一个账号只能在一个设备登录java java多用户登录

之前我们基于XML文件写了一个简单的Spring Security登录的小例子，在这篇文章中，我们基于Hibernate连接数据库来持久化我们的用户信息，实现多用户角色登录。

1. 我们需要写些什么？

a.配置一个Spring Servlet

b.将Spring Security加载到上下文中，设置Security的启动器

c.配置Hibernate

d.编写用户实体

e.编写我们用户查询(分为DAO层查询功能以及Service层用户查询服务)

f.编写负责路由的Controller

项目结构如下：

pom.xml如下，你也可以自己配置相关依赖，注意依赖版本对应匹配

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.example</groupId>
  <artifactId>demo</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>demo Maven Webapp</name>
  <url>http://maven.apache.org</url>

  <properties>
    <springframework.version>4.1.6.RELEASE</springframework.version>
    <springsecurity.version>4.0.1.RELEASE</springsecurity.version>
    <hibernate.version>4.3.6.Final</hibernate.version>
    <mysql.connector.version>5.1.31</mysql.connector.version>
  </properties>

  <dependencies>

    <!-- Spring -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${springframework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${springframework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${springframework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${springframework.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-orm</artifactId>
      <version>${springframework.version}</version>
    </dependency>


    <!-- Spring Security -->
    <dependency>
      <groupId>org.springframework.security</groupId>
      <artifactId>spring-security-web</artifactId>
      <version>${springsecurity.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework.security</groupId>
      <artifactId>spring-security-config</artifactId>
      <version>${springsecurity.version}</version>
    </dependency>

    <!-- Hibernate -->
    <dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-core</artifactId>
      <version>${hibernate.version}</version>
    </dependency>

    <!-- MySQL -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${mysql.connector.version}</version>
    </dependency>

    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>javax.servlet.jsp-api</artifactId>
      <version>2.3.1</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
  </dependencies>

  <build>
    <pluginManagement>
      <plugins>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-war-plugin</artifactId>
          <version>2.4</version>
          <configuration>
            <warSourceDirectory>src/main/webapp</warSourceDirectory>
            <warName>SpringSecurityRoleBasedLoginExample</warName>
            <failOnMissingWebXml>false</failOnMissingWebXml>
          </configuration>
        </plugin>
      </plugins>
    </pluginManagement>
    <finalName>demo</finalName>
  </build>
</project>

2.配置一个我们的SpringMVC项目的框架：

这里我们解释一下下面的getRootConfigClasses和getServletConfigClasses两个函数。

这两个函数分别是配置ContextLoaderListener和DispatcherServlet两个容器由ContextLoaderListener加载的父容器(RootConfig.class)以及由DispatcherServlet加载的子容器(WebConfig.class)
RootConfig.java用于加载非web组件,无需使用@EnableWebMvc.

WebConfig.java用于加载web组件,它是RootApplication的子容器,一般加载Controller,ViewResolver以及HandlerMapping.所以在这里我们要把Security的配置加载在这里

package com.example.configuration;

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

/**
 * Created by YanMing on 2017/3/16.
 */
public class AppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class[]{SecurityConfig.class};
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        return new Class[]{WebConfig.class};
    }

    @Override
    protected String[] getServletMappings() {
        return new String[]{"/"};
    }
}

package com.example.configuration;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;

/**
 * Created by YanMing on 2017/3/16.
 */
@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.example")
public class WebConfig extends WebMvcConfigurerAdapter {

    @Bean
    public ViewResolver viewResolver() {
        InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
        viewResolver.setViewClass(JstlView.class);
        viewResolver.setPrefix("/WEB-INF/views/");
        viewResolver.setSuffix(".jsp");

        return viewResolver;
    }


    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/static/**").addResourceLocations("/static/");
    }
}

package com.example.configuration;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.web.csrf.CsrfTokenRepository;
import org.springframework.security.web.csrf.HttpSessionCsrfTokenRepository;

/**
 * Created by YanMing on 2017/3/16.
 */
@EnableWebSecurity
@Configuration
@ComponentScan
public class SecurityConfig extends WebSecurityConfigurerAdapter{

    @Autowired(required = true)
    MySuccessHandler customSuccessHandler;

    /*@Autowired
    public void configureGlobalSecurity(AuthenticationManagerBuilder auth) throws Exception {
        auth.inMemoryAuthentication().withUser("admin").password("admin").roles("ADMIN");
        auth.inMemoryAuthentication().withUser("user").password("user").roles("USER");
        auth.inMemoryAuthentication().withUser("dba").password("dba").roles("DBA");

    }*/

    @Autowired
    @Qualifier("customUserDetailsService")
    UserDetailsService userDetailsService;

