DWR3.0_Spring3.1_Hibernate4.1_JPA全注解实例

package cn.rong.testdwr.commons; import java.io.UnsupportedEncodingException; import java.security.MessageDigest; import java.util.Date; import java.util.Map; /** * <p> * Title: * </p> * <p> * Description: * </p> * <p> * Copyright: Copyright (c) 2012 * </p> * <p> * Company: * </p> * * @author * @version 1.0 */ public class StringUtil { private final static String[] hexDigits = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" }; /** * 转换字节数组为16进制字串 * * @param b 字节数组 * @return 16进制字串 */ public static String byteArrayToHexString(byte[] b) { StringBuffer resultSb = new StringBuffer(); for (int i = 0; i < b.length; i++) { resultSb.append(byteToHexString(b[i])); } return resultSb.toString(); } private static String byteToHexString(byte b) { int n = b; if (n < 0) n = 256 + n; int d1 = n / 16; int d2 = n % 16; return hexDigits[d1] + hexDigits[d2]; } /** * * @param origin * @return 返回经过MD5加密的字符串 */ public static String MD5Encode(String origin) { String resultString = null; try { resultString = new String(origin); MessageDigest md = MessageDigest.getInstance("MD5"); resultString = byteArrayToHexString(md.digest(resultString .getBytes("UTF-8"))); } catch (Exception ex) { } return resultString; } /** * * @param s * @param strCheck * @return 判断s中是否含有strCheck中的串 */ public static boolean inStr(String s, String[] strCheck) { boolean result = false; for (String check : strCheck) result = result || (s.trim().indexOf(check.trim()) > -1); return result; } /** * * @param file * @param split * @return 按照split分隔符取得文件的类型 */ public static String getFileType(String file, String split) { String in = file.trim(); String type = in.substring(in.lastIndexOf(split) + 1, in.length()); return type; } /** * * @param file * @param split * @return按照split分隔符取得文件的名字 */ public static String getFileName(String file, String split) { String in = file.trim(); String type = in.substring(0, in.lastIndexOf(split)); return type; } /** * * @param s * @param strcheck * @return 检测s是否为待检验的类型 */ public static boolean fileTypeChecker(String s, String strcheck) { boolean result = false; String type = getFileType(s, "."); String[] strCheck = splitStr(strcheck, ","); for (String check : strCheck) result = result || type.equals(check.trim()); return result; } /** * * @param strInput * @param strCheck * @return 检验strInput串中是否含有strCheck中的串 */ public static boolean checkStr(String[] strInput, String[] strCheck) { boolean result = false; for (String input : strInput) result = result || inStr(input, strCheck); return result; } /** * * @param str * @param length * @param insertStr * @return 按照长度在某一段字符串中插入另一段字符 */ public static String insertStr(String str, int length, String insertStr) { String result = ""; int total = str.length(); int i = 0; while (true) { if ((i + length) < total) result = result + str.substring(i, i + length) + insertStr; else { result = result + str.substring(i, total); break; } i = i + length; } return result; } /** * * @param s * @param strMap * @return 把s中的字符按照map中的对应字符进行替换 */ public static String replaceStr(String s, Map<String, String> strMap) { for (Map.Entry<String, String> entry : strMap.entrySet()) { s = s.replaceAll(entry.getKey(), entry.getValue()); } return s; } /** * * @param str * @param length * @param r * @return 切断字符串 */ public static String getStrByLength(String str, int length, String r) { if (str.length() < length) return str; String newStr = str.substring(0, length) + r; return newStr; } public static String[] splitStr(String s, String sp) { return s.split(sp); } /** * * @param s * @param sp * @param type * @return 把一组数字字符串转换为数字数组 */ public static int[] splitStr(String s, String sp, int type) { String[] intStr = splitStr(s, sp); int[] result = new int[intStr.length]; for (int i = 0; i < result.length; i++) { result[i] = Integer.parseInt(intStr[i]); } return result; } public static String encodeStr(String input, String sourceEncode, String targetEncode) { String result; try { result = new String(input.getBytes(sourceEncode), targetEncode); } catch (UnsupportedEncodingException e) { result = input; } return result; } public static void main(String[] args) { // System.err.println(MD5Encode("NoPassword")); // System.err.println(inStr("a",new String[]{"b","b"})); // Map<String,String> strMap=new HashMap<String,String>(); // strMap.put("fuck", "[-bi-]"); // strMap.put("逼", "[-呵呵-]"); // System.out.println(replaceStr("fuck you 逼!!",strMap)); // for(int i:splitStr("1,232,2312,231,312",",",1))System.out.println(i); System.out.println(getFileName("ab.txt", ".")); System.out.println(MD5Encode(new Date().toString())); } }