过滤器实现只对controller层进行过滤

最新推荐文章于 2023-05-26 09:39:41 发布

aiyongbo123456

最新推荐文章于 2023-05-26 09:39:41 发布

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本文详细介绍了SpringBoot框架下控制器层的请求处理方式，特别关注了以.do结尾的请求路径。同时，深入探讨了如何在过滤器中对特定请求进行判断与处理，包括对响应内容的修改和加密操作。

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1、controller层的请求都已.do结束

package com.example.demo.controller;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiOperation;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
@Api("SampleController相关的api")
public class SampleController {
    @ApiOperation(value = "home", notes = "home")
    @ApiImplicitParam(name = "name", value = "姓名", required = true, dataType = "String")
    @RequestMapping(value = "/home.do",method = RequestMethod.GET)
    public String home(String name) {
        String result="controller：Hello " + name;
        System.out.println("");
        return result;
    }
}

2、过滤器中添加判断

package com.example.demo.filter;

import com.example.demo.wrapper.ResponseWrapper;
import org.apache.commons.lang.StringUtils;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Component;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;

@Component
public class ResponseFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void destroy() {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        String URL = request.getRequestURL().toString();
        if (URL.indexOf(".do")<0) {
            filterChain.doFilter(servletRequest, servletResponse);
        } else {
            ResponseWrapper responseWrapper = new ResponseWrapper((HttpServletResponse) servletResponse);
            filterChain.doFilter(servletRequest, responseWrapper);
            String contentType = responseWrapper.getContentType();
            byte[] content = responseWrapper.getResponseData();
            String str = "";
            if (StringUtils.isNotBlank(contentType) && (contentType.contains(MediaType.APPLICATION_JSON_VALUE) || contentType.contains(MediaType.TEXT_HTML_VALUE))) {
                str = new String(content);
                str = str + "加密";
                System.out.println("filter:" + str);
                HttpServletResponse response = (HttpServletResponse) servletResponse;
                writeResponse(response, 200, str);
            }
        }
    }

    public static void writeResponse(HttpServletResponse response, int status, String json) {
        try {
            response.reset();//很重要
            response.setHeader("Access-Control-Allow-Origin", "*");
            response.setHeader("Access-Control-Allow-Methods", "*");
            response.setContentType("application/json;charset=UTF-8");
            response.setStatus(status);
            response.getWriter().write(json);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}