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新增随机子字符串方法

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This commit is contained in:
wanggeng888 2021-04-20 11:11:00 +08:00
parent bf943d5410
commit 855821cb95
1 changed files with 27 additions and 2 deletions
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29
basic-util/src/main/java/ink/wgink/util/string/WStringUtil.java
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@ -8,6 +8,7 @@ import net.sourceforge.pinyin4j.format.HanyuPinyinToneType;
import net.sourceforge.pinyin4j.format.HanyuPinyinVCharType; import net.sourceforge.pinyin4j.format.HanyuPinyinVCharType;
import net.sourceforge.pinyin4j.format.exception.BadHanyuPinyinOutputFormatCombination; import net.sourceforge.pinyin4j.format.exception.BadHanyuPinyinOutputFormatCombination;
import java.util.Random;
import java.util.regex.Matcher; import java.util.regex.Matcher;
import java.util.regex.Pattern; import java.util.regex.Pattern;
@ -46,7 +47,7 @@ public class WStringUtil {
* @param valStr * @param valStr
* @return String[] * @return String[]
*/ */
public static String[] StrList(String valStr) { public static String[] strList(String valStr) {
int i = 0; int i = 0;
String TempStr = valStr; String TempStr = valStr;
String[] returnStr = new String[valStr.length() + 1 - TempStr.replace(",", "").length()]; String[] returnStr = new String[valStr.length() + 1 - TempStr.replace(",", "").length()];
@ -54,7 +55,6 @@ public class WStringUtil {
while (valStr.indexOf(',') > 0) { while (valStr.indexOf(',') > 0) {
returnStr[i] = valStr.substring(0, valStr.indexOf(',')); returnStr[i] = valStr.substring(0, valStr.indexOf(','));
valStr = valStr.substring(valStr.indexOf(',') + 1, valStr.length()); valStr = valStr.substring(valStr.indexOf(',') + 1, valStr.length());
i++; i++;
} }
return returnStr; return returnStr;
@ -282,4 +282,29 @@ public class WStringUtil {
return strBuf.toString(); return strBuf.toString();
} }
/**
* 从字符串中随机取出新的字符串
*
* @param input 输入字符串
* @param outLength 新字符串长度
* @return
*/
public static String randomSubStr(String input, int outLength) {
if (input == null || input.isEmpty()) {
return null;
}
if (outLength >= input.length()) {
outLength = input.length();
}
if (outLength <= 0) {
outLength = 6;
}
StringBuilder subStrSB = new StringBuilder();
Random random = new Random();
for (int i = 0; i < outLength; i++) {
subStrSB.append(input.charAt(random.nextInt(input.length())));
}
return subStrSB.toString();
}
} }