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我想用maven構建一個java項目。我通過mvn -v
檢查Maven的命令,並讓下面的輸出爲什麼maven編譯失敗?
Apache Maven 3.3.9 (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-10T18:41:47+02:00)
Maven home: C:\Program Files\Apache\Maven\apache-maven-3.3.9\bin\..
Java version: 1.8.0_101, vendor: Oracle Corporation
Java home: C:\Program Files\Java\jdk1.8.0_101\jre
Default locale: en_US, platform encoding: Cp1252
OS name: "windows 10", version: "10.0", arch: "amd64", family: "dos"
我添加org.joda.time.LocalTime
到HelloWorld.java
如下
package hello;
import org.joda.time.LocalTime;
public class HelloWorld {
public static void main(String[] args) {
LocalTime currentTime = new LocalTime();
System.out.println("The current local time is: " + currentTime);
Greeter greeter = new Greeter();
System.out.println(greeter.sayHello());
}
}
所以我添加joda-time
依賴我pom.xml
。這是我pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.springframework</groupId>
<artifactId>gs-maven</artifactId>
<packaging>jar</packaging>
<version>0.1.0</version>
<dependencies>
<!-- tag::joda[] -->
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>2.2</version>
</dependency>
<!-- end::joda[] -->
<!-- tag::junit[] -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<!-- end::junit[] -->
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.1</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>hello.HelloWorld</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
每當我要運行它給人的輸出mvn compile
作爲
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building gs-maven 0.1.0
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ gs-maven ---
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory H:\Projects\JAVA\web\unzipped\gs-maven\initial\src\main\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ gs-maven ---
[INFO] Changes detected - recompiling the module!
[WARNING] File encoding has not been set, using platform encoding Cp1252, i.e. build is platform dependent!
[INFO] Compiling 2 source files to H:\Projects\JAVA\web\unzipped\gs-maven\initial\target\classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /H:/Projects/JAVA/web/unzipped/gs-maven/initial/src/main/java/hello/HelloWorld.java:[3,21] package org.joda.time does not exist
[ERROR] /H:/Projects/JAVA/web/unzipped/gs-maven/initial/src/main/java/hello/HelloWorld.java:[7,9] cannot find symbol
symbol: class LocalTime
location: class hello.HelloWorld
[ERROR] /H:/Projects/JAVA/web/unzipped/gs-maven/initial/src/main/java/hello/HelloWorld.java:[7,37] cannot find symbol
symbol: class LocalTime
location: class hello.HelloWorld
[INFO] 3 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.647 s
[INFO] Finished at: 2016-10-03T09:11:07+03:00
[INFO] Final Memory: 14M/114M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project gs-maven: Compilation failure: Compilation failure:
[ERROR] /H:/Projects/JAVA/web/unzipped/gs-maven/initial/src/main/java/hello/HelloWorld.java:[3,21] package org.joda.time does not exist
[ERROR] /H:/Projects/JAVA/web/unzipped/gs-maven/initial/src/main/java/hello/HelloWorld.java:[7,9] cannot find symbol
[ERROR] symbol: class LocalTime
[ERROR] location: class hello.HelloWorld
[ERROR] /H:/Projects/JAVA/web/unzipped/gs-maven/initial/src/main/java/hello/HelloWorld.java:[7,37] cannot find symbol
[ERROR] symbol: class LocalTime
[ERROR] location: class hello.HelloWorld
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
請讓我告知我在做什麼錯。
N.B:我只是跟着Building Java Projects with Maven教程作爲初學者。
檢查依賴項是否被下載到用戶文件夾下的本地m2存儲庫中。確保您已連接到互聯網 – virendrao
您是否使用m2eclipse作爲此 – mhasan
它在我的結尾沒有給出任何異常。我只是複製這些文件並嘗試'mvn compile' –