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Improve performance of some string operations

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Issue: SPR-16293
This commit is contained in:
Juergen Hoeller
2018-01-19 19:05:07 +01:00
parent 0b77c8835c
commit d7959edb3e
5 changed files with 25 additions and 26 deletions
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spring-jdbc/src/main/java/org/springframework/jdbc/support/JdbcUtils.java
+7 -7
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@@ -481,24 +481,24 @@ public abstract class JdbcUtils {
StringBuilder result = new StringBuilder();
boolean nextIsUpper = false;
if (name != null && name.length() > 0) {
if (name.length() > 1 && name.substring(1, 2).equals("_")) {
result.append(name.substring(0, 1).toUpperCase());
if (name.length() > 1 && name.charAt(1) == '_') {
result.append(Character.toUpperCase(name.charAt(0)));
}
else {
result.append(name.substring(0, 1).toLowerCase());
result.append(Character.toLowerCase(name.charAt(0)));
}
for (int i = 1; i < name.length(); i++) {
String s = name.substring(i, i + 1);
if (s.equals("_")) {
char c = name.charAt(i);
if (c == '_') {
nextIsUpper = true;
}
else {
if (nextIsUpper) {
result.append(s.toUpperCase());
result.append(Character.toUpperCase(c));
nextIsUpper = false;
}
else {
result.append(s.toLowerCase());
result.append(Character.toLowerCase(c));
}
}
}