步驟：

1.實(shí)現(xiàn)WebMvcConfigurer配置類

2.實(shí)現(xiàn)攔截器 3

. 把攔截器添加到配置中

4.添加需要攔截的請(qǐng)求

5.添加需要排除的請(qǐng)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攔截配置一樣 * @author zp */@Configurationpublic class WebConfigurer implements WebMvcConfigurer { /** * 攔截器配置 * @param registry */ @Override public void addInterceptors(InterceptorRegistry registry) { // addPathPatterns攔截所有請(qǐng)求,excludePathPatterns排除特殊的請(qǐng)求 //registry.addInterceptor(LoginInterceptor()).addPathPatterns('/**'); registry.addInterceptor(AuthorityInterceptor()).addPathPatterns('/**'); //excludePathPatterns 排除的請(qǐng)求// registry.addInterceptor(LoginInterceptor()).addPathPatterns('/**').excludePathPatterns('/user/**');// registry.addInterceptor(AuthorityInterceptor()).addPathPatterns('/**').excludePathPatterns('/user/**'); } /** * 攔截器一 * @return */ @Bean public LoginInterceptor LoginInterceptor() { return new LoginInterceptor(); } /** * 攔截器二 * @return */ @Bean public AuthorityInterceptor AuthorityInterceptor() { return new AuthorityInterceptor(); }}

基于URL實(shí)現(xiàn)的攔截器：

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 { /** * 在請(qǐng)求處理之前進(jìn)行調(diào)用（Controller方法調(diào)用之前） * 基于URL實(shí)現(xiàn)的攔截器 * @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('當(dāng)前請(qǐng)求路徑：'+path); System.out.println('=========進(jìn)入攔截器1==================='); if (path.matches(Const.NO_INTERCEPTOR_PATH)) { //不需要的攔截直接過 System.out.println('=========無需攔截==================='); return true; } else { System.out.println('=========開始攔截==================='); // 這寫你攔截需要干的事兒，比如取緩存，SESSION，權(quán)限判斷等 String token = request.getParameter('token'); if(token == null){System.out.println('=========攔截完成==================='+false);return false; } System.out.println('=========攔截完成==================='+true); return true; } }}

關(guān)鍵代碼：path.matches(Const.NO_INTERCEPTOR_PATH 就是基于正則匹配的url。

package com.zp.springbootdemo.interceptor;/** * @author zp * @explain 常量類 */public class Const { public static final String SUCCESS = 'SUCCESS'; public static final String ERROR = 'ERROR'; public static final String FIALL = 'FIALL'; /**********************對(duì)象和個(gè)體****************************/ public static final String SESSION_USER = 'loginedAgent'; // 用戶對(duì)象 public static final String SESSION_LOGINID = 'sessionLoginID'; // 登錄ID public static final String SESSION_USERID = 'sessionUserID'; // 當(dāng)前用戶對(duì)象ID編號(hào) public static final String SESSION_USERNAME = 'sessionUserName'; // 當(dāng)前用戶對(duì)象ID編號(hào) public static final Integer PAGE = 10; // 默認(rèn)分頁數(shù) public static final String SESSION_URL = 'sessionUrl'; // 被記錄的url public static final String SESSION_SECURITY_CODE = 'sessionVerifyCode'; // 登錄頁驗(yàn)證碼 // 時(shí)間 緩存時(shí)間 public static final int TIMEOUT = 1800;// 秒 public static final String ON_LOGIN = '/logout.htm'; public static final String LOGIN_OUT = '/toLogout'; // 不驗(yàn)證URL anon：不驗(yàn)證/authc：受控制的 public static final String NO_INTERCEPTOR_PATH ='.*/((.css)|(.js)|(images)|(login)|(anon)).*';}

測(cè)試：

請(qǐng)求地址：http://127.0.0.1:8080/user/getUser?token=123

結(jié)果：

基于注解的攔截器

①創(chuàng)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;/** * 在需要登錄驗(yàn)證的Controller的方法上使用此注解 */@Target({ElementType.METHOD})// 可用在方法名上@Retention(RetentionPolicy.RUNTIME)// 運(yùn)行時(shí)有效public @interface LoginRequired {}

②創(chuàng)建攔截器：

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('===============進(jìn)入攔截器2====================='); // 如果不是映射到方法直接通過 if (!(handler instanceof HandlerMethod)) { System.out.println('===============無需攔截====================='); return true; } // ①:START 方法注解級(jí)攔截器 HandlerMethod handlerMethod = (HandlerMethod) handler; Method method = handlerMethod.getMethod(); // 判斷接口是否需要登錄 LoginRequired methodAnnotation = method.getAnnotation(LoginRequired.class); // 有 @LoginRequired 注解，需要認(rèn)證 if (methodAnnotation != null) { // 這寫你攔截需要干的事兒，比如取緩存，SESSION，權(quán)限判斷等 System.out.println('===============開始攔截====================='); String token = request.getParameter('token'); if(token == null){ System.out.println('=========攔截完成==================='+false); return false; } System.out.println('=========攔截完成==================='+true); return true; } System.out.println('===============無需攔截==================='); return true; }}

測(cè)試接口代碼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); }}請(qǐng)求地址：

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

結(jié)果：

測(cè)試接口代碼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); }}

請(qǐng)求地址：

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

結(jié)果：

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