Spring Boot 一个接口同时支持form-data、json 格式的参数

我在开发中碰到了一个需求就是接口需要支持form-data、json 格式的参数，如果用原来springboot的方式只能支持一种入参格式。因此，我使用了原生的HttpServletRequest 接收参数，再根据数据格式进行处理。

private Map<String, Object> userController(HttpServletRequest request) {
 
    String contentType = request.getContentType();
    if (contentType.contains("application/json")) {
        // json 解析...
        return null;
    } else if (contentType.contains("application/x-www-form-urlencoded")) {
        // form 表单解析 ...
        return null;
    } else {
         throw new BizException("不支持的content-type");
    } 
 
}

下面是对具体的参数进行解析的工具类，方便我们解析参数。

public class RequestUtils {
    /**
     * *把request转换成json数据
     **/
    public static String readReqStr(HttpServletRequest request) {
        BufferedReader reader = null;
        StringBuilder sb = new StringBuilder();
        try {
            reader = new BufferedReader(new InputStreamReader(request.getInputStream(), StandardCharsets.UTF_8));
            String line = null;
            while ((line = reader.readLine()) != null) {
                sb.append(line);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (null != reader) {
                    reader.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return sb.toString();
    }

    /**
     * 获取request请求体内容
     */
    public static String getBody(HttpServletRequest request) throws Exception {
        InputStreamReader in = null;
        try {
            in = new InputStreamReader(request.getInputStream(), StandardCharsets.UTF_8);
            StringBuffer bf = new StringBuffer();
            int len;
            char[] chs = new char[1024];
            while ((len = in.read(chs)) != -1) {
                bf.append(new String(chs, 0, len));
            }
            return bf.toString();
        } catch (Exception e) {
            throw e;
        } finally {
            if (null != in) {
                in.close();
            }

        }
    }

    /**
     * *把request转换成xml数据
     **/
    public static String readReqXml(HttpServletRequest request) {
        String inputLine;
        String notityXml = "";
        try {
            while ((inputLine = request.getReader().readLine()) != null) {
                notityXml += inputLine;
            }
            request.getReader().close();
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
        return notityXml;

    }


    /**
     * *把request转换成map数据
     **/
    public static Map<String, String> getRequestParams(HttpServletRequest request) {
        Map<String, String> params = new HashMap<String, String>();
        Map requestParams = request.getParameterMap();
        for (Iterator iter = requestParams.keySet().iterator(); iter.hasNext(); ) {
            String name = (String) iter.next();
            String[] values = (String[]) requestParams.get(name);
            String valueStr = "";
            for (int i = 0; i < values.length; i++) {
                valueStr = (i == values.length - 1) ? valueStr + values[i] : valueStr + values[i] + ",";
            }
            params.put(name, valueStr);
        }
        return params;
    }

    public static String getIpAdrress(HttpServletRequest request) {
        if (request == null) return "localhost/taskhost";
        String Xip = request.getHeader("X-Real-IP");
        String XFor = request.getHeader("X-Forwarded-For");
        if (StringUtils.isNotEmpty(XFor) && !"unKnown".equalsIgnoreCase(XFor)) {
            //多次反向代理后会有多个ip值，第一个ip才是真实ip
            int index = XFor.indexOf(",");
            if (index != -1) {
                return XFor.substring(0, index);
            } else {
                return XFor;
            }
        }
        XFor = Xip;
        if (StringUtils.isNotEmpty(XFor) && !"unKnown".equalsIgnoreCase(XFor)) {
            return XFor;
        }
        if (StringUtils.isBlank(XFor) || "unknown".equalsIgnoreCase(XFor)) {
            XFor = request.getHeader("Proxy-Client-IP");
        }
        if (StringUtils.isBlank(XFor) || "unknown".equalsIgnoreCase(XFor)) {
            XFor = request.getHeader("WL-Proxy-Client-IP");
        }
        if (StringUtils.isBlank(XFor) || "unknown".equalsIgnoreCase(XFor)) {
            XFor = request.getHeader("HTTP_CLIENT_IP");
        }
        if (StringUtils.isBlank(XFor) || "unknown".equalsIgnoreCase(XFor)) {
            XFor = request.getHeader("HTTP_X_FORWARDED_FOR");
        }
        if (StringUtils.isBlank(XFor) || "unknown".equalsIgnoreCase(XFor)) {
            XFor = request.getRemoteAddr();
        }
        return XFor;
    }
}

参考文章：

Spring Boot 一个接口同时支持表单表单、form-data、json 的优雅写法_Java基基的博客-优快云博客