本文主要是介绍java 常用工具类，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
1.UUID工具类
import java.util.UUID;
/*** UUID工具类* @author wbw**/
public class UUIDUtil {public static String uuid(){return UUID.randomUUID().toString().replaceAll("-", "");}}import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;import org.springframework.util.StringUtils;public class DateUtil {public static final String yyyy_MM_dd="yyyy-MM-dd";public static final String yyyy_MM_dd_ZN="yyyy 年 MM 月 dd 日";public static final String yyyy_MM_dd_ZN1="yyyy年MM月dd日";public static final String yyyy_MM_dd_ZN2="yyyy年M月d日";public static final String yyyy_MM_dd_HH="yyyy 年 MM 月 dd 日 HH 时";public static final String yyyy_MM_dd_HH_mm="yyyy 年 MM 月 dd 日 HH 时mm分";public static final String yyyy_MM_dd_HH_mm_ss="yyyy-MM-dd HH:mm:ss";public static final String HH_mm_ss="HH:mm:ss";public static final String YYYYMMDDHHMMSS = "yyyyMMddHHmmss";public static String dateToStr(String pattern){SimpleDateFormat sdf = new SimpleDateFormat(pattern);String str = sdf.format(new Date());return str;}public static String dateToStr(){return dateToStr(yyyy_MM_dd_HH_mm_ss);}public static String dateToStr(Date date){return dateToStr(date, yyyy_MM_dd);}public static String dateToStr(Date date,String pattern){if(date == null){return "";}SimpleDateFormat sdf = new SimpleDateFormat(pattern);String str = sdf.format(date);return str;}/*** 时间String转Date* @param date* @param pattern* @return* @throws ParseException * @throws Exception*/public static Date strToDate(String date,String pattern) throws ParseException{DateFormat format = new SimpleDateFormat(pattern); return format.parse(date); }/*** 时间String转Date* 默认 转化类型 yyyy-MM-dd* @param date* @return* @throws Exception*/public static Date strToDate(String date)throws Exception{return strToDate(date, yyyy_MM_dd);}/*** 得到当前时间* @return yyyy-MM-dd HH:mm:ss* @throws Exception*/public static Date getCurrDate() throws Exception{String dateStr = dateToStr(yyyy_MM_dd_HH_mm_ss);SimpleDateFormat sdf = new SimpleDateFormat(yyyy_MM_dd_HH_mm_ss);return sdf.parse(dateStr);}public static int getLastDayOfMonth(int year, int month) { Calendar cal = Calendar.getInstance(); cal.set(Calendar.YEAR, year); cal.set(Calendar.MONTH, month); return cal.getActualMaximum(Calendar.DATE);} public static int getFirstDayOfMonth(int year, int month) { Calendar cal = Calendar.getInstance(); cal.set(Calendar.YEAR, year); cal.set(Calendar.MONTH, month);return cal.getMinimum(Calendar.DATE);} /*** 比较两个日期* @param start* @param end* @return* start > end 则返回 1 * start = end 则返回 0 * start < end 则返回 -1 */public static int dateCompare(Date start, Date end) throws Exception{if(start == null && end == null){return 0;}if(start == null && end != null){return -1;}if(start != null && end == null){return 1;}Calendar cal= Calendar.getInstance();cal.setTime(start);Calendar ca2 = Calendar.getInstance();ca2.setTime(end);return cal.compareTo(ca2);}/*** 判断一个时间是否在一段时间内* @param start * @param date 比较的日期* @param end * @return* start <= date <= end 则返回 true* 其他则返回false*/public static boolean dateInTwoDays(Date start, Date date, Date end) throws Exception{if(start == null || end == null || date == null){return false;}Calendar ca1= Calendar.getInstance();ca1.setTime(start);Calendar ca2 = Calendar.getInstance();ca2.setTime(end);Calendar ca3= Calendar.getInstance();ca3.setTime(date);if( ca2.compareTo(ca1) > -1 && ca3.compareTo(ca1) > -1 && ca2.compareTo(ca3) > -1){return true;}return false;}/*** 得到当前月的最后一天* @return yyyy-MM-dd HH:mm:ss*/public static String getLastDayOfMonth() { Calendar cal = Calendar.getInstance(); String yearMonth = cal.get(Calendar.YEAR)+ "-";if((cal.get(Calendar.MONTH)+1) < 10){yearMonth += "0"+(cal.get(Calendar.MONTH)+1);}else{yearMonth += (cal.get(Calendar.MONTH)+1);}return yearMonth + "-" + cal.getActualMaximum(Calendar.DATE) + " 23:59:59";} /*** 得到当前月的第一天* @return yyyy-MM-dd HH:mm:ss*/public static String getFirstDayOfMonth() { Calendar cal = Calendar.getInstance(); String yearMonth = cal.get(Calendar.YEAR)+ "-";if((cal.get(Calendar.MONTH)+1) < 10){yearMonth += "0"+(cal.get(Calendar.MONTH)+1);}else{yearMonth += (cal.get(Calendar.MONTH)+1);}return yearMonth + "-01 00:00:00";} /*** 得到当前年* @return yyyy*/public static String getNowYear() { Calendar cal = Calendar.getInstance(); return cal.get(Calendar.YEAR) + "";} public static int getYearByDate(Date date) { Calendar cal = Calendar.getInstance(); cal.setTime(date);return cal.get(Calendar.YEAR);} /*** 得到当前月* @return mm*/public static String getNowMonth() { Calendar cal = Calendar.getInstance(); return cal.get(Calendar.MONTH) + "";} public static int getMonthByDate(Date date) { Calendar cal = Calendar.getInstance(); cal.setTime(date);return cal.get(Calendar.MONTH);} /*** 得到当前日* @return mm*/public static String getNowDay() { Calendar cal = Calendar.getInstance(); return cal.get(Calendar.DATE) + "";} public static int getDayByDate(Date date) { Calendar cal = Calendar.getInstance(); cal.setTime(date);return cal.get(Calendar.DATE);} /*** 根据年月日得到日期* @return mm*/public static Date getDate(int year,int month, int date) { Calendar cal = Calendar.getInstance(); cal.set(year, month, date);return cal.getTime();} /*** 