1.判断字符串长度是否为零
Assert.hasLength(encoding, "Encoding must not be empty");
public static void hasLength(String text, String message) {
if (!StringUtils.hasLength(text)) {
throw new IllegalArgumentException(message);
}
}
public static boolean hasLength(String str) {
return hasLength((CharSequence)str);
}
public static boolean hasLength(CharSequence str) {
return str != null && str.length() > 0;
}