整理收集的一些常用java工具类

1.json转换工具

1.package com.taotao.utils;3.import java.util.List;5.import com.fasterxml.jackson.core.JsonProcessingException;6.import com.fasterxml.jackson.databind.JavaType;7.import com.fasterxml.jackson.databind.JsonNode;8.import com.fasterxml.jackson.databind.ObjectMapper;10./**

11. * json转换工具类

12. */13.publicclassJsonUtils{15.// 定义jackson对象 16.privatestaticfinalObjectMapper MAPPER =newObjectMapper();18./** 19. * 将对象转换成json字符串。 20. *

Title: pojoToJson

21. *

Description:

22. *@paramdata 23. *@return24. */25.publicstaticString objectToJson(Object data) {26.try{27.String string = MAPPER.writeValueAsString(data);28.returnstring;29.}catch(JsonProcessingException e) {30.e.printStackTrace();31.}32.returnnull;33.}35./** 36. * 将json结果集转化为对象 37. * 38. *@paramjsonData json数据 39. *@paramclazz 对象中的object类型 40. *@return41. */42.publicstatic T jsonToPojo(String jsonData,ClassbeanType){43.try{44.T t = MAPPER.readValue(jsonData, beanType);45.returnt;46.}catch(Exceptione) {47.e.printStackTrace();48.}49.returnnull;50.}52./** 53. * 将json数据转换成pojo对象list 54. *

Title: jsonToList

55. *

Description:

56. *@paramjsonData 57. *@parambeanType 58. *@return59. */60.publicstaticList jsonToList(String jsonData,ClassbeanType){61.JavaType javaType = MAPPER.getTypeFactory().constructParametricType(List.class, beanType);62.try{63.Listlist= MAPPER.readValue(jsonData, javaType);64.returnlist;65.}catch(Exceptione) {66.e.printStackTrace();67.}69.returnnull;70.}72.}

2.cookie的读写

1.packagecom.taotao.common.utils;3.importjava.io.UnsupportedEncodingException;4.importjava.net.URLDecoder;5.importjava.net.URLEncoder;7.importjavax.servlet.http.Cookie;8.importjavax.servlet.http.HttpServletRequest;9.importjavax.servlet.http.HttpServletResponse;12./**

13. *

14. * Cookie 工具类

15. *

16. */17.publicfinalclassCookieUtils{19./** 20. * 得到Cookie的值, 不编码 21. * 22. *@paramrequest 23. *@paramcookieName 24. *@return25. */26.publicstaticStringgetCookieValue(HttpServletRequest request, String cookieName){27.returngetCookieValue(request, cookieName,false);28. }30./** 31. * 得到Cookie的值, 32. * 33. *@paramrequest 34. *@paramcookieName 35. *@return36. */37.publicstaticStringgetCookieValue(HttpServletRequest request, String cookieName,booleanisDecoder){38. Cookie[] cookieList = request.getCookies();39.if(cookieList ==null|| cookieName ==null) {40.returnnull;41. }42. String retValue =null;43.try{44.for(inti =0; i < cookieList.length; i++) {45.if(cookieList[i].getName().equals(cookieName)) {46.if(isDecoder) {47. retValue = URLDecoder.decode(cookieList[i].getValue(),"UTF-8");48. }else{49. retValue = cookieList[i].getValue();50. }51.break;52. }53. }54. }catch(UnsupportedEncodingException e) {55. e.printStackTrace();56. }57.returnretValue;58. }60./** 61. * 得到Cookie的值, 62. * 63. *@paramrequest 64. *@paramcookieName 65. *@return66. */67.publicstaticStringgetCookieValue(HttpServletRequest request, String cookieName, String encodeString){68. Cookie[] cookieList = request.getCookies();69.if(cookieList ==null|| cookieName ==null) {70.returnnull;71. }72. String retValue =null;73.try{74.for(inti =0; i < cookieList.length; i++) {75.if(cookieList[i].getName().equals(cookieName)) {76. retValue = URLDecoder.decode(cookieList[i].getValue(), encodeString);77.break;78. }79. }80. }catch(UnsupportedEncodingException e) {81. e.printStackTrace();82. }83.returnretValue;84. }86./**

