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工具类集合

發布時間：2024/9/27 编程问答 22 豆豆

生活随笔收集整理的這篇文章主要介紹了工具类集合小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

工具類集和Utils

Cookie	CookieUtils.java
EasyUI	EasyUIResult.java
Exception	ExceptionUtil.java
FastDFS	FastDFSClient.java
Ftp	FtpUtil.java
HttpClient	HttpClientUtil.java
ID	IDUtils.java
Json	JsonUtils.java
Picture	PictureResult.java
通用響應工具類	TaotaoResult.java

CookieUtils.java

package com.taotao.common.utils;import java.io.UnsupportedEncodingException; import java.net.URLDecoder; import java.net.URLEncoder;import javax.servlet.http.Cookie; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;/*** * Cookie 工具類**/ public final class CookieUtils {/*** 得到Cookie的值, 不編碼* * @param request* @param cookieName* @return*/public static String getCookieValue(HttpServletRequest request, String cookieName) {return getCookieValue(request, cookieName, false);}/*** 得到Cookie的值,* * @param request* @param cookieName* @return*/public static String getCookieValue(HttpServletRequest request, String cookieName, boolean isDecoder) {Cookie[] cookieList = request.getCookies();if (cookieList == null || cookieName == null) {return null;}String retValue = null;try {for (int i = 0; i < cookieList.length; i++) {if (cookieList[i].getName().equals(cookieName)) {if (isDecoder) {retValue = URLDecoder.decode(cookieList[i].getValue(), "UTF-8");} else {retValue = cookieList[i].getValue();}break;}}} catch (UnsupportedEncodingException e) {e.printStackTrace();}return retValue;}/*** 得到Cookie的值,* * @param request* @param cookieName* @return*/public static String getCookieValue(HttpServletRequest request, String cookieName, String encodeString) {Cookie[] cookieList = request.getCookies();if (cookieList == null || cookieName == null) {return null;}String retValue = null;try {for (int i = 0; i < cookieList.length; i++) {if (cookieList[i].getName().equals(cookieName)) {retValue = URLDecoder.decode(cookieList[i].getValue(), encodeString);break;}}} catch (UnsupportedEncodingException e) {e.printStackTrace();}return retValue;}/*** 設置Cookie的值不設置生效時間默認瀏覽器關閉即失效,也不編碼*/public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,String cookieValue) {setCookie(request, response, cookieName, cookieValue, -1);}/*** 設置Cookie的值在指定時間內生效,但不編碼*/public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,String cookieValue, int cookieMaxage) {setCookie(request, response, cookieName, cookieValue, cookieMaxage, false);}/*** 設置Cookie的值不設置生效時間,但編碼*/public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,String cookieValue, boolean isEncode) {setCookie(request, response, cookieName, cookieValue, -1, isEncode);}/*** 設置Cookie的值在指定時間內生效, 編碼參數*/public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,String cookieValue, int cookieMaxage, boolean isEncode) {doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, isEncode);}/*** 設置Cookie的值在指定時間內生效, 編碼參數(指定編碼)*/public static void setCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,String cookieValue, int cookieMaxage, String encodeString) {doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, encodeString);}/*** 刪除Cookie帶cookie域名*/public static void deleteCookie(HttpServletRequest request, HttpServletResponse response,String cookieName) {doSetCookie(request, response, cookieName, "", -1, false);}/*** 設置Cookie的值，并使其在指定時間內生效* * @param cookieMaxage cookie生效的最大秒數*/private static final void doSetCookie(HttpServletRequest request, HttpServletResponse response,String cookieName, String cookieValue, int cookieMaxage, boolean isEncode) {try {if (cookieValue == null) {cookieValue = "";} else if (isEncode) {cookieValue = URLEncoder.encode(cookieValue, "utf-8");}Cookie cookie = new Cookie(cookieName, cookieValue);if (cookieMaxage > 0)cookie.setMaxAge(cookieMaxage);if (null != request) {// 設置域名的cookieString domainName = getDomainName(request);System.out.println(domainName);if (!"localhost".equals(domainName)) {cookie.setDomain(domainName);}}cookie.setPath("/");response.addCookie(cookie);} catch (Exception e) {e.printStackTrace();}}/*** 設置Cookie的值，并使其在指定時間內生效* * @param cookieMaxage cookie生效的最大秒數*/private static final void doSetCookie(HttpServletRequest request, HttpServletResponse response,String cookieName, String cookieValue, int cookieMaxage, String encodeString) {try {if (cookieValue == null) {cookieValue = "";} else {cookieValue = URLEncoder.encode(cookieValue, encodeString);}Cookie cookie = new Cookie(cookieName, cookieValue);if (cookieMaxage > 0)cookie.setMaxAge(cookieMaxage);if (null != request) {// 設置域名的cookieString domainName = getDomainName(request);System.out.println(domainName);if (!"localhost".equals(domainName)) {cookie.setDomain(domainName);}}cookie.setPath("/");response.addCookie(cookie);} catch (Exception e) {e.printStackTrace();}}/*** 得到cookie的域名*/private static final String getDomainName(HttpServletRequest request) {String domainName = null;String serverName = request.getRequestURL().toString();if (serverName == null || serverName.equals("")) {domainName = "";} else {serverName = serverName.toLowerCase();serverName = serverName.substring(7);final int end = serverName.indexOf("/");serverName = serverName.substring(0, end);final String[] domains = serverName.split("\\.");int len = domains.length;if (len > 3) {// www.xxx.com.cndomainName = "." + domains[len - 3] + "." + domains[len - 2] + "." + domains[len - 1];} else if (len <= 3 && len > 1) {// xxx.com or xxx.cndomainName = "." + domains[len - 2] + "." + domains[len - 1];} else {domainName = serverName;}}if (domainName != null && domainName.indexOf(":") > 0) {String[] ary = domainName.split("\\:");domainName = ary[0];}return domainName;} }

