java - ssh integration, jsp cannot find action

Question

tool

idea

Construct

maven

Version

struts2.5 spring4.3.5 Hibernate5

question

Developed through annotations, action 404 not found on the jsp page

Error screenshot

Error message

Struts Problem Report

Struts has detected an unhandled exception:

Messages:    
There is no Action mapped for namespace [/] and action name [addUser] associated with context path [].
Stacktraces

There is no Action mapped for namespace [/] and action name [addUser] associated with context path []. - [unknown location]
    com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:192)
    org.apache.struts2.factory.StrutsActionProxy.prepare(StrutsActionProxy.java:63)
    org.apache.struts2.factory.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:37)
    com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:58)
    org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:554)
    org.apache.struts2.dispatcher.ExecuteOperations.executeAction(ExecuteOperations.java:81)
    org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:143)
    org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
    org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
    org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
    org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)
    org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
    org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
    org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:341)
    org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:783)
    org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:798)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1441)
    org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    java.lang.Thread.run(Thread.java:745)
    
You are seeing this page because development mode is enabled. Development mode, or devMode, enables extra debugging behaviors and reports to assist developers. To disable this mode, set:

  struts.devMode=false
in your WEB-INF/classes/struts.properties file.

Project structure

web.xml configuration

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

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
         http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="SSH" version="3.0">

    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>

    <!-- 配置Spring的监听器，用于初始化ApplicationContext对象 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:Spring.xml</param-value>
    </context-param>
    <!-- struts2 的配置 -->
    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
        <init-param>
            <param-name>filterConfig</param-name>
            <param-value>classpath:struts.xml</param-value>
        </init-param>
        <!-- 自动扫描action -->
        <init-param>
            <param-name>actionPackages</param-name>
            <param-value>com.ssh</param-value>
        </init-param>
    </filter>

    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

spring configuration

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.0.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">

    <context:component-scan base-package="com.lab.action.*"/>
    <context:component-scan base-package="com.lab.dao.*"/>
    <context:component-scan base-package="com.lab.service.*"/>

    <!-- dbcp配置 -->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" name=" driverClassName">
        <property name="driverClass" value="${driverClass}"/>
        <property name="jdbcUrl" value="${jdbcUrl}"/>
        <property name="user" value="${user}"/>
        <property name="password" value="${password}"/>
    </bean>

    <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="hibernateProperties">
            <props>
                <!--配置Hibernate的方言-->
                <prop key="hibernate.dialect">
                    org.hibernate.dialect.MySQLDialect
                </prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>

                <!--格式化输出sql语句-->
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.format_sql">true</prop>
                <prop key="hibernate.use_sql_comments">false</prop>
            </props>
        </property>

        <!--自动扫描实体 -->
        <property name="packagesToScan" value="com.lab.entity"/>
    </bean>

    <!-- 用注解来实现事务管理 -->
    <bean id="txManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory"/>
    </bean>
    <tx:annotation-driven transaction-manager="txManager"/>

</beans>

struts configuration

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

<!DOCTYPE struts PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
        "http://struts.apache.org/dtds/struts-2.5.dtd">

<struts>

    <!-- 指定由spring负责action对象的创建 -->
    <constant name="struts.objectFactory" value="spring" />
    <!-- 所有匹配*.action的请求都由struts2处理 -->
    <constant name="struts.action.extension" value="action" />
    <!-- 是否启用开发模式 -->
    <constant name="struts.devMode" value="true" />
    <!-- struts配置文件改动后，是否重新加载 -->
    <constant name="struts.configuration.xml.reload" value="true" />
    <!-- 设置浏览器是否缓存静态内容 -->
    <constant name="struts.serve.static.browserCache" value="false" />
    <!-- 请求参数的编码方式 -->
    <constant name="struts.i18n.encoding" value="UTF-8" />
    <!-- 每次HTTP请求系统都重新加载资源文件，有助于开发 -->
    <constant name="struts.i18n.reload" value="true" />
    <!-- 文件上传最大值 -->
    <constant name="struts.multipart.maxSize" value="104857600" />
    <!-- 让struts2支持动态方法调用 -->
    <constant name="struts.enable.DynamicMethodInvocation" value="true" />
    <!-- Action名称中是否还是用斜线 -->
    <constant name="struts.enable.SlashesInActionNames" value="false" />
    <!-- 允许标签中使用表达式语法 -->
    <constant name="struts.tag.altSyntax" value="true" />
    <!-- 对于WebLogic,Orion,OC4J此属性应该设置成true -->
    <constant name="struts.dispatcher.parametersWorkaround" value="false" />

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

    </package>
</struts>

userAction.java

package com.lab.action;

import com.lab.entity.User;
import com.lab.service.UserManager;
import com.opensymphony.xwork2.ActionSupport;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Result;
import org.apache.struts2.convention.annotation.Results;

import javax.annotation.Resource;

/**
 * Created by young on 2017/6/17.
 */

@Results({@Result(name = "success", location = "/success.jsp"),
        @Result(name = "failure", location = "/failure.jsp")})
public class UserAction extends ActionSupport {
    @Resource
    private UserManager userManager;
    private User user;

    @Action(value = "addUser")
    public String addUser() {
        try {
            userManager.addUser(user);
        } catch (Exception e) {
            e.printStackTrace();
            return "failure";
        }
        return "success";

    }

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

}

refer to

Mainly for reference, annotation-based SSH simplifies configuration to the extreme

Answer 1

UserAction class plus @Namespace("/")