spring boot:多模块项目生成jar包（spring boot 2.3.3）
一，多模块项目的优点：
1，为什么要使用多模块项目?
相比传统的单体工程，使用Maven的多模块配置，
有如下优点:
帮助项目划分模块，鼓励重用，
防止POM变得过于庞大，
方便某个模块的构建，而不用每次都构建整个项目，
对某个模块的特殊控制更为方便
2，创建项目的流程：
先创建一个空项目multimodjar，删除无关文件，只留一个pom.xml和一个multimodjar.iml
然后在这个项目下创建module
3，pom.xml/multimodjar.iml 两个文件的用途说明：
pom.xml: 项目对象模型(Project Object Model)的简称,它是Maven项目中的文件。
作用：管理源代码/配置文件/开发者的信息和角色/问题追踪系统/组织信息/项目授权/项目的url/项目的依赖关系等
multimodjar.iml，iml文件，infomation of module,
作用：保存了项目的配置信息,intellij idea需要从它获取项目信息
说明：刘宏缔的架构森林是一个专注架构的博客，地址：https://www.cnblogs.com/architectforest
对应的源码可以访问这里获取： https://github.com/liuhongdi/
说明：作者:刘宏缔 邮箱: 371125307@qq.com
二, 演示项目的相关信息
1,项目地址:
https://github.com/liuhongdi/multimodjar
2,项目功能说明：
演示了多模块项目如何配置pom.xml打包
项目包含了4个模块：mmweb(可执行的入口)
mmservice
mmpojo
mmrepo(数据库)
3，项目结构：如图:
三，配置文件说明
1,根项目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>2.3.3.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.multimodjar</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <name>demo</name> <description>Demo project for Spring Boot</description> <properties> <java.version>11</java.version> </properties> <packaging>pom</packaging> <modules> <module>mmweb</module> <module>mmpojo</module> <module>mmrepo</module> <module>mmservice</module> </modules> </project>
可以看到，在根项目中，只需要添加对各个模块的依赖
2,mmweb模块的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>2.3.3.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.mmweb</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <name>demo</name> <description>Demo project for Spring Boot</description> <properties> <java.version>11</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!--mmservice begin--> <dependency> <groupId>com.mmservice</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <scope>compile</scope> </dependency> <!--mmpojo begin--> <dependency> <groupId>com.mmpojo</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <scope>compile</scope> </dependency> <!--thymeleaf begin--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </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> </dependencies> <!--spring boot打包的话需要指定一个唯一的入口类--> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <mainClass>com.mmweb.demo.DemoApplication</mainClass> <layout>ZIP</layout> </configuration> <executions> <execution> <goals> <goal>repackage</goal> </goals> </execution> </executions> </plugin> </plugins> </build> </project>
因为mmweb是可执行的类所在模块，所以需要专门指定执行mainClass入口类
3,mmweb的application.properties
#error server.error.include-stacktrace=always #errorlog logging.level.org.springframework.web=trace #mysql spring.datasource.url=jdbc:mysql://localhost:3306/store?characterEncoding=utf8&useSSL=false spring.datasource.username=root spring.datasource.password=lhddemo spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver #mybatis mybatis.mapper-locations=classpath:/mapper/*Mapper.xml mybatis.type-aliases-package=com.example.demo.mapper mybatis.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl #thymeleaf spring.thymeleaf.cache=false spring.thymeleaf.encoding=UTF-8 spring.thymeleaf.mode=HTML spring.thymeleaf.prefix=classpath:/templates/ spring.thymeleaf.suffix=.html
4,mmservice的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>2.3.3.RELEASE</version> <relativePath/> </parent> <groupId>com.mmservice</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <name>demo</name> <description>Demo project for Spring Boot</description> <properties> <java.version>11</java.version> </properties> <dependencies> <!--mmpojo begin--> <dependency> <groupId>com.mmpojo</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <scope>compile</scope> </dependency> <!--mmrepo begin--> <dependency> <groupId>com.mmrepo</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <scope>compile</scope> </dependency> <!--pagehelper begin--> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper-spring-boot-starter</artifactId> <version>1.2.12</version> </dependency> </dependencies> </project>
