Java Maven：没有可编译的源代码
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Maven: No sources to compile
提问by Mikhail Vega
I am following the 'Build Java Projects with Maven' (https://spring.io/guides/gs/maven/#scratch) and when I run 'mvn compile' from /Users/Misha/Desktop/src/main/java/hello, I get this prompt:
我正在关注“使用 Maven 构建 Java 项目”（https://spring.io/guides/gs/maven/#scratch），当我从 /Users/Misha/Desktop/src/main/java 运行“mvn compile”时/你好，我收到这个提示：
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building gs-maven 0.1.0
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ gs-maven ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 3 resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ gs-maven ---
[INFO] No sources to compile
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.942 s
[INFO] Finished at: 2015-01-11T23:10:28-08:00
[INFO] Final Memory: 7M/155M
[INFO] ------------------------------------------------------------------------
I have the two java files and the xml file in the hello directory, and I am assuming that I should see "Hello World!" instead of No sources to compile. Why is my java code not compiling? Thanks!
我在 hello 目录中有两个 java 文件和 xml 文件，我假设我应该看到“Hello World！” 而不是没有要编译的来源。为什么我的java代码不能编译？谢谢！
采纳答案by piet.t
To create a maven-project you need
要创建您需要的 Maven 项目
- A project-directory containing the
pom.xml-file - Within this project-directory a subdirectory
src/main/javacontaining your java-code (packages go to subdirectories ofsrc/main/java)
- 包含
pom.xml-file 的项目目录 - 在此项目目录中，
src/main/java包含您的 java 代码的子目录（包转到 的子目录src/main/java）
To invoke maven run mvn compileor something similar from the project-directory.
mvn compile从项目目录中调用 maven run或类似的东西。
回答by piet.t
because there are no java files in $PROJECT_DIR/src/main/java
因为里面没有java文件 $PROJECT_DIR/src/main/java
回答by P.Brian
Are you try to compile project or class ? As the guideline in https://spring.io/guides/gs/maven/#scratchyou need to compile for project.
Try to run mvn compilefrom project direction.
您是否尝试编译项目或类？作为https://spring.io/guides/gs/maven/#scratch 中的指南，您需要为项目编译。尝试mvn compile从项目方向运行。
回答by Cameron Hudson
In my case, I was missing this:
就我而言，我错过了这个：
<project>
<build>
<sourceDirectory>src</sourceDirectory>
<testSourceDirectory>test</testSourceDirectory>
</build>
</project>
Normally, I'd just use the default directory structure of src/main/javafor my source root and src/test/javafor my test root, but I'm working on a class project with existing code, and can't rearrange the file structure.
通常，我只会src/main/java为我的源根和src/test/java测试根使用默认目录结构，但我正在使用现有代码处理一个类项目，并且无法重新排列文件结构。
