1 package com.gzcivil.utils;
2
3 import java.io.BufferedReader;
4 import java.io.ByteArrayOutputStream;
5 import java.io.InputStream;
6 import java.io.InputStreamReader;
7 import java.math.BigDecimal;
8 import java.text.SimpleDateFormat;
9 import java.util.Arrays;
10 import java.util.Calendar;
11 import java.util.Date;
12 import java.util.Locale;
13 import java.util.StringTokenizer;
14 import java.util.regex.Matcher;
15 import java.util.regex.Pattern;
16
17 /**
18 * 字符串工具
19 *
20 * @author LiJinlun
21 * @time 2015-12-5
22 */
23 public class StringUtils {
24
25 private static StringUtils instance;
26
27 private StringUtils() {
28 super();
29 }
30
31 public static String getDateTimeToString(Calendar cal, String format) {
32 return getDateTimeToString(cal.getTimeInMillis(), format);
33 }
34
35 public static String getDateTimeToString(long longTime, String format) {
36 SimpleDateFormat sdf = new SimpleDateFormat(format, Locale.getDefault());
37 Date date = new Date(longTime);
38 return sdf.format(date);
39 }
40
41 public static synchronized StringUtils getInstance() {
42 if (instance == null)
43 instance = new StringUtils();
44 return instance;
45 }
46
47 /** 将一个字符串从第一位开始截取到有数字出现的地方 */
48 public static String clearNumberString(String str) {
49 int minIndex = Integer.MAX_VALUE;
50 int[] index = new int[10];
51 for (int i = 0; i < 10; i++) {
52 index[i] = str.indexOf(String.valueOf(i));
53 if (index[i] != -1 && index[i] < minIndex) {
54 minIndex = index[i];
55 }
56 }
57 if (minIndex < Integer.MAX_VALUE) {
58 str = str.substring(0, minIndex);
59 }
60 return str;
61 }
62
63 /**
64 * 判断字符串是否为空
65 */
66 public static boolean isEmpty(String str) {
67 return null == str || str.trim().equals("");
68 }
69
70 /**
71 * 描述：手机号格式验证.
72 *
73 * @param str
74 * 指定的手机号码字符串
75 * @return 是否为手机号码格式:是为true，否则false
76 */
77 public static Boolean isMobilePhone(String str) {
78 Boolean isMobileNo = false;
79 try {
80 Pattern p = Pattern.compile("^((13[0-9])|(14[0-9])|(15[0-9])|(16[0-9])|(17[0-9])|(18[0-9])|(19[0-9]))\\d{8}$");
81 Matcher m = p.matcher(str);
82 isMobileNo = m.matches();
83 } catch (Exception e) {
84 e.printStackTrace();
85 }
86 return isMobileNo;
87 }
88
89 /**
90 * 获取字串字节长度
91 *
92 * @param str
93 * @return
94 */
95 public static int getLength(String str) {
96 return str.replaceAll("[^\\x00-\\xff]", "**").trim().length();
97 }
98
99 /** 返回double数据d小数点后面2位有效数字 */
100 public static double getDouble(double d) {
101 return new BigDecimal(d).setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();
102 }
103
104 /** 从double型返回String型，精确到小数点后2位 */
105 public static String getStringByDouble(double d) {
106 String str = String.valueOf(new BigDecimal(d).setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue());
107 try {
108 int index = str.indexOf('.');
109 if (index != -1) {
110 String tmpStr = str.substring(index + 1);
111 if ("0".equals(tmpStr)) {
112 str = str.substring(0, index);
113 }
114 }
115 } catch (Exception e) {
116 e.printStackTrace();
117 }
118 return str;
119 }
120
121 public static String getCorrectDistance(int distance) {
122 String result = "";
123 if (distance < 20) {
124 result = "附近";
125 } else if (distance < 1000) {
126 result = distance + "m";
127 } else {
128 result = String.format("%.1f", distance / 1000f) + "km";
129 }
130 return result;
131 }
132
133 /**
134 * 将秒数转换成文字描述
135 *
