具有 J 装饰器的项目称为Java项目和项目 M decorator被称为Maven项目。 eclipse项目可以有多种类型。

The project having J decorator are called Java projects and projects having M decorator are called Maven projects. An eclipse project can be of more than one type.

项目类型可以在任何给定项目中的 .project 文件中看到。

Project type can be seen in the .project file present inside any given project.

.project 文件的典型内容如下所示

Typical content of .project file look like as shown below

<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
    <name>Test</name>
    <comment></comment>
    <projects>
    </projects>
    <buildSpec>
        <buildCommand>
            <name>org.eclipse.jdt.core.javabuilder</name>
            <arguments>
            </arguments>
        </buildCommand>
        <buildCommand>
            <name>org.eclipse.pde.ManifestBuilder</name>
            <arguments>
            </arguments>
        </buildCommand>
        <buildCommand>
            <name>org.eclipse.pde.SchemaBuilder</name>
            <arguments>
            </arguments>
        </buildCommand>
    </buildSpec>
    <natures>
        <nature>org.eclipse.pde.PluginNature</nature>
        <nature>org.eclipse.jdt.core.javanature</nature>
    </natures>
</projectDescription>

查看性质标记。所有Java项目都具有 org.eclipse.jdt.core.javanature 特性，并且单个项目可以具有多种性质。

Look at natures tag. All Java projects will have org.eclipse.jdt.core.javanature nature and a single project can have multiple nature.

您可以通过右键单击任何Java项目并选择配置>将Java项目转换为Maven项目。隐藏到Maven项目

You can convert Java projects to Maven projects by right clicking on any Java project and selecting Configure > Covert to Maven project

转换后检查 .project 文件中的更改。

Check the changes in .project file after converting.