计算两个日期将的天数* @param startDate* @param endDate* @return 天数*/public static int daysBetween(Date startDate, Date endDate) { try {if(startDate == null || endDate == null){return 0;}SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");startDate = sdf.parse(sdf.format(startDate));endDate = sdf.parse(sdf.format(endDate));Calendar cal = Calendar.getInstance(); cal.setTime(startDate); long time1 = cal.getTimeInMillis (); cal.setTime(endDate); long time2 = cal.getTimeInMillis (); long between_days=(time2-time1)/ (1000*3600*24);return Integer.parseInt(String.valueOf (between_days));} catch (Exception e) {e.printStackTrace();}return 0;} /*** 计算年龄* @param csrq 出生日期* @return*/public static int calculationAge(Date csrq) { try {if(csrq == null ){return 0;}SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");String csyear = sdf.format(csrq).substring(0, 4);String nowYear = getNowYear();return Integer.valueOf(nowYear) - Integer.valueOf(csyear);} catch (Exception e) {e.printStackTrace();}return 0;} /*** 验证开始时间是否小于结束时间* @param startDate* 开始时间* @param endDate* 结束时间* @throws Exception*/public static void checkTime(Date startDate, Date endDate) throws Exception {if(startDate==null){throw new RuntimeException("开始时间不能为空");}if(endDate==null){throw new RuntimeException("结束时间不能为空");}if(startDate.after(endDate)){throw new RuntimeException("开始时间不能大于结束时间");}}
}
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;public class SpringWebUtil {/*** 全局删除id标示*/public static String GLOB_DELETE_ID_VAL = "globDeleteIdVal";public static HttpServletRequest getRequest(){ServletRequestAttributes requestAttributes = (ServletRequestAttributes)RequestContextHolder.getRequestAttributes();return requestAttributes==null? null : requestAttributes.getRequest();}public static HttpSession getSession(){return getRequest().getSession(false);}public static String getRealRootPath(){return getRequest().getServletContext().getRealPath("/");}public static String getIp() {ServletRequestAttributes servletRequestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();if(servletRequestAttributes!=null){HttpServletRequest request = servletRequestAttributes.getRequest();return request.getRemoteAddr();}return null;}public static Object getSessionAttribute(String name){HttpServletRequest request = getRequest();return request == null?null:request.getSession().getAttribute(name);}public static void setSessionAttribute(String name,Object value){HttpServletRequest request = getRequest();if(request!=null){request.getSession().setAttribute(name, value); }}public static Object getRequestAttribute(String name){HttpServletRequest request = getRequest();return request == null?null:request.getAttribute(name);}public static void setRequestAttribute(String name,Object value){HttpServletRequest request = getRequest();if(request!=null){request.setAttribute(name, value); }}public static String getContextPath() {return getRequest().getContextPath();}public static void removeSessionAttribute(String name) {getRequest().getSession().removeAttribute(name);}}4.Bean工具类：
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.Arrays;
import java.util.List;import org.springframework.beans.BeansException;
import org.springframework.beans.FatalBeanException;
import org.springframework.util.Assert;public class BeanUtils extends org.springframework.beans.BeanUtils {public static void copyNotNullProperties(Object source, Object target){copyNotNullProperties(source, target,null,null);}public static void copyNotNullProperties(Object source, Object target, String...ignoreProperties)throws BeansException {copyNotNullProperties(source, target, null, ignoreProperties);}public static void copyNotNullProperties(Object source, Object target, Class<?> editable, String[] ignoreProperties){Assert.notNull(source, "Source must not be null");Assert.notNull(target, "Target must not be null");Class<?> actualEditable = target.getClass();if (editable != null) {if (!editable.isInstance(target)) {throw new IllegalArgumentException("Target class [" + target.getClass().getName() +"] not assignable to Editable class [" + editable.getName() + "]");}actualEditable = editable;}PropertyDescriptor[] targetPds = getPropertyDescriptors(actualEditable);List<String> ignoreList = (ignoreProperties != null) ? Arrays.asList(ignoreProperties) : null;for (PropertyDescriptor targetPd : targetPds) {if (targetPd.getWriteMethod() != null &&(ignoreProperties == null || (!ignoreList.contains(targetPd.getName())))) {PropertyDescriptor sourcePd = getPropertyDescriptor(source.getClass(), targetPd.getName());if (sourcePd != null && sourcePd.getReadMethod() != null) {try {Method readMethod = sourcePd.getReadMethod();if (!Modifier.isPublic(readMethod.getDeclaringClass().getModifiers())) {readMethod.setAccessible(true);}Object value = readMethod.invoke(source);if(value!=null){Method writeMethod = targetPd.getWriteMethod();if (!Modifier.isPublic(writeMethod.getDeclaringClass().getModifiers())) {writeMethod.setAccessible(true);}writeMethod.invoke(target, value);}}catch (Throwable ex) {throw new FatalBeanException("Could not copy properties from source to target", ex);}}}}}}
import java.util.Map;import org.springframework.cglib.beans.BeanGenerator;