EasyUIResult.java

package com.taotao.result;import java.util.List;/*** easyUIDataGrid對象返回值* Title: EasyUIResult* Description: * Company: www.itcast.com * @author 入云龍* @date 2015年7月21日下午4:12:52* @version 1.0*/ public class EasyUIResult {private Integer total;private List<?> rows;public EasyUIResult(Integer total, List<?> rows) {this.total = total;this.rows = rows;}public EasyUIResult(long total, List<?> rows) {this.total = (int) total;this.rows = rows;}public Integer getTotal() {return total;}public void setTotal(Integer total) {this.total = total;}public List<?> getRows() {return rows;}public void setRows(List<?> rows) {this.rows = rows;} }

ExceptionUtil.java

package com.taotao.utils;import java.io.PrintWriter; import java.io.StringWriter;public class ExceptionUtil {/*** 獲取異常的堆棧信息* * @param t* @return*/public static String getStackTrace(Throwable t) {StringWriter sw = new StringWriter();PrintWriter pw = new PrintWriter(sw);try {t.printStackTrace(pw);return sw.toString();} finally {pw.close();}} }

FastDFSClient.java

package cn.itcast.fastdfs.cliennt;import org.csource.common.NameValuePair; import org.csource.fastdfs.ClientGlobal; import org.csource.fastdfs.StorageClient1; import org.csource.fastdfs.StorageServer; import org.csource.fastdfs.TrackerClient; import org.csource.fastdfs.TrackerServer;public class FastDFSClient {private TrackerClient trackerClient = null;private TrackerServer trackerServer = null;private StorageServer storageServer = null;private StorageClient1 storageClient = null;public FastDFSClient(String conf) throws Exception {if (conf.contains("classpath:")) {conf = conf.replace("classpath:", this.getClass().getResource("/").getPath());}ClientGlobal.init(conf);trackerClient = new TrackerClient();trackerServer = trackerClient.getConnection();storageServer = null;storageClient = new StorageClient1(trackerServer, storageServer);}/*** 上傳文件方法* Title: uploadFile* Description: * @param fileName 文件全路徑* @param extName 文件擴展名，不包含（.）* @param metas 文件擴展信息* @return* @throws Exception*/public String uploadFile(String fileName, String extName, NameValuePair[] metas) throws Exception {String result = storageClient.upload_file1(fileName, extName, metas);return result;}public String uploadFile(String fileName) throws Exception {return uploadFile(fileName, null, null);}public String uploadFile(String fileName, String extName) throws Exception {return uploadFile(fileName, extName, null);}/*** 上傳文件方法* Title: uploadFile* Description: * @param fileContent 文件的內容，字節數組* @param extName 文件擴展名* @param metas 文件擴展信息* @return* @throws Exception*/public String uploadFile(byte[] fileContent, String extName, NameValuePair[] metas) throws Exception {String result = storageClient.upload_file1(fileContent, extName, metas);return result;}public String uploadFile(byte[] fileContent) throws Exception {return uploadFile(fileContent, null, null);}public String uploadFile(byte[] fileContent, String extName) throws Exception {return uploadFile(fileContent, extName, null);} }

