java - 字符串标记化

Question

我想将字符串标记private String requestDate="12/12/2012 02:02:23 AM";为

12122012_020223am_

如何使用 stringTokenizer 实现这一点？

问候，

Answer 1

requestDate = requestDate.replaceAll("/", "");
requestDate = requestDate.replaceAll(" ", "_");
requestDate = requestDate.replaceAll(":", "");

会给你12122012_020223_AM

然后 requestDate = requestDate.toLowerCase()

会给12122012_020223_am

Answer 2

使用SimpleDateFormat：

Date date = new SimpleDateFormat("MM/dd/yyyy hh:mm:ss a").parse(requestDate);
String output = new SimpleDateFormat("MMddyyyy_hhmmssa_").format(date);
output = output.toLowerCase();

Answer 3

如果你想要 StringTokenise 这样的事情应该这样做

@Test
public void test() {
    StringTokenizer stringTokenizer = new StringTokenizer("ab/c/d EF", "/");
    StringBuilder b = new StringBuilder();
    while (stringTokenizer.hasMoreTokens()) {
        StringTokenizer stringTokenizer2 = new StringTokenizer(stringTokenizer.nextToken(), " ");
        while (stringTokenizer2.hasMoreTokens()) {
            b.append(stringTokenizer2.nextToken().toLowerCase());
            b.append("_");
        }
    }
    assertEquals("ab_c_d_ef_", b.toString());
}

StringTokenizer构造函数之一采用字符串和分隔符