常用工具類封裝

2019-11-11 06:15:23

字體：大中小

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日期轉換工具類 CommUtil.java

[java] view plain copypackage com.util; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; /** * 日期轉換工具類 */ public class CommUtil { /** * 將日期格式轉換成yyyy-MM-dd的字符串格式 * 返回值如：2010-10-06 * @param time 要轉換的日期 * @return */ public static String dateToString(Date time) { SimpleDateFormat formatter = new SimpleDateFormat ("yyyy-MM-dd"); //定義將日期格式要換成的格式 String stringTime = formatter.format(time); return stringTime; } /** * 將日期格式轉換成yyyyMMdd的字符串格式 * 返回值如：2010-10-06 * @param time 要轉換的日期 * @return */ public static String dateTimeToString(Date time) { SimpleDateFormat formatter = new SimpleDateFormat ("yyyyMMdd"); //定義將日期格式要換成的格式 String stringTime = formatter.format(time); return stringTime; } /** * 將日期格式轉換成yyyy-MM-dd的字符串格式 * 返回值如：2010-10-06 * @param time 要轉換的日期 * @return */ public static Date dateToDate(Date time) { SimpleDateFormat formatter = new SimpleDateFormat ("yyyy-MM-dd"); //定義將日期格式要換成的格式 String stringTime = formatter.format(time); Date date = null; try { date = formatter.parse(stringTime); } catch (ParseException e) { e.PRintStackTrace(); } return date; } /** * 得到當前時間，以字符串表示 * @return */ public static String getDate(){ Date date = new Date(); return CommUtil.dateToString(date); } }

日期轉換類 DateConverter.java

[java] view plain copypackage com.util; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Map; import com.opensymphony.xwork2.conversion.impl.DefaultTypeConverter; /** * 日期轉換類 * */ public class DateConverter extends DefaultTypeConverter { private static final DateFormat[] ACCEPT_DATE_FORMATS = { new SimpleDateFormat("dd/MM/yyyy"), new SimpleDateFormat("yyyy-MM-dd"), new SimpleDateFormat("yyyy/MM/dd") }; //支持轉換的日期格式 @Override public Object convertValue(Map context, Object value, Class toType) { if (toType == Date.class) { //瀏覽器向服務器提交時，進行String to Date的轉換 Date date = null; String dateString = null; String[] params = (String[])value; dateString = params[0];//獲取日期的字符串 for (DateFormat format : ACCEPT_DATE_FORMATS) { try { return format.parse(dateString);//遍歷日期支持格式，進行轉換 } catch(Exception e) { continue; } } return null; } else if (toType == String.class) { //服務器向瀏覽器輸出時，進行Date to String的類型轉換 Date date = (Date)value; return new SimpleDateFormat("yyyy-MM-dd").format(date);//輸出的格式是yyyy-MM-dd } return null; } }

功能更強大的格式化工具類 FormatUtils.java

[java] view plain copypackage com.util; import java.text.DecimalFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; /** * 功能更強大的格式化工具類 */ public class FormatUtils { private static SimpleDateFormat second = new SimpleDateFormat( "yy-MM-dd hh:mm:ss"); private static SimpleDateFormat day = new SimpleDateFormat("yyyy-MM-dd"); private static SimpleDateFormat detailDay = new SimpleDateFormat("yyyy年MM月dd日"); private static SimpleDateFormat fileName = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss"); private static SimpleDateFormat tempTime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); private static SimpleDateFormat ExcelDate = new SimpleDateFormat("yyyy/MM/dd"); /** * 格式化excel中的時間 * @param date * @return */ public static String formatDateForExcelDate(Date date) { return excelDate.format(date); } /** * 將日期格式化作為文件名 * @param date * @return */ public static String formatDateForFileName(Date date) { return fileName.format(date); } /** * 格式化日期(精確到秒) * * @param date * @return */ public static String formatDateSecond(Date date) { return second.format(date); } /** * 格式化日期(精確到秒) * * @param date * @return */ public static String tempDateSecond(Date date) { return tempTime.format(date); } public static Date tempDateSecond(String str) { try { return tempTime.parse(str); } catch (ParseException e) { e.printStackTrace(); } return new Date(); } /** * 格式化日期(精確到天) * * @param date * @return */ public static String formatDateDay(Date date) { return day.format(date); } /** * 格式化日期(精確到天) * * @param date * @return */ public static String formatDateDetailDay(Date date) { return detailDay.format(date); } /** * 將double類型的數字保留兩位小數（四舍五入） * * @param number * @return */ public static String formatNumber(double number) { DecimalFormat df = new DecimalFormat(); df.applyPattern("#0.00"); return df.format(number); } /** * 將字符串轉換成日期 * * @param date * @return * @throws Exception */ public static Date formateDate(String date) throws Exception { return day.parse(date); } /** * 將字符日期轉換成Date * @param date * @return * @throws Exception */ public static Date parseStringToDate(String date) throws Exception { return day.parse(date); } public static String formatDoubleNumber(double number) { DecimalFormat df = new DecimalFormat("#"); return df.format(number); }