import org.springframework.cglib.beans.BeanMap;public class CglibBeanUtil {/*** 实体Object*/public Object object = null;/*** 属性map*/ public BeanMap beanMap = null;public CglibBeanUtil() {}public CglibBeanUtil(Map<String,Class<?>> propertyMap) {this.object = generateBean(propertyMap);this.beanMap = BeanMap.create(this.object);}/*** 给bean属性赋值* @param property 属性名* @param value 值*/public void setValue(String property, Object value) {beanMap.put(property, value);}/*** 通过属性名得到属性值* @param property 属性名* @return 值*/public Object getValue(String property) {return beanMap.get(property);}/*** 得到该实体bean对象* @return*/public Object getObject() {return this.object;}private Object generateBean(Map<String,Class<?>> propertyMap) {BeanGenerator generator = new BeanGenerator();for (String key : propertyMap.keySet()) {generator.addProperty(key, propertyMap.get(key));}return generator.create();}
}
public class ExceptionUtil {/*** <p>* 将异常堆栈信息以字符串的格式返回* </p>* * @param e 异常对象* @return*/public static String createStackTrackMessage(Exception e) {StringBuffer messsage = new StringBuffer();if (e != null) {messsage.append(e.getClass()).append(": ").append(e.getMessage()).append("\n");StackTraceElement[] elements = e.getStackTrace();for (StackTraceElement stackTraceElement : elements) {messsage.append("\t").append(stackTraceElement.toString()).append("\n");}}return messsage.toString();}}<strong>
</strong>import javax.servlet.http.Cookie;import com.bjhy.platform.commons.consist.CommonConsist;public class CookieUtil {public static String getProperty(Cookie[] cookies, String name){if(cookies == null) return null;for (Cookie cookie : cookies) {if(cookie.getName().equals(name)){return cookie.getValue();}}return null;}public static String getAppToken(Cookie[] cookies){return getProperty(cookies, CommonConsist.TOKEN_COOKIE);}public static boolean containsPropery(Cookie[] cookies, String name){if(cookies == null) return false;for (Cookie cookie : cookies) {if(cookie.getName().equals(name)){return true;}}return false;}public static boolean containsAppToken(Cookie[] cookies){return containsPropery(cookies, CommonConsist.TOKEN_COOKIE);}}
package com.my.hibernate;import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;/*** hibernate4工具类* @author wbw**/
@SuppressWarnings("deprecation")
public class Hibernate4Util {private static final SessionFactory sessionFactory;/*** 初始化hibernate*/static{try{Configuration cfg = new Configuration().configure();ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(cfg.getProperties()).build();sessionFactory = cfg.buildSessionFactory(serviceRegistry);}catch (Throwable e){throw new ExceptionInInitializerError(e);}}private Hibernate4Util(){}/*** 获取开着的session* @return*/public static Session getSession(){//*openSession必须关闭，currentSession在事务结束后自动关闭// *openSession没有和当前线程绑定，currentSession和当前线程绑定
// return sessionFactory.openSession();return sessionFactory.getCurrentSession();}/*** 关闭sessionFactory*/public static void closeSession(){sessionFactory.close();}/*** 获取SessionFactory* @return*/public static SessionFactory getSessionFactory() {return sessionFactory;}}package com.my.hibernate;import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;/*** hibernate4工具类* @author wbw**/
@SuppressWarnings("deprecation")
public class Hibernate3Util {private static final SessionFactory sessionFactory;/*** 初始化hibernate*/static{try{ //此方法已经过时sessionFactory = new Configuration().configure().buildSessionFactory();}catch (Throwable e){throw new ExceptionInInitializerError(e);}}private Hibernate3Util(){}/*** 获取开着的session* @return*/public static Session getSession(){//*openSession必须关闭，currentSession在事务结束后自动关闭// *openSession没有和当前线程绑定，currentSession和当前线程绑定
// return sessionFactory.openSession();return sessionFactory.getCurrentSession();}/*** 关闭sessionFactory*/public static void closeSession(){sessionFactory.close();}/*** 获取SessionFactory* @return*/public static SessionFactory getSessionFactory() {return sessionFactory;}}/*** 日志对象* @author wbw**/
public class LoggerUtils {/*** log对象*/private static org.apache.log4j.Logger log = org.apache.log4j.Logger.getRootLogger();/*** 日志信息* @param message 输出信息*/final public static void info(Object message) {log.info(message);}/*** 调试信息* @param message 输出信息*/final public static void debug(Object message) {log.debug(message);}/*** 错误信息* @param message 输出信息*/final public static void error(Object message) {log.error(message);}/*** 警告信息* @param message 输出信息*/final public static void warn(Object message) {log.warn(message);}/*** 严重错误信息* @param message 输出信息*/final public static void fatal(Object message) {log.fatal(message);}}
import java.math.BigDecimal;
/***/
