如何在pom.xml文件中指定Java编译器版本？ [英] How do you specify the Java compiler version in a pom.xml file?

问题描述

我在netbeans上写了一个大约超过2000行的maven代码。当我在netbeans上编译它时，一切都很好，但如果我想在命令行上运行它，我将得到这些错误：

I wrote a maven code on netbeans that has approximately more than 2000 lines. When I compile it on netbeans, everything is fine, but if I want to run it on command line, I will get these errors:

generics are not supported in -source 1.3
(use -source 5 or higher to enable generics)
        ArrayList<ArrayList<Integer>> list = new ArrayList<ArrayList<Integer>>();

generics are not supported in -source 1.3
(use -source 5 or higher to enable generics)
        HashSet<Double> resid_List = new HashSet<Double>(Arrays.asList(resid_val));

generics are not supported in -source 1.3
(use -source 5 or higher to enable generics)
        List<Integer> ind_ovlpList = new ArrayList<Integer>(Arrays.asList(ind_ovlp));

generics are not supported in -source 1.3
(use -source 5 or higher to enable generics)
public class ColumnComparator implements Comparator<double[]> {

annotations are not supported in -source 1.3
(use -source 5 or higher to enable annotations)
@Override

我试图使用 Java 1.3.1，编译器错误，但我得到了更多错误。我从其他帖子中发现我应该修改pom.xml，但我不知道怎么做。这是我的pom.xml

I tried to use Java 1.3.1, compiler errors ,but I got more errors. I found from other posts that I should modify pom.xml, but I do not know how. Here is my pom.xml

<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.mycompany</groupId>
  <artifactId>mavenmain</artifactId>
   <version>1.0-SNAPSHOT</version>
   <packaging>jar</packaging>

   <name>mavenmain</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>gov.nist.math</groupId>
        <artifactId>jama</artifactId>
        <version>1.0.2</version>
     </dependency>
   </dependencies>
 </project>

如果你可以帮助我会很棒。

It would be great if you can help me.

推荐答案

<project>
  [...]
  <build>
    [...]
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>(whatever version is current)</version>
        <configuration>
          <!-- or whatever version you use -->
          <source>1.7</source>
          <target>1.7</target>
        </configuration>
      </plugin>
    </plugins>
    [...]
  </build>
  [...]
</project>

请参阅maven编译器插件的配置页面：

See the config page for the maven compiler plugin:

http：/ /maven.apache.org/plugins/maven-compiler-plugin/examples/set-compiler-source-and-target.html

哦，和：不要使用Java 1.3.x，当前版本是Java 1.7.x或1.8.x

Oh, and: don't use Java 1.3.x, current versions are Java 1.7.x or 1.8.x

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