    @Autowired
    public void configureGlobalSecurity(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService);
    }


    @Override
    protected void configure(HttpSecurity http) throws Exception {

        http.authorizeRequests()
                .antMatchers("/","/home").access("hasRole('ROLE_USER')")
                .antMatchers("/admin").access("hasRole('ROLE_ADMIN')")
                .antMatchers("/db").access("hasRole('ROLE_DBA')")
                .and()
                .formLogin().loginPage("/login").failureUrl("/login?error").successHandler(customSuccessHandler)
                .usernameParameter("username").passwordParameter("password")
                .and()
                .logout().logoutSuccessUrl("/login?logout")
                .and().csrf().disable();


    }
}

package com.example.configuration;

import org.springframework.security.web.context.AbstractSecurityWebApplicationInitializer;

/**
 * Created by YanMing on 2017/3/16.
 */
public class SecurityWebApplicationInitializer extends AbstractSecurityWebApplicationInitializer {
}

注释掉的部分对应我们使用缓存来存储用户名信息，而不是使用持久化技术。@Qualifier和@Autowired配合使用，解决我们的(不)存在多个同类型Bean时的情况，这里不是必需。

我们覆盖了configure函数，这个函数中，我们对不同url的设置权限，设置登录/登出页面url匹配，设置登录失败页面url匹配，禁用CSRF（我们的应用中暂时不涉及CSRF相关，有兴趣的朋友自行百度）

3.接下来，我们需要配置我们的Hibernate中的session、dataSource等：

package com.example.configuration;

import java.util.Properties;

import javax.sql.DataSource;

import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.orm.hibernate4.HibernateTransactionManager;
import org.springframework.orm.hibernate4.LocalSessionFactoryBean;
import org.springframework.transaction.annotation.EnableTransactionManagement;

/**
 * Created by YanMing on 2017/3/17.
 */
@Configuration
@EnableTransactionManagement
@ComponentScan({ "com.example.configuration" })
@PropertySource(value = {"classpath:application.properties"})
public class HibernateConfig {

    @Autowired
    private Environment environment;

    @Bean
    public LocalSessionFactoryBean sessionFactory() {
        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
        sessionFactory.setDataSource(dataSource());
        sessionFactory.setPackagesToScan(new String[] { "com.example.Entity" });
        sessionFactory.setHibernateProperties(hibernateProperties());
        return sessionFactory;
    }

    @Bean
    public DataSource dataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName(environment.getRequiredProperty("jdbc.driverClassName"));
        dataSource.setUrl(environment.getRequiredProperty("jdbc.url"));
        dataSource.setUsername(environment.getRequiredProperty("jdbc.username"));
        dataSource.setPassword(environment.getRequiredProperty("jdbc.password"));
        return dataSource;
    }

    private Properties hibernateProperties() {
        Properties properties = new Properties();
        properties.put("hibernate.dialect", environment.getRequiredProperty("hibernate.dialect"));
        properties.put("hibernate.show_sql", environment.getRequiredProperty("hibernate.show_sql"));
        properties.put("hibernate.format_sql", environment.getRequiredProperty("hibernate.format_sql"));
        return properties;
    }

    @Bean
    @Autowired
    public HibernateTransactionManager transactionManager(SessionFactory s) {
        HibernateTransactionManager txManager = new HibernateTransactionManager();
        txManager.setSessionFactory(s);
        return txManager;
    }
}

Hibernate这部分内容移步，或者看Spring实战Hibernate部分。在这里我们了解session以及DataSource即可。

application.properties

jdbc.driverClassName = com.mysql.jdbc.Driver
jdbc.url = jdbc:mysql://localhost:3306/spring
jdbc.username = root
jdbc.password =root
hibernate.dialect = org.hibernate.dialect.MySQLDialect
hibernate.show_sql = true
hibernate.format_sql = true

文件位置见项目结构图。

4.接下来，我们就要创建我们的User实体：

package com.example.Entity;

/**
 * Created by YanMing on 2017/3/17.
 */
import java.util.HashSet;
import java.util.Set;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.Table;

@Entity
@Table(name = "UserList")
public class User {

    @Id @GeneratedValue(strategy=GenerationType.IDENTITY)
    private int id;

    @Column(name="SSO_ID", unique=true, nullable=false)
    private String ssoId;

    @Column(name="PASSWORD", nullable=false)
    private String password;

    @Column(name="STATE", nullable=false)
    private String state="Active";

