如何在java中将字符串日期转换为时间戳？
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How to convert string date to Timestamp in java?
提问by lakshmi
I want to convert string Date into Timestamp in java. The following coding i have written.I have declare the date for date1 is: 7-11-11 12:13:14.
我想在java中将字符串日期转换为时间戳。我编写的以下代码。我已声明 date1 的日期是：7-11-11 12:13:14。
SimpleDateFormat datetimeFormatter1 = new SimpleDateFormat(
"yyyy-MM-dd hh:mm:ss");
Date lFromDate1 = datetimeFormatter1.parse(date1);
System.out.println("gpsdate :" + lFromDate1);
Timestamp fromTS1 = new Timestamp(lFromDate1.getTime());
I want to convert 7-11-11 12:13:14 this string date into timestamp. Now i got the output is 0007-11-11 00:13:14.000000 +05:30:00 but i want ( 7-11-11 12:13:14) this format Timestamp date. Can anyone please help me. Thank you.
我想将 7-11-11 12:13:14 这个字符串日期转换成时间戳。现在我得到的输出是 0007-11-11 00:13:14.000000 +05:30:00 但我想要（7-11-11 12:13:14）这种格式的时间戳日期。谁能帮帮我吗。谢谢你。
采纳答案by Glen Robertson
All you need to do is change the string within the java.text.SimpleDateFormatconstructor to:
"MM-dd-yyyy HH:mm:ss".
您需要做的就是将java.text.SimpleDateFormat构造函数中的字符串更改为：“MM-dd-yyyy HH:mm:ss”。
Just use the appropriate letters to build the above string to match your input date.
只需使用适当的字母来构建上述字符串以匹配您的输入日期。
回答by MeBigFatGuy
Use capital HHto get hour of day format, instead of am/pm hours
使用大写HH来获取一天中的小时格式，而不是 am/pm 小时
回答by Sireesh Yarlagadda
You can even try this.
你甚至可以试试这个。
String date="09/08/1980"; // take a string date
Timestamp ts=null; //declare timestamp
Date d=new Date(date); // Intialize date with the string date
if(d!=null){ // simple null check
ts=new java.sql.Timestamp(d.getTime()); // convert gettime from date and assign it to your timestamp.
}
回答by Basil Bourque
tl;dr
tl;博士
java.sql.Timestamp
.valueOf( // Class-method parses SQL-style formatted date-time strings.
"2007-11-11 12:13:14"
) // Returns a `Timestamp` object.
.toInstant() // Converts from terrible legacy classes to modern *java.time* class.
java.sql.Timestamp.valueOfparses SQL format
java.sql.Timestamp.valueOf解析 SQL 格式
If you can use the full four digits for the year, your input string of 2007-11-11 12:13:14would be in standard SQL format assuming this value is meant to be in UTC time zone.
如果您可以使用完整的四位数作为年份，则您的输入字符串2007-11-11 12:13:14将采用标准 SQL 格式，假设该值是在 UTC 时区。
The java.sql.Timestampclass has a valueOfmethod to directly parse such strings.
的java.sql.Timestamp类有一个valueOf直接解析这样的字符串的方法。
String input = "2007-11-11 12:13:14" ;
java.sql.Timestamp ts = java.sql.Timestamp.valueOf( input ) ;
java.time
时间
In Java 8 and later, the java.time framework makes it easier to verify the results. The j.s.Timestamp class has a nasty habit of implicitly applying your JVM's current default timestamp when generating a string representation via its toStringmethod. In contrast, the java.time classes by default use the standard ISO 8601formats.
在 Java 8 及更高版本中，java.time 框架可以更轻松地验证结果。jsTimestamp 类有一个坏习惯，即在通过其toString方法生成字符串表示时隐式应用 JVM 的当前默认时间戳。相比之下，java.time 类默认使用标准ISO 8601格式。
System.out.println( "Output: " + ts.toInstant().toString() );
回答by Jenya Miachyn
You can convert String to Timestamp:
您可以将字符串转换为时间戳：
String inDate = "01-01-1990"
DateFormat df = new SimpleDateFormat("MM-dd-yyyy");
Timestamp ts = new Timestamp(((java.util.Date)df.parse(inDate)).getTime());
回答by Navdeep Ghotra
Use below code to convert String Date to Epoc Timestamp. Note : - Your input Date format should match with SimpleDateFormat.
使用以下代码将字符串日期转换为 Epoc 时间戳。注意： - 您的输入日期格式应与 SimpleDateFormat 匹配。
String inputDateInString= "8/15/2017 12:00:00 AM";
SimpleDateFormat dateFormat = new SimpleDateFormat("MM/dd/yyy hh:mm:ss");
Date parsedDate = dateFormat.parse("inputDateInString");
Timestamp timestamp = new java.sql.Timestamp(parsedDate.getTime());
System.out.println("Timestamp "+ timestamp.getTime());