public class Arith { // 默认除法运算精度/*** DEF_DIV_SCALE*/private static final int DEF_DIV_SCALE = 10; // 这个类不能实例化/*** scaleStr*/private static String scaleStr = "小数位数必须为大于等于0的正整数";/*** 提供精确的加法运算。* * @param v1* 被加数* @param v2* 加数* @return 两个参数的和*/public static double add(double v1, double v2) {BigDecimal b1 = new BigDecimal(Double.toString(v1));BigDecimal b2 = new BigDecimal(Double.toString(v2));return b1.add(b2).doubleValue();}/*** 提供精确的减法运算。* * @param v1* 被减数* @param v2* 减数* @return 两个参数的差*/public static double sub(double v1, double v2) {BigDecimal b1 = new BigDecimal(Double.toString(v1));BigDecimal b2 = new BigDecimal(Double.toString(v2));return b1.subtract(b2).doubleValue();}/*** 提供精确的乘法运算。* * @param v1* 被乘数* @param v2* 乘数* @return 两个参数的积*/public static double mul(double v1, double v2) {BigDecimal b1 = new BigDecimal(Double.toString(v1));BigDecimal b2 = new BigDecimal(Double.toString(v2));return b1.multiply(b2).doubleValue();}/*** 提供（相对）精确的除法运算，当发生除不尽的情况时，精确到 小数点以后10位，以后的数字四舍五入。* * @param v1* 被除数* @param v2* 除数* @return 两个参数的商*/public static double div(double v1, double v2) {return div(v1, v2, DEF_DIV_SCALE);}/*** 提供（相对）精确的除法运算。当发生除不尽的情况时，由scale参数指 定精度，以后的数字四舍五入。* * @param v1* 被除数* @param v2* 除数* @param scale* 表示表示需要精确到小数点以后几位。* @return 两个参数的商*/public static double div(double v1, double v2, int scale) {if (scale < 0) {throw new IllegalArgumentException(scaleStr);}BigDecimal b1 = new BigDecimal(Double.toString(v1));BigDecimal b2 = new BigDecimal(Double.toString(v2));return b1.divide(b2, scale, BigDecimal.ROUND_HALF_UP).doubleValue();}/*** 提供精确的小数位四舍五入处理。* * @param v* 需要四舍五入的数字* @param scale* 小数点后保留几位* @return 四舍五入后的结果*/public static double round(double v, int scale) {if (scale < 0) {throw new IllegalArgumentException(scaleStr);}BigDecimal b = new BigDecimal(Double.toString(v));BigDecimal one = new BigDecimal("1");return b.divide(one, scale, BigDecimal.ROUND_HALF_UP).doubleValue();}/*** 对eval对象进行精度和小数位数控制* @param object object* @param scale scale* @return double*/public static double roundForEval(Object object, int scale) {if (scale < 0) { throw new IllegalArgumentException(scaleStr);}return round(Double.valueOf(object.toString()), scale);}/*** double类型转String 类型的小数点后的00* @param num double参数* @return String 类型*/public static String doubleTransform(double num){ String strNum = num+"";int a = strNum.indexOf(".");if(a>0){//获取小数点后面的数字String dianAfter = strNum.substring(a+1);if("0".equals(dianAfter)){return strNum+"0";}else{if(dianAfter.length()==1){return strNum +"0";}else{return strNum;}}}else{return strNum+".00";}}};11.File工具类，主要是用于存储数据到文件中,删除文件数据等操作
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.StringReader;import org.apache.commons.io.FileUtils;
import org.apache.commons.io.filefilter.AndFileFilter;
import org.apache.commons.io.filefilter.DirectoryFileFilter;
import org.apache.commons.io.filefilter.IOFileFilter;
import org.apache.commons.io.filefilter.NotFileFilter;
import org.apache.commons.io.filefilter.SuffixFileFilter;
import org.apache.log4j.Logger;public class FileUtil {private static Logger logger = Logger.getLogger(FileUtil.class);public static boolean string2File(String res, String filePath) {boolean flag = true;BufferedReader bufferedReader = null;BufferedWriter bufferedWriter = null;try {File distFile = new File(filePath);if (!distFile.getParentFile().exists()) {distFile.getParentFile().mkdirs();}bufferedReader = new BufferedReader(new StringReader(res));bufferedWriter = new BufferedWriter(new FileWriter(distFile));char[] buf = new char[1024];int len;while ((len = bufferedReader.read(buf)) != -1) {bufferedWriter.write(buf, 0, len);}bufferedWriter.flush();bufferedReader.close();bufferedWriter.close();} catch (IOException e) {flag = false;logger.error("将字符串填充到文件失败", e);}return flag;}public static void copyFile(String resFilePath, String distFolder)throws IOException {File resFile = new File(resFilePath);File distFile = new File(distFolder);if (resFile.isDirectory()) {FileUtils.copyDirectoryToDirectory(resFile, distFile);} else if (resFile.isFile()) {FileUtils.copyFileToDirectory(resFile, distFile, true);}}public static void deleteFile(String targetPath) throws IOException {File targetFile = new File(targetPath);if (targetFile.isDirectory()) {FileUtils.deleteDirectory(targetFile);} else if (targetFile.isFile()) {targetFile.delete();}}public static void moveFile(String resFilePath, String distFolder)throws IOException {File resFile = new File(resFilePath);File distFile = new File(distFolder);if (resFile.isDirectory()) {FileUtils.copyDirectory(resFile, distFile, true);} else if (resFile.isFile()) {FileUtils.copyDirectory(resFile, distFile, true);}}public static long genFileSize(String distFilePath) {File distFile = new File(distFilePath);if (distFile.isFile()) {return distFile.length();}if (distFile.isDirectory()) {return FileUtils.sizeOfDirectory(distFile);}return -1L;}public static boolean isExist(String filePath) {return new File(filePath).exists();}public static String[] listFilebySuffix(String folder, String suffix) {IOFileFilter fileFilter1 = new SuffixFileFilter(suffix);IOFileFilter fileFilter2 = new NotFileFilter(DirectoryFileFilter.INSTANCE);FilenameFilter filenameFilter = new AndFileFilter(fileFilter1,fileFilter2);return new File(folder).list(filenameFilter);}
}
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Locale;
