正则表达式 - 用大写替换下划线小写 [英] regex - replace underscore lowercase with uppercase

问题描述

我想知道是否有一个正则表达式模式，我可以用它将一个下划线和一个小写字母转换成一个大写字母。我正在尝试从SQL语句为java bean生成字段名。目前数据库列是

I've wondering is there a regex pattern that i could use to convert a pattern which is an underscore and a lowercase letter into an uppercase letter. I'm trying to generate fieldnames for a java bean from a SQL statement. At the moment the DB columns are

load_id,policy_id,policy_number

但我希望java字段名称为

but i would like to the java field names to be

loadId,policyId,policyNumber

我试过这个正则表达式小提琴

推荐答案

您可以使用：

String s = "load_id,policy_id,policy_number";
Pattern p = Pattern.compile( "_([a-zA-Z])" );
Matcher m = p.matcher( s );
StringBuffer sb = new StringBuffer();
while (m.find()) {
    m.appendReplacement(sb, m.group(1).toUpperCase());
}
m.appendTail(sb);
System.out.println(sb.toString()); // loadId,policyId,policyNumber

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