com.github.javaclub.cdl.client.util.TStringUtil Maven / Gradle / Ivy
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package com.github.javaclub.cdl.client.util;
import java.util.ArrayList;
import java.util.List;
public class TStringUtil {
public static String getBetween(String sql, String start, String end) {
int index0 = sql.indexOf(start);
if (index0 == -1) {
return null;
}
int index1 = sql.indexOf(end, index0);
if (index1 == -1) {
return null;
}
return sql.substring(index0 + start.length(), index1).trim();
}
/**
* @param str
* @param splitor
* @return
*/
public static String[] twoPartSplit(String str, String splitor) {
if (splitor != null) {
int index = str.indexOf(splitor);
if (index != -1) {
String first = str.substring(0, index);
String sec = str.substring(index + splitor.length());
return new String[] { first, sec };
} else {
return new String[] { str };
}
} else {
return new String[] { str };
}
}
public static List split(String str, String splitor) {
List re = new ArrayList();
String[] strs = twoPartSplit(str, splitor);
if (strs.length == 2) {
re.add(strs[0]);
re.addAll(split(strs[1], splitor));
} else {
re.add(strs[0]);
}
return re;
}
public static void main(String[] args) {
String test = "sdfsdfsdfs liqiangsdfsdfwerfsdfliqiang woshi whaosdf";
List strs = split(test, "liqiang");
for (String str : strs) {
System.out.println(str);
}
}
/**
*
* @param sql
* @param start
* @param end
* @return
*/
public static String removeBetweenWithSplitor(String sql, String start, String end) {
int index0 = sql.indexOf(start);
if (index0 == -1) {
return sql;
}
int index1 = sql.indexOf(end, index0);
if (index1 == -1) {
return sql;
}
StringBuilder sb = new StringBuilder();
sb.append(sql.substring(0, index0));
sb.append(" ");
sb.append(sql.substring(index1 + end.length()));
return sb.toString();
}
/**
*/
public static String fillTabWithSpace(String str) {
if (str == null) {
return null;
}
str = str.trim();
int sz = str.length();
StringBuilder buffer = new StringBuilder(sz);
int index = 0, index0 = -1, index1 = -1;
for (int i = 0; i < sz; i++) {
char c = str.charAt(i);
if (!Character.isWhitespace(c)) {
if (index0 != -1) {
// if (!(index0 == index1 && str.charAt(i - 1) == ' ')) {
if (index0 != index1 || str.charAt(i - 1) != ' ') {
buffer.append(str.substring(index, index0)).append(" ");
index = index1 + 1;
}
}
index0 = index1 = -1;
} else {
if (index0 == -1) {
index0 = index1 = i;
} else {
index1 = i;
}
}
}
buffer.append(str.substring(index));
return buffer.toString();
}
/**
*
* StringUtil.equals(null, null) = true
* StringUtil.equals(null, "abc") = false
* StringUtil.equals("abc", null) = false
* StringUtil.equals("abc", "abc") = true
* StringUtil.equals("abc", "ABC") = false
*
*
*/
public static boolean equals(String str1, String str2) {
if (str1 == null) {
return str2 == null;
}
return str1.equals(str2);
}
/**
* StringUtil.substringBetween(null, *) = null
* StringUtil.substringBetween("", "") = "" StringUtil.substringBetween("",
* "tag") = null StringUtil.substringBetween("tagabctag", null) = null
* StringUtil.substringBetween("tagabctag", "") = ""
* StringUtil.substringBetween("tagabctag", "tag") = "abc"
* StringUtil.substringBetween(null, *, *) = null
* StringUtil.substringBetween("", "", "") = ""
* StringUtil.substringBetween("", "", "tag") = null
* StringUtil.substringBetween("", "tag", "tag") = null
* StringUtil.substringBetween("yabcz", null, null) = null
