将日期字符串解析为java.util.Date时，非法模式字符“T” [英] Illegal pattern character 'T' when parsing a date string to java.util.Date
本文介绍了将日期字符串解析为java.util.Date时，非法模式字符“T”的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
public static void main（String [] args）{
String date =2010-10-02T12：23：23Z;
String pattern =yyyy-MM-ddThh：mm：ssZ;
SimpleDateFormat sdf = new SimpleDateFormat（pattern）;
try {
Date d = sdf.parse（date）;
System.out.println（d.getYear（））;
} catch（ParseException e）{
// TODO自动生成的catch块
e.printStackTrace（）;
}
}
但是我收到了一个例外： java.lang.IllegalArgumentException：非法模式字符'T'
所以我想知道我是否必须拆分字符串并手动解析？
BTW，我已经尝试在T的任一侧添加单引号字符：
String pattern =yyyy-MM-dd'T'hh：mm：ssZ;
它也无效。
解决方案
这个输入与尾随的 Z 的输入一致，如下所示：
在模式中，$ code> T 在两边都以
'进行转义。
结束时
Z的模式实际上是XXX在JavaDoc forSimpleDateFormat中，只是不太清楚
实际上如何使用它，因为Z是旧的
TimeZone信息的标记。
Q2597083.java
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date
import java.util.GregorianCalendar;
import java.util.TimeZone;
public class Q2597083
{
/ **
*所有日期都按UTC标准化，它是将客户端代码转换为适当的TimeZone。
* /
public static final TimeZone UTC;
/ **
* @see< a href =http://en.wikipedia.org/wiki/ISO_8601#Combined_date_and_time_representations>组合日期和时间表示< / a> ;
* /
public static final String ISO_8601_24H_FULL_FORMAT =yyyy-MM-dd'T'HH：mm：ss.SSSXXX;
/ **
* 0001-01-01T00：00：00.000Z
* /
public static final日期BEGINNING_OF_TIME;
/ **
* 292278994-08-17T07：12：55.807Z
* /
public static final Date END_OF_TIME;
static
{
UTC = TimeZone.getTimeZone（UTC）;
TimeZone.setDefault（UTC）;
final Calendar c = new GregorianCalendar（UTC）;
c.set（1，0，1，0，0，0）;
c.set（Calendar.MILLISECOND，0）;
BEGINNING_OF_TIME = c.getTime（）;
c.setTime（new Date（Long.MAX_VALUE））;
END_OF_TIME = c.getTime（）;
}
public static void main（String [] args）throws异常
{
final SimpleDateFormat sdf = new SimpleDateFormat（ISO_8601_24H_FULL_FORMAT）;
sdf.setTimeZone（UTC）;
System.out.println（sdf.format（BEGINNING_OF_TIME）=+ sdf.format（BEGINNING_OF_TIME））;
System.out.println（sdf.format（END_OF_TIME）=+ sdf.format（END_OF_TIME））;
System.out.println（sdf.format（new Date（））=+ sdf.format（new Date（）））;
System.out.println（sdf.parse（\2015-04-28T14：23：38.521Z\）=+ sdf.parse（2015-04-28T14：23：38.521Z ））;
System.out.println（sdf.parse（\0001-01-01T00：00：00.000Z \）=+ sdf.parse（0001-01-01T00：00：00.000Z ））;
System.out.println（sdf.parse（\292278994-08-17T07：12：55.807Z\）=+ sdf.parse（292278994-08-17T07：12：55.807Z ））;
}
}
生成以下输出：
sdf.format（BEGINNING_OF_TIME）= 0001-01-01T00：00：00.000Z
sdf.format（END_OF_TIME）= 292278994-08- 17T07：12：55.807Z
sdf.format（new Date（））= 2015-04-28T14：38：25.956Z
sdf.parse（2015-04-28T14：23：38.521Z ）= Tue Apr 28 14:23:38 UTC 2015
sdf.parse（0001-01-01T00：00：00.000Z）= Sat Jan 01 00:00:00 UTC 1
sdf。 parse（292278994-08-17T07：12：55.807Z）= Sun Aug 17 07:12:55 UTC 292278994
I have a date string and I want to parse it to normal date use the java Date API,the following is my code:
public static void main(String[] args) {
String date="2010-10-02T12:23:23Z";
String pattern="yyyy-MM-ddThh:mm:ssZ";
SimpleDateFormat sdf=new SimpleDateFormat(pattern);
try {
Date d=sdf.parse(date);
System.out.println(d.getYear());
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
However I got an exception: java.lang.IllegalArgumentException: Illegal pattern character 'T'
So I wonder if I have to split the string and parse it manually?