分頁工具類 SharePager.java

[java] view plain copypackage com.util; /** * 分頁工具類 * */ public class SharePager { private int totalRows; //總行數 private int pageSize = 20; //每頁顯示的行數 private int currentPage; //當前頁號 private int totalPages; //總頁數 private int startRow; //當前頁在數據庫中的起始行 /** * 默認構造函數 */ public SharePager() { } /**默認每頁10行 * @param totalRows */ public SharePager(int totalRows) { this.totalRows = totalRows; totalPages =(int) Math.ceil((double)totalRows / (double)pageSize); startRow = 0; } /**可自定義每頁顯示多少頁 * @param totalRows * @param pageSize */ public SharePager(int totalRows, int pageSize) { this.totalRows = totalRows; this.pageSize = pageSize; if(this.pageSize<1) this.pageSize=1; else if(pageSize>20) this.pageSize=20; // if(this.pageSize>totalRows){ // this.pageSize=(int)totalRows; // } totalPages =(int) Math.ceil((double)totalRows / (double)this.pageSize); currentPage = 1; startRow = 0; } /** * 跳轉到首頁 */ public void first() { this.currentPage = 1; this.startRow = 0; } /** * 跳轉到上一頁 */ public void previous() { if (currentPage == 1) { return; } currentPage--; startRow = (currentPage-1) * pageSize; } /** * 跳轉到下一頁 */ public void next() { if (currentPage < totalPages) { currentPage++; } startRow = (currentPage-1) * pageSize; } /** * 跳轉到尾頁 */ public void last() { this.currentPage = totalPages; if(currentPage<1){ currentPage = 1; } this.startRow = (currentPage-1) * this.pageSize; totalPages =(int) Math.ceil((double)totalRows / (double)this.pageSize); } /** * 跳轉到指定頁 * @param currentPage 指定的頁 */ public void refresh(int currentPage) { if(currentPage < 0) { first(); } if (currentPage > totalPages) { last(); }else{ this.currentPage = currentPage; this.startRow = (currentPage-1) * this.pageSize; } } public int getStartRow() { return startRow; } public int getTotalPages() { return totalPages; } public int getCurrentPage() { return currentPage; } public int getPageSize() { return pageSize; } public void setTotalRows(int totalRows) { this.totalRows = totalRows; } public void setStartRow(int startRow) { this.startRow = startRow; } public void setTotalPages(int totalPages) { this.totalPages = totalPages; } public void setCurrentPage(int currentPage) { this.currentPage = currentPage; } public void setPageSize(int pageSize) { this.pageSize = pageSize; } public int getTotalRows() { return totalRows; } }

讀取Config文件工具類 PropertiesConfig.java

[java] view plain copypackage com.util; import java.io.BufferedInputStream; import java.io.FileInputStream; import java.io.InputStream; import java.util.Properties; /** * 讀取Config文件工具類 * @version 1.0 * @since JDK 1.6 */ public class PropertiesConfig { /** * 獲取整個配置文件中的屬性 * @param filePath 文件路徑，即文件所在包的路徑，例如：java/util/config.properties */ public static Properties readData(String filePath) { filePath = getRealPath(filePath); Properties props = new Properties(); try { InputStream in = new BufferedInputStream(new FileInputStream(filePath)); props.load(in); in.close(); return props; } catch (Exception e) { e.printStackTrace(); return null; } } private static String getRealPath(String filePath) { //獲取絕對路徑并截掉路徑的”file:/“前綴 return PropertiesConfig.class.getResource("/" + filePath).toString().substring(6); } }