136 * @param tm单位秒
137 */
138 public static String secondsToString(int tm) {
139 if (tm <= 0)
140 return "00:00:00";
141 long hour = tm / 3600;
142 tm = tm % 3600;
143 long min = tm / 60;
144 tm = tm % 60;
145
146 String result = "";
147 if (hour < 10) {
148 result = "0" + hour + ":";
149 } else {
150 result = String.valueOf(hour) + ":";
151 }
152
153 if (min < 10) {
154 result += "0" + min + ":";
155 } else {
156 result += min + ":";
157 }
158
159 if (tm < 10) {
160 result += "0" + tm;
161 } else {
162 result += String.valueOf(tm);
163 }
164 return result;
165 }
166
167 /**
168 * 检测是否JSON字串
169 *
170 * @param source
171 * @return
172 */
173 public static boolean isJson(String source) {
174 String tmp = null == source ? "" : source.trim();
175 if ("".equals(tmp) || tmp.length() < 1)
176 return false;
177 else if (tmp.startsWith("{") && tmp.endsWith("}"))
178 return true;
179 else if (tmp.startsWith("[") && tmp.endsWith("]"))
180 return true;
181 else
182 return false;
183 }
184
185 public static String str2int(String source) {
186 String result = "";
187 LogUtils.i("ls", "result" + result);
188 for (int i = 0; i < source.length(); i++) {
189 if (source.charAt(i) >= '0' && source.charAt(i) <= '9')
190 result += source.charAt(i);
191
192 }
193 return result;
194 }
195
196 /**
197 * MD5编码
198 *
199 * @param source
200 * @return
201 */
202 public static String md5(byte[] source) {
203 char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
204 try {
205 java.security.MessageDigest md = java.security.MessageDigest.getInstance("MD5");
206 md.update(source);
207 byte tmp[] = md.digest();
208 char str[] = new char[16 * 2];
209 for (int i = 0, k = 0; i < 16; i++) {
210 byte byte0 = tmp[i];
211 str[k++] = hexDigits[byte0 >>> 4 & 0xf];
212 str[k++] = hexDigits[byte0 & 0xf];
213 }
214 return new String(str);
215 } catch (Exception e) {
216 LogUtils.e("md5(): error=" + e.getMessage(), "StringTool");
217 return "";
218 }
219 }
220
221 /**
222 * base64编码,将字节数组编码为字符串
223 *
224 * @param source
225 * @return String
226 */
227 public static String base64_encode(byte[] source) {
228 char[] base64EncodeChars = new char[] { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/' };
229 try {
230 StringBuffer sb = new StringBuffer();
231 int len = source.length;
232 int i = 0;
233 int b1, b2, b3;
234 while (i < len) {
235 b1 = source[i++] & 0xff;
236 if (i == len) {
237 sb.append(base64EncodeChars[b1 >>> 2]);
238 sb.append(base64EncodeChars[(b1 & 0x3) << 4]);
239 sb.append("==");
240 break;
241 }
242 b2 = source[i++] & 0xff;
243 if (i == len) {
244 sb.append(base64EncodeChars[b1 >>> 2]);
245 sb.append(base64EncodeChars[((b1 & 0x03) << 4) | ((b2 & 0xf0) >>> 4)]);
246 sb.append(base64EncodeChars[(b2 & 0x0f) << 2]);
247 sb.append("=");
248 break;
249 }
250 b3 = source[i++] & 0xff;
251 sb.append(base64EncodeChars[b1 >>> 2]);
252 sb.append(base64EncodeChars[((b1 & 0x03) << 4) | ((b2 & 0xf0) >>> 4)]);
253 sb.append(base64EncodeChars[((b2 & 0x0f) << 2) | ((b3 & 0xc0) >>> 6)]);
254 sb.append(base64EncodeChars[b3 & 0x3f]);
255 }
256 return sb.toString();
257 } catch (Exception e) {
258 LogUtils.e("base64_encode(): error=" + e.getMessage(), "StringTool");
259 return "";
260 }
261 }
262
263 /**
264 * base64编码,解码为字节数组
265 *
266 * @param source
267 * @return byte[]
268 */
269 public static byte[] base64_decode(String source) {
