目录 添加pom.xml 创建简单的测试接口 使用过滤器实现 使用拦截器实现 需求:只有用户登录成功后,才能访问其它接口,否则提示需要进行登录 项目仓库地址:https://gitee.com/aiw-nine/sp
目录
- 添加pom.xml
- 创建简单的测试接口
- 使用过滤器实现
- 使用拦截器实现
需求:只有用户登录成功后,才能访问其它接口,否则提示需要进行登录
项目仓库地址:https://gitee.com/aiw-nine/springboot_session_verify
添加pom.xml
新建Spring Boot(2.7.2)项目,添加如下依赖:
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.7.2</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.aiw</groupId> <artifactId>waimai</artifactId> <version>0.0.1-SNAPSHOT</version> <name>waimai</name> <description>waimai</description> <properties> <java.version>17</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.76</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <excludes> <exclude> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </exclude> </excludes> </configuration> </plugin> </plugins> </build> </project>
创建简单的测试接口
package com.aiw.springboot_session_verify.controller; import com.aiw.springboot_session_verify.entity.User; import com.aiw.springboot_session_verify.response.R; import org.springframework.web.bind.annotation.RequestBody; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RestController; import javax.servlet.http.HttpServletRequest; import java.util.Objects; @RestController @RequestMapping("/user") public class UserController { /** * 登录,此处只做简单测试 * * @param user * @param request * @return */ @RequestMapping(value = "/login", method = RequestMethod.POST) public R<User> login(@RequestBody User user, HttpServletRequest request) { // 此处应该和数据库进行交互判断,为做测试,简单写死 if (Objects.equals(user.getId(), 1) && Objects.equals(user.getName(), "Aiw")) { // 登录成功,将id存入session并返回登录成功结果 request.getSession().setAttribute("user", user.getId()); request.getSession().setMaxInactiveInterval(1800); // 设置session失效时间为30分钟 return R.success("登录成功", user); } return R.fail("登录失败"); } /** * 退出登录 * * @param request * @return */ @RequestMapping(value = "/logout", method = RequestMethod.POST) public R<String> logout(HttpServletRequest request) { request.getSession().removeAttribute("user"); return R.success("退出成功"); } /** * 此处做测试,看用户在未登录时,能否访问到此接口 * * @return */ @RequestMapping(value = "/index", method = RequestMethod.GET) public R<String> index() { return R.success("首页,访问成功"); } }
使用过滤器实现
创建LoginCheckFilter.java
类,实现Filter
接口
package com.aiw.springboot_session_verify.filter; import com.aiw.springboot_session_verify.response.R; import com.alibaba.fastjson.JSON; import lombok.extern.slf4j.Slf4j; import org.springframework.util.AntPathMatcher; import javax.servlet.*; import javax.servlet.annotation.WebFilter; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.util.Objects; /** * 检查用户是否已经完成登录(方式一:过滤器) * 需要在启动类上加上@ServletComponentScan注解,这样才会扫描@WebFilter注解 */ @Slf4j @WebFilter public class LoginCheckFilter implements Filter { // 路径匹配器,支持通配符 public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher(); @Override public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { HttpServletRequest request = (HttpServletRequest) servletRequest; HttpServletResponse response = (HttpServletResponse) servletResponse; log.info("拦截到的请求:{}", request.getRequestURI()); // 1、获取本次请求的URI String requestURI = request.getRequestURI(); // 定义不需要处理的请求路径 String[] urls = new String[]{"/user/login", "/user/logout"}; // 2、判断本次请求是否需要处理 boolean check = check(urls, requestURI); // 3、如果不需要处理,则直接放行 if (check) { log.info("本次请求{}不需要处理", requestURI); filterChain.doFilter(request, response); return; } // 4、判断登录状态,如果已登录,则直接放行 if (Objects.nonNull(request.getSession().getAttribute("user"))) { log.info("用户已登录,用户id为:{}", request.getSession().getAttribute("user")); filterChain.doFilter(request, response); return; } // 5、如果未登录则返回未登录结果,通过输出流方式向客户端页面响应数据 log.info("用户未登录"); response.setContentType("application/json; charset=utf-8"); // 1、使用Fastjson(默认过滤null值) response.getWriter().write(JSON.toJSONString(R.error("未登录"))); // 2、使用默认的Jackson,此处关于Jackson配置的相关属性会失效(即若在配置文件中配置过滤null值,这里返回时不会过滤) // response.getWriter().write(new ObjectMapper().writeValueAsString(R.error("未登录"))); return; } /** * 路径匹配,检查本次请求是否需要放行 * * @param urls * @param requestURI * @return */ public boolean check(String[] urls, String requestURI) { for (String url : urls) { boolean match = PATH_MATCHER.match(url, requestURI); if (match) return true; } return false; } }
修改启动类
package com.aiw.springboot_session_verify; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.web.servlet.ServletComponentScan; @ServletComponentScan @SpringBootApplication public class SpringbootSessionVerifyApplication { public static void main(String[] args) { SpringApplication.run(SpringbootSessionVerifyApplication.class, args); } }
启动项目,使用ApiPost进行接口测试。首先在未登录状态下,访问/user/index
接口
可以看到在未登录时,访问其它接口会失败
此时先进行登录,访问/user/login
接口
再次访问/user/index
接口
即登录成功后,可以成功访问该接口;为保证后续操作,此处再访问/user/logout
接口,删除后端的session
使用拦截器实现
创建LoginCheckInterceptor.java
类,实现HandlerInterceptor
接口
package com.aiw.springboot_session_verify.interceptor; import com.aiw.springboot_session_verify.response.R; import com.alibaba.fastjson.JSON; import lombok.extern.slf4j.Slf4j; import org.springframework.web.servlet.HandlerInterceptor; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import java.util.Objects; /** * 检查用户是否已经完成登录(方式二:拦截器) * 需要在实现WebMvcConfigurer接口的配置类中重写addInterceptors方法,将拦截器注册到容器,并指定拦截规则 */ @Slf4j public class LoginCheckInterceptor implements HandlerInterceptor { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { //1.获取请求 log.info("拦截的请求:{}", request.getRequestURI()); //2.判断用户是否登录 HttpSession session = request.getSession(); // 若存在,则放行 if (Objects.nonNull(session.getAttribute("user"))) return true; //拦截住,并给前端页面返回未登录信息,以输出流的方式,json格式返回 response.setContentType("application/json; charset=utf-8"); // 1、使用Fastjson(默认过滤null值) response.getWriter().write(JSON.toJSONString(R.error("未登录"))); // 2、使用默认的Jackson,在配置文件中关于Jackson配置的相关属性会失效 //response.getWriter().write(new ObjectMapper().writeValueAsString(R.error("未登录"))); return false; } }
注册拦截器,新建配置类WebConfig.java
,实现WebMvcConfigurer
接口
package com.aiw.springboot_session_verify.config; import com.aiw.springboot_session_verify.interceptor.LoginCheckInterceptor; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurer; @Configuration public class WebConfig implements WebMvcConfigurer { /** * 注册拦截器 * * @param registry */ @Override public void addInterceptors(InterceptorRegistry registry) { registry.addInterceptor(new LoginCheckInterceptor()) .addPathPatterns("/**") // 排除的请求路径 .excludePathPatterns("/user/login", "/user/logout"); } }
注释掉LoginCheckFilter.java
类,再注释掉启动类上的@ServletComponentScan
注解,防止过滤器的干扰,启动项目。首先在未登录状态下,访问/user/index
接口
进行登录,访问/user/login
接口
再次访问/user/index
接口
至此,全部完成,当然后期可以使用Spring Boot+JWT实现接口验证
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