Filter中获取传递参数方式(解决post请求参数问题) Filter中获取传递参数方式(解决

Filter中获取传递参数

1. GET 传递
2. Post 传递

XyRequestWrapper 类
XySecurityFilter

Filter中获取传递参数
1. GET 传递
参数可以直接通过request.getParameter获取。

2. Post 传递
产生不能过直接从request.getInputStream() 读取，必须要进行重新写。（request.getInputStream()只能够读取一次）
方式：
通过重写 HttpServletRequestWrapper 类获取getInputStream中的流数据，然后在将body数据进行重新写入传递下去。

XyRequestWrapper 类

package com.xy.boot.cmiap.filter; import com.alibaba.fastjson.JSONObject; import com.xy.boot.common.util.StringUtils; import org.apache.catalina.servlet4preview.http.HttpServletRequestWrapper; import org.apache.commons.codec.Charsets; import javax.servlet.ReadListener; import javax.servlet.ServletInputStream; import javax.servlet.http.HttpServletRequest; import java.io.*; import java.util.Enumeration; import java.util.HashMap; import java.util.Map; /** * Created by fuwenshen * Date:2018/10/26 * Time:12:21 */public class XyRequestWrapper extends HttpServletRequestWrapper { private String body; public XyRequestWrapper(HttpServletRequest request) throws IOException {super(request); StringBuilder stringBuilder = new StringBuilder(); BufferedReader bufferedReader = null; try {InputStream inputStream = request.getInputStream(); if (inputStream != null) {bufferedReader = new BufferedReader(new InputStreamReader(inputStream,"UTF-8")); char[] charBuffer = new char[128]; int bytesRead = -1; while ((bytesRead = bufferedReader.read(charBuffer)) > 0) {stringBuilder.append(charBuffer, 0, bytesRead); }} else {stringBuilder.append(""); }} catch (IOException ex) {throw ex; } finally {if (bufferedReader != null) {try {bufferedReader.close(); } catch (IOException ex) {throw ex; }}}body = stringBuilder.toString(); } @Overridepublic ServletInputStream getInputStream() throws IOException {final ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(body.getBytes("UTF-8")); ServletInputStream servletInputStream = new ServletInputStream() {@Overridepublic boolean isFinished() {return false; } @Overridepublic boolean isReady() {return false; } @Overridepublic void setReadListener(ReadListener readListener) { } @Overridepublic int read() throws IOException {return byteArrayInputStream.read(); }}; return servletInputStream; } @Overridepublic BufferedReader getReader() throws IOException {return new BufferedReader(new InputStreamReader(this.getInputStream(), Charsets.UTF_8)); } public String getBody() {return this.body; } @Overridepublic String getParameter(String name) {return super.getParameter(name); } @Overridepublic Map getParameterMap() {return super.getParameterMap(); } @Overridepublic Enumeration getParameterNames() {return super.getParameterNames(); } @Overridepublic String[] getParameterValues(String name) {return super.getParameterValues(name); } /*** 设置自定义post参数 //** @param paramMaps* @return*/public void setParamsMaps(Map paramMaps) {Map paramBodyMap = new HashMap(); if (!StringUtils.isEmpty(body)) {paramBodyMap = JSONObject.parseObject(body, Map.class); }paramBodyMap.putAll(paramMaps); body = JSONObject.toJSONString(paramBodyMap); }}

XySecurityFilter

package com.xy.boot.cmiap.filter; import com.alibaba.fastjson.JSONObject; import com.xy.boot.cmiap.bo.VerifyTokenResultBO; import com.xy.boot.cmiap.constant.HttpConstant; import com.xy.boot.cmiap.entity.enums.XyHttpCodeEnum; import com.xy.boot.cmiap.service.IXySecurityService; import com.xy.boot.cmiap.service.helper.XyHttpSecurityHelper; import com.xy.boot.common.util.StringUtils; import lombok.extern.slf4j.Slf4j; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.http.MediaType; import org.springframework.stereotype.Component; import javax.servlet.*; import javax.servlet.annotation.WebFilter; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.util.*; /** * Created by fuwenshen * Date:2018/10/29 * Time:15:36 */@Component@Slf4j@WebFilter(filterName = "xySecurityFilter", urlPatterns = {"/api/adv/*"})public class XySecurityFilter implements Filter { @Value("${verify_token_switch}")private boolean tokenSwitch; @Value("${zy.app_secret}")private String zyAppSecret; @Value("${zy.token}")private String zyToken; //验证 token boprivate VerifyTokenResultBO tokenBO=null; @Autowiredprivate IXySecurityService iXySecurityService; @Overridepublic void init(FilterConfig filterConfig) throws ServletException { } @Overridepublic void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {log.debug("进入XySecurityFilter！"); // 参数集合初始化TreeMap paramsMaps = new TreeMap(); String token = null, v = null, timestamp = null, sign = null; HttpServletRequest req = (HttpServletRequest) request; HttpServletResponse resp = (HttpServletResponse) response; resp.setCharacterEncoding("UTF-8"); resp.setContentType(MediaType.APPLICATION_JSON_UTF8_VALUE); /*** 验证通用请求头是否完整*/token = req.getHeader(HttpConstant.TOKEN); v = req.getHeader(HttpConstant.V); timestamp = req.getHeader(HttpConstant.TIMESTAMP); sign = req.getHeader(HttpConstant.SIGN); if (StringUtils.isEmpty(token) || StringUtils.isEmpty(v) || StringUtils.isEmpty(timestamp) || StringUtils.isEmpty(sign)) {resp.sendError(XyHttpCodeEnum.ILLEGAL_REQUEST.getCode(), XyHttpCodeEnum.ILLEGAL_REQUEST.getMessage()); return; } // 防止流读取一次后就没有了, 所以需要将流继续写出去XyRequestWrapper requestWrapper = new XyRequestWrapper(req); /*** 校验token*//*********************************************************/ /*** 获取请求参数*/if ("POST".equals(req.getMethod().toUpperCase())) {String body = requestWrapper.getBody(); paramsMaps = JSONObject.parseObject(body, TreeMap.class); log.debug("parameterMap:" + paramsMaps.toString()); } else { Map parameterMap = requestWrapper.getParameterMap(); Set entries = parameterMap.entrySet(); Iterator iterator = entries.iterator(); while (iterator.hasNext()) {Map.Entry next = iterator.next(); paramsMaps.put(next.getKey(), next.getValue()[0]); }log.debug("parameterMap:" + paramsMaps.toString()); } /*** 验证签名是否合法*//***************************************/ //设置企业信息（自定义参数）if(tokenBO!=null){Map paramsPlus = new HashMap(); paramsPlus.put(HttpConstant.TOKEN, tokenBO.getTokenCode()); paramsPlus.put(HttpConstant.APPID, tokenBO.getAppid()); requestWrapper.setParamsMaps(paramsPlus); } chain.doFilter(requestWrapper, response); } @Overridepublic void destroy() { }}

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