87. * 设置Cookie的值不设置生效时间默认浏览器关闭即失效,也不编码

88. */89.publicstaticvoidsetCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,90.String cookieValue){91. setCookie(request, response, cookieName, cookieValue, -1);92. }94./**

95. * 设置Cookie的值在指定时间内生效,但不编码

96. */97.publicstaticvoidsetCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,98.String cookieValue,intcookieMaxage){99. setCookie(request, response, cookieName, cookieValue, cookieMaxage,false);100. }102./**

103. * 设置Cookie的值不设置生效时间,但编码

104. */105.publicstaticvoidsetCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,106.String cookieValue,booleanisEncode){107. setCookie(request, response, cookieName, cookieValue, -1, isEncode);108. }110./**

111. * 设置Cookie的值在指定时间内生效, 编码参数

112. */113.publicstaticvoidsetCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,114.String cookieValue,intcookieMaxage,booleanisEncode){115. doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, isEncode);116. }118./**

119. * 设置Cookie的值在指定时间内生效, 编码参数(指定编码)

120. */121.publicstaticvoidsetCookie(HttpServletRequest request, HttpServletResponse response, String cookieName,122.String cookieValue,intcookieMaxage, String encodeString){123. doSetCookie(request, response, cookieName, cookieValue, cookieMaxage, encodeString);124. }126./**

127. * 删除Cookie带cookie域名

128. */129.publicstaticvoiddeleteCookie(HttpServletRequest request, HttpServletResponse response,130.String cookieName){131. doSetCookie(request, response, cookieName,"", -1,false);132. }134./** 135. * 设置Cookie的值，并使其在指定时间内生效 136. * 137. *@paramcookieMaxage cookie生效的最大秒数 138. */139.privatestaticfinalvoiddoSetCookie(HttpServletRequest request, HttpServletResponse response,140.String cookieName, String cookieValue,intcookieMaxage,booleanisEncode){141.try{142.if(cookieValue ==null) {143. cookieValue ="";144. }elseif(isEncode) {145. cookieValue = URLEncoder.encode(cookieValue,"utf-8");146. }147. Cookie cookie =newCookie(cookieName, cookieValue);148.if(cookieMaxage >0)149. cookie.setMaxAge(cookieMaxage);150.if(null!= request) {// 设置域名的cookie 151. String domainName = getDomainName(request);152. System.out.println(domainName);153.if(!"localhost".equals(domainName)) {154. cookie.setDomain(domainName);155. }156. }157. cookie.setPath("/");158. response.addCookie(cookie);159. }catch(Exception e) {160. e.printStackTrace();161. }162. }164./** 165. * 设置Cookie的值，并使其在指定时间内生效 166. * 167. *@paramcookieMaxage cookie生效的最大秒数 168. */169.privatestaticfinalvoiddoSetCookie(HttpServletRequest request, HttpServletResponse response,170.String cookieName, String cookieValue,intcookieMaxage, String encodeString){171.try{172.if(cookieValue ==null) {173. cookieValue ="";174. }else{175. cookieValue = URLEncoder.encode(cookieValue, encodeString);176. }177. Cookie cookie =newCookie(cookieName, cookieValue);178.if(cookieMaxage >0)179. cookie.setMaxAge(cookieMaxage);180.if(null!= request) {// 设置域名的cookie 181. String domainName = getDomainName(request);182. System.out.println(domainName);183.if(!"localhost".equals(domainName)) {184. cookie.setDomain(domainName);185. }186. }187. cookie.setPath("/");188. response.addCookie(cookie);189. }catch(Exception e) {190. e.printStackTrace();191. }192. }194./**

195. * 得到cookie的域名

196. */197.privatestaticfinalStringgetDomainName(HttpServletRequest request){198. String domainName =null;200. String serverName = request.getRequestURL().toString();201.if(serverName ==null|| serverName.equals("")) {202. domainName ="";203. }else{204. serverName = serverName.toLowerCase();205. serverName = serverName.substring(7);206.finalintend = serverName.indexOf("/");207. serverName = serverName.substring(0, end);208.finalString[] domains = serverName.split("\\.");209.intlen = domains.length;210.if(len >3) {211.// www.xxx.com.cn 212. domainName ="."+ domains[len -3] +"."+ domains[len -2] +"."+ domains[len -1];213. }elseif(len <=3&& len >1) {214.// xxx.com or xxx.cn 215. domainName ="."+ domains[len -2] +"."+ domains[len -1];216. }else{217. domainName = serverName;218. }219. }221.if(domainName !=null&& domainName.indexOf(":") >0) {222. String[] ary = domainName.split("\\:");223. domainName = ary[0];224. }225.returndomainName;226. }228. }

