java篇-(java使用内嵌Tomcat开发javaWeb项目-高级篇2)

╰+哭是因爲堅強的太久メ 2023-01-19 08:25 30阅读 0赞

### java使用内嵌Tomcat开发javaWeb项目 ###

*  写在前面
 *  集成shiro
 *   *  pom.xml添加shiro相关依赖
     *  在resources目录下面创建spring-shiro.xml
     *  创建shiroRealm，用于用户的授权认证
     *  在spring-shiro.xml添加shiro相关配置
     *  添加shiroFilterFactoryBean对应的filter代理
     *  创建HomeController，用来处理登陆逻辑
     *  创建登陆页面
     *  启动项目
     *  添加权限校验
     *   *  启动项目，通过浏览器访问
 *  集成文件上传
 *   *  pom.xml添加文件上传依赖
     *  在spring-mvc.xml中添加文件上传支持,并配置资源映射
     *  在HomeController里面添加文件上传接口
     *  在sprign-shiro.xml中配置不需要拦截的接口
     *  启动项目，使用postman测试
 *  添加redis订阅功能
 *   *  创建redis message listener
     *  配置RedisMqMessageListener订阅redis消息
     *  启动项目，并使用junit测试发布消息
     *  修改redis默认序列化规则
     *  重新启动项目，发布消息
 *  集成websocket,实现与浏览器长连接通信
 *   *  pom.xml添加websocket依赖
     *  创建websocket handler
     *  配置使用handler
     *  在spring-shiro.xml中开放对应的地址
     *  添加WsContextListener监听器到tomcat，用于初始化websocket环境
     *  启动项目，通过websocket客户端连接
 *  使用redis基于shiro实现session共享
 *   *  pom.xml添加对应依赖
     *  在spring-shiro.xml中配置session共享，缓存相关信息
     *  启动项目，通过浏览器访问，并查看redis中是否存在缓存

# 写在前面 #

`这一篇博客，是在java篇-(java使用内嵌Tomcat开发javaWeb项目-高级篇1)这篇博客之上进行扩展,完成高级篇之后的内容，集成shiro,文件上传服务,redis发布订阅,websocket,shiro session共享`  
`java使用内嵌Tomcat开发javaWeb项目-高级篇1`这篇博客，博客地址: [java篇-(java使用内嵌Tomcat开发javaWeb项目-高级篇1][java_-_java_Tomcat_javaWeb_-_1]

# 集成shiro #

## pom.xml添加shiro相关依赖 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70]

<dependency>
        <groupId>org.apache.shiro</groupId>
        <artifactId>shiro-spring</artifactId>
        <version>${shiro.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aspects</artifactId>
        <version>${spring.version}</version>
    </dependency>

## 在resources目录下面创建spring-shiro.xml ##

`spring-shiro.xml用于存放shiro相关配置`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 1]

## 创建shiroRealm，用于用户的授权认证 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 2]

package com.lhstack.embed.realm;
    
    import com.lhstack.embed.entity.domain.User;
    import com.lhstack.embed.service.IUserService;
    import org.apache.shiro.authc.*;
    import org.apache.shiro.authz.AuthorizationInfo;
    import org.apache.shiro.authz.SimpleAuthorizationInfo;
    import org.apache.shiro.realm.AuthorizingRealm;
    import org.apache.shiro.subject.PrincipalCollection;
    
    import java.util.Optional;
    
    /** * shiro用于进行认真的realm * @author lhstack */
    public class UserRealm extends AuthorizingRealm { 
    
        private IUserService userService;
    
    	public void setUserService(IUserService userService) { 
            this.userService = userService;
        }
    
        @Override
        protected void onInit() { 
            //这里不做密码匹配，通过在doGetAuthenticationInfo手动匹配
            this.setCredentialsMatcher((authenticationToken, authenticationInfo) -> true);
        }
    
        @Override
        protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principal) { 
            User primaryPrincipal = (User) principal.getPrimaryPrincipal();
            SimpleAuthorizationInfo simpleAuthorizationInfo = new SimpleAuthorizationInfo();
            //判断是否是lhstack这个账号，如果是，则赋予超级管理员权限
            if("lhstack".equals(primaryPrincipal.getUsername())){ 
                simpleAuthorizationInfo.addRole("ADMIN");
                simpleAuthorizationInfo.addStringPermission("*:*");
            }else{ 
                simpleAuthorizationInfo.addRole("NORMAL");
                simpleAuthorizationInfo.addStringPermission("normal:*");
            }
            return simpleAuthorizationInfo;
        }
    
