package com.se.simu.helper;
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import com.alibaba.fastjson.JSON;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.http.HttpStatus;
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import org.springframework.web.context.request.RequestContextHolder;
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import org.springframework.web.context.request.ServletRequestAttributes;
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import javax.servlet.ServletOutputStream;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.*;
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import java.net.InetAddress;
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import java.net.URLEncoder;
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import java.net.UnknownHostException;
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import java.sql.Timestamp;
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import java.text.SimpleDateFormat;
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import java.util.*;
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/**
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* Web帮助类
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*
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* @author WWW
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* @date 2024-07-16
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*/
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@Slf4j
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public class WebHelper {
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public final static String POINT = ".";
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private final static String COMMA = ",";
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private final static String UNKNOWN = "unknown";
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public static boolean isWin() {
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String osName = System.getProperty("os.name");
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return osName.startsWith("Windows");
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}
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/**
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* 格式化日期
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*/
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public final static SimpleDateFormat YMDHMS = new SimpleDateFormat("yyyyMMddHHmmss");
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/**
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* 字符串,是否为空null和空格
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*/
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public static boolean isEmpty(String str) {
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return null == str || "".equals(str.trim());
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}
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/**
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* 获取GUID
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*/
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public static String getGuid() {
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return UUID.randomUUID().toString();
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}
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/**
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* 获取主机IP
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*/
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public static String getHostIp() {
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try {
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return InetAddress.getLocalHost().getHostAddress();
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} catch (UnknownHostException e) {
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//
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}
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return "127.0.0.1";
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}
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/**
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* 获取用户IP
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*/
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public static String getIpAddress(HttpServletRequest request) {
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String ip = request.getHeader("X-Forwarded-For");
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if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
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ip = request.getHeader("Proxy-Client-IP");
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}
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if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
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ip = request.getHeader("WL-Proxy-Client-IP");
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}
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if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
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ip = request.getHeader("HTTP_X_FORWARDED_FOR");
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}
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if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
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ip = request.getHeader("HTTP_X_FORWARDED");
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}
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if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
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ip = request.getHeader("HTTP_X_CLUSTER_CLIENT_IP");
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}
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if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
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ip = request.getHeader("HTTP_CLIENT_IP");
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}
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if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
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ip = request.getHeader("HTTP_FORWARDED_FOR");
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}
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if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
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ip = request.getHeader("HTTP_FORWARDED");
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}
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if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
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ip = request.getHeader("HTTP_VIA");
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}
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if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
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ip = request.getHeader("REMOTE_ADDR");
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}
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if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
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ip = request.getRemoteAddr();
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}
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if (ip.contains(COMMA)) {
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return ip.split(",")[0];
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}
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return ip;
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}
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/**
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* 获取当前时间的Timestamp
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*/
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public static Timestamp getCurrentTimestamp() {
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return new Timestamp(System.currentTimeMillis());
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}
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/**
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* 获取Request
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*/
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public static HttpServletRequest getRequest() {
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ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
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return servletRequestAttributes.getRequest();
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}
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/**
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* 获取Response
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*/
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public static HttpServletResponse getResponse() {
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ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
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return servletRequestAttributes.getResponse();
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}
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/**
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* 输出JSON至页面
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*/
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public static boolean writeJson2Page(HttpServletResponse res, HttpStatus status, Object obj) {
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res.setStatus(status.value());
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return writeStr2Page(res, JSON.toJSONString(obj));
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}
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/**
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* 输出JSON至页面
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*/
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public static boolean writeJson2Page(HttpServletResponse res, HttpStatus status, String str) {
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res.setStatus(status.value());
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Map<String, Object> map = new HashMap(2);
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map.put("code", status.value() >= 400 ? -1 : 0);
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map.put("msg", str);
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return writeStr2Page(res, JSON.toJSONString(map));
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}
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/**
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* 输出str至页面
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*/
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public static boolean writeStr2Page(HttpServletResponse res, HttpStatus status, String str) {
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res.setStatus(status.value());
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return writeStr2Page(res, str);
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}
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/**
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* 输出str至页面
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*/
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public static boolean writeStr2Page(HttpServletResponse res, String str) {
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try {
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res.setContentType("application/json;charset=UTF-8");
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res.setHeader("Cache-Control", "no-cache");
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res.setHeader("Pragma", "No-cache");
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res.setDateHeader("Expires", 0);
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PrintWriter out = res.getWriter();
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out.print(str);
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out.flush();
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out.close();
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} catch (Exception ex) {
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log.error(ex.getMessage(), ex);
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}
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return false;
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}
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/**
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* 输出字节数组
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*/
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public static void writeBytes(byte[] bytes, HttpServletResponse res) throws IOException {
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res.setContentType("application/octet-stream");
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if (null == bytes) {
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res.setStatus(HttpStatus.NOT_FOUND.value());
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return;