3.HttpClientUtil

1.package com.taotao.utils;3.importjava.io.IOException;4.importjava.net.URI;5.importjava.util.ArrayList;6.importjava.util.List;7.importjava.util.Map;9.importorg.apache.http.NameValuePair;10.importorg.apache.http.client.entity.UrlEncodedFormEntity;11.importorg.apache.http.client.methods.CloseableHttpResponse;12.importorg.apache.http.client.methods.HttpGet;13.importorg.apache.http.client.methods.HttpPost;14.importorg.apache.http.client.utils.URIBuilder;15.importorg.apache.http.entity.ContentType;16.importorg.apache.http.entity.StringEntity;17.importorg.apache.http.impl.client.CloseableHttpClient;18.importorg.apache.http.impl.client.HttpClients;19.importorg.apache.http.message.BasicNameValuePair;20.importorg.apache.http.util.EntityUtils;22.publicclassHttpClientUtil{24.publicstaticStringdoGet(Stringurl,Map param) {26.// 创建Httpclient对象 27.CloseableHttpClient httpclient = HttpClients.createDefault();29.StringresultString ="";30.CloseableHttpResponse response =null;31.try{32.// 创建uri 33.URIBuilder builder =newURIBuilder(url);34.if(param !=null) {35.for(Stringkey : param.keySet()) {36.builder.addParameter(key, param.get(key));37.}38.}39.URI uri = builder.build();41.// 创建http GET请求 42.HttpGet httpGet =newHttpGet(uri);44.// 执行请求 45.response = httpclient.execute(httpGet);46.// 判断返回状态是否为200 47.if(response.getStatusLine().getStatusCode() ==200) {48.resultString = EntityUtils.toString(response.getEntity(),"UTF-8");49.}50.}catch(Exception e) {51.e.printStackTrace();52.}finally{53.try{54.if(response !=null) {55.response.close();56.}57.httpclient.close();58.}catch(IOException e) {59.e.printStackTrace();60.}61.}62.returnresultString;63.}65.publicstaticStringdoGet(Stringurl) {66.returndoGet(url,null);67.}69.publicstaticStringdoPost(Stringurl,Map param) {70.// 创建Httpclient对象 71.CloseableHttpClient httpClient = HttpClients.createDefault();72.CloseableHttpResponse response =null;73.StringresultString ="";74.try{75.// 创建Http Post请求 76.HttpPost httpPost =newHttpPost(url);77.// 创建参数列表 78.if(param !=null) {79.List paramList =newArrayList<>();80.for(Stringkey : param.keySet()) {81.paramList.add(newBasicNameValuePair(key, param.get(key)));82.}83.// 模拟表单 84.UrlEncodedFormEntity entity =newUrlEncodedFormEntity(paramList);85.httpPost.setEntity(entity);86.}87.// 执行http请求 88.response = httpClient.execute(httpPost);89.resultString = EntityUtils.toString(response.getEntity(),"utf-8");90.}catch(Exception e) {91.e.printStackTrace();92.}finally{93.try{94.response.close();95.}catch(IOException e) {96.// TODO Auto-generated catch block 97.e.printStackTrace();98.}99.}101.returnresultString;102.}104.publicstaticStringdoPost(Stringurl) {105.returndoPost(url,null);106.}108.publicstaticStringdoPostJson(Stringurl,Stringjson) {109.// 创建Httpclient对象 110.CloseableHttpClient httpClient = HttpClients.createDefault();111.CloseableHttpResponse response =null;112.StringresultString ="";113.try{114.// 创建Http Post请求 115.HttpPost httpPost =newHttpPost(url);116.// 创建请求内容 117.StringEntity entity =newStringEntity(json, ContentType.APPLICATION_JSON);118.httpPost.setEntity(entity);119.// 执行http请求 120.response = httpClient.execute(httpPost);121.resultString = EntityUtils.toString(response.getEntity(),"utf-8");122.}catch(Exception e) {123.e.printStackTrace();124.}finally{125.try{126.response.close();127.}catch(IOException e) {128.// TODO Auto-generated catch block 129.e.printStackTrace();130.}131.}133.returnresultString;134.}135.}

