springboot的拦截器和过滤器实现，
说明：和springmvc一样去实现HandlerInterceptor接口
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import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* 〈一句话功能简述〉<br>
* TODO(参数拦截器1)
*
* @author sunhan
* @version 1.0.0
* @since 2020/3/7 10:06 PM
*/
@Component
public class ParameterInterceptor1
implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
Object handler) throws Exception {
System.out.println("进入了拦截器-----11111"
);
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response,
Object handler, ModelAndView modelAndView) {
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response,
Object handler, Exception ex) {
}
}
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把自定义拦截器注册到WebMvcConfigurer配置接口中：
重写addInterceptors方法，添加自定义拦截器的order，pathPatterns
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import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
/**
* 〈一句话功能简述〉<br>
* TODO()
*
* @author sunhan
* @version 1.0.0
* @since 2020/3/7 10:25 PM
*/
@Configuration
public class InterceptConfiguration
implements WebMvcConfigurer {
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(new ParameterInterceptor1()).addPathPatterns("/get*"
);
registry.addInterceptor(new ParameterInterceptor2()).addPathPatterns("/save*"
);
}
}
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说明：注解方式和注册方式
1、注解方式：
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import org.springframework.core.annotation.Order;
import javax.servlet.*
;
import javax.servlet.annotation.WebFilter;
import java.io.IOException;
/**
* 〈一句话功能简述〉<br>
* TODO()
*
* @author sunhan
* @version 1.0.0
* @since 2020/3/6 5:28 PM
*/
@WebFilter(filterName = "requestParamFilter",urlPatterns = "/*"
)
@Order(3
)
public class RequestParamFilter
implements Filter {
@Override
public void init(FilterConfig filterConfig)
throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse,
FilterChain filterChain) throws IOException, ServletException {
System.out.println("sunhan---请求参数过滤器！---test1"
);
filterChain.doFilter(servletRequest,servletResponse);
}
@Override
public void destroy() {
}
}
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注意：
1.1、注解方式需要@WebFilter和@Order放在Filter实现类上。
1.2、注解方式需要@ServletComponentScan放在SpringBootApplication启动类上
2、注册方式：
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import javax.servlet.*
;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
public class MyFilter
implements Filter {
@Override
public void init(FilterConfig arg0)
throws ServletException {
}
@Override
public void doFilter(ServletRequest srequest, ServletResponse sresponse, FilterChain filterChain)
throws IOException, ServletException {
HttpServletRequest request =
(HttpServletRequest) srequest;
System.out.println("this is MyFilter,url :"+
request.getRequestURI());
filterChain.doFilter(srequest, sresponse);
}
@Override
public void destroy() {
}
}
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注意：@Bean放在一个方法中，然后通过springboot的FilterRegistrationBean注册到过滤链中
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import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class WebConfiguration {
@Bean
public FilterRegistrationBean testFilterRegistration() {
FilterRegistrationBean registration =
new FilterRegistrationBean();
registration.setFilter(new MyFilter());
registration.addUrlPatterns("/*"
);
registration.setName("MyFilter"
);
registration.setOrder(6
);
return registration;
}
@Bean
public FilterRegistrationBean test2FilterRegistration() {
FilterRegistrationBean registration =
new FilterRegistrationBean();
registration.setFilter(new MyFilter2());
registration.addUrlPatterns("/*"
);
registration.setName("MyFilter2"
);
registration.setOrder(1
);
return registration;
}
}
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