BTW, I have tried to add a single quote character on either side of the T:
String pattern="yyyy-MM-dd'T'hh:mm:ssZ";
It also does not work.
解决方案
This works with the input with the trailing Z as demonstrated:
In the pattern the
Tis escaped with'on either side.The pattern for the
Zat the end is actuallyXXXas documented in the JavaDoc forSimpleDateFormat, it is just not very clear on actually how to use it sinceZis the marker for the oldTimeZoneinformation as well.
Q2597083.java
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TimeZone;
public class Q2597083
{
/**
* All Dates are normalized to UTC, it is up the client code to convert to the appropriate TimeZone.
*/
public static final TimeZone UTC;
/**
* @see <a href="http://en.wikipedia.org/wiki/ISO_8601#Combined_date_and_time_representations">Combined Date and Time Representations</a>
*/
public static final String ISO_8601_24H_FULL_FORMAT = "yyyy-MM-dd'T'HH:mm:ss.SSSXXX";
/**
* 0001-01-01T00:00:00.000Z
*/
public static final Date BEGINNING_OF_TIME;
/**
* 292278994-08-17T07:12:55.807Z
*/
public static final Date END_OF_TIME;
static
{
UTC = TimeZone.getTimeZone("UTC");
TimeZone.setDefault(UTC);
final Calendar c = new GregorianCalendar(UTC);
c.set(1, 0, 1, 0, 0, 0);
c.set(Calendar.MILLISECOND, 0);
BEGINNING_OF_TIME = c.getTime();
c.setTime(new Date(Long.MAX_VALUE));
END_OF_TIME = c.getTime();
}
public static void main(String[] args) throws Exception
{
final SimpleDateFormat sdf = new SimpleDateFormat(ISO_8601_24H_FULL_FORMAT);
sdf.setTimeZone(UTC);
System.out.println("sdf.format(BEGINNING_OF_TIME) = " + sdf.format(BEGINNING_OF_TIME));
System.out.println("sdf.format(END_OF_TIME) = " + sdf.format(END_OF_TIME));
System.out.println("sdf.format(new Date()) = " + sdf.format(new Date()));
System.out.println("sdf.parse(\"2015-04-28T14:23:38.521Z\") = " + sdf.parse("2015-04-28T14:23:38.521Z"));
System.out.println("sdf.parse(\"0001-01-01T00:00:00.000Z\") = " + sdf.parse("0001-01-01T00:00:00.000Z"));
System.out.println("sdf.parse(\"292278994-08-17T07:12:55.807Z\") = " + sdf.parse("292278994-08-17T07:12:55.807Z"));
}
}
Produces the following output:
sdf.format(BEGINNING_OF_TIME) = 0001-01-01T00:00:00.000Z
sdf.format(END_OF_TIME) = 292278994-08-17T07:12:55.807Z
sdf.format(new Date()) = 2015-04-28T14:38:25.956Z
sdf.parse("2015-04-28T14:23:38.521Z") = Tue Apr 28 14:23:38 UTC 2015
sdf.parse("0001-01-01T00:00:00.000Z") = Sat Jan 01 00:00:00 UTC 1
sdf.parse("292278994-08-17T07:12:55.807Z") = Sun Aug 17 07:12:55 UTC 292278994
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