FtpUtil.java

package com.taotao.utils;import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream;import org.apache.commons.net.ftp.FTP; import org.apache.commons.net.ftp.FTPClient; import org.apache.commons.net.ftp.FTPFile; import org.apache.commons.net.ftp.FTPReply;/*** ftp上傳下載工具類* Title: FtpUtil* Description: * Company: www.itcast.com * @author 入云龍* @date 2015年7月29日下午8:11:51* @version 1.0*/ public class FtpUtil {/** * Description: 向FTP服務器上傳文件 * @param host FTP服務器hostname * @param port FTP服務器端口 * @param username FTP登錄賬號 * @param password FTP登錄密碼 * @param basePath FTP服務器基礎目錄* @param filePath FTP服務器文件存放路徑。例如分日期存放：/2015/01/01。文件的路徑為basePath+filePath* @param filename 上傳到FTP服務器上的文件名 * @param input 輸入流 * @return 成功返回true，否則返回false */ public static boolean uploadFile(String host, int port, String username, String password, String basePath,String filePath, String filename, InputStream input) {boolean result = false;FTPClient ftp = new FTPClient();try {int reply;ftp.connect(host, port);// 連接FTP服務器// 如果采用默認端口，可以使用ftp.connect(host)的方式直接連接FTP服務器ftp.login(username, password);// 登錄reply = ftp.getReplyCode();if (!FTPReply.isPositiveCompletion(reply)) {ftp.disconnect();return result;}//切換到上傳目錄if (!ftp.changeWorkingDirectory(basePath+filePath)) {//如果目錄不存在創建目錄String[] dirs = filePath.split("/");String tempPath = basePath;for (String dir : dirs) {if (null == dir || "".equals(dir)) continue;tempPath += "/" + dir;if (!ftp.changeWorkingDirectory(tempPath)) {if (!ftp.makeDirectory(tempPath)) {return result;} else {ftp.changeWorkingDirectory(tempPath);}}}}//設置上傳文件的類型為二進制類型ftp.setFileType(FTP.BINARY_FILE_TYPE);//上傳文件if (!ftp.storeFile(filename, input)) {return result;}input.close();ftp.logout();result = true;} catch (IOException e) {e.printStackTrace();} finally {if (ftp.isConnected()) {try {ftp.disconnect();} catch (IOException ioe) {}}}return result;}/** * Description: 從FTP服務器下載文件 * @param host FTP服務器hostname * @param port FTP服務器端口 * @param username FTP登錄賬號 * @param password FTP登錄密碼 * @param remotePath FTP服務器上的相對路徑 * @param fileName 要下載的文件名 * @param localPath 下載后保存到本地的路徑 * @return */ public static boolean downloadFile(String host, int port, String username, String password, String remotePath,String fileName, String localPath) {boolean result = false;FTPClient ftp = new FTPClient();try {int reply;ftp.connect(host, port);// 如果采用默認端口，可以使用ftp.connect(host)的方式直接連接FTP服務器ftp.login(username, password);// 登錄reply = ftp.getReplyCode();if (!FTPReply.isPositiveCompletion(reply)) {ftp.disconnect();return result;}ftp.changeWorkingDirectory(remotePath);// 轉移到FTP服務器目錄FTPFile[] fs = ftp.listFiles();for (FTPFile ff : fs) {if (ff.getName().equals(fileName)) {File localFile = new File(localPath + "/" + ff.getName());OutputStream is = new FileOutputStream(localFile);ftp.retrieveFile(ff.getName(), is);is.close();}}ftp.logout();result = true;} catch (IOException e) {e.printStackTrace();} finally {if (ftp.isConnected()) {try {ftp.disconnect();} catch (IOException ioe) {}}}return result;}public static void main(String[] args) {try { FileInputStream in=new FileInputStream(new File("D:\\temp\\image\\gaigeming.jpg")); boolean flag = uploadFile("192.168.0.0", 21, "ftpuser", "ftpuser", "/home/ftpuser/www/images","/2015/01/21", "gaigeming.jpg", in); System.out.println(flag); } catch (FileNotFoundException e) { e.printStackTrace(); } } }