        @Override
        protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException { 
            String username = (String) authenticationToken.getPrincipal();
            //UsernamePasswordToken.getCredentials()调用的是getPassword()方法，返回的是char[]数组
            String password = new String((char[]) authenticationToken.getCredentials());
            Optional<User> optionalUser = this.userService.findByUsername(username);
            if(optionalUser.isEmpty()){ 
                throw new UnknownAccountException("用户不存在");
            }
            User user = optionalUser.get();
            if(!user.getPassword().equals(password)){ 
                throw new CredentialsException("用户名密码输入有误");
            }
            return new SimpleAuthenticationInfo(user,"",getName());
        }
    }

在IUserService和UserServiceImpl添加对应方法  
IUserService.java  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 3]

/** * 根据用户名查询用户 * @param username * @return */
        Optional<User> findByUsername(String username);

UserServiceImpl.java  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 4]

@Override
        @Transactional(readOnly = true, propagation = Propagation.SUPPORTS)
        @Cacheable(cacheNames = "user",key = "'findByUsername username:::' + #p0")
        public Optional<User> findByUsername(String username) { 
            return userRepository.findByUsername(username);
        }

## 在spring-shiro.xml添加shiro相关配置 ##

spring-shiro.xml

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
        <bean id="shiroFilterFactoryBean" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
            <property name="securityManager" ref="webSecurityManager"/>
            <property name="loginUrl" value="/login"/>
            <property name="filterChainDefinitionMap">
                <map>
                    <entry key="/login" value="anon"/>
                    <entry key="/static/**" value="anon"/>
                    <entry key="/**" value="authc"/>
                </map>
            </property>
        </bean>
    
        
        <bean class="org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor">
            <property name="securityManager" ref="webSecurityManager"/>
        </bean>
    
    
        
        <bean class="org.apache.shiro.spring.LifecycleBeanPostProcessor"/>
    
        <bean id="userRealm" class="com.lhstack.embed.realm.UserRealm">
            <property name="userService" ref="userServiceImpl"/>
        </bean>
        <aop:aspectj-autoproxy proxy-target-class="true" />
    
        <bean id="webSecurityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
            <property name="sessionManager" ref="sessionManager"/>
            <property name="realm" ref="userRealm"/>
        </bean>
    
        <bean id="sessionManager" class="org.apache.shiro.web.session.mgt.DefaultWebSessionManager">
            
            <property name="sessionIdUrlRewritingEnabled" value="false"/>
        </bean>
    
    </beans>

## 添加shiroFilterFactoryBean对应的filter代理 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 5]

private static void addShiroFilter(Context context) { 
            DelegatingFilterProxy filterProxy = new DelegatingFilterProxy();
            filterProxy.setTargetFilterLifecycle(true);
            FilterDef filterDef = new FilterDef();
            //这里与shiroFilterFactoryBean的id必须一致
            filterDef.setFilterName("shiroFilterFactoryBean");
    
            filterDef.setFilter(filterProxy);
    
            //定义filter映射
            FilterMap filterMap = new FilterMap();
            filterMap.setFilterName("shiroFilterFactoryBean");
            filterMap.addURLPattern("/*");
            //添加filter
            context.addFilterDef(filterDef);
            context.addFilterMap(filterMap);
        }

## 创建HomeController，用来处理登陆逻辑 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 6]  
HomeController.java

package com.lhstack.embed.controller;
    
    import com.lhstack.embed.entity.domain.User;
    import org.apache.shiro.SecurityUtils;
    import org.apache.shiro.authc.UsernamePasswordToken;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.PostMapping;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    /** * @author lhstack */
    @Controller
    @RequestMapping
    public class HomeController { 
    
    
        /** * 转发到login.html页面 * @return */
        @GetMapping("login")
        public String toLogin(){ 
            return "login";
        }
    
        /** * 登陆逻辑 * @param user * @return */
        @PostMapping("login")
        public String login(User user){ 
            SecurityUtils.getSubject().login(new UsernamePasswordToken(user.getUsername(),user.getPassword()));
            return "redirect:/thymeleaf/index";
        }
    }