import java.util.Properties;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.TreeSet;public abstract class StringUtils extends org.apache.commons.lang.StringUtils{private static final String FOLDER_SEPARATOR = "/";private static final String WINDOWS_FOLDER_SEPARATOR = "\\";private static final String TOP_PATH = "..";private static final String CURRENT_PATH = ".";private static final char EXTENSION_SEPARATOR = '.';public static String[] addStringToArray(String[] array, String str) {if ((array == null) || (array.length < 0)) {return new String[] { str };}String[] newArr = new String[array.length + 1];System.arraycopy(array, 0, newArr, 0, array.length);newArr[array.length] = str;return newArr;}public static String applyRelativePath(String path, String relativePath) {int separatorIndex = path.lastIndexOf("/");if (separatorIndex != -1) {String newPath = path.substring(0, separatorIndex);if (!relativePath.startsWith("/")) {newPath = newPath + "/";}return newPath + relativePath;}return relativePath;}public static String arrayToCommaDelimitedString(Object[] arr) {return arrayToDelimitedString(arr, ",");}public static String arrayToDelimitedString(Object[] arr, String delim) {if (arr == null) {return "";}StringBuffer sb = new StringBuffer();for (int i = 0; i < arr.length; i++) {if (i > 0) {sb.append(delim);}sb.append(arr[i]);}return sb.toString();}public static String capitalize(String str) {return changeFirstCharacterCase(str, true);}private static String changeFirstCharacterCase(String str,boolean capitalize) {if ((str == null) || (str.length() == 0)) {return str;}StringBuffer buf = new StringBuffer(str.length());if (capitalize) {buf.append(Character.toUpperCase(str.charAt(0)));} else {buf.append(Character.toLowerCase(str.charAt(0)));}buf.append(str.substring(1));return buf.toString();}public static String cleanPath(String path) {String pathToUse = replace(path, "\\", "/");int prefixIndex = pathToUse.indexOf(":");String prefix = "";if (prefixIndex != -1) {prefix = pathToUse.substring(0, prefixIndex + 1);pathToUse = pathToUse.substring(prefixIndex + 1);}String[] pathArray = delimitedListToStringArray(pathToUse, "/");List pathElements = new LinkedList();int tops = 0;for (int i = pathArray.length - 1; i >= 0; i--) {if (!".".equals(pathArray[i])) {if ("..".equals(pathArray[i])) {tops++;} else if (tops > 0) {tops--;} else {pathElements.add(0, pathArray[i]);}}}for (int i = 0; i < tops; i++) {pathElements.add(0, "..");}return prefix + collectionToDelimitedString(pathElements, "/");}public static String collectionToCommaDelimitedString(Collection coll) {return collectionToDelimitedString(coll, ",");}public static String collectionToDelimitedString(Collection coll,String delim) {return collectionToDelimitedString(coll, delim, "", "");}public static String collectionToDelimitedString(Collection coll,String delim, String prefix, String suffix) {if (coll == null) {return "";}StringBuffer sb = new StringBuffer();Iterator it = coll.iterator();int i = 0;while (it.hasNext()) {if (i > 0) {sb.append(delim);}sb.append(prefix).append(it.next()).append(suffix);i++;}return sb.toString();}public static Set commaDelimitedListToSet(String str) {Set set = new TreeSet();String[] tokens = commaDelimitedListToStringArray(str);for (String element : tokens) {set.add(element);}return set;}public static String[] commaDelimitedListToStringArray(String str) {return delimitedListToStringArray(str, ",");}public static int countOccurrencesOf(String str, String sub) {if ((str == null) || (sub == null) || (str.length() == 0)|| (sub.length() == 0)) {return 0;}int count = 0;int pos = 0;int idx = 0;while ((idx = str.indexOf(sub, pos)) != -1) {count++;pos = idx + sub.length();}return count;}public static String delete(String inString, String pattern) {return replace(inString, pattern, "");}public static String deleteAny(String inString, String charsToDelete) {if ((inString == null) || (charsToDelete == null)) {return inString;}StringBuffer out = new StringBuffer();for (int i = 0; i < inString.length(); i++) {char c = inString.charAt(i);if (charsToDelete.indexOf(c) == -1) {out.append(c);}}return out.toString();}public static String[] delimitedListToStringArray(String str,String delimiter) {if (str == null) {return new String[0];}if (delimiter == null) {return new String[] { str };}List result = new ArrayList();if ("".equals(delimiter)) {for (int i = 0; i < str.length(); i++) {result.add(str.substring(i, i + 1));}} else {int pos = 0;int delPos = 0;while ((delPos = str.indexOf(delimiter, pos)) != -1) {result.add(str.substring(pos, delPos));pos = delPos + delimiter.length();}if ((str.length() > 0) && (pos <= str.length())) {result.add(str.substring(pos));}}return toStringArray(result);}public static boolean endsWithIgnoreCase(String str, String suffix) {if ((str == null) || (suffix == null)) {return false;}if (str.endsWith(suffix)) {return true;}if (str.length() < suffix.length()) {return false;}String lcStr = str.substring(str.length() - suffix.length()).toLowerCase();String lcSuffix = suffix.toLowerCase();return lcStr.equals(lcSuffix);}public static String getFilename(String path) {if (path == null) {return null;}int separatorIndex = path.lastIndexOf("/");return separatorIndex != -1 ? path.substring(separatorIndex + 1) : path;}public static String getFilenameExtension(String path) {if (path == null) {return null;}int sepIndex = path.lastIndexOf('.');return sepIndex != -1 ? path.substring(sepIndex + 1) : null;}public static boolean hasLength(String str) {return (str != null) && (str.length() > 