/**
* 转成大写字符
*
* @param source
* @return
*/
public static String UpperCase(String source) {
if (StringUtil.isEmpty(source)) {
return "";
}
return source.toUpperCase();
}
/**
* 转下划线模式为大小写模式(大写开头)(下划线后第一个字母改为大写，首字母大写其余全小写)
*
* @param source
* @return
*/
public static String HeadUpperCase(String source) {
if (StringUtil.isEmpty(source)) {
return "";
}
StringBuilder sb = new StringBuilder();
sb.append(upperCase(source.substring(0, 1))).append(source.substring(1));
return sb.toString();
}
/**
* 转下划线模式为大小写模式(小写开头)(下划线后第一个字母改为大写，其余全小写)
*
* @param source
* @return
*/
public static String camelLowerCase(String source) {
if (StringUtil.isEmpty(source)) {
return "";
}
String[] parts = split(source, "_");
StringBuilder sb = new StringBuilder();
for (String part : parts) {
sb.append(capitalize(lowerCase(part)));
}
return uncapitalize(sb.toString());
}
/**
* 格式化数字
*
* @param str
* @param pattern
* @return
*/
public static String toDecimalFormat(String str, String pattern) {
if (StringUtil.isEmpty(pattern)) {
return str;
}
DecimalFormat fmt = new DecimalFormat(pattern);
fmt.setGroupingUsed(true);
String outStr = null;
double d;
try {
d = Double.parseDouble(str);
outStr = fmt.format(d);
} catch (Exception e) {
}
return outStr;
}
/**
* 转大小写模式为小写下划线模式(非首大写转下划线，全小写)
*
* @param source
* @return
*/
public static String unCamelLowerCase(String source) {
if (StringUtil.isEmpty(source)) {
return "";
}
String[] parts = split(source, "_");
StringBuilder sb = new StringBuilder();
for (String part : parts) {
sb.append(capitalize(part));
}
source = capitalize(sb.toString());
Pattern p = Pattern.compile("([A-Z]?[a-z0-9]*)");
Matcher m = p.matcher(source);
sb = new StringBuilder();
while (m.find()) {
sb.append(lowerCase(m.group())).append("_");
}
return substringBefore(sb.toString(), "__");
}
