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這篇文章主要為大家展示了“SpringBoot2中多個攔截器配置和使用場景的示例分析”,內容簡而易懂,條理清晰,希望能夠幫助大家解決疑惑,下面讓小編帶領大家一起研究并學習一下“SpringBoot2中多個攔截器配置和使用場景的示例分析”這篇文章吧。
攔截器,請求的接口被訪問之前,進行攔截然后在之前或之后加入某些操作。攔截是AOP的一種實現策略。 攔截器主要用來按照指定規則拒絕請求。
Token令牌驗證 請求數據校驗 用戶權限校驗 放行指定接口
自定義類實現HandlerInterceptor接口
1)OneInterceptor 攔截器
import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * 攔截器一 */ public class OneInterceptor implements HandlerInterceptor { private static final Logger LOGGER = LoggerFactory.getLogger(OneInterceptor.class.getName()); @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) throws Exception { String url =String.valueOf(request.getRequestURL()) ; LOGGER.info("1、url=="+url); // 放開攔截 return true; } @Override public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception { LOGGER.info("1、postHandle"); } @Override public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception { LOGGER.info("1、afterCompletion"); } }
2)TwoInterceptor 攔截器
import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * 攔截器二 */ public class TwoInterceptor implements HandlerInterceptor { private static final Logger LOGGER = LoggerFactory.getLogger(TwoInterceptor.class.getName()); @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) throws Exception { String url =String.valueOf(request.getRequestURL()) ; LOGGER.info("2、url=="+url); // 放開攔截 return true; } @Override public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception { LOGGER.info("2、postHandle"); } @Override public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception { LOGGER.info("2、afterCompletion"); } }
import com.boot.intercept.intercept.OneInterceptor; import com.boot.intercept.intercept.TwoInterceptor; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurer; /** * Web配置文件 */ @Configuration public class WebMvcConfig implements WebMvcConfigurer { public void addInterceptors(InterceptorRegistry registry) { // 攔截所有路徑 // 注冊自定義兩個攔截器 registry.addInterceptor(new OneInterceptor()).addPathPatterns("/**"); registry.addInterceptor(new TwoInterceptor()).addPathPatterns("/**"); } }
import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @RestController public class InterceptController { @RequestMapping("/reqUrl") public String reqUrl (){ return "success" ; } }
日志輸出內容如下
intercept.OneInterceptor : 1、url==http://127.0.0.1:8005/reqUrl intercept.TwoInterceptor : 2、url==http://127.0.0.1:8005/reqUrl intercept.TwoInterceptor : 2、postHandle intercept.OneInterceptor : 1、postHandle intercept.TwoInterceptor : 2、afterCompletion intercept.OneInterceptor : 1、afterCompletionla
攔截器的攔截順序,是按照Web配置文件中注入攔截器的順序執行的。
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