## 创建登陆页面 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 7]

<!DOCTYPE html>
    <html lang="en" xmlns:th="https://www.thymeleaf.org/">
    <head>
        <meta charset="UTF-8">
        <title>login</title>
    </head>
    <body>
    <form th:action="${#request.contextPath} + '/login'" method="post">
        <div>
            <label for="username">用户名</label>
            <input name="username" id="username" />
        </div>
        <div>
            <label for="password">密码</label>
            <input name="password" id="password" />
        </div>
        <div>
            <input type="submit" value="登陆" /><input type="reset" value="重置" />
        </div>
    </form>
    </body>
    </html>

## 启动项目 ##

通过浏览器访问 localhost:8080，然后没有登陆，就自动重定向到登陆页面  
![在这里插入图片描述][20210509113953360.png]  
输入错误的用户,点击登陆  
![在这里插入图片描述][20210509114012686.png]  
![在这里插入图片描述][20210509114037157.png]

输入正确的用户和错误的密码,点击登陆  
![在这里插入图片描述][20210509114103339.png]  
![在这里插入图片描述][20210509114114294.png]  
输入正确的用户名和密码,点击登陆  
![在这里插入图片描述][20210509114135739.png]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 8]

## 添加权限校验 ##

删除之前创建的IndexController.kt(`不知道为什么，这里开启aop支持之后，kt里面注入的对象会出现空指针异常`)文件，创建IndexController.java  
在IndexController添加对应的权限校验注解  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 9]

IndexController.java

package com.lhstack.embed.controller;
    
    import com.lhstack.embed.entity.domain.User;
    import com.lhstack.embed.service.IUserService;
    import org.apache.shiro.authz.annotation.RequiresPermissions;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.web.bind.annotation.*;
    
    import java.util.*;
    
    @Controller
    @RequestMapping("thymeleaf")
    public class IndexController { 
    
        @Autowired
        private IUserService userService;
    
    
        @GetMapping("index")
        @RequiresPermissions("normal:list")
        public String index(
                Model model,
                @RequestParam(name = "page", defaultValue = "1") Integer page,
                @RequestParam(name = "size", defaultValue = "10") Integer size) { 
            model.addAttribute("list", this.userService.queryPageList(page, size));
            return "index";
        }
    
    
        /** * 跳转更新页面 */
        @GetMapping("toUpdatePage/{id}")
        @RequiresPermissions("admin:toUpdate")
        public String toUpdatePage(Model model, @PathVariable("id")Integer id) { 
            User user = this.userService.findById(id);
            if (Objects.isNull(user)) { 
                return "redirect:/thymeleaf/index";
            }
            model.addAttribute("user", user);
            return "update";
        }
    
        @PostMapping("update/{id}")
        @RequiresPermissions("admin:update")
        public String update(User user,@PathVariable("id")Integer id){ 
            this.userService.update(id, user);
            return "redirect:/thymeleaf/index";
        }
    
        /** * 跳转保存页面 */
        @GetMapping("toSave")
        @RequiresPermissions("admin:toSave")
        public String toSavePage(){ 
            return "save";
        }
    
        @PostMapping("save")
        @RequiresPermissions("admin:save")
        public String save(User user){ 
            this.userService.save(user);
            return "redirect:/thymeleaf/index";
        }
    
        @GetMapping("del/{id}")
        @RequiresPermissions("admin:del")
        public String delete(@PathVariable("id")Integer id){ 
            this.userService.deleteById(id);
            return "redirect:/thymeleaf/index";
        }
    }

### 启动项目，通过浏览器访问 ###

登陆aaa账号  
![在这里插入图片描述][20210509114503433.png]

可以查看列表  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 10]  
点击新增，更新和删除  
![在这里插入图片描述][20210509122131304.png]  
![在这里插入图片描述][20210509122138162.png]  
![在这里插入图片描述][20210509122145875.png]  
登陆lhstack账号  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 11]  
点击新增，添加用户  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 12]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 13]  
点击更新  
![在这里插入图片描述][20210509122257927.png]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 14]  
点击删除  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 15]  
![在这里插入图片描述][20210509122321609.png]

# 集成文件上传 #

## pom.xml添加文件上传依赖 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 16]

<dependency>
                <groupId>commons-fileupload</groupId>
                <artifactId>commons-fileupload</artifactId>
                <version>${commons-fileupload.version}</version>
            </dependency>

## 在spring-mvc.xml中添加文件上传支持,并配置资源映射 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 17]

## 在HomeController里面添加文件上传接口 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 18]

@Value("${user.dir}/files")
        private String fileStorePath;
        