0);}public static boolean hasText(String str) {int strLen;if ((str == null) || ((strLen = str.length()) == 0)) {return false;}for (int i = 0; i < strLen; i++) {if (!Character.isWhitespace(str.charAt(i))) {return true;}}return false;}public static Locale parseLocaleString(String localeString) {String[] parts = tokenizeToStringArray(localeString, "_ ", false, false);String language = parts.length > 0 ? parts[0] : "";String country = parts.length > 1 ? parts[1] : "";String variant = parts.length > 2 ? parts[2] : "";return language.length() > 0 ? new Locale(language, country, variant): null;}public static boolean pathEquals(String path1, String path2) {return cleanPath(path1).equals(cleanPath(path2));}public static String quote(String str) {return str != null ? "'" + str + "'" : null;}public static Object quoteIfString(Object obj) {return (obj instanceof String) ? quote((String) obj) : obj;}public static String[] removeDuplicateStrings(String[] array) {if ((array == null) || (array.length < 0)) {return array;}Set set = new TreeSet();String[] arrayOfString = array;int j = array.length;for (int i = 0; i < j; i++) {String element = arrayOfString[i];set.add(element);}return toStringArray(set);}public static String replace(String inString, String oldPattern,String newPattern) {if (inString == null) {return null;}if ((oldPattern == null) || (newPattern == null)) {return inString;}StringBuffer sbuf = new StringBuffer();int pos = 0;int index = inString.indexOf(oldPattern);int patLen = oldPattern.length();while (index >= 0) {sbuf.append(inString.substring(pos, index));sbuf.append(newPattern);pos = index + patLen;index = inString.indexOf(oldPattern, pos);}sbuf.append(inString.substring(pos));return sbuf.toString();}public static String[] sortStringArray(String[] array) {if ((array == null) || (array.length < 0)) {return new String[0];}Arrays.sort(array);return array;}public static String[] split(String toSplit, String delimiter) {if ((!hasLength(toSplit)) || (!hasLength(delimiter))) {return null;}int offset = toSplit.indexOf(delimiter);if (offset < 0) {return null;}String beforeDelimiter = toSplit.substring(0, offset);String afterDelimiter = toSplit.substring(offset + delimiter.length());return new String[] { beforeDelimiter, afterDelimiter };}public static Properties splitArrayElementsIntoProperties(String[] array,String delimiter) {return splitArrayElementsIntoProperties(array, delimiter, null);}public static Properties splitArrayElementsIntoProperties(String[] array,String delimiter, String charsToDelete) {if ((array == null) || (array.length == 0)) {return null;}Properties result = new Properties();String[] arrayOfString1 = array;int j = array.length;for (int i = 0; i < j; i++) {String element = arrayOfString1[i];if (charsToDelete != null) {element = deleteAny(element, charsToDelete);}String[] splittedElement = split(element, delimiter);if (splittedElement != null) {result.setProperty(splittedElement[0].trim(),splittedElement[1].trim());}}return result;}public static boolean startsWithIgnoreCase(String str, String prefix) {if ((str == null) || (prefix == null)) {return false;}if (str.startsWith(prefix)) {return true;}if (str.length() < prefix.length()) {return false;}String lcStr = str.substring(0, prefix.length()).toLowerCase();String lcPrefix = prefix.toLowerCase();return lcStr.equals(lcPrefix);}public static String stripFilenameExtension(String path) {if (path == null) {return null;}int sepIndex = path.lastIndexOf('.');return sepIndex != -1 ? path.substring(0, sepIndex) : path;}public static String[] tokenizeToStringArray(String str, String delimiters) {return tokenizeToStringArray(str, delimiters, true, true);}public static String[] tokenizeToStringArray(String str, String delimiters,boolean trimTokens, boolean ignoreEmptyTokens) {if (str == null) {return new String[0];}StringTokenizer st = new StringTokenizer(str, delimiters);List tokens = new ArrayList();while (st.hasMoreTokens()) {String token = st.nextToken();if (trimTokens) {token = token.trim();}if ((!ignoreEmptyTokens) || (token.length() > 0)) {tokens.add(token);}}return toStringArray(tokens);}public static String[] toStringArray(Collection collection) {if (collection == null) {return null;}return (String[]) collection.toArray(new String[collection.size()]);}public static String trimLeadingWhitespace(String str) {if (!hasLength(str)) {return str;}StringBuffer buf = new StringBuffer(str);while ((buf.length() > 0) && (Character.isWhitespace(buf.charAt(0)))) {buf.deleteCharAt(0);}return buf.toString();}public static String trimTrailingWhitespace(String str) {if (!hasLength(str)) {return str;}StringBuffer buf = new StringBuffer(str);while ((buf.length() > 0)&& (Character.isWhitespace(buf.charAt(buf.length() - 1)))) {buf.deleteCharAt(buf.length() - 1);}return buf.toString();}public static String trimWhitespace(String str) {if (!hasLength(str)) {return str;}StringBuffer buf = new StringBuffer(str);do {buf.deleteCharAt(0);if (buf.length() <= 0) {break;}} while (Character.isWhitespace(buf.charAt(0)));while ((buf.length() > 0)&& (Character.isWhitespace(buf.charAt(buf.length() - 1)))) {buf.deleteCharAt(buf.length() - 1);}return buf.toString();}public static String uncapitalize(String str) {return changeFirstCharacterCase(str, false);}public static String unqualify(String qualifiedName) {return unqualify(qualifiedName, '.');}public static String unqualify(String qualifiedName, char separator) {return qualifiedName.substring(qualifiedName.lastIndexOf(separator) + 1);}
