static final char UNDER_LINE = '_';
public static void main(String[] args) {
// 下划线转驼峰
String source = "income_ratio";
String target = toCase(source);
System.out.println("target = " + target);
}
static String toCase(String source) {
if (source == null || source.trim().isEmpty()) {
return null;
}
StringBuilder target = new StringBuilder();
char[] charSourceArray = source.toCharArray();
char[] chartargeteArray1 = new char[charSourceArray.length];
char[] chartargeteArray2 = chartargeteArray1.clone();
for (int i = 0; i < charSourceArray.length; i++) {
// char值是否为数字
if (Character.isDigit(charSourceArray[i])) {
continue;
}
// char值是否为空格
if (Character.isWhitespace(charSourceArray[i])) {
continue;
}
// 如果是下划线,下划线后的字母转大写字母,否则都为小写字母
chartargeteArray1[i] = UNDER_LINE == charSourceArray[i] ? Character.toUpperCase(charSourceArray[i + 1]) : Character.toLowerCase(charSourceArray[i]);
}
for (int i = 0; i < chartargeteArray1.length; i++) {
if (i >= 1) {
// char值是否为大写字母
if (Character.isUpperCase(chartargeteArray1[i - 1])) {
continue;
}
}
chartargeteArray2[i] = chartargeteArray1[i];
target.append(chartargeteArray2[i]);
}
return target.toString();
}
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只是简单的小练习,未考虑到边界值问题
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target = incomeRatio
