Intellij Idea Project builds multiple modules under SpringBoot

Intellij Idea project is an example of how to create multiple modules in intellij Idea. Today I will briefly introduce the breakdown of the detailed work between modules. If you do not consider subdividing multiple modules, you can take a look at this article “SpringBoot introduction tutorial (a) detailed explanation of Intellij IDEA build SpringBoot”.

V Design database

CREATE TABLE `useraccount` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, `username` varchar(255) NOT NULL, `age` int(10) NOT NULL, `phone` bigint NOT NULL, `email` varchar(255) NOT NULL, `account` varchar(100) NOT NULL UNIQUE, `pwd` varchar(255) NOT NULL, PRIMARY KEY (`id`) )ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8; Insert into 'useraccount' values(1,' dev ',23,158,'[email protected]','test001','test001'); insert into 'useraccount' values(1,' dev ',23,158,'[email protected]','test001','test001'); Insert into 'useraccount' values(2,' dev ',27,136,'[email protected]','test002','test002'); insert into 'useraccount' values(2,' dev ',27,136,'[email protected]','test002','test002'); Insert into 'useraccount' VALUES (3,' dev ',31,159,'[email protected]','test003','test003'); Insert into 'useraccount' values(4,' dev ',35,130,'[email protected]','test004','test004'); insert into 'userAccount' values(4,' dev ',35,130,'[email protected]','test004','test004'); select * from `useraccount`;Copy the code

V is the introduction of mybatis

1.0 Add myBatis plug-in

Add the mybatis plug-in to pom.xml in the learn-Persist file.

<build> <plugins> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>${mybatis-generator.version}</version> <dependencies> <dependency> <groupId> mysql</groupId> <artifactId> mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>${mybatis-generator.version}</version> </dependency> </dependencies> <configuration> <! - automatically generate configuration - > < configurationFile > SRC/main/resources/mybatis config/mybatis - generator. XML < / configurationFile > <! -- Allow moving generated files --> <verbose>true</verbose> <! False </overwrite> </configuration> </plugins> </build>Copy the code

As shown above, create mapper and mybatis-config file directories under the Resources of learn-persist, and add jdbc.properties and mybatis-generator.xml files, respectively.

JDBC 1.1. The properties

jdbc.driverClassName=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/mytest? useSSL=false jdbc.username=toutou jdbc.password=demo123456Copy the code

1.2 mybatis generator. XML

<? The XML version = "1.0" encoding = "utf-8"? > <! DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"> <generatorConfiguration> <properties resource="mybatis-config/jdbc.properties"/> <context id="DB2Tables" targetRuntime="MyBatis3"> <commentGenerator> <property name="suppressDate" value="true"/> <property name="suppressAllComments" value="true"/> </commentGenerator> <! <jdbcConnection driverClass=" com.mysql.jdbc.driver "connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"> </jdbcConnection> <javaTypeResolver> <property name="forceBigDecimals" value="false"/> </javaTypeResolver> <javaModelGenerator targetPackage="learn.model.po" targetProject=".. /learn-model/src/main/java/"> <property name="enableSubPackages" value="false" /> <property name="trimStrings" value="true" /> </javaModelGenerator> <sqlMapGenerator targetPackage="mapper" targetProject=".. /learn-persist/src/main/resources"> <property name="enableSubPackages" value="false" /> </sqlMapGenerator> <javaClientGenerator targetPackage="learn.persist" targetProject=".. /learn-persist/src/main/java/" type="XMLMAPPER"> <property name="enableSubPackages" value="false" /> </javaClientGenerator> <! --> <table tableName=" userAccount "domainObjectName=" userAccount" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table> </context> </generatorConfiguration>Copy the code

More information about mybatis-generator.xml can be found here.

1.3 Unified version Configuration

For the convenience of subsequent management, the version numbers of all introduced plug-ins are unified in pom.xml of project(Hellolearn), and directly used in pom.xml of each sub-module (such as learn-persist) by ${} method.

Such as: Add < mybatis-generator. Version >1.3.6< /mybatis-generator. Version > to the pom.xml attribute of Hellolearn, Use < version>${mybatis-generator.version}< /version> in the learn-persist pop.xml file.

Note that the “for example” section of the code tag has Spaces to escape, preventing the browser from recognizing “mybatis-generator.version” and “version” as HTML tags.

1.4 Maven Project plug-in

Find the plugin for Mybatis -Generator in maven Project. If you can’t find it, right-click the Learn-persist plugin in Maven Project and click Generate Sources… .

1.5 Run the Mybatis Generator plug-in

As shown above, click to run mybatis Generator: Generator plug-in, which will generate three files marked red on the left.

