java - 将 HandlerInterceptor 迁移到 Spring boot 2.6

Question

我为 Spring 2.4 实现了这个旧代码

public class Interceptor extends HandlerInterceptorAdapter {

  @Override
  public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
      Object handler) throws Exception {
    ........
    return super.preHandle(request, response, handler);
  }
}

我将代码迁移到 Spring 2.6:

public class Interceptor implements HandlerInterceptor {

  @Override
  public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
      Object handler) throws Exception {
    ......................
    return HandlerInterceptor.super.preHandle(request, response, handler);
  }
}

我得到了 Cannot resolve method 'preHandle' in 'Object' 所以我将代码更改为 HandlerInterceptor.super.preHandle(request, response, handler);

这样编辑代码是否正确:HandlerInterceptor.super.preHandle(request, response, handler); 还是应该以其他方式编辑？

Answer 1

应该是

public class Interceptor implements HandlerInterceptor {

  @Override
  public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
      Object handler) throws Exception {
    ......................
    return true;
  }
}

请注意，该方法返回一个 boolean 值。它告诉 Spring 进一步处理请求 (true) 或不 (false)。

HandlerInterceptor 中 preHandle() 的默认实现仅返回 true ( https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/servlet/HandlerInterceptor.html#preHandle-javax.servlet.http.HttpServletRequest-javax.servlet.http.HttpServletResponse-java.lang.Object- )