java - Struts 2 和 Hibernate 登录表单

Question

我正在尝试使用 struts 和 hibernate 构建一个简单的登录表单。 Index.jsp是欢迎文件，用户成功登录后将被重定向到home.jsp。我正在使用自定义拦截器，以便在不登录的情况下无法直接访问 home.jsp。我面临的问题是

1. 我在运行应用程序时遇到此异常

   org.apache.jasper.JasperException:找不到 Struts 调度程序。
   这通常是由于使用 Struts 标签而没有关联的过滤器造成的。Struts 标签仅当请求通过其 servlet 过滤器时才可用，它初始化该标签所需的 Struts 调度程序。 - [未知位置]

2. 无需登录即可直接访问home.jsp。

以下是文件web.xml

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

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
     version="3.1">
    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>

    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>

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

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

struts.xml

<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
        <!-- Configuration for the default package. -->
        <package name="default" extends="hibernate-default">
            <Interceptors>
                <Interceptor name="LoginInterceptor" class="com.riteshsangwan.ossoc.interceptors.LoginInterceptor" />
            </Interceptors>

            <action name="login" class="com.riteshsangwan.ossoc.action.LoginAction">
                <result name="success" type="chain">wolcomeaction</result>
                <result name="imput">/index.jsp</result>
                <result name="error">/index.jsp</result>
            </action>

            <action name="welcomeaction">
                <interceptor-ref name="LoginInterceptor"></interceptor-ref>
                <interceptor-ref name="defaultStack"></interceptor-ref>
                <result name="login">/index.jsp</result>
                <result name="success" >/home.jsp</result>

            </action>
        </package>
</struts>

LoginInterceptor.java

package com.riteshsangwan.ossoc.interceptors;

import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
import com.opensymphony.xwork2.Action;
import java.util.Map;

public class LoginInterceptor extends AbstractInterceptor{

    @Override
    public String intercept(ActionInvocation ai) throws Exception {
        Map<String, Object> session= ai.getInvocationContext().getSession();
        if(session.get("userObject")==null)
        {
            return Action.LOGIN;
        }
        else
        {
            return Action.SUCCESS;
        }

    }

}

LoginAction.java

package com.riteshsangwan.ossoc.action;
import com.opensymphony.xwork2.ActionSupport;
import com.riteshsangwan.ossoc.entities.Users;
import org.apache.commons.lang.StringUtils;
import com.riteshsangwan.ossoc.business.UsersDAOImpl;
import java.util.Map;
import javax.servlet.http.HttpSession;
import org.apache.struts2.interceptor.SessionAware;

public class LoginAction extends ActionSupport implements SessionAware{
    private String email;
    private String password;
    private Users user;
    private Map<String, Object> userSession;

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String execute(){
        if(verify())
        {
            return ActionSupport.SUCCESS;
        }

        else
        {
            return ActionSupport.LOGIN;
        }

}

    @Override
    public void validate(){
        if(StringUtils.isEmpty(getEmail()) || StringUtils.isEmpty(getPassword()))
        {
            addFieldError("Error","oops! something went wrong try again");
        }
    }

    private boolean verify(){
        String email=getEmail();
        String password=getPassword();
        UsersDAOImpl udl=new UsersDAOImpl();
        user = udl.LoginVerify(email, password);
        if(user!=null)
        {
            userSession.put("userObject", user);
            userSession.put("userName", user.getFname()+" "+user.getLname());
            userSession.put("email", user.getEmail());
            userSession.put("userId", user.getUid());
            return true;
        }
        else
        {
            return false;
        }
    }

    @Override
    public void setSession(Map<String, Object> map) {
        userSession=map;
    }


}

index.jsp

<%@page 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>Login</title>
    </head>
    <body>
        <s:form action="login" method="POST">
            <fieldset>
                <s:label>Email:</s:label>
                <s:textfield name="email"></s:textfield>
                <s:label>Password:</s:label>
                <s:password name="password"></s:password>
                <s:submit name="loginsubmit"></s:submit>
            </fieldset>
        </s:form>
    </body>
</html>