* StringUtil.substringBetween("yabcz", "", "") = ""
* StringUtil.substringBetween("yabcz", "y", "z") = "abc"
* StringUtil.substringBetween("yabczyabcz", "y", "z") = "abc"
*
*
*
*
*/
public static String substringBetween(String str, String open, String close) {
return substringBetween(str, open, close, 0);
}
/**
*
* StringUtil.substringBetween(null, *, *) = null
* StringUtil.substringBetween("", "", "") = ""
* StringUtil.substringBetween("", "", "tag") = null
* StringUtil.substringBetween("", "tag", "tag") = null
* StringUtil.substringBetween("yabcz", null, null) = null
* StringUtil.substringBetween("yabcz", "", "") = ""
* StringUtil.substringBetween("yabcz", "y", "z") = "abc"
* StringUtil.substringBetween("yabczyabcz", "y", "z") = "abc"
*
*
*
*/
public static String substringBetween(String str, String open, String close, int fromIndex) {
if ((str == null) || (open == null) || (close == null)) {
return null;
}
int start = str.indexOf(open, fromIndex);
if (start != -1) {
int end = str.indexOf(close, start + open.length());
if (end != -1) {
return str.substring(start + open.length(), end);
}
}
return null;
}
/**
*
* StringUtil.right(null, *) = null
* StringUtil.right(*, -ve) = ""
* StringUtil.right("", *) = ""
* StringUtil.right("abc", 0) = ""
* StringUtil.right("abc", 2) = "bc"
* StringUtil.right("abc", 4) = "abc"
*
*
*
*/
public static String right(String str, int len) {
if (str == null) {
return null;
}
if (len < 0) {
return EMPTY_STRING;
}
if (str.length() <= len) {
return str;
} else {
return str.substring(str.length() - len);
}
}
/**
*
* StringUtil.left(null, *) = null
* StringUtil.left(*, -ve) = ""
* StringUtil.left("", *) = ""
* StringUtil.left("abc", 0) = ""
* StringUtil.left("abc", 2) = "ab"
* StringUtil.left("abc", 4) = "abc"
*
*
*
*/
public static String left(String str, int len) {
if (str == null) {
return null;
}
if (len < 0) {
return EMPTY_STRING;
}
if (str.length() <= len) {
return str;
} else {
return str.substring(0, len);
}
}
/**
*
*
*
* StringUtil.isNumeric(null) = false
* StringUtil.isNumeric("") = true
* StringUtil.isNumeric(" ") = false
* StringUtil.isNumeric("123") = true
* StringUtil.isNumeric("12 3") = false
* StringUtil.isNumeric("ab2c") = false
* StringUtil.isNumeric("12-3") = false
* StringUtil.isNumeric("12.3") = false
*
*
*
*/
public static boolean isNumeric(String str) {
if (str == null) {
return false;
}
int length = str.length();
for (int i = 0; i < length; i++) {
if (!Character.isDigit(str.charAt(i))) {
return false;
}
}
return true;
}
public static final String EMPTY_STRING = "";
/**
*
* StringUtil.substringBeforeLast(null, *) = null
* StringUtil.substringBeforeLast("", *) = ""
* StringUtil.substringBeforeLast("abcba", "b") = "abc"
* StringUtil.substringBeforeLast("abc", "c") = "ab"
* StringUtil.substringBeforeLast("a", "a") = ""
* StringUtil.substringBeforeLast("a", "z") = "a"
* StringUtil.substringBeforeLast("a", null) = "a"
* StringUtil.substringBeforeLast("a", "") = "a"
*
*/
public static String substringBeforeLast(String str, String separator) {
if ((str == null) || (separator == null) || (str.length() == 0) || (separator.length() == 0)) {
return str;
}
int pos = str.lastIndexOf(separator);
if (pos == -1) {
return str;
}
return str.substring(0, pos);
}
/**
* StringUtil.substringAfterLast(null, *) = null
* StringUtil.substringAfterLast("", *) = ""
