SpringBoot实战系列之多模块工程搭建
做服务时,比较考虑到工程的模块化和可扩展化,下面以一个完整的demo为例,来看一下如何进行模块化
一、首先看一下整个工程的重要的目录结构
1.1 工程结构概览图
image.png1.2 结构模式图
image.png1.3 工程结构详细图
.
├── course-demo //启动模块
│ ├── deploy
│ │ ├── start.sh //启动脚本
│ │ └── stop.sh //停止脚本
│ ├── src
│ │ └── main
│ │ ├── java
│ │ │ └── com
│ │ │ └── sun
│ │ │ └── course
│ │ │ └── coursedemo
│ │ │ └── CourseDemoApp.java //启动类
│ │ └── resources
│ │ └── application.properties //配置文件
│ ├── pom.xml //启动模块的pom
│ ├── course-demo.iml
│ └── target
│ ├── classes
│ │ ├── application.properties
│ │ └── com
│ │ └── sun
│ │ └── course
│ │ └── coursedemo
│ │ └── CourseDemoApp.class
│ ├── course-demo-version.jar //总jar包,包含依赖和主类
│ └── course-demo-version.jar.original //不包含依赖和主类
├── course-demo-controller //controller模块
│ ├── src
│ │ └── main
│ │ └── java
│ │ └── com
│ │ └── sun
│ │ └── course
│ │ └── coursedemo
│ │ ├── controller
│ │ │ └── StudentController.java
│ │ ├── model
│ │ │ └── Student.java
│ │ └── util
│ ├── course-demo-controller.iml
│ ├── pom.xml //controller模块的pom
│ └── target
│ └── course-demo-controller-version.jar //controller模块的jar包
├── course-demo-service
│ ├── src
│ │ ├── main
│ │ │ ├── java
│ │ │ │ └── com
│ │ │ │ └── sun
│ │ │ │ └── course
│ │ │ │ └── coursedemo
│ │ │ │ ├── mapper
│ │ │ │ │ ├── MapperConfiguration.java //配置扫描类,一种扫描的写法
│ │ │ │ │ └── StudentMapper.java
│ │ │ │ ├── model
│ │ │ │ │ └── Student.java
│ │ │ │ ├── service
│ │ │ │ │ ├── StudentSerivce.java
│ │ │ │ │ └── impl
│ │ │ │ │ └── StudentSerivceImpl.java
│ │ │ │ └── util
│ │ │ └── resources
│ │ │ └── application.properties //为了service层的单测的配置文件
│ │ └── test
│ │ └── java
│ │ └── com
│ │ └── sun
│ │ └── course
│ │ └── coursedemo
│ │ ├── CourseDemoApplicationTests.java
│ │ └── service
│ │ └── impl
│ │ └── StudentSerivceImplTest.java
│ ├── course-demo-service.iml
│ ├── pom.xml //service模块的pom
│ └── target
│ └── course-demo-service-version.jar //service模块的jar包
├── .gitignore
├── README.md
├── build.sh //编译脚本
├── course-demo-root.iml
└── pom.xml //总工程pom
1.4 工程结构说明
1)可以看到一共分为三个模块
启动模块:1,启动服务。2,停止服务。3,设置配置文件;
controller模块: 1,接收前端请求。2,调用service层服务
service模块:1,与数据库交互。2,mapper文件编写。3,service层编写单测
2)每一个模块都需要一个pom文件,每一个模块都是一个module(可以单独打包,作为一个服务,供其他模块调用)
3)模块间有依赖关系,通过pom文件来配置(注意:不要出现循环依赖)
4)配置文件,配置文件是application.properties,由于Springboot的思想是“习惯大于配置”,所以命名为application.properties和application.yml的文件都会自动加载,共有两处需要配置文件。(一处为启动模块,用于打包部署;一处为service模块,用于单测)
二、关键模块说明
image.png2.1 course-demo (启动类模块)
1)start.sh
#!/bin/sh
APPLICATION=course-demo.jar
SPRING_CONFIG_FILE=../conf/application.properties
MAX_MEMORY=2048M
MAX_PERM_MEMORY=512M
nohup java -Dspring.config.location=$SPRING_CONFIG_FILE -Dfile.encoding=UTF-8 \
-Xmx$MAX_MEMORY -XX:MaxPermSize=$MAX_PERM_MEMORY -XX:+UseConcMarkSweepGC -XX:+PrintGCDetails -XX:+PrintGCDateStamps \
-Xloggc:gc.log -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=20M -jar $APPLICATION > /dev/null 2>&1 &
2)stop.sh
#!/bin/sh
ps ux | grep "course-demo" | grep -v grep | grep -v stop.sh | cut -c 9-15 | xargs kill -s 9
echo "kill $@ done"
3)CourseDemoApp.java
@SpringBootApplication
public class CourseDemoApp {
public static void main(String[] args) {
SpringApplication.run(CourseDemoApp.class, args);
}
}
4)application.properties
server.port = 8088
#=================== logging config ===================#
logging.level.com.sun.course: debug
org.mybatis: trace
org.springframework.boot: debug
#=========================== database =========================#
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://XXX.XXX.XXX.XXX:3306/DBName?useUnicode=true&characterEncoding=UTF-8
spring.datasource.username=root
spring.datasource.password=123456
5)pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.sun.course</groupId>
<artifactId>course-demo-root</artifactId>
<version>${course-demo-root-version}</version>
</parent>
<groupId>com.sun.course</groupId>
<artifactId>course-demo</artifactId>
<dependencies>
<!--controller模块的依赖-->
<dependency>
<groupId>com.sun.course</groupId>
<artifactId>course-demo-controller</artifactId>
<version>${course-demo-root-version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<!--使用springboot的maven插件-->
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<!--设置主类-->