5,mmrepo的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>2.3.3.RELEASE</version> <relativePath/> </parent> <groupId>com.mmrepo</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <name>demo</name> <description>Demo project for Spring Boot</description> <properties> <java.version>11</java.version> </properties> <dependencies> <dependency> <groupId>com.mmpojo</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency> <!--mybatis begin--> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.1.3</version> </dependency> <!--mysql begin--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> </dependencies> </project>
6，mmpojo的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>2.3.3.RELEASE</version> <relativePath/> </parent> <groupId>com.mmpojo</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <name>demo</name> <description>Demo project for Spring Boot</description> <properties> <java.version>11</java.version> </properties> </project>
7,用到的数据表的结构：
CREATE TABLE `goods` ( `goodsId` int(11) NOT NULL AUTO_INCREMENT COMMENT 'id', `goodsName` varchar(500) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL DEFAULT '' COMMENT 'name', `subject` varchar(200) NOT NULL DEFAULT '' COMMENT '标题', `price` decimal(15,2) NOT NULL DEFAULT '0.00' COMMENT '价格', `stock` int(11) NOT NULL DEFAULT '0' COMMENT 'stock', PRIMARY KEY (`goodsId`) ) ENGINE=InnoDB AUTO_INCREMENT=0 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='商品表'
四，java代码说明
1,DemoApplication.java
@SpringBootApplication(scanBasePackages = {"com.mmservice.demo","com.mmpojo.demo","com.mmweb.demo"})
@MapperScan("com.mmrepo.demo")
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
说明：因为引入了多模块，需要添加上扫描包的路径
2,HomeController.java
import com.mmpojo.demo.pojo.Goods; import com.mmservice.demo.service.GoodsService; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.*; import javax.annotation.Resource; import java.util.List; import java.util.Map; @Controller @RequestMapping("/home") public class HomeController { @Resource private GoodsService goodsService; // list all goods @GetMapping("/list") @ResponseBody public List<Goods> all() { System.out.println("-------------------------list"); List<Goods> list = goodsService.getAllGoods(); return list; } //带模板显示商品列表 参数:第几页 @GetMapping("/goodslist") public String goodsList(Model model, @RequestParam(value="p",required = false,defaultValue = "1") int currentPage) { Map<String,Object> res = goodsService.getAllGoodsByPage(currentPage); model.addAttribute("pageInfo", res.get("pageInfo")); model.addAttribute("goodslist", res.get("goodslist")); return "goods/goodslist"; } }
注意import的goods/GoodsService类的路径
3,GoodsServiceImpl.java
@Service public class GoodsServiceImpl implements GoodsService { @Resource private GoodsMapper goodsMapper; //返回全部商品 @Override public List<Goods> getAllGoods() { List<Goods> goodsList = goodsMapper.selectAllGoods(); return goodsList; } //带分页返回商品 @Override public Map<String,Object> getAllGoodsByPage(int currentPage) { Map<String,Object> res = new HashMap<String,Object>(); PageHelper.startPage(currentPage, 5); List<Goods> goodsList = goodsMapper.selectAllGoods(); res.put("goodslist",goodsList); PageInfo<Goods> pageInfo = new PageInfo<>(goodsList); res.put("pageInfo",pageInfo); return res; } }
4,GoodsMapper.java
@Repository @Mapper public interface GoodsMapper { List<Goods> selectAllGoods(); }
5,GoodsMapper.xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.mmrepo.demo.mapper.GoodsMapper"> <select id="selectAllGoods" resultType="com.mmpojo.demo.pojo.Goods"> select * from goods order by goodsId desc </select> </mapper>