* StringUtil.substringAfterLast(*, "") = ""
* StringUtil.substringAfterLast(*, null) = ""
* StringUtil.substringAfterLast("abc", "a") = "bc"
* StringUtil.substringAfterLast("abcba", "b") = "a"
* StringUtil.substringAfterLast("abc", "c") = ""
* StringUtil.substringAfterLast("a", "a") = ""
* StringUtil.substringAfterLast("a", "z") = ""
*
*/
public static String substringAfterLast(String str, String separator) {
if ((str == null) || (str.length() == 0)) {
return str;
}
if ((separator == null) || (separator.length() == 0)) {
return EMPTY_STRING;
}
int pos = str.lastIndexOf(separator);
if ((pos == -1) || (pos == (str.length() - separator.length()))) {
return EMPTY_STRING;
}
return str.substring(pos + separator.length());
}
/**
* StringUtil.substringAfter(null, *) = null StringUtil.substringAfter("",
* *) = "" StringUtil.substringAfter(*, null) = ""
* StringUtil.substringAfter("abc", "a") = "bc"
* StringUtil.substringAfter("abcba", "b") = "cba"
* StringUtil.substringAfter("abc", "c") = ""
* StringUtil.substringAfter("abc", "d") = ""
* StringUtil.substringAfter("abc", "") = "abc"
*
*
*/
public static String substringAfter(String str, String separator) {
if ((str == null) || (str.length() == 0)) {
return str;
}
if (separator == null) {
return EMPTY_STRING;
}
int pos = str.indexOf(separator);
if (pos == -1) {
return EMPTY_STRING;
}
return str.substring(pos + separator.length());
}
/*
* ==========================================================================
* ==
*/
/*
* ==========================================================================
* ==
*/
/**
* StringUtil.substringBefore(null, *) = null StringUtil.substringBefore("",
* *) = "" StringUtil.substringBefore("abc", "a") = ""
* StringUtil.substringBefore("abcba", "b") = "a"
* StringUtil.substringBefore("abc", "c") = "ab"
* StringUtil.substringBefore("abc", "d") = "abc"
* StringUtil.substringBefore("abc", "") = ""
* StringUtil.substringBefore("abc", null) = "abc"
*
*/
public static String substringBefore(String str, String separator) {
if ((str == null) || (separator == null) || (str.length() == 0)) {
return str;
}
if (separator.length() == 0) {
return EMPTY_STRING;
}
int pos = str.indexOf(separator);
if (pos == -1) {
return str;
}
return str.substring(0, pos);
}
/**
*
* StringUtil.contains(null, *) = false
* StringUtil.contains(*, null) = false
* StringUtil.contains("", "") = true
* StringUtil.contains("abc", "") = true
* StringUtil.contains("abc", "a") = true
* StringUtil.contains("abc", "z") = false
*
*
*/
public static boolean contains(String str, String searchStr) {
if ((str == null) || (searchStr == null)) {
return false;
}
return str.indexOf(searchStr) >= 0;
}
public static String trim(String str) {
return trim(str, null, 0);
}
/**
*
* StringUtil.trim(null, *) = null
* StringUtil.trim("", *) = ""
* StringUtil.trim("abc", null) = "abc"
* StringUtil.trim(" abc", null) = "abc"
* StringUtil.trim("abc ", null) = "abc"
* StringUtil.trim(" abc ", null) = "abc"
* StringUtil.trim(" abcyx", "xyz") = " abc"
*
*
*
*/
private static String trim(String str, String stripChars, int mode) {
if (str == null) {
return null;
}
int length = str.length();
int start = 0;
int end = length;
if (mode <= 0) {
if (stripChars == null) {
while ((start < end) && (Character.isWhitespace(str.charAt(start)))) {
start++;
}
} else if (stripChars.length() == 0) {
return str;
} else {
while ((start < end) && (stripChars.indexOf(str.charAt(start)) != -1)) {