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}
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OutputStream os = res.getOutputStream();
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os.write(bytes, 0, bytes.length);
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os.close();
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}
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/**
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* 输出Png文件
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*/
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public static void writePng(String filePath, HttpServletResponse res) throws IOException {
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File file = new File(filePath);
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if (!file.exists() || file.isDirectory()) {
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res.setStatus(HttpStatus.NOT_FOUND.value());
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return;
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}
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String fileName = URLEncoder.encode(filePath, "UTF-8").replace("+", "%20");
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res.setHeader("Content-Disposition", "attachment; filename*=UTF-8''" + fileName);
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res.setCharacterEncoding("UTF-8");
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res.setContentType("image/png");
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writeFile(filePath, res);
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}
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/**
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* 获取随机整数
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*/
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public static int getRandomInt(int min, int max) {
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return new Random().nextInt(max) % (max - min + 1) + min;
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}
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/**
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* 下载文件
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*/
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public static void download(String file, String fileName, HttpServletResponse res) throws Exception {
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download(file, fileName, false, res);
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}
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/**
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* 下载文件
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*
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* @param file 文件
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* @param fileName 文件名
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* @param res 响应
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* @throws Exception 异常
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*/
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public static void download(String file, String fileName, boolean inline, HttpServletResponse res) throws Exception {
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if (isEmpty(fileName)) {
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fileName = YMDHMS.format(new Date());
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}
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fileName = URLEncoder.encode(fileName, "UTF-8").replace("+", "%20");
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String dispose = inline ? "inline" : "attachment";
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// 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
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res.setHeader("Content-Disposition", dispose + "; filename*=UTF-8''" + fileName);
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// 设置响应头的编码格式为 UTF-8
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res.setCharacterEncoding("UTF-8");
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// 通过response对象设置响应数据格式(如："text/plain; charset=utf-8")
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String ext = getExtension(file);
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String mime = getMime(ext);
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res.setContentType(mime);
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writeFile(file, res);
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}
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/**
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* 写文件
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*/
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private static void writeFile(String file, HttpServletResponse res) throws IOException {
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// 通过response对象，获取到输出流
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ServletOutputStream outputStream = res.getOutputStream();
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// 定义输入流，通过输入流读取文件内容
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FileInputStream fileInputStream = new FileInputStream(file);
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int len = 0;
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byte[] bytes = new byte[1024];
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while ((len = fileInputStream.read(bytes)) != -1) {
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// 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
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outputStream.write(bytes, 0, len);
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outputStream.flush();
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}
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// 关闭资源
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fileInputStream.close();
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outputStream.close();
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}
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/**
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* 获取文件扩展名
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*/
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public static String getExtension(String fileName) {
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if (isEmpty(fileName)) {
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return "";
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}
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int idx = fileName.lastIndexOf(POINT);
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if (idx == -1) {
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return "";
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}
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return fileName.substring(idx).toLowerCase();
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}
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/**
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* 获取多用途互联网邮件扩展类型
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*/
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public static String getMime(String ext) {
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switch (ext) {
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// 图片
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case ".tif":
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case ".tiff":
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return "image/tiff";
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case ".img":
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return "application/x-img";
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case ".gif":
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return "image/gif";
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case ".jpg":
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case ".jpeg":
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return "image/jpeg";
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case ".png":
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return "image/png";
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// 音/视频
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case ".mp3":
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return "audio/mp3";
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case ".mp4":
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return "video/mpeg4";
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case ".avi":
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return "video/avi";
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case ".mpg":
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case ".mpeg":
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return "video/mpg";
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case ".wav":
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return "audio/wav";
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case ".wma":
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return "audio/x-ms-wma";
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case ".swf":
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return "application/x-shockwave-flash";
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case ".wmv":
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return "video/x-ms-wmv";
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case ".rm":
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return "application/vnd.rn-realmedia";
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case ".rmvb":
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return "application/vnd.rn-realmedia-vbr";
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// 网页
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case ".js":
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return "application/x-javascript";
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case ".css":
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return "text/css";
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case ".asp":
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return "text/asp";
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case ".mht":
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return "message/rfc822";
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case ".jsp":
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case ".htm":
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case ".html":
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case ".xhtml":
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return "text/html";
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case ".xml":
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case ".svg":
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return "text/xml";
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// 文件
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case ".txt":
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return "text/plain";
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case ".dbf":
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return "application/x-dbf";
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case ".mdb":
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return "application/msaccess";
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case ".pdf":
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return "application/pdf";
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case ".ppt":
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case ".pptx":
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return "application/x-ppt";
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case ".doc":
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case ".docx":
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return "application/msword";
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case ".xls":
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case ".xlsx":
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return "application/vnd.ms-excel";
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case ".dgn":
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return "application/x-dgn";
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case ".dwg":
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return "application/x-dwg";
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case ".ext":
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return "application/x-msdownload";
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// 默认
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default:
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return "application/octet-stream";
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}
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}
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}
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