md5編碼工具類 MD5Code.java

[java] view plain copypackage com.util; /** * MD5編碼工具類 * */ public class MD5Code { static final int S11 = 7; static final int S12 = 12; static final int S13 = 17; static final int S14 = 22; static final int S21 = 5; static final int S22 = 9; static final int S23 = 14; static final int S24 = 20; static final int S31 = 4; static final int S32 = 11; static final int S33 = 16; static final int S34 = 23; static final int S41 = 6; static final int S42 = 10; static final int S43 = 15; static final int S44 = 21; static final byte[] PADDING = { -128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; private long[] state = new long[4];// state (ABCD) private long[] count = new long[2];// number of bits, modulo 2^64 (lsb // first) private byte[] buffer = new byte[64]; // input buffer public String digestHexStr; private byte[] digest = new byte[16]; public String getMD5ofStr(String inbuf) { md5Init(); md5Update(inbuf.getBytes(), inbuf.length()); md5Final(); digestHexStr = ""; for (int i = 0; i < 16; i++) { digestHexStr += byteHEX(digest[i]); } return digestHexStr; } public MD5Code() { md5Init(); return; } private void md5Init() { count[0] = 0L; count[1] = 0L; // /* Load magic initialization constants. state[0] = 0x67452301L; state[1] = 0xefcdab89L; state[2] = 0x98badcfeL; state[3] = 0x10325476L; return; } private long F(long x, long y, long z) { return (x & y) | ((~x) & z); } private long G(long x, long y, long z) { return (x & z) | (y & (~z)); } private long H(long x, long y, long z) { return x ^ y ^ z; } private long I(long x, long y, long z) { return y ^ (x | (~z)); } private long FF(long a, long b, long c, long d, long x, long s, long ac) { a += F(b, c, d) + x + ac; a = ((int) a << s) | ((int) a >>> (32 - s)); a += b; return a; } private long GG(long a, long b, long c, long d, long x, long s, long ac) { a += G(b, c, d) + x + ac; a = ((int) a << s) | ((int) a >>> (32 - s)); a += b; return a; } private long HH(long a, long b, long c, long d, long x, long s, long ac) { a += H(b, c, d) + x + ac; a = ((int) a << s) | ((int) a >>> (32 - s)); a += b; return a; } private long II(long a, long b, long c, long d, long x, long s, long ac) { a += I(b, c, d) + x + ac; a = ((int) a << s) | ((int) a >>> (32 - s)); a += b; return a; } private void md5Update(byte[] inbuf, int inputLen) { int i, index, partLen; byte[] block = new byte[64]; index = (int) (count[0] >>> 3) & 0x3F; // /* Update number of bits */ if ((count[0] += (inputLen << 3)) < (inputLen << 3)) count[1]++; count[1] += (inputLen >>> 29); partLen = 64 - index; // Transform as many times as possible. if (inputLen >= partLen) { md5Memcpy(buffer, inbuf, index, 0, partLen); md5Transform(buffer); for (i = partLen; i + 63 < inputLen; i += 64) { md5Memcpy(block, inbuf, 0, i, 64); md5Transform(block); } index = 0; } else i = 0; // /* Buffer remaining input */ md5Memcpy(buffer, inbuf, index, i, inputLen - i); } private void md5Final() { byte[] bits = new byte[8]; int index, padLen; // /* Save number of bits */ Encode(bits, count, 8); // /* Pad out to 56 mod 64. index = (int) (count[0] >>> 3) & 0x3f; padLen = (index < 56) ? (56 - index) : (120 - index); md5Update(PADDING, padLen); // /* Append length (before padding) */ md5Update(bits, 8); // /* Store state in digest */ Encode(digest, state, 16); } private void md5Memcpy(byte[] output, byte[] input, int outpos, int inpos, int len) { int i; for (i = 0; i < len; i++) output[outpos + i] = input[inpos + i]; } private void md5Transform(byte block[]) { long a = state[0], b = state[1], c = state[2], d = state[3]; long[] x = new long[16]; Decode(x, block, 64); /* Round 1 */ a = FF(a, b, c, d, x[0], S11, 0xd76aa478L); /* 1 */ d = FF(d, a, b, c, x[1], S12, 0xe8c7b756L); /* 2 */ c = FF(c, d, a, b, x[2], S13, 0x242070dbL); /* 3 */ b = FF(b, c, d, a, x[3], S14, 0xc1bdceeeL); /* 4 */ a = FF(a, b, c, d, x[4], S11, 0xf57c0fafL); /* 5 */ d = FF(d, a, b, c, x[5], S12, 0x4787c62aL); /* 6 */ c = FF(c, d, a, b, x[6], S13, 0xa8304613L); /* 7 */ b = FF(b, c, d, a, x[7], S14, 0xfd469501L); /* 8 */ a = FF(a, b, c, d, x[8], S11, 0x698098d8L); /* 9 */ d = FF(d, a, b, c, x[9], S12, 0x8b44f7afL); /* 10 */ c = FF(c, d, a, b, x[10], S13, 0xffff5bb1L); /* 11 */ b = FF(b, c, d, a, x[11], S14, 0x895cd7beL); /* 12 */ a = FF(a, b, c, d, x[12], S11, 0x6b901122L); /* 13 */ d = FF(d, a, b, c, x[13], S12, 0xfd987193L); /* 14 */ c = FF(c, d, a, b, x[14], S13, 0xa679438eL); /* 15 */ b = FF(b, c, d, a, x[15], S14, 0x49b40821L); /* 16 */ /* Round 2 */ a = GG(a, b, c, d, x[1], S21, 0xf61e2562L); /* 17 */ d = GG(d, a, b, c, x[6], S22, 0xc040b340L); /* 18 */ c = GG(c, d, a, b, x[11], S23, 0x265e5a51L); /* 19 */ b = GG(b, c, d, a, x[0], S24, 0xe9b6c7aaL); /* 20 */ a = GG(a, b, c, d, x[5], S21, 0xd62f105dL); /* 21 */ d = GG(d, a, b, c, x[10], S22, 0x2441453L); /* 22 */ c = GG(c, d, a, b, x[15], S23, 0xd8a1e681L); /* 23 */ b = GG(b, c, d, a, x[4], S24, 0xe7d3fbc8L); /* 24 */ a = GG(a, b, c, d, x[9], S21, 0x21e1cde6L); /* 25 */ d = GG(d, a, b, c, x[14], S22, 0xc33707d6L); /* 26 */ c = GG(c, d, a, b, x[3], S23, 0xf4d50d87L); /* 27 */ b = GG(b, c, d, a, x[8], S24, 0x455a14edL); /* 28 */ a = GG(a, b, c, d, x[13], S21, 0xa9e3e905L); /* 29 */ d = GG(d, a, b, c, x[2], S22, 0xfcefa3f8L); /* 30 */ c = GG(c, d, a, b, x[7], S23, 0x676f02d9L); /* 31 */ b = GG(b, c, d, a, x[12], S24, 0x8d2a4c8aL); /* 32 */ /* Round 3 */ a = HH(a, b, c, d, x[5], S31, 0xfffa3942L); /* 33 */ d = HH(d, a, b, c, x[8], S32, 0x8771f681L); /* 34 */ c = HH(c, d, a, b, x[11], S33, 0x6d9d6122L); /* 35 */ b = HH(b, c, d, a, x[14], S34, 0xfde5380cL); /* 36 */ a = HH(a, b, c, d, x[1], S31, 0xa4beea44L); /* 37 */ d = HH(d, a, b, c, x[4], S32, 0x4bdecfa9L); /* 38 */ c = HH(c, d, a, b, x[7], S33, 0xf6bb4b60L); /* 39 */ b = HH(b, c, d, a, x[10], S34, 0xbebfbc70L); /* 40 */ a = HH(a, b, c, d, x[13], S31, 0x289b7ec6L); /* 41 */ d = HH(d, a, b, c, x[0], S32, 0xeaa127faL); /* 42 */ c = HH(c, d, a, b, x[3], S33, 0xd4ef3085L); /* 43 */ b = HH(b, c, d, a, x[6], S34, 0x4881d05L); /* 44 */ a = HH(a, b, c, d, x[9], S31, 0xd9d4d039L); /* 45 */ d = HH(d, a, b, c, x[12], S32, 0xe6db99e5L); /* 46 */ c = HH(c, d, a, b, x[15], S33, 0x1fa27cf8L); /* 47 */ b = HH(b, c, d, a, x[2], S34, 0xc4ac5665L); /* 48 */ /* Round 4 */ a = II(a, b, c, d, x[0], S41, 0xf4292244L); /* 49 */ d = II(d, a, b, c, x[7], S42, 0x432aff97L); /* 50 */ c = II(c, d, a, b, x[14], S43, 0xab9423a7L); /* 51 */ b = II(b, c, d, a, x[5], S44, 0xfc93a039L); /* 52 */ a = II(a, b, c, d, x[12], S41, 0x655b59c3L); /* 53 */ d = II(d, a, b, c, x[3], S42, 0x8f0ccc92L); /* 54 */ c = II(c, d, a, b, x[10], S43, 0xffeff47dL); /* 55 */ b = II(b, c, d, a, x[1], S44, 0x85845dd1L); /* 56 */ a = II(a, b, c, d, x[8], S41, 0x6fa87e4fL); /* 57 */ d = II(d, a, b, c, x[15], S42, 0xfe2ce6e0L); /* 58 */ c = II(c, d, a, b, x[6], S43, 0xa3014314L); /* 59 */ b = II(b, c, d, a, x[13], S44, 0x4e0811a1L); /* 60 */ a = II(a, b, c, d, x[4], S41, 0xf7537e82L); /* 61 */ d = II(d, a, b, c, x[11], S42, 0xbd3af235L); /* 62 */ c = II(c, d, a, b, x[2], S43, 0x2ad7d2bbL); /* 63 */ b = II(b, c, d, a, x[9], S44, 0xeb86d391L); /* 64 */ state[0] += a; state[1] += b; state[2] += c; state[3] += d; } private void Encode(byte[] output, long[] input, int len) { int i, j; for (i = 0, j = 0; j < len; i++, j += 4) { output[j] = (byte) (input[i] & 0xffL); output[j + 1] = (byte) ((input[i] >>> 8) & 0xffL); output[j + 2] = (byte) ((input[i] >>> 16) & 0xffL); output[j + 3] = (byte) ((input[i] >>> 24) & 0xffL); } } private void Decode(long[] output, byte[] input, int len) { int i, j; for (i = 0, j = 0; j < len; i++, j += 4) output[i] = b2iu(input[j]) | (b2iu(input[j + 1]) << 8) | (b2iu(input[j + 2]) << 16) | (b2iu(input[j + 3]) << 24); return; } public static long b2iu(byte b) { return b < 0 ? b & 0x7F + 128 : b; } public static String byteHEX(byte ib) { char[] Digit = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; char[] ob = new char[2]; ob[0] = Digit[(ib >>> 4) & 0X0F]; ob[1] = Digit[ib & 0X0F]; String s = new String(ob); return s; } }

