使用maven构建时无效的目标版本

Question

我最近将我的机器升级到最新版本的java 6,并在构建项目时不断收到此错误.这有什么意义吗？

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.5.1:compile (default-compile) on project
 biz.minaret: Compilation failure
[ERROR] Failure executing javac, but could not parse the error:
[ERROR] javac: invalid target release: 1.6.0_45
[ERROR] Usage: javac <options> <source files>
[ERROR] use -help for a list of possible options

我的pom的一部分看起来像这样

  <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>${maven.compiler.plugin.version}</version>
            <configuration>
                <source>1.6.0_45</source>
                <target>1.6.0_45</target>
                <encoding>UTF-8</encoding>
            </configuration>
  </plugin>

我的JAVA_HOME设置正确:

PS C:\ Users\me\Documents\m

Documents\myproject> java -version
java version "1.6.0_45"
Java(TM) SE Runtime Environment (build 1.6.0_45-b06)
Java HotSpot(TM) 64-Bit Server VM (build 20.45-b01, mixed mode)>

和:

Documents\myproject> javac -version
javac 1.6.0_45

Answer 1

你应该使用像1.6或1.7不使用内部版本号的东西.

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-compiler-plugin</artifactId>
  <version>${maven.compiler.plugin.version}</version>
  <configuration>
    <source>1.6</source>
    <target>1.6</target>
    <encoding>UTF-8</encoding>
  </configuration>
</plugin>

应使用以下属性解决编码部分:

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

定义完之后,您可以将上述配置简化为以下内容

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-compiler-plugin</artifactId>
  <version>${maven.compiler.plugin.version}</version>
  <configuration>
    <source>1.6</source>
    <target>1.6</target>
  </configuration>
</plugin>