start++;
}
}
}
if (mode >= 0) {
if (stripChars == null) {
while ((start < end) && (Character.isWhitespace(str.charAt(end - 1)))) {
end--;
}
} else if (stripChars.length() == 0) {
return str;
} else {
while ((start < end) && (stripChars.indexOf(str.charAt(end - 1)) != -1)) {
end--;
}
}
}
if ((start > 0) || (end < length)) {
return str.substring(start, end);
}
return str;
}
/**
*
* StringUtil.isBlank(null) = false
* StringUtil.isBlank("") = false
* StringUtil.isBlank(" ") = false
* StringUtil.isBlank("bob") = true
* StringUtil.isBlank(" bob ") = true
*
*
*
*/
public static boolean isNotBlank(String str) {
int length;
if ((str == null) || ((length = str.length()) == 0)) {
return false;
}
for (int i = 0; i < length; i++) {
if (!Character.isWhitespace(str.charAt(i))) {
return true;
}
}
return false;
}
/**
*
* StringUtil.isBlank(null) = true
* StringUtil.isBlank("") = true
* StringUtil.isBlank(" ") = true
* StringUtil.isBlank("bob") = false
* StringUtil.isBlank(" bob ") = false
*
*
*
*/
public static boolean isBlank(String str) {
int length;
if ((str == null) || ((length = str.length()) == 0)) {
return true;
}
for (int i = 0; i < length; i++) {
if (!Character.isWhitespace(str.charAt(i))) {
return false;
}
}
return true;
}
/**
*
* * *
* StringUtil.split(null, *) = null
* StringUtil.split("", *) = []
* StringUtil.split("abc def", null) = ["abc", "def"]
* StringUtil.split("abc def", " ") = ["abc", "def"]
* StringUtil.split("abc def", " ") = ["abc", "def"]
* StringUtil.split(" ab: cd::ef ", ":") = ["ab", "cd", "ef"]
* StringUtil.split("abc.def", "") = ["abc.def"]
*
*
*
*
*
*/
public static String[] splitm(String str, String separatorChars) {
return split(str, separatorChars, -1);
}
public static final String[] EMPTY_STRING_ARRAY = new String[0];
/**
*
* * *
* StringUtil.split(null, *, *) = null
* StringUtil.split("", *, *) = []
* StringUtil.split("ab cd ef", null, 0) = ["ab", "cd", "ef"]
* StringUtil.split(" ab cd ef ", null, 0) = ["ab", "cd", "ef"]
* StringUtil.split("ab:cd::ef", ":", 0) = ["ab", "cd", "ef"]
* StringUtil.split("ab:cd:ef", ":", 2) = ["ab", "cdef"]
* StringUtil.split("abc.def", "", 2) = ["abc.def"]
*
*
*
*
*
*/
public static String[] split(String str, String separatorChars, int max) {
if (str == null) {
return null;
}
int length = str.length();
if (length == 0) {
return EMPTY_STRING_ARRAY;
}
List list = new ArrayList();
int sizePlus1 = 1;
int i = 0;
int start = 0;
boolean match = false;
if (separatorChars == null) {
while (i < length) {
if (Character.isWhitespace(str.charAt(i))) {
if (match) {
if (sizePlus1++ == max) {
i = length;
}
list.add(str.substring(start, i));
match = false;
}
start = ++i;
continue;
}
match = true;
i++;
}
} else if (separatorChars.length() == 1) {
char sep = separatorChars.charAt(0);
while (i < length) {
if (str.charAt(i) == sep) {
if (match) {
if (sizePlus1++ == max) {
i = length;
}
list.add(str.substring(start, i));
match = false;
}
start = ++i;
continue;
}
match = true;
i++;
}
} else {
while (i < length) {
if (separatorChars.indexOf(str.charAt(i)) >= 0) {
if (match) {
if (sizePlus1++ == max) {
i = length;
}
list.add(str.substring(start, i));
match = false;
}
start = ++i;
continue;
}
match = true;
i++;
}
}
if (match) {
list.add(str.substring(start, i));
}
return (String[]) list.toArray(new String[list.size()]);
}
}
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