NLS开发日记1-初始化项目

创建项目

使用idea，文件-新建-项目，选择空项目，输入名称和位置

新增文件pom.xml，初始化什么都不加，但是java版本要选对，这里跟系统对应

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <packaging>pom</packaging>
    <groupId>com.wz</groupId>
    <artifactId>nls</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>nls</name>
    <description>nls</description>
    <properties>
        <java.version>17</java.version>
    </properties>
    <dependencyManagement>
        <dependencies>
        </dependencies>
    </dependencyManagement>
</project>

注意：父模块才有<dependencyManagement>标签，子模块没有。

项目上新建模块

创建后会发现项目下多了business文件夹

配置maven，与安装的版本一致

删掉部分无用文件夹static、template、test

运行java文件

若java文件为红色，将business/src/main/java标记为源码根目录

然后重新构建，如果报错，重启idea，

关联父子关系

1、将business中的pom中的parent块，剪切粘贴到nls的pom中

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <packaging>pom</packaging>
    <groupId>com.wz</groupId>
    <artifactId>nls</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>nls</name>
    <description>nls</description>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.1.7</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <properties>
        <java.version>17</java.version>
    </properties>
    <dependencyManagement>
        <dependencies>
        </dependencies>
    </dependencyManagement>
</project>

将nls下pom的三个标签，复制覆盖到business的pom里，然后去掉relativePath标签和冗余的

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>com.wz</groupId>
        <artifactId>nls</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <groupId>com.wz.nls</groupId>
    <artifactId>business</artifactId>
    <name>business</name>
    <description>business</description>
    <properties>
        <java.version>17</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <annotationProcessorPaths>
                        <path>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </path>
                    </annotationProcessorPaths>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

然后再在nls下的pom注册module

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <packaging>pom</packaging>
    <groupId>com.wz</groupId>
    <artifactId>nls</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>nls</name>
    <description>nls</description>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.1.7</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <modules>
        <module>business</module>
    </modules>
    <properties>
        <java.version>17</java.version>
    </properties>
    <dependencyManagement>
        <dependencies>
        </dependencies>
    </dependencyManagement>
</project>

以上操作其实是重新建立父子关系，原本的business的父是org.springframework.boot，在上面第1步给了nls；第2步将business的父改为了com.wz；第3步在nls下注册了module，使得business成为其组件。最后刷新一下mvn.