}import java.io.File;
import java.util.Date;
import java.util.Properties;import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeUtility;import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;/*** 邮件工具类* * @author chenjun* */
public class EmailUtil {private JavaMailSender javaMailSender;private String username;public EmailUtil(String host, int port, String username, String password) {this.username = username;JavaMailSenderImpl javaMailSenderImpl = new JavaMailSenderImpl();javaMailSenderImpl.setHost(host);javaMailSenderImpl.setPort(port);javaMailSenderImpl.setUsername(username);javaMailSenderImpl.setPassword(password);Properties javaMailProperties = new Properties();javaMailProperties.put("mail.smtp.auth", true);javaMailProperties.put("prop", true);javaMailProperties.put("mail.smtp.timeout", 25000);javaMailSenderImpl.setJavaMailProperties(javaMailProperties);javaMailSender = javaMailSenderImpl;}/*** 发送文本内容* * @param to* 目标邮箱* @param subject* 主题* @param body* 内容*/public void sendContent(String to, String subject, String body) {SimpleMailMessage simpleMessage = new SimpleMailMessage();simpleMessage.setFrom(username);// 发送人名片simpleMessage.setTo(to);// 收件人邮箱simpleMessage.setSubject(subject);// 邮件主题simpleMessage.setSentDate(new Date());// 邮件发送时间simpleMessage.setText(body);javaMailSender.send(simpleMessage);}/*** 发送文本内容，带附件* * @param to* 目标邮箱* @param subject* 主题* @param body* 内容* @param file*/public void sendContent(String to, String subject, String body, File file) {sendContent(to, subject, body, new File[] { file });}/*** 发送文本内容,带附件* * @param to* 目标邮箱* @param subject* 主题* @param body* 内容*/public void sendContent(String to, String subject, String body, File[] files) {if (files == null || files.length == 0) {sendContent(to, subject, body);} else {try {MimeMessage mimeMessage = javaMailSender.createMimeMessage();MimeMessageHelper helper = new MimeMessageHelper(mimeMessage,true, "UTF-8");helper.setFrom(username);helper.setTo(to);helper.setSubject(subject);helper.setText(body, true);helper.setSentDate(new Date());for (int i = 0; i < files.length; i++) {helper.addAttachment(MimeUtility.encodeText(files[i].getName()),files[i]);}javaMailSender.send(mimeMessage);} catch (Exception e) {e.printStackTrace();}}}}import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;import net.sourceforge.pinyin4j.PinyinHelper;
import net.sourceforge.pinyin4j.format.HanyuPinyinCaseType;
import net.sourceforge.pinyin4j.format.HanyuPinyinOutputFormat;
import net.sourceforge.pinyin4j.format.HanyuPinyinToneType;
import net.sourceforge.pinyin4j.format.HanyuPinyinVCharType;import org.apache.commons.lang.StringUtils;/*** @className:PinyingUtil.java* @classDescription:拼音操作工具类*/
public class PinYinUtil {private static final String DEFAULT_SEPARATOR = "";private static final String SPACE_SEPARATOR = " ";static HanyuPinyinOutputFormat outputFormat = new HanyuPinyinOutputFormat();static{outputFormat.setCaseType(HanyuPinyinCaseType.LOWERCASE);outputFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);outputFormat.setVCharType(HanyuPinyinVCharType.WITH_V);}public PinYinUtil() {}/*** 根据汉字返回全拼和简拼的集合，默认用空格分隔* @param hanyu* @return* @throws Exception*/public static Set<String> hanyuToPyAndJp(String hanyu)throws Exception{return hanyuToPyAndJp(hanyu, DEFAULT_SEPARATOR);}/*** 根据汉字返回全拼和简拼的集合，按指定分隔符分隔* @param hanyu* @param separator* @return* @throws Exception*/public static Set<String> hanyuToPyAndJp(String hanyu, String separator)throws Exception {Set<String> resultSet = hanyuToPy(hanyu, separator);separator = " ";Set<String> resultSet2 = hanyuToPy(hanyu, " ");for (String pinyin : resultSet2) {String[] items = pinyin.split(separator);StringBuffer sb = new StringBuffer();for (String item : items) {sb.append(item.substring(0, 1));}resultSet.add(sb.toString());}return resultSet;}/*** 根据汉字返回简拼的集合* @param hanyu* @return* @throws Exception*/public static Set<String> hanyuToJp(String hanyu) throws Exception {String separator = " ";Set<String> resultSet = hanyuToPy(hanyu,separator);Set<String> jpSet = new HashSet<String>();for (String pinyin : resultSet) {String[] items = pinyin.split(separator);StringBuffer sb = new StringBuffer();for (String item : items) {sb.append(item.substring(0, 1));}jpSet.add(sb.toString());}return jpSet;}/*** 根据汉字返回简拼的集合字符串，默认空格关联比如 ab bd* @param hanyu* @return* @throws Exception*/public static String hanyuToJpStr(String hanyu) throws Exception {return hanyuToJpStr(hanyu, " ");}/*** 根据汉字返回简拼的集合字符串，按照指定关联符进行关联比如 ab,bd* @param hanyu* @param join* @return* @throws Exception*/public static String hanyuToJpStr(String hanyu,String join) throws Exception {String separator = " ";Set<String> resultSet = hanyuToPy(hanyu,separator);StringBuffer result = new StringBuffer();Set<String> jpSet = new HashSet<String>();for (String pinyin : resultSet) {String[] items = pinyin.split(separator);StringBuffer