我有这段代码,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
错误我得到了:
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)
答案 0 :(得分:4)
(感谢汤姆的建议)
这很可能是Locale
问题:如果您的默认Locale
无法识别'Sun'和'Apr',则DateTimeFormatter
会抛出IllegalArgumentException
。
您可以使用withLocale(Locale locale)
:
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"));
}
答案 1 :(得分:3)
这是有效的。试试这个。
String dateTime = "Sun, 18 Apr 2004 02:32:43";
// Format for input
DateTimeFormatter dtf = DateTimeFormat.forPattern("EEE, dd MMM yyyy kk:mm:ss");
// Parsing the date
System.out.println(dtf.parseDateTime(dateTime));
// Format for output
DateTimeFormatter dtfOut = DateTimeFormat.forPattern("EEE, dd MMM yyyy kk:mm:ss");
// Printing the date
System.out.println(dtfOut.parseDateTime(dateTime));
答案 2 :(得分:1)
org.joda.time.format.DateTimeFormatter dtf = DateTimeFormat.forPattern("EEE, dd MMM yyyy kk:mm:ss");
使用org.joda.time.format.DateTimeFormatter dtf = DateTimeFormat.forPattern("EEE, dd MMM yyyy hh:mm:ss");
kk - > HH 强>