        @PostMapping("upload")
        public String upload(@RequestParam("file") MultipartFile file) throws IOException { 
            File director = new File(fileStorePath);
            if(!director.exists()){ 
                director.mkdirs();
            }
            file.transferTo(new File(director,file.getOriginalFilename()));
            return "redirect:http://localhost:8080/resources/" + file.getOriginalFilename();
        }

## 在sprign-shiro.xml中配置不需要拦截的接口 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 19]

## 启动项目，使用postman测试 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 20]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 21]

# 添加redis订阅功能 #

## 创建redis message listener ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 22]

package com.lhstack.embed.listener;
    
    import org.springframework.data.redis.listener.adapter.MessageListenerAdapter;
    
    /** * @author lhstack */
    public class RedisMqMessageListener extends MessageListenerAdapter { 
    
    
        public RedisMqMessageListener() { 
            super.setDefaultListenerMethod("message");
        }
    
        public void message(String message){ 
            System.out.println("收到redis mq message: " + message);
        }
    
    }

## 配置RedisMqMessageListener订阅redis消息 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 23]

## 启动项目，并使用junit测试发布消息 ##

消息成功发布并且收到了  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 24]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 25]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 26]

## 修改redis默认序列化规则 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 27]

<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
            <property name="connectionFactory" ref="redisConnectionFactory"/>
            <property name="enableDefaultSerializer" value="true"/>
            <property name="defaultSerializer">
                <bean class="org.springframework.data.redis.serializer.StringRedisSerializer" />
            </property>
        </bean>

## 重新启动项目，发布消息 ##

可以看到，已经没有乱码了  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 28]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 29]

# 集成websocket,实现与浏览器长连接通信 #

## pom.xml添加websocket依赖 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 30]

<dependency>
                <groupId>org.apache.tomcat.embed</groupId>
                <artifactId>tomcat-embed-websocket</artifactId>
                <version>${tomcat.embed.version}</version>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-websocket</artifactId>
                <version>${spring.version}</version>
            </dependency>

## 创建websocket handler ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 31]

package com.lhstack.embed.handler.ws;
    
    import org.springframework.web.socket.TextMessage;
    import org.springframework.web.socket.WebSocketSession;
    import org.springframework.web.socket.handler.AbstractWebSocketHandler;
    
    /** * @author lhstack */
    public class TestMessageHandler extends AbstractWebSocketHandler { 
    
        @Override
        protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception { 
            System.out.printf("收到客户端: %s,message: %s%n",session.getRemoteAddress(),message.getPayload());
            session.sendMessage(new TextMessage("我是服务端，我收到你的消息了"));
        }
    
        @Override
        public void afterConnectionEstablished(WebSocketSession session) throws Exception { 
            System.out.printf("client: %s,连接进来了%n",session.getRemoteAddress());
        }
    }

## 配置使用handler ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 32]

spring-mvc.xml

<?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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:ws="http://www.springframework.org/schema/websocket" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/websocket http://www.springframework.org/schema/websocket/spring-websocket.xsd">
        
        <bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean">
            <property name="providerClass" value="org.hibernate.validator.HibernateValidator"/>
        </bean>
    
        
        <mvc:annotation-driven validator="validator">
            <mvc:message-converters>
                <bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
                    <property name="defaultCharset" value="UTF-8"/>
                    <property name="fastJsonConfig">
                        <bean class="com.alibaba.fastjson.support.config.FastJsonConfig">
                            <property name="charset" value="UTF-8"/>
                            <property name="dateFormat" value="yyyy-MM-dd HH:mm:ss"/>
                            <property name="writeContentLength" value="true"/>
                        </bean>
                    </property>
                    <property name="supportedMediaTypes">
                        <array>
                            <value>application/json</value>
                            <value>application/json;charset=utf-8</value>
                        </array>
                    </property>
                </bean>
            </mvc:message-converters>
        </mvc:annotation-driven>
    
        <bean id="testMessageHandler" class="com.lhstack.embed.handler.ws.TestMessageHandler"/>
    
        <ws:handlers allowed-origins="*" allowed-origin-patterns="*">
            <ws:mapping path="/ws/test" handler="testMessageHandler"/>
        </ws:handlers>
    
