Question

我已经构建了一个小应用程序。现在我想将我的依赖项从已下载的* .jar替换为Maven。

Maven显然试图用Java 5构建它。但它应该是Java 7。

如何告诉maven使用JDK 1.7？

$ mvn clean install
// ...
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /home/foo/bar.java:[17,37] diamond operator is not supported in -source 1.5
  (use -source 7 or higher to enable diamond operator)
[INFO] 2 errors 
[INFO] -----------------
// ...

这是我的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/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.foo.bar</groupId>
    <artifactId>bar</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>com.googlecode.htmlcompressor</groupId>
            <artifactId>htmlcompressor</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>com.yahoo.platform.yui</groupId>
            <artifactId>yuicompressor</artifactId>
            <version>2.4.6</version>
        </dependency>
        <dependency>
            <groupId>org.jodd</groupId>
            <artifactId>jodd-core</artifactId>
            <version>3.6.6</version>
        </dependency>
    </dependencies>


</project>

Answer 1

您需要将以下插件定义添加到project/build/plugins

下的pom.xml中

<project ... >
    ...
    <build>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
    ...
</project>

这将告诉maven编译器插件使用Java 1.7进行编译。

Maven尝试编译为1.5

1 个答案: