时间戳测试

12189108 · Nov 25, 2017 · 79de0de · 79de0de
1 parent c40caf8
commit 79de0de
Show file tree

Hide file tree

Showing 8 changed files with 221 additions and 0 deletions.
diff --git a/.gitignore b/.gitignore
@@ -149,3 +149,12 @@ springboottest/springboottest9/.idea/libraries/Maven__org_springframework_spring
 springboottest/springboottest9/.idea/libraries/Maven__org_springframework_spring_web_4_3_9_RELEASE.xml
 springboottest/springboottest9/.idea/libraries/Maven__org_springframework_spring_webmvc_4_3_9_RELEASE.xml
 springboottest/springboottest9/.idea/libraries/Maven__org_yaml_snakeyaml_1_17.xml
+javabasicstest/test29/.idea/.name
+javabasicstest/test29/.idea/compiler.xml
+javabasicstest/test29/.idea/encodings.xml
+javabasicstest/test29/.idea/kotlinc.xml
+javabasicstest/test29/.idea/misc.xml
+javabasicstest/test29/.idea/modules.xml
+javabasicstest/test29/.idea/workspace.xml
+javabasicstest/test29/.idea/libraries/Maven__joda_time_joda_time_2_6.xml
+javabasicstest/test29/.idea/libraries/Maven__junit_junit_3_8_1.xml
diff --git a/javabasicstest/test29/test1/.gitignore b/javabasicstest/test29/test1/.gitignore
@@ -0,0 +1 @@
+/target/
diff --git a/javabasicstest/test29/test1/pom.xml b/javabasicstest/test29/test1/pom.xml
@@ -0,0 +1,42 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.jsoft.testjavabasics</groupId>
+    <artifactId>test1</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+    <packaging>jar</packaging>
+
+    <name>test1</name>
+    <url>http://maven.apache.org</url>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>3.8.1</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>joda-time</groupId>
+            <artifactId>joda-time</artifactId>
+            <version>2.6</version>
+        </dependency>
+    </dependencies>
+</project>
diff --git a/javabasicstest/test29/test1/src/main/java/com/jsoft/testjavabasics/test1/App.java b/javabasicstest/test29/test1/src/main/java/com/jsoft/testjavabasics/test1/App.java
@@ -0,0 +1,42 @@
+package com.jsoft.testjavabasics.test1;
+
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Date;
+
+/**
+ * Hello world!
+ * @author jim
+ * @date 2017/11/25
+ */
+public class App {
+    public static void main(String[] args) {
+        // 精确到毫秒
+        // 获取当前时间戳
+        System.out.println(System.currentTimeMillis());
+        System.out.println(Calendar.getInstance().getTimeInMillis());
+        System.out.println(new Date().getTime());
+
+        // 精确到秒
+        // 获取当前时间戳
+        System.out.println(System.currentTimeMillis() / 1000);
+        System.out.println(Calendar.getInstance().getTimeInMillis() / 1000);
+        System.out.println(new Date().getTime() / 1000);
+
+        // 精确到毫秒
+        // 获取指定格式的时间
+        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:SSS");
+        // 输出字符串
+        System.out.println(df.format(new Date()));
+        // 获取指定时间Date对象，参数是时间戳，只能精确到秒
+        System.out.println(new Date(1510369871));
+        df.getCalendar();
+        // 获取指定时间的时间戳
+        try {
+            System.out.println(new SimpleDateFormat("yyyy/MM/dd HH:mm:ss:SSS").parse("2017/11/11 11:11:11:111").getTime());
+        } catch (ParseException e) {
+            e.printStackTrace();
+        }
+    }
+}
diff --git a/javabasicstest/test29/test1/src/main/java/com/jsoft/testjavabasics/test1/TimeApp.java b/javabasicstest/test29/test1/src/main/java/com/jsoft/testjavabasics/test1/TimeApp.java
@@ -0,0 +1,51 @@
+package com.jsoft.testjavabasics.test1;
+
+import org.joda.time.LocalDate;
+import org.joda.time.format.DateTimeFormat;