文件上傳工具類 UploadUtil.java

[java] view plain copypackage com.util; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; import java.util.Calendar; /** * 文件上傳工具類 * */ public class UploadUtil { private static final int BUFFER_SIZE = 16 * 1024; //保存圖片 public static synchronized void copy(File src, File newFile) { try { InputStream is = null; OutputStream os = null; try { is = new BufferedInputStream(new FileInputStream(src), BUFFER_SIZE); os = new BufferedOutputStream(new FileOutputStream(newFile), BUFFER_SIZE); byte[] buffer = new byte[BUFFER_SIZE]; while (is.read(buffer) > 0) { os.write(buffer); } } finally { if (null != is) { is.close(); } if (null != os) { os.close(); } } } catch (Exception e) { e.printStackTrace(); } } /** * 返回年號+月號+天+時+分+秒+隨機碼 * @return */ @SuppressWarnings("static-access") public static synchronized String getTime() { Calendar calendar = Calendar.getInstance(); String year = calendar.get(calendar.YEAR) + ""; String month = (calendar.get(calendar.MONTH) + 1) + ""; String day = calendar.get(calendar.DAY_OF_MONTH) + ""; String hour = calendar.get(calendar.HOUR_OF_DAY) + ""; String minute = calendar.get(calendar.MINUTE) + ""; String second = calendar.get(calendar.SECOND) + ""; String milliSecond = calendar.get(calendar.MILLISECOND) + ""; int r = (int)(Math.random()*100000); String random = String.valueOf(r); return year + month + day + hour + minute + second + milliSecond + random+"a"; } }

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