        <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
            <property name="defaultEncoding" value="UTF-8"/>
            <property name="maxUploadSize" value="#{1024 * 1024 * 5}"/>
            <property name="maxUploadSizePerFile" value="#{1024 * 1024 * 5}"/>
        </bean>
        
        <mvc:resources mapping="/static/**" location="classpath:/static/"/>
        <mvc:resources mapping="/resources/**" location="file:${user.dir}/files/"/>
        <context:component-scan base-package="com.lhstack.embed.controller"/>
    </beans>

## 在spring-shiro.xml中开放对应的地址 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 33]

## 添加WsContextListener监听器到tomcat，用于初始化websocket环境 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 34]

## 启动项目，通过websocket客户端连接 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 35]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 36]  
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# 使用redis基于shiro实现session共享 #

`session共享是分布式数据一致性的一种解决方案，当应用通过集群部署在不同机器上面 时，需要保证每台机器上的用户信息一致，这里就出现了一个分布式session的概念，通过中间件，将用户的session统一维护，而用户通过sessionId获取信息的时候，就直接去中间件里面获取，就能保证用户在请求的时候，不管是到集群里面那一台机器，都能正确的获取用户相关信息`

## pom.xml添加对应依赖 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 38]

<dependency>
                <groupId>org.crazycake</groupId>
                <artifactId>shiro-redis</artifactId>
                <version>${shiro-redis.version}</version>
            </dependency>

## 在spring-shiro.xml中配置session共享，缓存相关信息 ##

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spring-shiro.xml

<?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:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
        <bean id="shiroFilterFactoryBean" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
            <property name="securityManager" ref="webSecurityManager"/>
            <property name="loginUrl" value="/login"/>
            <property name="filterChainDefinitionMap">
                <map>
                    <entry key="/login" value="anon"/>
                    <entry key="/resources/**" value="anon"/>
                    <entry key="/upload" value="anon"/>
                    <entry key="/static/**" value="anon"/>
                    <entry key="/ws/test" value="anon"/>
                    <entry key="/**" value="authc"/>
                </map>
            </property>
        </bean>
    
        
        <bean class="org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor">
            <property name="securityManager" ref="webSecurityManager"/>
        </bean>
    
        <aop:aspectj-autoproxy proxy-target-class="false" expose-proxy="false"/>
    
        
        <bean class="org.apache.shiro.spring.LifecycleBeanPostProcessor"/>
    
        <bean id="userRealm" class="com.lhstack.embed.realm.UserRealm">
            <property name="userService" ref="userServiceImpl"/>
        </bean>
    
        <bean id="webSecurityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
            <property name="sessionManager" ref="sessionManager"/>
            <property name="realm" ref="userRealm"/>
            <property name="cacheManager" ref="redisCacheManager" />
        </bean>
    
    
        <bean id="sessionManager" class="org.apache.shiro.web.session.mgt.DefaultWebSessionManager">
            
            <property name="sessionIdUrlRewritingEnabled" value="false"/>
            <property name="sessionDAO" ref="sessionDAO"/>
        </bean>
    
        
        <bean id="redisCacheManager" class="org.crazycake.shiro.RedisCacheManager">
            <property name="redisManager" ref="redisManager"/>
            <property name="keyPrefix" value="shiro-cache" />
        </bean>
        <bean id="sessionDAO" class="org.crazycake.shiro.RedisSessionDAO">
            <property name="keyPrefix" value="shiro-session"/>
            <property name="redisManager" ref="redisManager" />
        </bean>
    
        <bean id="redisManager" class="org.crazycake.shiro.RedisManager">
            <property name="database" value="#{${redis.database} + 1}" />
            <property name="host" value="${redis.host}:${redis.port}" />
        </bean>
    
    </beans>

## 启动项目，通过浏览器访问，并查看redis中是否存在缓存 ##

访问页面,不登陆  
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session已经创建出来了  
![在这里插入图片描述][20210509150510772.png]  
登陆  
![在这里插入图片描述][2021050915053356.png]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNDEzMDEx_size_16_color_FFFFFF_t_70 41]  
cache也进来了  
![在这里插入图片描述][2021050915055064.png]  
过期时间也是有设置的，同时缓存的默认过期时间是1800s，可以在RedisCacheManager里面设置  
session的过期时间跟随session过期时间而设置  
![在这里插入图片描述][2021050915064188.png]

[java_-_java_Tomcat_javaWeb_-_1]: https://blog.csdn.net/qq_42413011/article/details/116545945
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