4.FastDFSClient工具类

1.packagecn.itcast.fastdfs.cliennt;3.importorg.csource.common.NameValuePair;4.importorg.csource.fastdfs.ClientGlobal;5.importorg.csource.fastdfs.StorageClient1;6.importorg.csource.fastdfs.StorageServer;7.importorg.csource.fastdfs.TrackerClient;8.importorg.csource.fastdfs.TrackerServer;10.publicclassFastDFSClient{12.privateTrackerClient trackerClient =null;13.privateTrackerServer trackerServer =null;14.privateStorageServer storageServer =null;15.privateStorageClient1 storageClient =null;17.publicFastDFSClient(String conf)throwsException{18.if(conf.contains("classpath:")) {19. conf = conf.replace("classpath:",this.getClass().getResource("/").getPath());20. }21. ClientGlobal.init(conf);22. trackerClient =newTrackerClient();23. trackerServer = trackerClient.getConnection();24. storageServer =null;25. storageClient =newStorageClient1(trackerServer, storageServer);26. }28./** 29. * 上传文件方法 30. *

Title: uploadFile

31. *

Description:

32. *@paramfileName 文件全路径 33. *@paramextName 文件扩展名，不包含（.） 34. *@parammetas 文件扩展信息 35. *@return36. *@throwsException 37. */38.publicStringuploadFile(String fileName, String extName, NameValuePair[] metas)throwsException{39. String result = storageClient.upload_file1(fileName, extName, metas);40.returnresult;41. }43.publicStringuploadFile(String fileName)throwsException{44.returnuploadFile(fileName,null,null);45. }47.publicStringuploadFile(String fileName, String extName)throwsException{48.returnuploadFile(fileName, extName,null);49. }51./** 52. * 上传文件方法 53. *

Title: uploadFile

54. *

Description:

55. *@paramfileContent 文件的内容，字节数组 56. *@paramextName 文件扩展名 57. *@parammetas 文件扩展信息 58. *@return59. *@throwsException 60. */61.publicStringuploadFile(byte[] fileContent, String extName, NameValuePair[] metas)throwsException{63. String result = storageClient.upload_file1(fileContent, extName, metas);64.returnresult;65. }67.publicStringuploadFile(byte[] fileContent)throwsException{68.returnuploadFile(fileContent,null,null);69. }71.publicStringuploadFile(byte[] fileContent, String extName)throwsException{72.returnuploadFile(fileContent, extName,null);73. }74. }

1.publicclassFastDFSTest{3.@Test4.publicvoid testFileUpload() throwsException{5.// 1、加载配置文件，配置文件中的内容就是tracker服务的地址。 6.ClientGlobal.init("D:/workspaces-itcast/term197/taotao-manager-web/src/main/resources/resource/client.conf");7.// 2、创建一个TrackerClient对象。直接new一个。 8.TrackerClient trackerClient =newTrackerClient();9.// 3、使用TrackerClient对象创建连接，获得一个TrackerServer对象。 10.TrackerServer trackerServer = trackerClient.getConnection();11.// 4、创建一个StorageServer的引用，值为null 12.StorageServer storageServer =null;13.// 5、创建一个StorageClient对象，需要两个参数TrackerServer对象、StorageServer的引用 14.StorageClient storageClient =newStorageClient(trackerServer, storageServer);15.// 6、使用StorageClient对象上传图片。 16.//扩展名不带“.” 17.String[] strings = storageClient.upload_file("D:/Documents/Pictures/images/200811281555127886.jpg","jpg",null);18.// 7、返回数组。包含组名和图片的路径。 19.for(String string : strings) {20.System.out.println(string);21.}22.}23.}# ![image](http://upload-images.jianshu.io/upload_images/2509688-45370c9d24b87e31?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