    @Column(name="type",nullable = false)
    private String type;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getSsoId() {
        return ssoId;
    }

    public void setSsoId(String ssoId) {
        this.ssoId = ssoId;
    }

    public String getPassword() {
        return password;
    }

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



    public String getState() {
        return state;
    }

    public void setState(String state) {
        this.state = state;
    }


    public String getUserType(){
        return this.type;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + id;
        result = prime * result + ((ssoId == null) ? 0 : ssoId.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (!(obj instanceof User))
            return false;
        User other = (User) obj;
        if (id != other.id)
            return false;
        if (ssoId == null) {
            if (other.ssoId != null)
                return false;
        } else if (!ssoId.equals(other.ssoId))
            return false;
        return true;
    }

    @Override
    public String toString() {
        return "User [id=" + id + ", ssoId=" + ssoId + ", password=" + password
                + ", state=" + state + ", type=" +"]";
    }


}

这部分就是使用Spring一些注解创建了我们的实体，注解我们之前都介绍过，这里再简单介绍一下：

@Entity标记类为实体

@Table类对应数据库中的表

@Id表主键 @GeneratedValue 表中自增Id

@Column表的列

接下来就是编写我们的查询功能(DAO)以及查询服务(Service)

5.DAO层功能接口及实现：

package com.example.dao;

import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;

import java.io.Serializable;
import java.lang.reflect.ParameterizedType;

/**
 * Created by YanMing on 2017/3/17.
 */
public abstract class AbstractDao<PK extends Serializable, T> {

    private final Class<T> persistentClass;

    @SuppressWarnings("unchecked")
    public AbstractDao(){
        this.persistentClass =(Class<T>) ((ParameterizedType) this.getClass().getGenericSuperclass()).getActualTypeArguments()[1];
    }

    @Autowired
    private SessionFactory sessionFactory;

    protected Session getSession(){
        return sessionFactory.getCurrentSession();
    }

    @SuppressWarnings("unchecked")
    public T getByKey(PK key) {
        return (T) getSession().get(persistentClass, key);
    }

    public void persist(T entity) {
        getSession().persist(entity);
    }

    public void delete(T entity) {
        getSession().delete(entity);
    }

    protected Criteria createEntityCriteria(){
        return getSession().createCriteria(persistentClass);
    }

}

Hibernate 获取当前session

package com.example.dao;

import com.example.Entity.User;

/**
 * Created by YanMing on 2017/3/17.
 */
public interface UserDao {
    User findById(int id);

    User findBySSO(String sso);
}

package com.example.dao;

import com.example.Entity.User;
import org.hibernate.Criteria;
import org.hibernate.criterion.Restrictions;
import org.springframework.stereotype.Repository;

/**
 * Created by YanMing on 2017/3/17.
 */
@Repository("userDao")
public class UserDaoImpl extends AbstractDao<Integer, User> implements UserDao {

    public User findById(int id) {
        return getByKey(id);
    }

    public User findBySSO(String sso) {
        Criteria crit = createEntityCriteria();
        crit.add(Restrictions.eq("ssoId", sso));
        return (User) crit.uniqueResult();
    }


}

查询功能与实现接口，在这里我们使用Hibernate中的Criteria来创建一个查询

package com.example.service;

import com.example.Entity.User;

/**
 * Created by YanMing on 2017/3/17.
 */
public interface UserService {
    User findById(int id);

    User findBySso(String sso);
}

package com.example.service;

import com.example.Entity.User;
import com.example.dao.UserDao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

/**
 * Created by YanMing on 2017/3/17.
 */
@Service("userService")
@Transactional
public class UserServiceImpl implements UserService{

    @Autowired
    private UserDao dao;

    public User findById(int id) {
        return dao.findById(id);
    }

    public User findBySso(String sso) {
        return dao.findBySSO(sso);
    }

}

用户服务接口与实现

6.接下来我们要是实现SecurityConfig中的CustomUserDetailsService 类，这个类提供事务方法，添加用户权限同时生成UserDetail，用于Security中的configure。

package com.example.service;

/**
 * Created by YanMing on 2017/3/17.
 */
import java.util.ArrayList;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.example.Entity.User;

@Service("customUserDetailsService")
public class CustomUserDetailsService implements UserDetailsService{

    @Autowired
    private UserService userService;

    @Transactional(readOnly=true)
    public UserDetails loadUserByUsername(String ssoId)
            throws UsernameNotFoundException {
        User user = userService.findBySso(ssoId);
        System.out.println("User : "+user);
        if(user==null){
            System.out.println("User not found");
            throw new UsernameNotFoundException("Username not found");
        }
        return new org.springframework.security.core.userdetails.User(user.getSsoId(), user.getPassword(),
                user.getState().equals("Active"), true, true, true, getGrantedAuthorities(user));
    }


    private List<GrantedAuthority> getGrantedAuthorities(User user){
        List<GrantedAuthority> authorities = new ArrayList<GrantedAuthority>();
        authorities.add(new SimpleGrantedAuthority("ROLE_"+user.getUserType()));
        System.out.print("authorities :"+authorities);
        return authorities;
    }