<mainClass>com.sun.course.coursedemo.CourseDemoApp</mainClass>
</configuration>
</plugin>
</plugins>
</build>
</project>
2.2 course-controller模块
image.pngpom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.sun.course</groupId>
<artifactId>course-demo-root</artifactId>
<version>${course-demo-root-version}</version>
</parent>
<groupId>com.sun.course</groupId>
<artifactId>course-demo-controller</artifactId>
<dependencies>
<!--service模块的依赖-->
<dependency>
<groupId>com.sun.course</groupId>
<artifactId>course-demo-service</artifactId>
<version>${course-demo-root-version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
</project>
2.3 course-service模块
image.png1)MapperConfiguration.java (可以扫描该目录下的mapper文件)
@Configuration
@MapperScan(basePackageClasses = MapperConfiguration.class)
public class MapperConfiguration {
}
2)application.properties
server.port = 0
#=================== logging config ===================#
logging.level.com.sun.course: debug
org.mybatis: trace
org.springframework.boot: debug
#=========================== database =========================#
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://XXX.XXX.XXX.XXX:3306/DBName?useUnicode=true&characterEncoding=UTF-8
spring.datasource.username=root
spring.datasource.password=123456
3)CourseDemoApplicationTests.java
package com.sun.course.coursedemo;
import com.sun.course.coursedemo.model.Student;
import com.sun.course.coursedemo.service.StudentSerivce;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest
public class CourseDemoApplicationTests {
@Autowired
private StudentSerivce studentSerivce;
@Test
public void getStudentByName(){
String name = "Tom";
Student student = studentSerivce.getStudentByName(name);
System.out.println(student);
}
}
4)pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.sun.course</groupId>
<artifactId>course-demo-root</artifactId>
<version>${course-demo-root-version}</version>
</parent>
<groupId>com.sun.course</groupId>
<artifactId>course-demo-service</artifactId>
<dependencies>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.3.1.tmp</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.10</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.44</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13</version>
<scope>test</scope>
</dependency>
<!--部署的时候注释,否则报循环引用; 单测的时候打开-->
<!--<dependency>
<groupId>com.sun.course</groupId>
<artifactId>course-demo</artifactId>
<version>version</version>
<scope>test</scope>
</dependency>-->
</dependencies>
</project>
2.4 父工程
1)pom.xml
<?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>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.6.RELEASE</version>
</parent>
<groupId>com.sun.course</groupId>
<artifactId>course-demo-root</artifactId>
<version>${course-demo-root-version}</version>
<packaging>pom</packaging>
<properties>
<java.version>1.8</java.version>
<course-demo-root-version>version</course-demo-root-version>
</properties>
<modules>
<module>course-demo</module>
<module>course-demo-controller</module>
<module>course-demo-service</module>
</modules>
</project>
2)build.sh
if [ $# -eq 0 ] ; then
mvn -Dspring.profiles.active=test -Dmaven.javadoc.skip=true clean package -U
else
if [ $1 = "-q" ] ; then
mvn -Dmaven.test.skip=true -Dmaven.javadoc.skip=true clean package -U
else
echo "build.sh [-q]"
exit 0
fi
fi
if [ $? -ne 0 ] ; then
echo "mvn package error"
exit -1
fi
rm -rf output
mkdir output
mkdir -p output/bin
mkdir -p output/conf
cp course-demo/target/course-demo-version.jar output/bin/course-demo.jar
cp course-demo/deploy/start.sh output/bin
cp course-demo/deploy/stop.sh output/bin
cp -rf course-demo/src/main/resources/* output/conf
三、编译执行
- 在根目录执行
sh build.sh -q
会生成一个output文件夹
image.png
2.cd output
,sh start.sh
执行
image.png - 在浏览器访问
http://localhost:8088/student/tom
四、github地址
五、参考
9、@SpringBootApplication用法
项目配置spring-boot-maven-plugin插件无法生效的问题
**之后又一个工程因为没有加repackge,spring-boot-maven-plugin不生效
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>2.2.6.RELEASE</version>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
坑
坑一:在idea中,子模块总是跳出父模块
示例:
父模块:course-manage-system,子模块:course-demo
发现curse-demo在course-manage-system内部有一个,在course-manage-system外部也有一个。
解决办法:如下图所示,将右侧红色部分删除即可。
image.png