270 byte[] base64DecodeChars = new byte[] { -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1 };
271 try {
272 byte[] data = source.getBytes();
273 int len = data.length;
274 ByteArrayOutputStream buf = new ByteArrayOutputStream(len);
275 int i = 0;
276 int b1, b2, b3, b4;
277 while (i < len) {
278 /* b1 */
279 do {
280 b1 = base64DecodeChars[data[i++]];
281 } while (i < len && b1 == -1);
282 if (b1 == -1)
283 break;
284
285 /* b2 */
286 do {
287 b2 = base64DecodeChars[data[i++]];
288 } while (i < len && b2 == -1);
289 if (b2 == -1)
290 break;
291 buf.write((int) ((b1 << 2) | ((b2 & 0x30) >>> 4)));
292
293 /* b3 */
294 do {
295 b3 = data[i++];
296 if (b3 == 61)
297 return buf.toByteArray();
298 b3 = base64DecodeChars[b3];
299 } while (i < len && b3 == -1);
300 if (b3 == -1)
301 break;
302 buf.write((int) (((b2 & 0x0f) << 4) | ((b3 & 0x3c) >>> 2)));
303
304 /* b4 */
305 do {
306 b4 = data[i++];
307 if (b4 == 61)
308 return buf.toByteArray();
309 b4 = base64DecodeChars[b4];
310 } while (i < len && b4 == -1);
311 if (b4 == -1)
312 break;
313 buf.write((int) (((b3 & 0x03) << 6) | b4));
314 }
315 return buf.toByteArray();
316 } catch (Exception e) {
317 LogUtils.i("ls", "base64_decode(): error=" + e.getMessage());
318 return "".getBytes();
319 }
320 }
321
322 public static String join(String separator, Object[] o) {
323 return implode(separator, Arrays.asList(o));
324 }
325
326 protected static <T> String implode(String separator, Iterable<T> elements) {
327 StringBuilder out = new StringBuilder();
328 boolean first = true;
329 for (Object s : elements) {
330 if (s == null)
331 continue;
332 else if (first)
333 first = false;
334 else
335 out.append(separator);
336 out.append(s);
337 }
338 return out.toString();
339 }
340
341 public static String[] explode(String glue, String str) {
342 String[] outData;
343 try {
344 StringTokenizer st = new StringTokenizer(str, glue);
345 outData = new String[st.countTokens()];
346 for (int i = 0; st.hasMoreTokens();) {
347 outData[i++] = st.nextToken();
348 }
349 } catch (Exception e) {
350 outData = new String[] { str };
351 e.printStackTrace();
352 }
353 return outData;
354 }
355
356 /**
357 * 得到字符串双字节长度
358 *
359 * @param str
360 * @return
361 */
362 public static int getDoubleByteLength(String str) {
363 return str.replaceAll("[^\\x00-\\xff]", "xx").trim().length();
364 }
365
366 /**
367 * 将流转换成字符串
368 *
369 * @param is
370 * @return
371 */
372 public static String getStringByStream(InputStream is) {
373 StringBuffer sb = new StringBuffer();
374 try {
375 BufferedReader br = new BufferedReader(new InputStreamReader(is));
376 String line = null;
377 while ((line = br.readLine()) != null) {
378 sb.append(line);
379 }
380 } catch (Exception e) {
381 e.printStackTrace();
382 }
383 return sb.toString();
384 }
385
386 /**
387 * 将流转换成字符串
388 *
389 * @param is
390 * @param chatset
391 * 字符编码
392 * @return
393 */
394 public static String getStringByStream(InputStream is, String chatset) {
395 StringBuffer sb = new StringBuffer();
396 try {
397 byte[] bytes = new byte[1024];
398 int len = 0;
399 while ((len = is.read(bytes)) != -1) {
400 sb.append(new String(bytes, 0, len, chatset));
401 }
402 } catch (Exception e) {
403 // TODO: handle exception
404 e.printStackTrace();
405 }
406 return sb.toString();
407 }
408
409 }
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