sb = new StringBuffer();for (String item : items) {if(StringUtils.isNotEmpty(item))sb.append(item.substring(0, 1));}jpSet.add(sb.toString());}for (String jp : jpSet) {result.append(jp).append(join);}return result.toString().trim();}/*** 根据汉字返回拼音的集合* @param hanyu* @return* @throws Exception*/public static Set<String> hanyuToPy(String hanyu)throws Exception {return hanyuToPy(hanyu, DEFAULT_SEPARATOR);}/*** 根据汉字返回拼音的集合字符串,默认空格关联比如 ab bd* @param hanyu* @return* @throws Exception*/public static String hanyuToPyStr(String hanyu) throws Exception{return hanyuToPyStr(hanyu, DEFAULT_SEPARATOR, SPACE_SEPARATOR);}public static String hanyuToPyStr(String hanyu,String separator,String dySeparator) throws Exception{Set<String> set = hanyuToPy(hanyu, separator);StringBuffer sb = new StringBuffer();for (String dy : set) {sb.append(dy).append(dySeparator);}if(set.size()>0){int index = sb.lastIndexOf(dySeparator);sb.replace(index, sb.length(), "");}return sb.toString();}public static Set<String> hanyuToPy(String hanyu, String separator)throws Exception {List<String[]> list = new ArrayList<String[]>();Set<String> resultSet = new HashSet<String>();if(StringUtils.isEmpty(hanyu))return resultSet;for (int i = 0; i < hanyu.length(); i++) {String[] pinyinArray = null;char chineseChar = hanyu.charAt(i);if (isHanzi(chineseChar)) {pinyinArray = PinyinHelper.toHanyuPinyinStringArray(chineseChar, outputFormat);} else {pinyinArray = new String[] { chineseChar + DEFAULT_SEPARATOR };}if(pinyinArray!=null){list.add(pinyinArray);}}buildItem(list, 0, DEFAULT_SEPARATOR, separator, resultSet);return resultSet;}protected static boolean isHanzi(char oneChar) {if ((oneChar >= '\u4e00' && oneChar <= '\u9fa5')|| (oneChar >= '\uf900' && oneChar <= '\ufa2d')) {return true;}return false;}private static void buildItem(List<String[]> list, int index, String sb,String separator, Set<String> resultSet) {if (index == list.size()) {if (StringUtils.isNotEmpty(sb)) {if (StringUtils.isNotEmpty(separator)) {resultSet.add(sb.substring(1));} else {resultSet.add(sb);}}return;}String[] items = list.get(index);for (String item : items) {buildItem(list, index + 1, sb + separator + item, separator,resultSet);}}}import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;/*** @Description 文件压缩解压* @author wbw*/
public class ZipFileUtil {/*** 解压文件* @param zipFile* 解压文件对象* @param descDir* 解压到的目录* @throws Exception*/public static void unZipFile(File zipFile,String descDir)throws Exception{ int len = -1;File pathFile = new File(descDir);if(!pathFile.exists())pathFile.mkdirs();ZipFile zip = new ZipFile(zipFile, "GBK");for(Enumeration<ZipEntry> entries = zip.getEntries();entries.hasMoreElements();){ZipEntry entry = (ZipEntry)entries.nextElement();String zipEntryName = entry.getName();InputStream in = zip.getInputStream(entry);String outPath = (descDir +"/"+ zipEntryName).replaceAll("\\*", "/");//判断路径是否存在,不存在则创建文件路径File file = new File(outPath.substring(0, outPath.lastIndexOf('/')));if(!file.exists())file.mkdirs();//判断文件全路径是否为文件夹,如果是上面已经创建,不需要解压if(new File(outPath).isDirectory())continue;OutputStream out = new FileOutputStream(outPath);byte[] buf = new byte[1024];while((len=in.read(buf))>0){out.write(buf, 0, len);}in.close();out.close();}}
}
16.字号转中文字符串工具类
/*** 字号转中文字符串* @author wbw* 2014年11月20日*/
public class ZiAndHaoToChinaStr {private static final String LING ="零";private static final String YI ="一";private static final String ER ="二";private static final String SAN ="三";private static final String SI ="四";private static final String WU ="五";private static final String LIU ="六";private static final String QI ="七";private static final String BA ="八";private static final String JIU ="九";public static String toChinaStr(String str) {StringBuffer strb = new StringBuffer();for(int i = 0 ; i < str.length();i++){strb.append(toChinaChar(str.charAt(i)));}return strb.toString();}private static String toChinaChar(Character ch){String result= "";switch(ch){case '0':result = LING;break;case '1':result = YI;break;case '2':result = ER;break;case '3':result = SAN;break;case '4':result = SI;break;case '5':result = WU;break;case '6':result = LIU;break;case '7':result = QI;break;case '8':result = BA;break;case '9':result = JIU;break;default :result = "";}return result;}
}
package cn.my.utils;import java.sql.Connection;import org.apache.ibatis.session.defaults.DefaultSqlSessionFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;/*** ClassPathXmlApplicationContext 类*/
public class ApplicationUtil {private ApplicationUtil() {}private static ApplicationContext context = null;private static final String fileName = "/applicationContext.xml";/*** 初始化Spring环境* @return * ApplicationContext*/public static ApplicationContext getInstance() {if (context == null) {context = new ClassPathXmlApplicationContext(fileName);}return context;}/*** 获得数据库连接* @return * Connection*/public static Connection getConnection(){if(context == null){context = getInstance();}DefaultSqlSessionFactory dssf = (DefaultSqlSessionFactory) context.getBean("sqlSessionFactory");return dssf.openSession().getConnection();}
}
其实工具类还有很多很多,需要根据具体的项目情况而定.......未完待续
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