6,Goods.java
public class Goods { //商品id Long goodsId; public Long getGoodsId() { return this.goodsId; } public void setGoodsId(Long goodsId) { this.goodsId = goodsId; } //商品名称 private String goodsName; public String getGoodsName() { return this.goodsName; } public void setGoodsName(String goodsName) { this.goodsName = goodsName; } //商品标题 private String subject; public String getSubject() { return this.subject; } public void setSubject(String subject) { this.subject = subject; } //商品价格 private BigDecimal price; public BigDecimal getPrice() { return this.price; } public void setPrice(BigDecimal price) { this.price = price; } //库存 int stock; public int getStock() { return this.stock; } public void setStock(int stock) { this.stock = stock; } public String toString(){ return " Goods:goodsId=" + goodsId +" goodsName=" + goodsName+" subject=" + subject+" price=" + price+" stock=" + stock; } }
7,goodslist.html
<!DOCTYPE html> <html lang="en"> <head > <title >商品列表</title> <!--全局通用框架样式 begin--> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" /> <meta charset="utf-8" /> <meta name="description" content="" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" /> </head> <body style="font-size: 12px;"> <div style="width:100%;height:10px;background:#eeeeee;font-size: 16px;" ></div> <div id="content" style="width:1040px;"> <div style="width:150px;float:left;font-size: 12px;background:#eeeeee;" ></div> <div style="width:790px;float:left;"> <!--main begin--> <div th:each="goodsone:${goodslist}"
style="border-bottom-style:solid; border-bottom-width: 1px; width:990px;height:60px;font-size:12px;overflow: hidden;border-bottom-color: #eeeeee;"> <div style="float:left;width:20px;overflow: hidden;" th:text="${goodsone.goodsId}"></div> <div style="float:left;width:200px;height:60px;overflow: hidden;" th:text="${goodsone.goodsName}"></div> <!--<div style="float:left;width:300px;overflow: hidden;" th:text="${image_one.image_sn}"></div>--> <div style="float:left;width:200px;overflow: hidden;" th:text="${goodsone.subject}"></div> <div style="float:left;width:80px;overflow: hidden;" th:text="${goodsone.price}"></div> <div style="float:left;width:100px;overflow: hidden;" th:text="${goodsone.stock}"></div> <div style="float:left;width:160px;overflow: hidden;" ></div> </div> <!--page info begin--> <div align="center"> <a class="allpage"><b th:text="'共 '+ ${pageInfo.getPages()}+ ' 页'"></b></a> <a th:href="@{/home/goodslist/(p=${pageInfo.getNavigateFirstPage()})}" >首页</a> <a th:if="${pageInfo.isHasPreviousPage()} == true" th:href="@{/home/goodslist/(p=${pageInfo.getPrePage()})}" >上一页</a> | <span th:each="i,iterStat :${#numbers.sequence(pageInfo.getNavigateFirstPage(), pageInfo.getNavigateLastPage())}" > <a th:href="@{/home/goodslist/(p=${i})}" th:text=" ${i} "> </a> <span th:text=" ${iterStat.last}? '':'|' ">|</span> </span> | <a th:if="${pageInfo.isHasNextPage()} == true" th:href="@{/home/goodslist/(p=${pageInfo.getNextPage()})}" >下一页</a> <a th:href="@{/home/goodslist/(p=${pageInfo.getNavigateLastPage()})}" >尾页</a> </div> <!--page info end--> <!--main end--> </div> </div> </body> </html>
五，测试效果
1, 打包:
maven界面，root项目下，先执行clean
然后再执行package
即可以在mmweb项目的target目录下看到jar包
demo-0.01-SNAPSHOT.jar，就是生成的jar包
2，运行jar包
#nohup: 让命令在后台执行，即使终端关闭也不会退出
[root@localhost target]# nohup /usr/local/soft/jdk-12.0.2/bin/java -Xms256m -Xmx256m -jar /data/springboot2f/multimodjar/mmweb/target/demo-0.0.1-SNAPSHOT.jar >/dev/null 2>&1 & [1] 30103
如使用此命令，注意把路径替换成自己java命令和jar包的所在路径
3,从浏览器访问:
http://127.0.0.1:8080/home/goodslist/?p=1
返回:
六，查看spring boot的版本:
. ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.3.3.RELEASE)