HttpClientUtil.java

package com.taotao.utils;import java.io.IOException; import java.net.URI; import java.util.ArrayList; import java.util.List; import java.util.Map;import org.apache.http.NameValuePair; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.client.utils.URIBuilder; import org.apache.http.entity.ContentType; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.message.BasicNameValuePair; import org.apache.http.util.EntityUtils;public class HttpClientUtil {public static String doGet(String url, Map<String, String> param) {// 創建Httpclient對象CloseableHttpClient httpclient = HttpClients.createDefault();String resultString = "";CloseableHttpResponse response = null;try {// 創建uriURIBuilder builder = new URIBuilder(url);if (param != null) {for (String key : param.keySet()) {builder.addParameter(key, param.get(key));}}URI uri = builder.build();// 創建http GET請求HttpGet httpGet = new HttpGet(uri);// 執行請求response = httpclient.execute(httpGet);// 判斷返回狀態是否為200if (response.getStatusLine().getStatusCode() == 200) {resultString = EntityUtils.toString(response.getEntity(), "UTF-8");}} catch (Exception e) {e.printStackTrace();} finally {try {if (response != null) {response.close();}httpclient.close();} catch (IOException e) {e.printStackTrace();}}return resultString;}public static String doGet(String url) {return doGet(url, null);}public static String doPost(String url, Map<String, String> param) {// 創建Httpclient對象CloseableHttpClient httpClient = HttpClients.createDefault();CloseableHttpResponse response = null;String resultString = "";try {// 創建Http Post請求HttpPost httpPost = new HttpPost(url);// 創建參數列表if (param != null) {List<NameValuePair> paramList = new ArrayList<>();for (String key : param.keySet()) {paramList.add(new BasicNameValuePair(key, param.get(key)));}// 模擬表單UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList);httpPost.setEntity(entity);}// 執行http請求response = httpClient.execute(httpPost);resultString = EntityUtils.toString(response.getEntity(), "utf-8");} catch (Exception e) {e.printStackTrace();} finally {try {response.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}return resultString;}public static String doPost(String url) {return doPost(url, null);}public static String doPostJson(String url, String json) {// 創建Httpclient對象CloseableHttpClient httpClient = HttpClients.createDefault();CloseableHttpResponse response = null;String resultString = "";try {// 創建Http Post請求HttpPost httpPost = new HttpPost(url);// 創建請求內容StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);httpPost.setEntity(entity);// 執行http請求response = httpClient.execute(httpPost);resultString = EntityUtils.toString(response.getEntity(), "utf-8");} catch (Exception e) {e.printStackTrace();} finally {try {response.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}return resultString;} }

IDUtils.java

package com.taotao.utils;import java.util.Random;/*** 各種id生成策略* Title: IDUtils* Description: * Company: www.itcast.com * @author 入云龍* @date 2015年7月22日下午2:32:10* @version 1.0*/ public class IDUtils {/*** 圖片名生成*/public static String genImageName() {//取當前時間的長整形值包含毫秒long millis = System.currentTimeMillis();//long millis = System.nanoTime();//加上三位隨機數Random random = new Random();int end3 = random.nextInt(999);//如果不足三位前面補0String str = millis + String.format("%03d", end3);return str;}/*** 商品id生成*/public static long genItemId() {//取當前時間的長整形值包含毫秒long millis = System.currentTimeMillis();//long millis = System.nanoTime();//加上兩位隨機數Random random = new Random();int end2 = random.nextInt(99);//如果不足兩位前面補0String str = millis + String.format("%02d", end2);long id = new Long(str);return id;}public static void main(String[] args) {for(int i=0;i< 100;i++)System.out.println(genItemId());} }

JsonUtils.java

package com.taotao.utils;import java.util.List;import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.databind.JavaType; import com.fasterxml.jackson.databind.JsonNode; import com.fasterxml.jackson.databind.ObjectMapper;/*** 淘淘商城自定義響應結構*/ public class JsonUtils {// 定義jackson對象private static final ObjectMapper MAPPER = new ObjectMapper();/*** 將對象轉換成json字符串。* Title: pojoToJson* Description: * @param data* @return*/public static String objectToJson(Object data) {try {String string = MAPPER.writeValueAsString(data);return string;} catch (JsonProcessingException e) {e.printStackTrace();}return null;}/*** 將json結果集轉化為對象* * @param jsonData json數據* @param clazz 對象中的object類型* @return*/public static <T> T jsonToPojo(String jsonData, Class<T> beanType) {try {T t = MAPPER.readValue(jsonData, beanType);return t;} catch (Exception e) {e.printStackTrace();}return null;}/*** 將json數據轉換成pojo對象list* Title: jsonToList* Description: * @param jsonData* @param beanType* @return*/public static <T>List<T> jsonToList(String jsonData, Class<T> beanType) {JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List.class, beanType);try {List<T> list = MAPPER.readValue(jsonData, javaType);return list;} catch (Exception e) {e.printStackTrace();}return null;}}

