SpringBoot配置拦截器方式实例代码

步骤：

1.实现WebMvcConfigurer配置类

2.实现拦截器 3

. 把拦截器添加到配置中

4.添加需要拦截的请求

5.添加需要排除的请求

package com.zp.springbootdemo.interceptor;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.web.servlet.config.annotation.InterceptorRegistry;import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;/** * 和springmvc的webmvc拦截配置一样 * @author zp */@Configurationpublic class WebConfigurer implements WebMvcConfigurer { /** * 拦截器配置 * @param registry */ @Override public void addInterceptors(InterceptorRegistry registry) { // addPathPatterns拦截所有请求,excludePathPatterns排除特殊的请求 //registry.addInterceptor(LoginInterceptor()).addPathPatterns('/**'); registry.addInterceptor(AuthorityInterceptor()).addPathPatterns('/**'); //excludePathPatterns 排除的请求// registry.addInterceptor(LoginInterceptor()).addPathPatterns('/**').excludePathPatterns('/user/**');// registry.addInterceptor(AuthorityInterceptor()).addPathPatterns('/**').excludePathPatterns('/user/**'); } /** * 拦截器一 * @return */ @Bean public LoginInterceptor LoginInterceptor() { return new LoginInterceptor(); } /** * 拦截器二 * @return */ @Bean public AuthorityInterceptor AuthorityInterceptor() { return new AuthorityInterceptor(); }}

基于URL实现的拦截器：

package com.zp.springbootdemo.interceptor;import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class LoginInterceptor extends HandlerInterceptorAdapter { /** * 在请求处理之前进行调用（Controller方法调用之前） * 基于URL实现的拦截器 * @param request * @param response * @param handler * @return * @throws Exception */ @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { String path = request.getServletPath(); System.out.println('当前请求路径：'+path); System.out.println('=========进入拦截器1==================='); if (path.matches(Const.NO_INTERCEPTOR_PATH)) { //不需要的拦截直接过 System.out.println('=========无需拦截==================='); return true; } else { System.out.println('=========开始拦截==================='); // 这写你拦截需要干的事儿，比如取缓存，SESSION，权限判断等 String token = request.getParameter('token'); if(token == null){System.out.println('=========拦截完成==================='+false);return false; } System.out.println('=========拦截完成==================='+true); return true; } }}

关键代码：path.matches(Const.NO_INTERCEPTOR_PATH 就是基于正则匹配的url。

package com.zp.springbootdemo.interceptor;/** * @author zp * @explain 常量类 */public class Const { public static final String SUCCESS = 'SUCCESS'; public static final String ERROR = 'ERROR'; public static final String FIALL = 'FIALL'; /**********************对象和个体****************************/ public static final String SESSION_USER = 'loginedAgent'; // 用户对象 public static final String SESSION_LOGINID = 'sessionLoginID'; // 登录ID public static final String SESSION_USERID = 'sessionUserID'; // 当前用户对象ID编号 public static final String SESSION_USERNAME = 'sessionUserName'; // 当前用户对象ID编号 public static final Integer PAGE = 10; // 默认分页数 public static final String SESSION_URL = 'sessionUrl'; // 被记录的url public static final String SESSION_SECURITY_CODE = 'sessionVerifyCode'; // 登录页验证码 // 时间 缓存时间 public static final int TIMEOUT = 1800;// 秒 public static final String ON_LOGIN = '/logout.htm'; public static final String LOGIN_OUT = '/toLogout'; // 不验证URL anon：不验证/authc：受控制的 public static final String NO_INTERCEPTOR_PATH ='.*/((.css)|(.js)|(images)|(login)|(anon)).*';}

测试：

请求地址：http://127.0.0.1:8080/user/getUser?token=123

结果：

基于注解的拦截器

①创建注解：

package com.zp.springbootdemo.interceptor;import java.lang.annotation.ElementType;import java.lang.annotation.Retention;import java.lang.annotation.RetentionPolicy;import java.lang.annotation.Target;/** * 在需要登录验证的Controller的方法上使用此注解 */@Target({ElementType.METHOD})// 可用在方法名上@Retention(RetentionPolicy.RUNTIME)// 运行时有效public @interface LoginRequired {}

②创建拦截器：

package com.zp.springbootdemo.interceptor;import org.springframework.web.method.HandlerMethod;import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.lang.reflect.Method;public class AuthorityInterceptor extends HandlerInterceptorAdapter { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { System.out.println('===============进入拦截器2====================='); // 如果不是映射到方法直接通过 if (!(handler instanceof HandlerMethod)) { System.out.println('===============无需拦截====================='); return true; } // ①:START 方法注解级拦截器 HandlerMethod handlerMethod = (HandlerMethod) handler; Method method = handlerMethod.getMethod(); // 判断接口是否需要登录 LoginRequired methodAnnotation = method.getAnnotation(LoginRequired.class); // 有 @LoginRequired 注解，需要认证 if (methodAnnotation != null) { // 这写你拦截需要干的事儿，比如取缓存，SESSION，权限判断等 System.out.println('===============开始拦截====================='); String token = request.getParameter('token'); if(token == null){ System.out.println('=========拦截完成==================='+false); return false; } System.out.println('=========拦截完成==================='+true); return true; } System.out.println('===============无需拦截==================='); return true; }}

测试接口代码1：

package com.zp.springbootdemo.system.controller;import com.zp.springbootdemo.interceptor.LoginRequired;import com.zp.springbootdemo.system.service.UserService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.RestController;import java.util.Map;@RestController@RequestMapping('/user')public class UserController { @Autowired private UserService userService; @GetMapping('/getUser') //@LoginRequired public Map<String,String> getUser(@RequestParam Map<String,String> user){ return userService.getUser(user); }}请求地址：

http://127.0.0.1:8080/user/getUser?token=123

结果：

测试接口代码2：

package com.zp.springbootdemo.system.controller;import com.zp.springbootdemo.interceptor.LoginRequired;import com.zp.springbootdemo.system.service.UserService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.RestController;import java.util.Map;@RestController@RequestMapping('/user')public class UserController { @Autowired private UserService userService; @GetMapping('/getUser') @LoginRequired public Map<String,String> getUser(@RequestParam Map<String,String> user){ return userService.getUser(user); }}

请求地址：

http://127.0.0.1:8080/user/getUser?token=123

结果：

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