JavaServlet过滤器更改响应？

Question

我有下面的servlet过滤器

public class MyFilter extends BaseServletRequestFilter {

        @Override
    protected void afterExecutingFilterChain(final ServletRequest requset, FilterResponseWrapper response) throws ServletException {

//To do
    }

       @Override
    protected void beforeExecutingFilterChain(final ServletRequest requset, final FilterResponseWrapper response) throws ServletException{

    //Here request needs to be intercepted
   //To do
}


}

我有上面的过滤器。我的要求是拦截请求。我需要检查请求中的一些布尔值。若布尔变量为true，则应继续请求处理。若布尔变量为false，那个么请求将不会继续，我需要发送一些自定义响应，如下所示

public enum CustomStatus {


    OK("Ok"),

    BAD_REQUEST("BadRequest");

    private final String value;

    CustomStatus(String v) {
        value = v;
    }

    public String value() {
        return value;
    }

    public static CustomStatus fromValue(String v) {
        for (CustomStatus c: CustomStatus.values()) {
            if (c.value.equals(v)) {
                return c;
            }
        }
        throw new IllegalArgumentException(v);
    }

}

如果请求布尔变量的值为false，那么我必须将上述自定义状态设置为response并返回，而不处理请求。我该怎么做

谢谢

Answer 1

如果通过扩展Filter来创建Filter，则可以执行以下操作：

public void  doFilter(ServletRequest request, 
      ServletResponse response, 
        FilterChain chain)
        if(your status is ok) {
            chain.doFilter(request, response);
        } else {
            ((HttpServletResponse) response).sendError(the error code,
                                "the error message" );                          
        }
}

Answer 2

使用过滤器界面：

public final class XssFilter implements Filter {

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
  throws IOException, ServletException
{
    //check request...
    if (ok) {
       chain.doFilter(request, response);
    } else {
       // do something with the response
    }
}

再具体不过了，因为您没有说要检查的布尔值的确切位置（是参数、URL的一部分、cookie或标头？），你也没有说你想对回复做什么