在 linux 上使用 ant 编译时出错：错误的版本 52.0，应该是 50.0

Question

在我使用 eclipse ant 和 Z93F725A07423FE1C889F448B33 在 Windows 上编译我的代码之前，它完全正常工作。

现在我在 Linux 上使用编译。 我确保下载 jdk 1.8 和 ant。

javac -version
javac 1.8.0_91

java -version
java version "1.8.0_91"
Java(TM) SE Runtime Environment (build 1.8.0_91-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)

ant -v
Apache Ant version 1.7.1 compiled on April 26 2010

但是，当我运行 ant 来启动我的 build.xml 时，它仍然因 javac 错误而失败。 还有什么我需要设置的吗？

 ant
Buildfile: build.xml

compileBuildDir:
    [javac] Compiling 12 source files to /build
    [javac] Model.java:19: cannot access DBObject
    [javac] bad class file: Utilities.jar(DBObject.class)]
    [javac] class file has wrong version 52.0, should be 50.0
    [javac] Please remove or make sure it appears in the correct subdirectory of the classpath.
    [javac] import DBObject;
    [javac]                     

BUILD FAILED
/build.xml:173: Compile failed; see the compiler error output for details.

当我做 ant -v

ant -v
Apache Ant version 1.7.1 compiled on April 26 2010
Buildfile: build.xml
Detected Java version: 1.6 in: /usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre
Detected OS: Linux
parsing buildfile /build.xml with URI = file:/test/build.xml
Project base dir set to: /myProject
[antlib:org.apache.tools.ant] Could not load definitions from resource org/apache/tools/ant/antlib.xml. It could not be found.
Build sequence for target(s) `packageApplication' is [compileBuildDir, packageApplication]
Complete build sequence is [compileBuildDir, packageApplication, reports, cleanTmpDir, copyToTmp, copyToTmpplot, ]

Answer 1

检测到 Java 版本：1.6 in：/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre

这是您的答案 - 您的路径设置不正确。

看看这里：

Class 文件有错误的版本 52.0，应该是 50.0