struts

HTTP Status 404 - There is no Action mapped for namespace [/] and action nam

struts.xml 文件一定要放到src 目录下面。

struts.xml    注意：

struts-2.3.dtd  版本号要与jar包中的对应！

<?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>
    <package name="default" extends="struts-default">
        <action name="register" class="RegisterAction">
            <result name="success">welcome.jsp</result>
        </action>
    </package>
</struts>

web.xml

<?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>Struts2Filter</filter-name>
        <filter-class>
            org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter   // 注意这一句，这是新的写法，有的教程过时了。
        </filter-class>
    </filter>
    <filter-mapping>
        <filter-name>Struts2Filter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <welcome-file-list> 
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
</web-app>

 校验器代码：

<?xml version="1.0" encoding="UTF-8"?>
        
<!DOCTYPE validators PUBLIC  "-//OpenSymphony Group//XWork Validator 1.0.2//EN"  
 "//www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">

<!-- START SNIPPET: validators-default -->
<validators>

    <field name="user.username" type="requiedstring">
        <field-validator>
            <param name="trim">true</param>
            <message>用户名不能为空</message>
        </field-validator>

    </field>
    <field name="user.password">
        <field-validator type="requiredstring">
            <param name="min">6</param>
            <param name="min">10</param>
            <message>必须在长度是6~10之间</message>
        </field-validator>
      
        <field-validator   type="regex">
        <param   name="expression"><![CDATA[(w{6,16})]]></param>
            <message>用户名输入不合法，必须为长度在6~16中间的数字或字母</message>
        </field-validator>
         
    </field>


</validators>

User.hbm.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
         "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
    <class name="com.ssh.beans.User" table="user">
        <id name="id" column="userId" type="java.lang.long">
            <generator class="native"></generator> 
        </id>
        <property name="username" column="username" type="java.lang.String" />
        <property name="password" column="password" type="java.lang.String"/>
        <property name="gender" column="gender" type="java.lang.Interger" />
    </class>
    
</hibernate-mapping>

Hibernate.cfg.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
    
     <property name="hibernate.connection.url">
            jdbc:mysql://localhost:3306/test
        </property>
        <property name="hibernate.connection.driver_class">
            com.mysql.jdbc.Driver
        </property>
        <property name="hibernate.connection.username">
            root
        </property>
        <property name="hibernate.connection.password">
            qduwky
        </property>
        <property name="hibernate.dialect">
            org.hibernate.dialect.MySQLDialect
        </property>
        <property name="show_sql">
            false
        </property>
        <mapping resource="com.ssh.beans/User.hbm.xml" />
    </session-factory>
</hibernate-configuration>