springboot拦截器，过滤器完成请求参数的获取

1.自定义拦截器

package ;

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import org.;
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/**
 * Description: 请求拦截器
 *
 * @version 1.0 @ClassName RequestInterceptor @Author xulei
 * @date 2021/3/2 17:42
 */
@Component
@Order(1)
public class RequestInterceptor implements HandlerInterceptor {
  private final Logger logger = ();
  private static final String GET_METHOD = "GET";
  private static final String POST_METHOD = "POST";
  @Autowired private IModelService iModelService;

  @Override
  public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
      throws Exception {
    (
        "请求方式===={},请求uri===={},response==={},拦截的方法==={}",
        (),
        (),
        response,
        ((HandlerMethod) handler).getMethod().getName());
    CheckNamespaceLegalParam checkNamespaceLegalParam = new CheckNamespaceLegalParam();
    (("Authorization"));
    (());
    if (().toUpperCase().equals(GET_METHOD)) {
      // (("Authorization"));
      (("namespace"));
    }
    if (().toUpperCase().equals(POST_METHOD)) {
      byte[] bodyBytes = (());
      String body = new String(bodyBytes, ());
      (
          (body, ).get("namespace").toString());
      ("请求体：{}", body);
    }
    return (checkNamespaceLegalParam);
  }
}

2.由于post请求参数在body中获取，request中的资源只能获取一次，进而要将body保存下来，重写HttpServletRequestWrapper

 

package ;

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import org.;
import org.;
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/**
 * Description: 解决请求拦截器获取body参数请求放过后报错问题Required request body is missing
 *
 * @version 1.0 @ClassName CustomHttpServletRequestWrapper @Author xulei
 * @date 2021/3/3 15:46
 */
// @Component
public class CustomHttpServletRequestWrapper extends HttpServletRequestWrapper {
  private final Logger logger = ();
  /** 缓存下来的HTTP body */
  private byte[] body;

  public CustomHttpServletRequestWrapper(HttpServletRequest request) throws IOException {
    super(request);
    body = (());
  }

  @Override
  public ServletInputStream getInputStream() throws IOException {
    if (body == null) {
      body = new byte[0];
    }

    InputStream bodyStream = new ByteArrayInputStream(body);

    return new ServletInputStream() {

      @Override
      public int read() throws IOException {
        return ();
      }

      @Override
      public boolean isFinished() {
        return false;
      }

      @Override
      public boolean isReady() {
        return false;
      }

      @Override
      public void setReadListener(ReadListener readListener) {}
    };
  }
  // 对外提供读取流的方法
  @Override
  public BufferedReader getReader() throws IOException {
    // InputStream bodyStream = new ByteArrayInputStream(body);
    return new BufferedReader(new InputStreamReader(getInputStream()));
  }
}

 

3.自定义过滤器，并且注册进springboot

 

package ;

import ;
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/**
 * Description: 过滤器
 *
 * @version 1.0 @ClassName WebFilter @Author xulei
 * @date 2021/3/3 16:42
 */
@Order(-1)
@(filterName = "webFilter", urlPatterns = "/*")
@Component
public class WebFilter implements Filter {

  @Override
  public void init(FilterConfig filterConfig) throws ServletException {}

  @Override
  public void doFilter(
      ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain)
      throws IOException, ServletException {
    ServletRequest request = null;
    if (servletRequest instanceof HttpServletRequest) {
      request = new CustomHttpServletRequestWrapper((HttpServletRequest) servletRequest);
    }
    if (request == null) {
      (servletRequest, servletResponse);
    } else {
      (request, servletResponse);
    }
  }

  @Override
  public void destroy() {}
}

 

package ;

import ;
import ;
import ;
import ;

/**
 * Description: 过滤器配置
 *
 * @version 1.0 @ClassName FilterConfiguration @Author xulei
 * @date 2021/3/3 16:51
 */
@Configuration
public class FilterConfiguration {

  @Bean
  FilterRegistrationBean<WebFilter> myFilterFilterRegistrationBean() {
    FilterRegistrationBean<WebFilter> bean = new FilterRegistrationBean<>();
    (new WebFilter());
    (-1);
    (("/*"));
    return bean;
  }
}

 

4.重写mvc放过静态资源

 

@Configuration
public class WebMvcConfig implements WebMvcConfigurer {

  private final Logger logger = ();
  @Autowired private RequestInterceptor requestInterceptor;

  @Override
  public void addInterceptors(InterceptorRegistry registry) {
    ("############进入请求拦截器##########");
    registry
        .addInterceptor(requestInterceptor)
        .addPathPatterns("/**")
        .excludePathPatterns("/swagger-resources/**", "/**.html");
  }

}