V write controller

2.0 Add result to return the entity class

package learn.model.vo; import java.io.Serializable; /** * @author toutou * @date by 2019/07 */ public class Result<T> implements Serializable { public int code; public String message; public T data; public int getCode() { return code; } public void setCode(int code) { this.code = code; } public String getMessage() { return message; } public void setMessage(String message) { this.message = message; } public T getData() { return data; } public void setData(T data) { this.data = data; } public static <T> Result<T> setSuccessResult(T t){ Result<T> r = new Result<T>(); r.setCode(200); r.setData(t); r.setMessage("success"); return r; } public static <T> Result<T> setErrorResult(int tempCode, String messageTemp){ Result<T> r = new Result<T>(); r.setCode(tempCode); r.setMessage(messageTemp); return r; }}Copy the code

2.1 add the controller

package learn.web.controller; import learn.model.vo.Result; import learn.model.vo.UserAccountVO; import learn.service.*; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; /** * @author toutou * @date by 2019/07 */ @RestController public class UserController { @Autowired UserAccountService userAccountService; @GetMapping("/user/hello") public String helloWorld() { return "hello world."; } @GetMapping("/user/getuser") public Result getUserAccountById(@RequestParam("uid") int id){ UserAccountVO user = userAccountService.getUserAccountById(id); if(user ! = null){ return Result.setSuccessResult(user); }else{return result.seterrorResult (404, "user does not exist "); }}}Copy the code

Note: getUserAccountById is not needed at this time.Copy the code

2.2 Adding aplication startup

package learn.web; import org.mybatis.spring.annotation.MapperScan; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.annotation.ComponentScan; /** * Created by toutou on 2019/7 */ @SpringBootApplication @ComponentScan(basePackages = {"learn.*" }) @MapperScan(basePackages = {"learn.persist"}) public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); }}Copy the code

2.3 add the aplication. The properties

server.port=8300
spring.profiles.active=@env@

#mybatis
mybatis.mapper-locations = classpath:mapper/*Mapper.xml
Copy the code

2.4 Configuring the startup class

2.5 Test Effect

V writing service

3.1 add the Service

package learn.service;

import learn.model.vo.UserAccountVO;

/**
 * @author toutou
 * @date by 2019/07
 */
public interface UserAccountService {
    UserAccountVO getUserAccountById(Integer id);
}
Copy the code

3.2 implementation Service

package learn.service.impl;

import learn.model.po.UserAccount;
import learn.model.vo.UserAccountVO;
import learn.persist.UserAccountMapper;
import learn.service.UserAccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @author toutou
 * @date by 2019/07
 */
@Service
public class UserAccountServiceImpl implements UserAccountService{
    @Autowired
    UserAccountMapper userMapper;

    public UserAccountVO getUserAccountById(Integer id){
        UserAccountVO accountVO = null;
        UserAccount account = userMapper.selectByPrimaryKey(id);
        if (account != null) {
            accountVO = new UserAccountVO();
            accountVO.setId(account.getId());
            accountVO.setAccount(account.getAccount());
            accountVO.setAge(account.getAge());
            accountVO.setEmail(account.getEmail());
            accountVO.setUsername(account.getUsername());
            accountVO.setPhone(account.getPhone());
        }

        return accountVO;
    }
}
Copy the code

V Configuration Settings

4.1 add application. The properties

4.2 add application. Dev. Properties

spring.datasource.url=jdbc:mysql://localhost:3306/mytest? useSSL=false&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&serverTimezone=GMT%2b8 spring.datasource.username=toutou spring.datasource.password=demo123456 spring.datasource.driver-class-name=com.mysql.jdbc.DriverCopy the code

4.3 Adding the POM.xml configuration

4.3.1 hellolearn pom. XML

4.3.2 learn – web pom. XML

    <build>
        <filters>
            <filter>src/main/resources/config/application-${env}.properties</filter>
        </filters>
    </build>
Copy the code

4.4 Updating the Application startup class

4.5 Test Effect

Vlinux deployment springboot

Add a plug-in to 5.1 Learning-web pom.xml

<build> <filters> <filter>src/main/resources/config/application-${env}.properties</filter> </filters> <plugins> <plugin>  <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <mainClass>learn.web.Application</mainClass> <classifier>exec</classifier> </configuration> <executions> <execution> <goals> <goal>repackage</goal> </goals> </execution> </executions> </plugin> </plugins> </build>Copy the code

5.2 Hellolearn Pom.xml plug-in added

<build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-jar-plugin</artifactId> < version > 3.0.2 < / version > < configuration > < excludes > < exclude > * * / profiles / < / exclude > <exclude>**/mybatis-generator/</exclude> </excludes> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugins> </build>Copy the code

Note: Exclude if useful to the Profiles file directory.

5.3 Packaged Deployment

Java - jar learn - web - 0.0.1 - the SNAPSHOT - exec. Jar - server port = 95

Questions you may encounter:

Spring boot Field required a bean of type that could not be found
Caused by: java.lang.IllegalStateException: Ambiguous mapping found. Cannot map ‘xxxController’ bean method
Mybatis -generator-maven-plugin: Generate failed: Exception getting JDBC Driver
Maven Failed to execute goal on project… : Could not resolve dependencies for project …
Spring boot package Execution times wrong default of goal org. Springframework. The boot: spring – the boot – maven – plugin: 1.5.
Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured.

V Source code address

Github.com/toutouge/ja…

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Intellij Idea Project builds multiple modules under SpringBoot

V Design database

V is the introduction of mybatis

V write controller

V writing service

V Configuration Settings

Vlinux deployment springboot

V Source code address

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