编辑:pom.xml 文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.riteshsangwan</groupId>
    <artifactId>ossoc</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <name>ossoc</name>

    <properties>
        <endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-web-api</artifactId>
            <version>7.0</version>
            <type>jar</type>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.5</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>4.2.8.Final</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>4.2.8.Final</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate.javax.persistence</groupId>
            <artifactId>hibernate-jpa-2.0-api</artifactId>
            <version>1.0.1.Final</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate.common</groupId>
            <artifactId>hibernate-commons-annotations</artifactId>
            <version>4.0.4.Final</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-testing</artifactId>
            <version>4.2.8.Final</version>
        </dependency>

        <dependency>
            <groupId>com.jgeppert.struts2.jquery</groupId>
            <artifactId>struts2-jquery-plugin</artifactId>
            <version>3.6.1</version>
        </dependency>

        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

        <dependency>
            <groupId>org.apache.struts</groupId>
            <artifactId>struts2-core</artifactId>
            <version>2.3.15.3</version>
        </dependency>

        <dependency>
            <groupId>org.apache.struts</groupId>
            <artifactId>struts2-spring-plugin</artifactId>
            <version>2.3.15.3</version>
        </dependency>

        <dependency>
            <groupId>org.apache.struts</groupId>
            <artifactId>struts2-junit-plugin</artifactId>
            <version>2.3.15.3</version>
        </dependency>

       <dependency>        
            <groupId>com.opensymphony</groupId>
            <artifactId>xwork-core</artifactId>
            <version>2.1.6</version>
          <type>jar</type>
       </dependency>    

       <dependency>        
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.27</version>
       </dependency>    



       <dependency>        
            <groupId>org.apache.struts.xwork</groupId>
            <artifactId>xwork-core</artifactId>
            <version>2.3.15.3</version>
       </dependency>                                

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                    <compilerArguments>
                        <endorseddirs>${endorsed.dir}</endorseddirs>
                    </compilerArguments>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.3</version>
                <configuration>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <version>2.6</version>
                <executions>
                    <execution>
                        <phase>validate</phase>
                        <goals>
                            <goal>copy</goal>
                        </goals>
                        <configuration>
                            <outputDirectory>${endorsed.dir}</outputDirectory>
                            <silent>true</silent>
                            <artifactItems>
                                <artifactItem>
                                    <groupId>javax</groupId>
                                    <artifactId>javaee-endorsed-api</artifactId>
                                    <version>7.0</version>
                                    <type>jar</type>
                                </artifactItem>
                            </artifactItems>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

Answer 1

过滤器映射有点不正确，正确的映射应该是:

<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>

其次，拦截器声明有点错误(大小写问题)。示例登录拦截器堆栈可能如下所示:

 <interceptors>
            <interceptor name="nlogin" class="interceptors.LoginInterceptor"/>
            <interceptor-stack name="loginStack">
                <interceptor-ref name="nlogin"/>
                <interceptor-ref name="store">
                    <param name="operationMode">AUTOMATIC</param>
                </interceptor-ref>
                <interceptor-ref name="defaultStack"/>
            </interceptor-stack>
        </interceptors>

        <default-interceptor-ref name="loginStack"/>

default-interceptor-ref 负责处理将为该包中定义的所有操作执行的默认拦截器堆栈。

第三，拦截器的代码总是执行并返回结果，而不给其他拦截器，甚至是要执行的 Action 。示例登录拦截器如下所示:

@Override
    public String intercept(ActionInvocation ai) throws Exception {
        try {
            if (ai.getInvocationContext().getSession().get("admin") == null) {
                Object action = ai.getAction();
                if (action instanceof ValidationAware) {
                    ((ValidationAware) action).addActionError("Unauthorized access. Please Login first");
                }
                return "login";
            }
            return ai.invoke();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return ai.invoke();
    }