xmlbeans-maven-plugin 没有找到 javac [英] xmlbeans-maven-plugin not finding javac

问题描述

我正在尝试设置 xmlbeans-maven-plugin 2.3.3 在我的 Eclipse 中，虽然一切似乎都正常，但由于无法找到文件 C:UsersDanielWorkspaceMyProjectjavac，它失败并出现 java.io.IOException.>

这很奇怪，因为 javac 是在系统的%PATH% 那么它为什么要尝试在 %PROJECT_LOC% 中找到它?

我发现这个问题描述，这听起来与我的非常相似，但我把JDK 路径在所有其他路径之前，但没有帮助.

知道如何告诉xmlbeans-maven-plugin 在哪里寻找javac?

更新 1: 我尝试通过简单地将 javac.exe 复制到项目目录来解决这个问题，至少它现在找到了，但问题转移到了:

java.lang.NoClassDefFoundError: com/sun/tools/javac/Main引起:java.lang.ClassNotFoundException:com.sun.tools.javac.Main在 java.net.URLClassLoader$1.run(Unknown Source)在 java.security.AccessController.doPrivileged(Native Method)在 java.net.URLClassLoader.findClass(Unknown Source)在 java.lang.ClassLoader.loadClass(来源不明)在 sun.misc.Launcher$AppClassLoader.loadClass(来源不明)在 java.lang.ClassLoader.loadClass(来源不明)线程main"中的异常找不到主类:com.sun.tools.javac.Main.程序将会退出.

任何有助于提出正确解决方案的见解(例如.m2/settings.xml?) 将不胜感激.

更新 2: 我也试过 这个小解决方案 我在搜索中发现:

<localRepository>c:maven
epository</localRepository><配置><编译器>C:Program Files (x86)Javajdk1.6.0_37injavac.exe</compiler></配置></设置>

但这并没有帮助插件找到javac.它仍然抱怨 javac.exe 的系统找不到指定的文件".

解决方案

找到解决方案！在项目的 pom.xml中，只需在中添加以下内容:

C:Program Files (x86)Javajdk1.6.0_37injavac.exe</compiler>

即

 <插件><groupId>org.codehaus.mojo</groupId><artifactId>xmlbeans-maven-plugin</artifactId><version>2.3.3</version><执行><执行><目标><goal>xmlbeans</goal></目标></执行></执行><继承的>真</继承的><配置><schemaDirectory>${basedir}/src/main/xsd</schemaDirectory><编译器>C:Program Files (x86)Javajdk1.6.0_37injavac.exe</compiler></配置></插件>

另外，一定要指向Window ->首选项 ->Java ->将 JRE 安装到 JDK，而不是 JRE:C:Program Files (x86)Javajdk1.6.0_37.如本主题中所述.

I am trying to setup xmlbeans-maven-plugin 2.3.3 in my Eclipse and while everything seems to go OK, It fails with an java.io.IOException due to inability to find the file C:UsersDanielWorkspaceMyProjectjavac.

This is strange because javac is on the system's %PATH% so why would it try to find it in %PROJECT_LOC%?

I found this problem description which sounds very similar to mine, but I placed the JDK path in front of all other paths and that didn't help.

Any idea how to tell the xmlbeans-maven-plugin where to look for javac?

UPDATE 1: I tried working around this problem by simply copying javac.exe to the project's directory and at least it now finds it but the problem moved forward to:

java.lang.NoClassDefFoundError: com/sun/tools/javac/Main
Caused by: java.lang.ClassNotFoundException: com.sun.tools.javac.Main
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
Exception in thread "main" Could not find the main class: com.sun.tools.javac.Main.  Program will exit.

Any insight that could help come up with the correct solution to this (e.g. something in .m2/settings.xml?) would be appreciated.

UPDATE 2: I also tried this little solution I found in my searches:

<settings 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/settings-1.0.0.xsd">
  <localRepository>c:maven
epository</localRepository>
   <configuration>
    <compiler>C:Program Files (x86)Javajdk1.6.0_37injavac.exe</compiler>
   </configuration>
</settings>

But that didn't help the plugin find javac. It still complains about "The system cannot find the file specified" for javac.exe.

解决方案

Found the solution! In the project's pom.xml, simply add the following inside <configuration>:

<compiler>C:Program Files (x86)Javajdk1.6.0_37injavac.exe</compiler>

i.e.

        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>xmlbeans-maven-plugin</artifactId>
            <version>2.3.3</version>
            <executions>
                <execution>
                    <goals>
                        <goal>xmlbeans</goal>
                    </goals>
                </execution>
            </executions>
            <inherited>true</inherited>
            <configuration>
                <schemaDirectory>${basedir}/src/main/xsd</schemaDirectory>
                <compiler>C:Program Files (x86)Javajdk1.6.0_37injavac.exe</compiler>
            </configuration>
        </plugin>

Also, be sure to point the Window -> Preferences -> Java -> installed JREs to the JDK's, not JRE's: C:Program Files (x86)Javajdk1.6.0_37. As described in this thread.

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