //        {
145 //            Calendar c1 = Calendar.getInstance();
146 //            c1.setTime(birthday);
147 //            
148 //            Calendar c2 = Calendar.getInstance();
149 //            c2.setTime(graduation);
150 //            
151 //            if(!c1.before(c2))
152 //            {
153 //                this.addActionError("birthday should be before graduation");
154 //            }
155 //        }
156 //        
157 //        //this.getFieldErrors().clear();
158 //        //this.getActionErrors().clear();
159 //        
160 ////        this.clearActionErrors();
161 ////        this.clearFieldErrors();
162 //        
163 //        System.out.println("invoked!!!");
164 //    }
165     
166 }

RegisterAction

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'registerResult.jsp' starting page</title>
    
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->

  </head>
  
  <body>
    
    username: <s:property value="username"/><br>
    password: <s:property value="password"/><br>
    age:<s:property value="age"/><br>
    birthday:<s:property value="birthday"/><br>
    graduate:<s:property value="graduation"/>
  </body>
</html>

registerResult.jsp

--end 自定义方法的校验 ---

自带的validateFailed 消息是不明确的，需要自行修改。可以通过自定义属性文件实现（RegisterAction.properties，需要和action同路径）

1 invalid.fieldvalue.age=u5E74u9F84u4E0Du5408u6CD5!
2 invalid.fieldvalue.birthday=u751Fu65E5u65E5u671Fu4E0Du5408u6CD5
3 invalid.fieldvalue.graduation=u6BD5u4E1Au65E5u671Fu4E0Du5408u6CD5

RegisterAction.properties

其中，invalid.fieldvalue.age中的invalid.fieldvalue是固定的，不可修改。

如果提示中文的消息native2ascii.exe 是将中文转化为ASCII码（在jdk/bin目录下面，如果转化直接输入中文敲回车即可！）

第二种校验方法：有效的xml文件，具体分为字段优先的和校验器优先的

需要将***-validation.xml的文件放置在对应的action路径下面。

比如如果要验证RegisterAction，则需要命名为：RegisterAction-validation.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 
 3 <!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 1.0.2//EN" "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">
 4 
 5 <validators>
 6 <!-- 
 7     <field name="username">
 8         <field-validator type="requiredstring">
 9             <param name="trim">false</param>
10             <message>username can't be blank!</message>
11         </field-validator>
12         <field-validator type="stringlength">
13             <param name="minLength">4</param>
14             <param name="maxLength">6</param>
15             <param name="trim">false</param>
16             <message key="username.invalid"></message>
17         </field-validator>
18     </field>
19     
20     <field name="password">
21         <field-validator type="requiredstring">
22             <message>password can't be blank!</message>
23         </field-validator>
24         <field-validator type="stringlength">
25             <param name="minLength">4</param>
26             <param name="maxLength">6</param>
27             <message>length of password should be between ${minLength} and ${maxLength}</message>
28         </field-validator>
29     </field>
30     
31     <field name="age">
32         <field-validator type="required">
33             <message>age can't be blank!</message>
34         </field-validator>
35         <field-validator type="int">
36             <param name="min">10</param>
37             <param name="max">40</param>
38             <message>age should be between ${min} and ${max}</message>
39         </field-validator>
40         
41     </field>
42     
43     <field name="birthday">
44         <field-validator type="required">
45             <message>birthday can't be blank!</message>
46         </field-validator>
47         <field-validator type="date">
48             <param name="min">2005-1-1</param>
49             <param name="max">2007-12-31</param>
50             <message>birthday should be between ${min} and ${max}</message>
51         </field-validator>
52     </field>
53     
54  -->    
55     
56     <validator type="requiredstring">
57         <param name="fieldName">username</param>
58         <message>username can't be blank!</message>
59     </validator>
60     
61     <validator type="stringlength">
62         <param name="fieldName">username</param>
63         <param name="minLength">4</param>
64         <param name="maxLength">6</param>
65         <message>length of username should be between ${minLength} and ${maxLength}</message>
66     </validator>
67     
68     <field name="birthday">
69         <field-validator type="required">
70             <message>birthday can't be blank!</message>
71         </field-validator>
72         <field-validator type="date">
73             <param name="min">2005-1-1</param>
74             <param name="max">2007-12-31</param>
75             <message>birthday should be between ${min} and ${max}</message>
76         </field-validator>
77     </field>
78 </validators>

RegisterAction-validation.xml

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原文地址：https://www.cnblogs.com/feiguo/p/8151422.html

Struts2 自定义输入校验 第五弹

Struts2 自定义输入校验第五弹