Spring boot 拦截器

拦截器写法：
1.定义拦截器
2.注册拦截器
3.conf加入扫描

1.定义拦截器
其实呢就是实现下面这个接口啦~ 不过有封装好的抽象类 那就用喽 AsyncHandlerInterceptor

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang3.StringUtils;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import com.baidu.bce.plat.webframework.exception.BceException;

import lombok.extern.slf4j.Slf4j;

@Slf4j
@Component
public class AuthInterceptor extends HandlerInterceptorAdapter {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
log.debug("[CHECK internal AUTH AOP] begin");
checkSign(request);
setUserId(request);
log.debug("[CHECK internal AUTH AOP] end");
return true;
}

@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler,
Exception ex) throws Exception {
UserIdHolder.removeAuthorizedUserId();
}

private void checkSign(HttpServletRequest request) {
// 做写业务
}

private void setUserId(HttpServletRequest request) {
String userId = request.getHeader("user_id"); // 看你的需求

UserIdHolder.setAuthorizedUserId(userId);  // 这个是ThreadLocal
}
}

2.注册import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import lombok.extern.slf4j.Slf4j;

@Configuration
@ConditionalOnWebApplication
@ConditionalOnExpression("${auth.enable:false}")
@Slf4j
public class InternalAuthConfig {
@Configuration
public static class InternalAuthInterceptorConfigureAdapter extends WebMvcConfigurerAdapter {
@Value("${auth.interceptor.path:/**}")
private String path;

@Value("${auth.interceptor.exclude.path:}")
private String excludePath;

@Override
public void addInterceptors(InterceptorRegistry registry) {
log.info("add AuthInterceptorAdapter");
AuthInterceptor interceptor = new AuthInterceptor();
registry.addInterceptor(interceptor)
.addPathPatterns(path)
.excludePathPatterns(excludePath.split(";"));
}
}
}

3.加入spring.factoriesorg.springframework.boot.autoconfigure.EnableAutoConfiguration=\
com.test.auth.AuthConfig路径类似于这个：



maven依赖
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<optional>true</optional>
</dependency>