| | |
| | | import com.lf.server.entity.all.ResponseMsg; |
| | | import com.lf.server.entity.all.SettingData; |
| | | import com.lf.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.IOException; |
| | | import java.io.PrintWriter; |
| | | import java.io.*; |
| | | import java.net.URLEncoder; |
| | | import java.sql.Timestamp; |
| | | import java.util.Calendar; |
| | | import java.util.Random; |
| | | import java.util.UUID; |
| | | import java.util.*; |
| | | |
| | | /** |
| | | * Web帮助类 |
| | |
| | | private final static String UNKNOWN = "unknown"; |
| | | |
| | | private final static String COMMA = ","; |
| | | |
| | | private final static Log log = LogFactory.getLog(WebHelper.class); |
| | | |
| | | /** |
| | | * 获取GUID |
| | |
| | | } |
| | | |
| | | /** |
| | | * 输出json数据到前端 |
| | | * 输出str至前端 |
| | | */ |
| | | public static boolean write2Page(HttpServletResponse response, String jsonPack) throws IOException { |
| | | response.setContentType("application/json;charset=UTF-8"); |
| | | response.setHeader("Cache-Control", "no-cache"); |
| | | response.setHeader("Pragma", "No-cache"); |
| | | response.setDateHeader("Expires", 0); |
| | | 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 = response.getWriter(); |
| | | out.print(jsonPack); |
| | | PrintWriter out = res.getWriter(); |
| | | out.print(str); |
| | | |
| | | out.flush(); |
| | | out.close(); |
| | | 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); |
| | | } |
| | | |
| | | /** |
| | |
| | | } |
| | | |
| | | /** |
| | | * 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); |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * 执行命令 |
| | | * |
| | | * @param cmd 命令 |
| | | */ |
| | | public static String exec2(String cmd) { |
| | | try { |
| | | StringBuilder sb = new StringBuilder(); |
| | | Process process = Runtime.getRuntime().exec(cmd); |
| | | BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream())); |
| | | |
| | | String line; |
| | | while ((line = reader.readLine()) != null) { |
| | | sb.append(line).append("\n"); |
| | | } |
| | | reader.close(); |
| | | |
| | | return sb.toString(); |
| | | } catch (Exception ex) { |
| | | log.error(ex.getMessage(), ex); |
| | | 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 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; |
| | | } |
| | | } |