simpledateformat

SimpleDateFormat not parsing time correctly [duplicate]

由 ♀尐吖头ヾ 提交于 2020-01-16 18:10:07
问题 This question already has answers here : Changing Java Timestamp format causes a change of the timestamp (2 answers) Java / convert ISO-8601 (2010-12-16T13:33:50.513852Z) to Date object (4 answers) Date object SimpleDateFormat not parsing timestamp string correctly in Java (Android) environment (6 answers) Closed 11 months ago . This is happening with one (probably more) datetime where the time part is totally wrong in a parse. The code: import java.text.*; import java.util.*; public class

SimpleDateFormat not parsing time correctly [duplicate]

由 ▼魔方 西西 提交于 2020-01-16 18:09:25
问题 This question already has answers here : Changing Java Timestamp format causes a change of the timestamp (2 answers) Java / convert ISO-8601 (2010-12-16T13:33:50.513852Z) to Date object (4 answers) Date object SimpleDateFormat not parsing timestamp string correctly in Java (Android) environment (6 answers) Closed 11 months ago . This is happening with one (probably more) datetime where the time part is totally wrong in a parse. The code: import java.text.*; import java.util.*; public class

simpleDateFormat方法

由 岁酱吖の 提交于 2020-01-15 00:43:13
// date:时间类,用java.util.Date Date date=new Date(); System.out.println(date); //SimpleDateFormat:实现日期的格式化 //format():把时间转成字符串 SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String date1=sdf.format(date); System.out.println(date1); Tue Jan 14 15:18:29 CST 2020 2020-01-14 15:18:29 来源： CSDN 作者： 只伸头的乌龟 链接： https://blog.csdn.net/qq_42435859/article/details/103973818

Java 日期计算

由 随声附和 提交于 2020-01-14 13:20:54
Java 计算日期加、减一天 方法一 SimpleDateFormat newdate = new SimpleDateFormat("HH:mm:ss");//设置时间格式 String time1 = newdate.format(new Date());//获取当前系统时间 String time2= "00:00:00";//大于时间 String time3= "15:59:59";//小于时间 Date dt1 = newdate.parse(time1); Date dt2 = newdate.parse(time2); Date dt3 = newdate.parse(time3); if(dt2.getTime() < dt1.getTime() || dt1.getTime() <dt3.getTime()) { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); Date date = new Date(); Calendar rightNow = Calendar.getInstance(); rightNow.add(Calendar.DATE,-2);//当前时间减2天 Date dt8 = rightNow.getTime(); newRQ = sdf.format(dt8);

涉及到日期的跨年事故

由 爷，独闯天下 提交于 2020-01-14 11:36:37
1 public static void main(String[] args) { 2 Calendar calendar = Calendar.getInstance(); 3 // 2019-12-31 4 calendar.set(2019, Calendar.DECEMBER, 31); 5 Date strDate1 = calendar.getTime(); 6 // 2020-01-01 7 calendar.set(2020, Calendar.JANUARY, 1); 8 Date strDate2 = calendar.getTime(); 9 SimpleDateFormat formatYYYY = new SimpleDateFormat("YYYY/MM/dd"); 10 System.out.println("2019-12-31 转 YYYY/MM/dd 格式: " + formatYYYY.format(strDate1)); 11 System.out.println("2020-01-01 转 YYYY/MM/dd 格式: " + formatYYYY.format(strDate2)); 12 } 年份由YYYY-->yyyy jDK6的SimpleDateFormat只有小“y”,没有大“Y”。JDK7开始引入了大“Y”，表示Week

Java add dates of format dd:HH:mm:ss

由 本秂侑毒 提交于 2020-01-14 03:28:11
问题 I have three dates as String objects in the format: dd:HH:mm:ss 00:1:9:14 00:3:10:4 00:3:39:49 How do I add these dates in Java to get the sum ( 00:7:59:07 )? Sample code: SimpleDateFormat sdf = new SimpleDateFormat("dd:HH:mm:ss"); Date d1 = sdf.parse("00:1:9:14"); Date d2 = sdf.parse("00:3:10:4"); Date d3 = sdf.parse("00:3:39:49"); System.out.println(d1); System.out.println(d2); System.out.println(d3); Date d = new Date(d1.getTime() + d2.getTime() + d3.getTime()); System.out.println(d);

利用Servlet生成动态页面

由 孤人 提交于 2020-01-13 01:54:00
创建Web项目HelloServletWorld 在web目录里创建首页文件index.html 在src目录里创建net.xmh.servlet包，在里面创建HelloServletWorld类 package net.cw.servlet; import javax.servlet.ServletException; import javax.servlet.annotation.WebInitParam; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.io.PrintWriter; import java.text.SimpleDateFormat; import java.util.Date; @WebServlet(name = "HelloServletWorld", value = "/hello", initParams = { @WebInitParam(name =

Convert SimpleDateFormat to DateTimeFormatter

由 旧城冷巷雨未停 提交于 2020-01-12 13:52:06
问题 So when trying to replace some legacy code using SimpleDateFormat and Date, to use java.time.DateTimeFormatter and LocalDate I ran into a problem. The two date formats are not equivalent. At this point I must say I know the two date types are not the same but the scenario I am in means I never care about the time aspect so can ignore it. public Date getDate(String value) { SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy"); try { return dateFormat.parse(value); } catch

Convert SimpleDateFormat to DateTimeFormatter

由 守給你的承諾、 提交于 2020-01-12 13:51:19
问题 So when trying to replace some legacy code using SimpleDateFormat and Date, to use java.time.DateTimeFormatter and LocalDate I ran into a problem. The two date formats are not equivalent. At this point I must say I know the two date types are not the same but the scenario I am in means I never care about the time aspect so can ignore it. public Date getDate(String value) { SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy"); try { return dateFormat.parse(value); } catch

Thread safety issue with SimpleDateFormat

由 爱⌒轻易说出口 提交于 2020-01-12 08:22:30
问题 I got the following piece of code from a programmers test private String formatDate(Date date) { String result = ""; //…. SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); result = sdf.format(date); //… return result; } with the additional information that several threads are using the method at once. Are there any problems with this? My answer is that no, it should be fine (assuming that nothing else is going on in the //... parts). My motivation is that no global or class data
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