我有这段代码,但不知道为什么它不起作用
String dateTime = "Sun, 18 Apr 2004 02:32:43";
// Format for input
org.joda.time.format.DateTimeFormatter dtf = DateTimeFormat.forPattern("EEE, dd MMM yyyy kk:mm:ss");
// Parsing the date
DateTime jodatime = dtf.parseDateTime(dateTime);
// Format for output
org.joda.time.format.DateTimeFormatter dtfOut = DateTimeFormat.forPattern("dd MMM yyyy kk:mm:ss");
// Printing the date
我得到的错误:
Exception in thread "main" java.lang.IllegalArgumentException: Invalid format: "Sun, 18 Apr 2004 02:32:43"
at org.joda.time.format.DateTimeFormatter.parseDateTime(DateTimeFormatter.java:945)
at com.jbd.WeirdCutEmails.test(WeirdCutEmails.java:69)
at com.jbd.WeirdCutEmails.main(WeirdCutEmails.java:108)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
最佳答案
(感谢 Tom 的建议)
这很可能是 Locale
问题:如果您的默认 Locale
无法识别“Sun”和“Apr”,那么 DateTimeFormatter
将抛出一个 IllegalArgumentException
。
您可以使用 withLocale(Locale locale)
来解决这个问题:
DateTimeFormat.forPattern("EEE, dd MMM yyyy kk:mm:ss")
.withLocale(Locale.ENGLISH)
插图:
@Before
public void setUp() throws Exception {
Locale.setDefault(new Locale("pt", "BR"));
}
@Test(expected = IllegalArgumentException.class)
public void testDefaultFormatterWontParseDifferentLocale() {
//arrange
DateTimeFormatter dtf = DateTimeFormat.forPattern("EEE, dd MMM yyyy kk:mm:ss");
//act
dtf.parseDateTime("Sun, 18 Apr 2004 02:32:43"); //won't parse as expecting a String in Portuguese Locale
}
@Test
public void testFormatterWithSuppliedLocale() {
//arrange
DateTimeFormatter dtf = DateTimeFormat
.forPattern("EEE, dd MMM yyyy kk:mm:ss")
.withLocale(Locale.ENGLISH);
//act
DateTime actualDateTime = dtf.parseDateTime("Sun, 18 Apr 2004 02:32:43");
//assert
Assert.assertEquals(new DateTime(2004,4,18,2,32,43), actualDateTime);
}
@After
public void tearDown() throws Exception {
Locale.setDefault(new Locale("en","US"));
}
关于java - Joda Time ,解析不起作用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40673212/