5.获取异常的堆栈信息

1.packagecom.taotao.utils;3.importjava.io.PrintWriter;4.importjava.io.StringWriter;6.publicclassExceptionUtil{8./** 9. * 获取异常的堆栈信息 10. * 11. *@paramt 12. *@return13. */14.publicstaticStringgetStackTrace(Throwable t){15. StringWriter sw =newStringWriter();16. PrintWriter pw =newPrintWriter(sw);18.try{19. t.printStackTrace(pw);20.returnsw.toString();21. }finally{22. pw.close();23. }24. }25. }

#6.easyUIDataGrid对象返回值

1.packagecom.taotao.result;3.importjava.util.List;5./** 6. * easyUIDataGrid对象返回值 7. *

Title: EasyUIResult

8. *

Description:

9. *

Company: www.itcast.com

10. *@author入云龙 11. *@date2015年7月21日下午4:12:52 12. *@version1.0 13. */14.publicclassEasyUIResult{16.privateInteger total;18.privateList rows;20.publicEasyUIResult(Integer total, List rows){21.this.total = total;22.this.rows = rows;23. }25.publicEasyUIResult(longtotal, List rows){26.this.total = (int) total;27.this.rows = rows;28. }30.publicIntegergetTotal(){31.returntotal;32. }33.publicvoidsetTotal(Integer total){34.this.total = total;35. }36.publicList getRows() {37.returnrows;38. }39.publicvoidsetRows(List rows){40.this.rows = rows;41. }44. }

7.ftp上传下载工具类

1.packagecom.taotao.utils;3.importjava.io.File;4.importjava.io.FileInputStream;5.importjava.io.FileNotFoundException;6.importjava.io.FileOutputStream;7.importjava.io.IOException;8.importjava.io.InputStream;9.importjava.io.OutputStream;11.importorg.apache.commons.net.ftp.FTP;12.importorg.apache.commons.net.ftp.FTPClient;13.importorg.apache.commons.net.ftp.FTPFile;14.importorg.apache.commons.net.ftp.FTPReply;16./** 17. * ftp上传下载工具类 18. *

Title: FtpUtil

19. *

Description:

20. *

Company: www.itcast.com

21. *@author入云龙 22. *@date2015年7月29日下午8:11:51 23. *@version1.0 24. */25.publicclassFtpUtil{27./** 28. * Description: 向FTP服务器上传文件 29. *@paramhost FTP服务器hostname 30. *@paramport FTP服务器端口 31. *@paramusername FTP登录账号 32. *@parampassword FTP登录密码 33. *@parambasePath FTP服务器基础目录 34. *@paramfilePath FTP服务器文件存放路径。例如分日期存放：/2015/01/01。文件的路径为basePath+filePath 35. *@paramfilename 上传到FTP服务器上的文件名 36. *@paraminput 输入流 37. *@return成功返回true，否则返回false 38. */39.publicstaticbooleanuploadFile(String host,intport, String username, String password, String basePath,40.String filePath, String filename, InputStream input){41.booleanresult =false;42. FTPClient ftp =newFTPClient();43.try{44.intreply;45. ftp.connect(host, port);// 连接FTP服务器 46.// 如果采用默认端口，可以使用ftp.connect(host)的方式直接连接FTP服务器 47. ftp.login(username, password);// 登录 48. reply = ftp.getReplyCode();49.if(!FTPReply.isPositiveCompletion(reply)) {50. ftp.disconnect();51.returnresult;52. }53.//切换到上传目录 54.if(!ftp.changeWorkingDirectory(basePath+filePath)) {55.//如果目录不存在创建目录 56. String[] dirs = filePath.split("/");57. String tempPath = basePath;58.for(String dir : dirs) {59.if(null== dir ||"".equals(dir))continue;60. tempPath +="/"+ dir;61.if(!ftp.changeWorkingDirectory(tempPath)) {62.if(!ftp.makeDirectory(tempPath)) {63.returnresult;64. }else{65. ftp.changeWorkingDirectory(tempPath);66. }67. }68. }69. }70.//设置上传文件的类型为二进制类型 71. ftp.setFileType(FTP.BINARY_FILE_TYPE);72.//上传文件 73.if(!ftp.storeFile(filename, input)) {74.returnresult;75. }76. input.close();77. ftp.logout();78. result =true;79. }catch(IOException e) {80. e.printStackTrace();81. }finally{82.if(ftp.isConnected()) {83.try{84. ftp.disconnect();85. }catch(IOException ioe) {86. }87. }88. }89.returnresult;90. }92./** 93. * Description: 从FTP服务器下载文件 94. *@paramhost FTP服务器hostname 95. *@paramport FTP服务器端口 96. *@paramusername FTP登录账号 97. *@parampassword FTP登录密码 98. *@paramremotePath FTP服务器上的相对路径 99. *@paramfileName 要下载的文件名 100. *@paramlocalPath 下载后保存到本地的路径 101. *@return102. */103.publicstaticbooleandownloadFile(String host,intport, String username, String password, String remotePath,104.String fileName, String localPath){105.booleanresult =false;106. FTPClient ftp =newFTPClient();107.try{108.intreply;109. ftp.connect(host, port);110.// 如果采用默认端口，可以使用ftp.connect(host)的方式直接连接FTP服务器 111. ftp.login(username, password);// 登录 112. reply = ftp.getReplyCode();113.if(!FTPReply.isPositiveCompletion(reply)) {114. ftp.disconnect();115.returnresult;116. }117. ftp.changeWorkingDirectory(remotePath);// 转移到FTP服务器目录 118. FTPFile[] fs = ftp.listFiles();119.for(FTPFile ff : fs) {120.if(ff.getName().equals(fileName)) {121. File localFile =newFile(localPath +"/"+ ff.getName());123. OutputStream is =newFileOutputStream(localFile);124. ftp.retrieveFile(ff.getName(), is);125. is.close();126. }127. }129. ftp.logout();130. result =true;131. }catch(IOException e) {132. e.printStackTrace();133. }finally{134.if(ftp.isConnected()) {135.try{136. ftp.disconnect();137. }catch(IOException ioe) {138. }139. }140. }141.returnresult;142. }144.publicstaticvoidmain(String[] args){145.try{146. FileInputStream in=newFileInputStream(newFile("D:\\temp\\image\\gaigeming.jpg"));147.booleanflag = uploadFile("192.168.25.133",21,"ftpuser","ftpuser","/home/ftpuser/www/images","/2015/01/21","gaigeming.jpg", in);148. System.out.println(flag);149. }catch(FileNotFoundException e) {150. e.printStackTrace();151. }152. }153. }

8.各种id生成策略

1.package com.taotao.utils;3.importjava.util.Random;5./**

6. * 各种id生成策略

7. *

Title: IDUtils

8. *

Description:

9. * @date 2015年7月22日下午2:32:10

10. * @version 1.0

11. */12.publicclassIDUtils{14./**

15. * 图片名生成

16. */17.publicstaticStringgenImageName(){18.//取当前时间的长整形值包含毫秒 19.longmillis = System.currentTimeMillis();20.//long millis = System.nanoTime(); 21.//加上三位随机数 22.Random random =newRandom();23.intend3 = random.nextInt(999);24.//如果不足三位前面补0 25.String str = millis + String.format("%03d", end3);27.returnstr;28.}30./**

31. * 商品id生成

32. */33.publicstaticlonggenItemId(){34.//取当前时间的长整形值包含毫秒 35.longmillis = System.currentTimeMillis();36.//long millis = System.nanoTime(); 37.//加上两位随机数 38.Random random =newRandom();39.intend2 = random.nextInt(99);40.//如果不足两位前面补0 41.String str = millis + String.format("%02d", end2);42.longid =newLong(str);43.returnid;44.}46.publicstaticvoidmain(String[] args){47.for(inti=0;i<100;i++)48.System.out.println(genItemId());49.}50.}

##9.上传图片返回值

1.package com.result;2./**

3. * 上传图片返回值

4. *

Title: PictureResult

5. *

Description:

6. *

Company: www.itcast.com

7. * @author 入云龙

8. * @date 2015年7月22日下午2:09:02

9. * @version 1.0

10. */11.publicclassPictureResult{13./**

14. * 上传图片返回值，成功：0 失败：1

15. */16.privateInteger error;17./**

18. * 回显图片使用的url

19. */20.privateString url;21./**

22. * 错误时的错误消息

23. */24.privateString message;25.publicPictureResult(Integer state, String url){26.this.url = url;27.this.error = state;28.}29.publicPictureResult(Integer state, String url, String errorMessage){30.this.url = url;31.this.error = state;32.this.message = errorMessage;33.}34.publicIntegergetError(){35.returnerror;36.}37.publicvoidsetError(Integer error){38.this.error = error;39.}40.publicStringgetUrl(){41.returnurl;42.}43.publicvoidsetUrl(String url){44.this.url = url;45.}46.publicStringgetMessage(){47.returnmessage;48.}49.publicvoidsetMessage(String message){50.this.message = message;51.}53.}

10.自定义响应结构

1.packagecom.result;3.importjava.util.List;5.importcom.fasterxml.jackson.databind.JsonNode;6.importcom.fasterxml.jackson.databind.ObjectMapper;8./**

9. * 自定义响应结构

10. */11.publicclassTaotaoResult{13.// 定义jackson对象 14.privatestaticfinalObjectMapper MAPPER =newObjectMapper();16.// 响应业务状态 17.privateInteger status;19.// 响应消息 20.privateString msg;22.// 响应中的数据 23.privateObject data;25.publicstaticTaotaoResultbuild(Integer status, String msg, Object data){26.returnnewTaotaoResult(status, msg, data);27. }29.publicstaticTaotaoResultok(Object data){30.returnnewTaotaoResult(data);31. }33.publicstaticTaotaoResultok(){34.returnnewTaotaoResult(null);35. }37.publicTaotaoResult(){39. }41.publicstaticTaotaoResultbuild(Integer status, String msg){42.returnnewTaotaoResult(status, msg,null);43. }45.publicTaotaoResult(Integer status, String msg, Object data){46.this.status = status;47.this.msg = msg;48.this.data = data;49. }51.publicTaotaoResult(Object data){52.this.status =200;53.this.msg ="OK";54.this.data = data;55. }57.// public Boolean isOK() { 58.// return this.status == 200; 59.// } 61.publicIntegergetStatus(){62.returnstatus;63. }65.publicvoidsetStatus(Integer status){66.this.status = status;67. }69.publicStringgetMsg(){70.returnmsg;71. }73.publicvoidsetMsg(String msg){74.this.msg = msg;75. }77.publicObjectgetData(){78.returndata;79. }81.publicvoidsetData(Object data){82.this.data = data;83. }85./** 86. * 将json结果集转化为TaotaoResult对象 87. * 88. *@paramjsonData json数据 89. *@paramclazz TaotaoResult中的object类型 90. *@return91. */92.publicstaticTaotaoResultformatToPojo(String jsonData, Class clazz){93.try{94.if(clazz ==null) {95.returnMAPPER.readValue(jsonData, TaotaoResult.class);96. }97. JsonNode jsonNode = MAPPER.readTree(jsonData);98. JsonNode data = jsonNode.get("data");99. Object obj =null;100.if(clazz !=null) {101.if(data.isObject()) {102. obj = MAPPER.readValue(data.traverse(), clazz);103. }elseif(data.isTextual()) {104. obj = MAPPER.readValue(data.asText(), clazz);105. }106. }107.returnbuild(jsonNode.get("status").intValue(), jsonNode.get("msg").asText(), obj);108. }catch(Exception e) {109.returnnull;110. }111. }113./** 114. * 没有object对象的转化 115. * 116. *@paramjson 117. *@return118. */119.publicstaticTaotaoResultformat(String json){120.try{121.returnMAPPER.readValue(json, TaotaoResult.class);122. }catch(Exception e) {123. e.printStackTrace();124. }125.returnnull;126. }128./** 129. * Object是集合转化 130. * 131. *@paramjsonData json数据 132. *@paramclazz 集合中的类型 133. *@return134. */135.publicstaticTaotaoResultformatToList(String jsonData, Class clazz){136.try{137. JsonNode jsonNode = MAPPER.readTree(jsonData);138. JsonNode data = jsonNode.get("data");139. Object obj =null;140.if(data.isArray() && data.size() >0) {141. obj = MAPPER.readValue(data.traverse(),142. MAPPER.getTypeFactory().constructCollectionType(List.class, clazz));143. }144.returnbuild(jsonNode.get("status").intValue(), jsonNode.get("msg").asText(), obj);145. }catch(Exception e) {146.returnnull;147. }148. }150. }

