spring boot实现在request里解密参数返回

import javax.servlet.ReadListener;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.io.*;
import java.nio.charset.Charset;
import java.util.HashMap;
import java.util.Map;
public class ParameterRequest extends HttpServletRequestWrapper {
    private Map<String, String[]> params = new HashMap<>(16);
    public ParameterRequest(HttpServletRequest request) throws IOException {
        super(request);
        this.params.putAll(request.getParameterMap());
    }
    /**
     * 重载一个构造方法
     *
     * @param request
     * @param extendParams
     */
    public ParameterRequest(HttpServletRequest request, Map<String, String[]> extendParams) throws IOException {
        this(request);
        addAllParameters(extendParams);
    }
    @Override
    public String getParameter(String name) {
        String[] values = params.get(name);
        if (values == null || values.length == 0) {
            return null;
        }
        return values[0];
    }
    @Override
    public String[] getParameterValues(String name) {
        return params.get(name);
    }
    public void addAllParameters(Map<String, String[]> otherParams) {
        for (Map.Entry<String, String[]> entry : otherParams.entrySet()) {
            addParameter(entry.getKey(), entry.getValue());
        }
    }
    public void addParameter(String name, Object value) {
        if (value != null) {
            if (value instanceof String[]) {
                params.put(name, (String[]) value);
            } else if (value instanceof String) {
                params.put(name, new String[]{(String) value});
            } else {
                params.put(name, new String[]{String.valueOf(value)});
            }
        }
    }
}

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.context.support.SpringBeanAutowiringSupport;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
@Slf4j
public class WebParamFilter implements Filter {
    private static final String OPTIONS = "OPTIONS";
    @Value("${jwt.info.urlPatterns}")
    private List<String> urlPatterns;
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        SpringBeanAutowiringSupport.processInjectionBasedOnServletContext(this, filterConfig.getServletContext());
    }
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        log.info("开始过滤器===============");
        if (!isFilter(request)) {
            writerError(response, RetEnum.RET_TOKEN_ERROR);
            return;
        }
        // 从请求头从获取请求类型，1是WEB，2是APP
        String requestType = request.getHeader("requestType");
        if (StringUtils.isEmpty(requestType)) {
            writerError(response, RetEnum.RET_NOT_HEADER_ERROR);
            return;
        }
        Map<String, String[]> paramsMap = new HashMap<>();
        if ("1".equals(requestType)) {
        	// 验证签名，签名错误直接返回
            if (!compareSign(request)) {
                writerError(response, "签名错误", 500);
                return;
            }
            // 将请求的参数从request中取出，转换成JSON，放入自定义的Map中带给控制器
            paramsMap.put("params", new String[]{JSONUtil.getJSONParam(request).toJSONString()});
            ParameterRequest req = new ParameterRequest(request, paramsMap);
            filterChain.doFilter(req, response);
        } else if ("2".equals(requestType)) {
        	// APP请求方式比较特殊，所以要从requestBody里读出JSON加密数据
            String bodyStr = RequestBodyUtil.read(request.getReader());
            // 然后再解密，拿到真正的参数转换成JSON，放入自定义的Map中带给控制器
            JSONObject jsonParam = getJsonParam(bodyStr);
            paramsMap.put("params", new String[]{jsonParam.toJSONString()});
            ParameterRequest req = new ParameterRequest(request, paramsMap);
            filterChain.doFilter(req, response);
        } else {
            writerError(response, "无效的请求来源", 500);
        }
    }
    @Override
    public void destroy() {
    }
    /**
     * 筛选
     *
     * @param request
     * @return
     */
    private boolean isFilter(HttpServletRequest request) {
        if (OPTIONS.equals(request.getMethod())) {
            return true;
        }
        if (isInclude(request)) {
            //如果是属于排除的URL，比如登录，注册，验证码等URL，则直接通行
  <strong>本文来源gaodai#ma#com搞@代~码^网+</strong>          log.info("直接通过");
            return true;
        }
        return tokenCheck(request);
    }
    /**
     * 排除不需要过滤的URL
     *
     * @param request
     * @return
     */
    private boolean isInclude(HttpServletRequest request) {
        String url = request.getRequestURI().substring(request.getContextPath().length());
        log.info("请求url:{}", url);
        for (String patternUrl : urlPatterns) {
            Pattern p = Pattern.compile(patternUrl);
            Matcher m = p.matcher(url);
            if (m.find()) {
                return true;
            }
        }
        return false;
    }
    /**
     * 效验token是否有效
     *
     * @param request
     * @return
     */
    private boolean tokenCheck(HttpServletRequest request) {
        String authToken = request.getHeader("accessToken");
        log.info("请求头中令牌token:{}", authToken);
        // ...业务代码
        return false;
    }
    /**
     * 错误写出
     *
     * @param response
     * @param retEnum
     * @throws IOException
     */
    private void writerError(HttpServletResponse response, String msg, int code) throws IOException {
        //验证不通过
        response.setCharacterEncoding("UTF-8");
        response.setContentType("application/json; charset=utf-8");
        response.setStatus(HttpServletResponse.SC_OK);
        //将验证不通过的错误返回
        ObjectMapper mapper = new ObjectMapper();
        Map<String, Object> resultMap = new HashMap<>(3);
        resultMap.put("code", code);
        resultMap.put("msg", msg);
        resultMap.put("data", null);
        response.getWriter().write(mapper.writeValueAsString(resultMap));
    }
    /**
     * web效验签名
     *
     * @param request
     * @return
     */
    public boolean compareSign(HttpServletRequest request) {
        JSONObject param = JSONUtil.getJSONParam(request);
        String sign = JSONUtil.getParamRequired(param, String.class, "sign");
       // ...业务代码
        return s.equals(sign);
    }
 	/**
     * APP解密参数
     *
     * @param json
     * @return
     */
    public JSONObject getJsonParam(String json) {
        JSONObject jsonParam = JSON.parseObject(json);
        String aos = jsonParam.getString("aos");
        String params = jsonParam.getString("params");
        String param = null;
        if (jsonParam != null && !StringUtils.isEmpty(aos) && !StringUtils.isEmpty(params)) {
            String key = RSA.rsaDecrypt(aos, "自定义的私钥");
            if (StringUtils.isBlank(key)) {
                return null;
            }
            try {
                param = AES256.decrypt(params, key);
            } catch (Exception e) {
                e.printStackTrace();
            }
            if (StringUtils.isBlank(param)) {
                return null;
            }
        }
        if (StringUtils.isBlank(param)) {
            return null;
        }
        return JSONObject.parseObject(param);
    }
}