+import org.joda.time.format.DateTimeFormatter;
+
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Date;
+
+
+/**
+ * This is Description
+ *
+ * @author jim
+ * @date 2017/11/25
+ */
+public class TimeApp {
+    public static void main(String[] args) {
+        // Java 7及之前版本
+        // 使用java.util.Calendar（不推荐）
+        Date date = null;
+        try {
+            date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse("2015-09-17 20:27:00");
+        } catch (ParseException e) {
+            e.printStackTrace();
+        }
+        Calendar now = Calendar.getInstance();
+        now.setTime(date);
+
+        int year = now.get(Calendar.YEAR);
+        int month = now.get(Calendar.MONTH) + 1; // 0-based!
+        int day = now.get(Calendar.DAY_OF_MONTH);
+
+        System.out.println("year: " + year);
+        System.out.println("month: " + month);
+        System.out.println("day: " + day);
+
+        // 时间已经改变，输出时间戳，可以看出这个是全局的，所以不建议使用全局的，直接使用时重新创建一个new SimpleDateFormat().getCalendar()
+        System.out.println(now.getTimeInMillis());
+
+        // joda-time（推荐），第三方库
+        DateTimeFormatter formatter = DateTimeFormat.forPattern("YYYY-MM-dd HH:mm:ss");
+        LocalDate localDate = formatter.parseLocalDate("2015-09-17 20:27:00");
+
+        System.out.println("yearOfCentury: " + localDate.getYearOfCentury());
+        System.out.println("monthOfYear: " + localDate.getMonthOfYear());
+        System.out.println("dayOfMonth: " + localDate.getDayOfMonth());
+    }
+}
diff --git a/javabasicstest/test29/test1/src/main/java/com/jsoft/testjavabasics/test1/TimeApp2.java b/javabasicstest/test29/test1/src/main/java/com/jsoft/testjavabasics/test1/TimeApp2.java
@@ -0,0 +1,22 @@
+package com.jsoft.testjavabasics.test1;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
+/**
+ * This is Description
+ *
+ * @author jim
+ * @date 2017/11/25
+ */
+public class TimeApp2 {
+    public static void main(String[] args) {
+        // Java 8，直接使用new datetime api （推荐！！）
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
+        LocalDateTime ldt = LocalDateTime.parse("2015-09-17 20:27:00", formatter);
+
+        System.out.println("Year: " + ldt.getYear());
+        System.out.println("Month: " + ldt.getMonth().getValue());
+        System.out.println("DayOfMonth: " + ldt.getDayOfMonth());
+    }
+}
diff --git a/javabasicstest/test29/test1/src/test/java/com/jsoft/testjavabasics/test1/AppTest.java b/javabasicstest/test29/test1/src/test/java/com/jsoft/testjavabasics/test1/AppTest.java
@@ -0,0 +1,38 @@
+package com.jsoft.testjavabasics.test1;
+
+import junit.framework.Test;
+import junit.framework.TestCase;
+import junit.framework.TestSuite;
+
+/**
+ * Unit test for simple App.
+ */
+public class AppTest 
+    extends TestCase
+{
+    /**
+     * Create the test case
+     *
+     * @param testName name of the test case
+     */
+    public AppTest( String testName )
+    {
+        super( testName );
+    }
+
+    /**
+     * @return the suite of tests being tested
+     */
+    public static Test suite()
+    {
+        return new TestSuite( AppTest.class );
+    }
+
+    /**
+     * Rigourous Test :-)
+     */
+    public void testApp()
+    {
+        assertTrue( true );
+    }
+}
diff --git a/javabasicstest/test29/test1/test1.iml b/javabasicstest/test29/test1/test1.iml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" scope="TEST" name="Maven: junit:junit:3.8.1" level="project" />
+    <orderEntry type="library" name="Maven: joda-time:joda-time:2.6" level="project" />
+  </component>
+</module>