##11.jedis操作

1.package com.taotao.jedis;3.public interface JedisClient {5.Stringset(Stringkey,Stringvalue);6.Stringget(Stringkey);7.Booleanexists(Stringkey);8.Long expire(Stringkey, int seconds);9.Long ttl(Stringkey);10.Long incr(Stringkey);11.Long hset(Stringkey,Stringfield,Stringvalue);12.Stringhget(Stringkey,Stringfield);13.Long hdel(Stringkey,String... field);14.}

1.packagecom.taotao.jedis;3.importorg.springframework.beans.factory.annotation.Autowired;5.importredis.clients.jedis.JedisCluster;7.publicclassJedisClientClusterimplementsJedisClient{9.@Autowired10.privateJedisCluster jedisCluster;12.@Override13.publicStringset(String key, String value){14.returnjedisCluster.set(key, value);15. }17.@Override18.publicStringget(String key){19.returnjedisCluster.get(key);20. }22.@Override23.publicBooleanexists(String key){24.returnjedisCluster.exists(key);25. }27.@Override28.publicLongexpire(String key,intseconds){29.returnjedisCluster.expire(key, seconds);30. }32.@Override33.publicLongttl(String key){34.returnjedisCluster.ttl(key);35. }37.@Override38.publicLongincr(String key){39.returnjedisCluster.incr(key);40. }42.@Override43.publicLonghset(String key, String field, String value){44.returnjedisCluster.hset(key, field, value);45. }47.@Override48.publicStringhget(String key, String field){49.returnjedisCluster.hget(key, field);50. }52.@Override53.publicLonghdel(String key, String... field){54.returnjedisCluster.hdel(key, field);55. }57. }

1.packagecom.taotao.jedis;4.importorg.springframework.beans.factory.annotation.Autowired;7.importredis.clients.jedis.Jedis;8.importredis.clients.jedis.JedisPool;11.publicclassJedisClientPoolimplementsJedisClient{13.@Autowired14.privateJedisPool jedisPool;17.@Override18.publicStringset(String key, String value){19. Jedis jedis = jedisPool.getResource();20. String result = jedis.set(key, value);21. jedis.close();22.returnresult;23. }26.@Override27.publicStringget(String key){28. Jedis jedis = jedisPool.getResource();29. String result = jedis.get(key);30. jedis.close();31.returnresult;32. }35.@Override36.publicBooleanexists(String key){37. Jedis jedis = jedisPool.getResource();38. Boolean result = jedis.exists(key);39. jedis.close();40.returnresult;41. }44.@Override45.publicLongexpire(String key,intseconds){46. Jedis jedis = jedisPool.getResource();47. Long result = jedis.expire(key, seconds);48. jedis.close();49.returnresult;50. }53.@Override54.publicLongttl(String key){55. Jedis jedis = jedisPool.getResource();56. Long result = jedis.ttl(key);57. jedis.close();58.returnresult;59. }62.@Override63.publicLongincr(String key){64. Jedis jedis = jedisPool.getResource();65. Long result = jedis.incr(key);66. jedis.close();67.returnresult;68. }71.@Override72.publicLonghset(String key, String field, String value){73. Jedis jedis = jedisPool.getResource();74. Long result = jedis.hset(key, field, value);75. jedis.close();76.returnresult;77. }80.@Override81.publicStringhget(String key, String field){82. Jedis jedis = jedisPool.getResource();83. String result = jedis.hget(key, field);84. jedis.close();85.returnresult;86. }89.@Override90.publicLonghdel(String key, String... field){91. Jedis jedis = jedisPool.getResource();92. Long result = jedis.hdel(key, field);93. jedis.close();94.returnresult;95. }98. } 本文作者：[一个小迷糊][阅读原文]([http://click.aliyun.com/m/50526/]本文为云栖社区原创内容，未经允许不得转载。

整理收集的一些常用java工具类

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