PM20230220027_Service.git

package com.moon.server.helper;
 
import com.alibaba.fastjson.JSON;
import com.moon.server.entity.all.HttpStatus;
import com.moon.server.entity.all.ResponseMsg;
import com.moon.server.entity.all.SettingData;
import com.moon.server.entity.all.StaticData;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
 
import javax.servlet.ServletContext;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.FileInputStream;
import java.io.PrintWriter;
import java.net.URLEncoder;
import java.sql.Timestamp;
import java.util.*;
 
/**
 * Web帮助类
 * @author WWW
 */
public class WebHelper {
    private final static String UNKNOWN = "unknown";
 
    private final static String COMMA = ",";
 
    private final static Log log = LogFactory.getLog(WebHelper.class);
 
    /**
     * 保留小数位
     */
    public static double round(double val, double size) {
        double power = Math.pow(10.0, size);
 
        return Math.round(val * power) / power;
    }
 
    /**
     * 获取GUID
     */
    public static String getGuid() {
        return UUID.randomUUID().toString();
    }
 
    /**
     * 获取用户ip
     */
    public static String getIpAddress(HttpServletRequest request) {
        String ip = request.getHeader("X-Forwarded-For");
        if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");
        }
        if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_FORWARDED");
        }
        if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_CLUSTER_CLIENT_IP");
        }
        if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_CLIENT_IP");
        }
        if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_FORWARDED_FOR");
        }
        if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_FORWARDED");
        }
        if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_VIA");
        }
        if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
            ip = request.getHeader("REMOTE_ADDR");
        }
        if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        if (ip.contains(COMMA)) {
            return ip.split(",")[0];
        }
 
        return ip;
    }
 
    /**
     * 获取当前时间的Timestamp
     */
    public static Timestamp getCurrentTimestamp() {
        return new Timestamp(System.currentTimeMillis());
    }
 
    /**
     * 获取当前时间指定分钟数后的Timestamp
     */
    public static Timestamp getTimestamp(int min) {
        Calendar now = Calendar.getInstance();
        now.add(Calendar.MINUTE, min);
 
        return new Timestamp(now.getTimeInMillis());
    }
 
    /**
     * 从Cookie中获取token
     */
    public static String getTokenFromCookie(HttpServletRequest request) {
        Cookie[] cookies = request.getCookies();
        if (cookies == null || cookies.length == 0) {
            return null;
        }
 
        for (Cookie cookie : cookies) {
            switch (cookie.getName()) {
                case StaticData.TOKEN_COOKIE_KEY:
                    return cookie.getValue();
                default:
                    break;
            }
        }
 
        return null;
    }
 
    /**
     * 向Cookie中添加token
     */
    public static void saveToken2Cookie(String token, HttpServletRequest request, HttpServletResponse response) {
        // 先删除
        deleteCookies(request, response);
 
        // 再保存
        saveCookie(StaticData.TOKEN_COOKIE_KEY, token, response);
    }
 
    /**
     * 保存Cookie
     */
    public static void saveCookie(String key, String value, HttpServletResponse response) {
        Cookie cookie = new Cookie(key, value);
        // 设置cookie失效时间，单位为秒
        cookie.setMaxAge(SettingData.COOKIE_MAX_AGE);
        cookie.setHttpOnly(false);
        cookie.setPath("/");
        //cookie.setDomain("*")
 
        response.setHeader("P3P", "CP=CAO PSA OUR");
        response.addCookie(cookie);
    }
 
    /**
     * 删除cookie中的值
     */
    public static void deleteCookie(String cookieKey, HttpServletRequest request, HttpServletResponse response) {
        Cookie[] cookies = request.getCookies();
        if (cookies != null && cookies.length > 0) {
            for (Cookie c : cookies) {
                if (cookieKey.equalsIgnoreCase(c.getName())) {
                    c.setMaxAge(0);
                    c.setPath("/");
                    response.addCookie(c);
                }
            }
        }
    }
 
    /**
     * 删除所有Cookie
     */
    public static void deleteCookies(HttpServletRequest request, HttpServletResponse response) {
        Cookie[] cookies = request.getCookies();
        if (cookies != null && cookies.length > 0) {
            for (Cookie c : cookies) {
                c.setMaxAge(0);
                c.setPath("/");
                response.addCookie(c);
            }
        }
    }
 
    /**
     * 根据键获取Cookie值
     */
    public static String getCookieByKey(String key, HttpServletRequest request) {
        Cookie[] cookies = request.getCookies();
        if (cookies == null || cookies.length == 0) {
            return null;
        }
 
        for (Cookie c : cookies) {
            if (key.equals(c.getName())) {
                return c.getValue();
            }
        }
 
        return null;
    }
 
    /**
     * 获取Token
     */
    public static String getToken(HttpServletRequest request) {
        // 1.从url参数中，获取token
        String token = request.getParameter(StaticData.TOKEN_KEY);
 
        // 2.为空，则从header里获取
        if (token == null) {
            token = request.getHeader(StaticData.TOKEN_KEY);
        }
 