PictureResult.java

package com.taotao.result; /*** 上傳圖片返回值* Title: PictureResult* Description: * Company: www.itcast.com * @author 入云龍* @date 2015年7月22日下午2:09:02* @version 1.0*/ public class PictureResult {/*** 上傳圖片返回值，成功：0 失敗：1 */private Integer error;/*** 回顯圖片使用的url*/private String url;/*** 錯誤時的錯誤消息*/private String message;public PictureResult(Integer state, String url) {this.url = url;this.error = state;}public PictureResult(Integer state, String url, String errorMessage) {this.url = url;this.error = state;this.message = errorMessage;}public Integer getError() {return error;}public void setError(Integer error) {this.error = error;}public String getUrl() {return url;}public void setUrl(String url) {this.url = url;}public String getMessage() {return message;}public void setMessage(String message) {this.message = message;} }

TaotaoResult.java

package com.taotao.result;import java.util.List;import com.fasterxml.jackson.databind.JsonNode; import com.fasterxml.jackson.databind.ObjectMapper;/*** 淘淘商城自定義響應結構*/ public class TaotaoResult implements Serializable{// 定義jackson對象private static final ObjectMapper MAPPER = new ObjectMapper();// 響應業務狀態private Integer status;// 響應消息private String msg;// 響應中的數據private Object data;public static TaotaoResult build(Integer status, String msg, Object data) {return new TaotaoResult(status, msg, data);}public static TaotaoResult ok(Object data) {return new TaotaoResult(data);}public static TaotaoResult ok() {return new TaotaoResult(null);}public TaotaoResult() {}public static TaotaoResult build(Integer status, String msg) {return new TaotaoResult(status, msg, null);}public TaotaoResult(Integer status, String msg, Object data) {this.status = status;this.msg = msg;this.data = data;}public TaotaoResult(Object data) {this.status = 200;this.msg = "OK";this.data = data;}// public Boolean isOK() { // return this.status == 200; // }public Integer getStatus() {return status;}public void setStatus(Integer status) {this.status = status;}public String getMsg() {return msg;}public void setMsg(String msg) {this.msg = msg;}public Object getData() {return data;}public void setData(Object data) {this.data = data;}/*** 將json結果集轉化為TaotaoResult對象* * @param jsonData json數據* @param clazz TaotaoResult中的object類型* @return*/public static TaotaoResult formatToPojo(String jsonData, Class<?> clazz) {try {if (clazz == null) {return MAPPER.readValue(jsonData, TaotaoResult.class);}JsonNode jsonNode = MAPPER.readTree(jsonData);JsonNode data = jsonNode.get("data");Object obj = null;if (clazz != null) {if (data.isObject()) {obj = MAPPER.readValue(data.traverse(), clazz);} else if (data.isTextual()) {obj = MAPPER.readValue(data.asText(), clazz);}}return build(jsonNode.get("status").intValue(), jsonNode.get("msg").asText(), obj);} catch (Exception e) {return null;}}/*** 沒有object對象的轉化* * @param json* @return*/public static TaotaoResult format(String json) {try {return MAPPER.readValue(json, TaotaoResult.class);} catch (Exception e) {e.printStackTrace();}return null;}/*** Object是集合轉化* * @param jsonData json數據* @param clazz 集合中的類型* @return*/public static TaotaoResult formatToList(String jsonData, Class<?> clazz) {try {JsonNode jsonNode = MAPPER.readTree(jsonData);JsonNode data = jsonNode.get("data");Object obj = null;if (data.isArray() && data.size() > 0) {obj = MAPPER.readValue(data.traverse(),MAPPER.getTypeFactory().constructCollectionType(List.class, clazz));}return build(jsonNode.get("status").intValue(), jsonNode.get("msg").asText(), obj);} catch (Exception e) {return null;}}}

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