}

7.负责路由的Controller

package com.example.controller;

import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.web.authentication.logout.SecurityContextLogoutHandler;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Created by YanMing on 2017/3/16.
 */
@Controller
public class HelloController {

    @RequestMapping(value = { "/", "/home" }, method = RequestMethod.GET)
    public ModelAndView homePage() {

        ModelAndView model = new ModelAndView();
        model.addObject("currentUser", getPrincipal());
        model.setViewName("welcome");
        return model;
    }

    @RequestMapping(value = "/admin", method = RequestMethod.GET)
    public String adminPage(ModelMap model) {
        model.addAttribute("currentUser", getPrincipal());
        return "admin";
    }

    @RequestMapping(value = "/db", method = RequestMethod.GET)
    public String dbaPage(ModelMap model) {
        model.addAttribute("currentUser", getPrincipal());
        return "dba";
    }

    
    @RequestMapping(value = {"/login"}, method = RequestMethod.GET)
    public ModelAndView loginPage(@RequestParam(value = "error", required = false) String error,
                                  @RequestParam(value = "logout", required = false) String logout){

            ModelAndView model = new ModelAndView();
            if (error != null) {
                model.addObject("error", "Invalid username and password!");
            }

            if (logout != null) {
                model.addObject("msg", "You've been logged out successfully.");
            }
            model.setViewName("logins");
        return model;
    }



    @RequestMapping(value="/logout", method = RequestMethod.GET)
    public String logoutPage (HttpServletRequest request, HttpServletResponse response) {
        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        if (auth != null){
            new SecurityContextLogoutHandler().logout(request, response, auth);
        }
        return "redirect:/login?logout";
    }

    private String getPrincipal(){
        String userName = null;
        Object principal = SecurityContextHolder.getContext().getAuthentication().getPrincipal();

        if (principal instanceof UserDetails) {
            userName = ((UserDetails)principal).getUsername();
        } else {
            userName = principal.toString();
        }
        System.out.println(userName);
        return userName;
    }
}

到此，我们后端部分全部完成，你已经可以使用postman来测试你的项目。这里我提供一个jsp的模板，你的JSP可以均基于此根据Controller传入的参数自行编写。另外数据库也可以根据User自行创建。

Login.jsp

<%--
  Created by IntelliJ IDEA.
  User: YanMing
  Date: 2017/3/16
  Time: 20:36
  To change this template use File | Settings | File Templates.
--%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ page isELIgnored="false" %>
<html>
<head>
    <title>Login Page</title>
    <style>
        .error {
            padding: 15px;
            margin-bottom: 20px;
            border: 1px solid transparent;
            border-radius: 4px;
            color: #a94442;
            background-color: #f2dede;
            border-color: #ebccd1;
            text-align: center;
        }

        .msg {
            padding: 15px;
            margin-bottom: 20px;
            border: 1px solid transparent;
            border-radius: 4px;
            color: #31708f;
            background-color: #d9edf7;
            border-color: #bce8f1;
            text-align: center;
        }

        #login-box {
            width: 300px;
            padding: 20px;
            margin: 100px auto;
            background: #fff;
            -webkit-border-radius: 2px;
            -moz-border-radius: 2px;
            border: 1px solid #000;
        }
    </style>
</head>
<body οnlοad='document.loginForm.username.focus();'>

<h1>Spring Security Login System</h1>
<div>
<div>

    <h2>Login with Username and Password</h2>

    <form name='loginForm'
          action="<c:url value='/login' />" method='POST'>

        <table>
            <tr>
                <td>User:</td>
                <td><input type='text' name='username' value=''></td>
            </tr>
            <tr>
                <td>Password:</td>
                <td><input type='password' name='password' /></td>
            </tr>
            <tr>
                <td colspan='2'>
                    <input name="submit" type="submit" value="submit" />
                </td>
            </tr>
        </table>


    </form>
    <c:if test="${not empty error}">
        <div class="error">${error}</div>
    </c:if>
    <c:if test="${not empty msg}">
        <div class="msg">${msg}</div>
    </c:if>
</div>
</div>


</body>
</html>

User用户欢迎界面：

<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@page session="true"%>
<%@ page isELIgnored="false" %>
<html>
<head>
	<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
	<title>Welcome page</title>
</head>
<body>
	<h2>Dear User:<strong>${currentUser}</strong></h2>
		Welcome to User Page. | <a href="<c:url value="/logout" />">Logout</a>

</body>
</html>

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