        // 3.还为空，则从cookie里获取
        if (token == null) {
            token = getTokenFromCookie(request);
        }
 
        return token;
    }
 
    /**
     * 获取Request
     */
    public static HttpServletRequest getRequest() {
        ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
 
        return servletRequestAttributes.getRequest();
    }
 
    /**
     * 获取Response
     */
    public static HttpServletResponse getResponse() {
        ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
 
        return servletRequestAttributes.getResponse();
    }
 
    /**
     * 获取Session
     */
    public static HttpSession getSession() {
        return getRequest().getSession();
    }
 
    /**
     * 获取真实路径
     */
    public static String getRealPath(String path) {
        HttpServletRequest req = getRequest();
        ServletContext ctx = req.getSession().getServletContext();
 
        return ctx.getRealPath("/" + path);
    }
 
    /**
     * 输出str至前端
     */
    public static boolean writeStr2Page(HttpServletResponse res, String str) {
        try {
            res.setContentType("application/json;charset=UTF-8");
            res.setHeader("Cache-Control", "no-cache");
            res.setHeader("Pragma", "No-cache");
            res.setDateHeader("Expires", 0);
 
            PrintWriter out = res.getWriter();
            out.print(str);
 
            out.flush();
            out.close();
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
        }
 
        return false;
    }
 
    /**
     * 输出json至前端
     */
    public static void writeJson2Page(HttpServletResponse res, String str) {
        String json = JSON.toJSONString(new ResponseMsg<>(HttpStatus.ERROR, str));
        writeStr2Page(res, json);
    }
 
    /**
     * 获取错误JSON
     */
    public static String getErrJson(HttpStatus status, String msg) {
        return JSON.toJSONString(new ResponseMsg<String>(status, msg));
    }
 
    /**
     * 写响应信息
     */
    public static void writeInfo(HttpStatus status, String info, HttpServletResponse res) {
        WebHelper.writeStr2Page(res, WebHelper.getErrJson(status, info));
    }
 
    /**
     * 获取随机整数
     */
    public static int getRandomInt(int min, int max) {
        return new Random().nextInt(max) % (max - min + 1) + min;
    }
 
    /**
     * 下载文件
     */
    public static void download(String file, String fileName, HttpServletResponse res) throws Exception {
        download(file, fileName, false, res);
    }
 
    /**
     * 下载文件
     *
     * @param file     文件
     * @param fileName 文件名
     * @param res      响应
     * @throws Exception 异常
     */
    public static void download(String file, String fileName, boolean inline, HttpServletResponse res) throws Exception {
        if (StringHelper.isEmpty(fileName)) {
            fileName = StringHelper.YMDHMS2_FORMAT.format(new Date());
        }
        fileName = URLEncoder.encode(fileName, "UTF-8").replace("+", "%20");
        String dispose = inline ? "inline" : "attachment";
 
        // 设置响应头中文件的下载方式为附件方式，以及设置文件名
        res.setHeader("Content-Disposition", dispose + "; filename*=UTF-8''" + fileName);
        // 设置响应头的编码格式为 UTF-8
        res.setCharacterEncoding("UTF-8");
 
        // 通过response对象设置响应数据格式(如："text/plain; charset=utf-8")
        String ext = FileHelper.getExtension(file);
        String mime = FileHelper.getMime(ext);
        res.setContentType(mime);
 
        // 通过response对象，获取到输出流
        ServletOutputStream outputStream = res.getOutputStream();
        // 定义输入流，通过输入流读取文件内容
        FileInputStream fileInputStream = new FileInputStream(file);
 
        int len = 0;
        byte[] bytes = new byte[1024];
        while ((len = fileInputStream.read(bytes)) != -1) {
            // 通过输入流读取文件数据，然后通过上述的输出流写回浏览器
            outputStream.write(bytes, 0, len);
            outputStream.flush();
        }
 
        // 关闭资源
        fileInputStream.close();
        outputStream.close();
    }
 
    /**
     * 执行命令
     *
     * @param cmd 命令
     */
    public static void exec(String cmd) {
        try {
            Runtime.getRuntime().exec(cmd);
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
        }
    }
 
    /**
     * 获取请求的参数值
     *
     * @param req 请求
     * @param key 参数名
     * @return 参数值
     */
    public static String getReqParamVal(HttpServletRequest req, String key) {
        Map<String, String[]> maps = req.getParameterMap();
        for (Map.Entry<String, String[]> entry : maps.entrySet()) {
            if (entry.getKey().equalsIgnoreCase(key)) {
                return null == entry.getValue() || 0 == entry.getValue().length ? null : entry.getValue()[0];
            }
        }
 
        return null;
    }
 
    /**
     * 获取请求的参数值
     *
     * @param req 请求
     * @param key 参数名
     * @return 参数值
     */
    public static String[] getReqParamVals(HttpServletRequest req, String key) {
        Map<String, String[]> maps = req.getParameterMap();
        for (Map.Entry<String, String[]> entry : maps.entrySet()) {
            if (entry.getKey().equalsIgnoreCase(key)) {
                return entry.getValue();
            }
        }
 
        return null;
    }
}