From 2727004b7a4ed275c5f0e473a1f8feba4ac8149a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9C=A8=E5=85=83?=
 <11529698+wooden-yuan@user.noreply.gitee.com>
Date: Mon, 22 Jan 2024 03:53:54 +0000
Subject: [PATCH] =?UTF-8?q?add=20=E5=AE=9E=E7=94=A8=E5=B0=8F=E5=B7=A5?=
 =?UTF-8?q?=E5=85=B7/StrUtils.?=
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Signed-off-by: 木元 <11529698+wooden-yuan@user.noreply.gitee.com>
---
 .../StrUtils"                                 | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 "\345\256\236\347\224\250\345\260\217\345\267\245\345\205\267/StrUtils"

diff --git "a/\345\256\236\347\224\250\345\260\217\345\267\245\345\205\267/StrUtils" "b/\345\256\236\347\224\250\345\260\217\345\267\245\345\205\267/StrUtils"
new file mode 100644
index 0000000..0aa9303
--- /dev/null
+++ "b/\345\256\236\347\224\250\345\260\217\345\267\245\345\205\267/StrUtils"
@@ -0,0 +1,51 @@
+
+
+public class StrUtils {
+
+    /**
+     * 高性能的Split，针对char的分隔符号，比JDK String自带的高效.
+     * <p>
+     * copy from Commons Lange 3.5 StringUtils, 做如下优化:
+     * <p>
+     * 1. 最后不做数组转换，直接返回List.
+     * <p>
+     * 2. 可设定List初始大小.
+     * <p>
+     * 3. preserveAllTokens 取默认值false
+     *
+     * @param expectParts 预估分割后的List大小，初始化数据更精准
+     * @return 如果为null返回null, 如果为""返回空数组
+     */
+    public static List<String> split(final String str, final char separatorChar, int expectParts) {
+        if (str == null) {
+            return Lists.newArrayList();
+        }
+
+        final int len = str.length();
+        if (len == 0) {
+            return Lists.newArrayList();
+        }
+
+        final List<String> list = new ArrayList<>(expectParts);
+        int i = 0;
+        int start = 0;
+        boolean match = false;
+        while (i < len) {
+            if (str.charAt(i) == separatorChar) {
+                if (match) {
+                    list.add(str.substring(start, i));
+                    match = false;
+                }
+                start = ++i;
+                continue;
+            }
+            match = true;
+            i++;
+        }
+        if (match) {
+            list.add(str.substring(start, i));
+        }
+        return list;
+    }
+
+}
-- 
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