SpringBoot与Mybatis,逆向工程。

本文为实践SpringBoot、MyBatis、逆向工程:利用idea集成springboot快速启动项,快速生产一个springboot项目。快速启动勾选Lombok、Spring Web、MyBatis Framework、MySQL Driver。

最终结果的相关说明如下:

1、项目代码目录结构

 

 

 2、Maven项目中pom.xml依赖如下:

<?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>2.1.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.it</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <mybatis-generator-maven-plugin.version>1.3.2</mybatis-generator-maven-plugin.version>
        <mysql-connector-java.version>8.0.13</mysql-connector-java.version>
        <mybatis-generator-core.version>1.3.2</mybatis-generator-core.version>
        <mybatis-typehandlers-jsr310>1.0.2</mybatis-typehandlers-jsr310>
        <lombok.version>1.18.2</lombok.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency
        >
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.3</version>
        </dependency>
        <!--Mysql-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <!--Mybatis 逆向工程-->
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>${mybatis-generator-core.version}</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-typehandlers-jsr310</artifactId>
            <version>${mybatis-typehandlers-jsr310}</version>
        </dependency>
        <!--lombok-->
        <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>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.mybatis.generator</groupId>
                    <artifactId>mybatis-generator-maven-plugin</artifactId>
                    <version>${mybatis-generator-maven-plugin.version}</version>
                    <executions>
                        <execution>
                            <id>Generate MyBatis Artifacts</id>
                            <goals>
                                <goal>generate</goal>
                            </goals>
                        </execution>
                    </executions>
                    <configuration>
                        <configurationFile>src/main/resources/generatorConfig.xml</configurationFile>
                        <verbose>true</verbose>
                        <overwrite>true</overwrite>
                    </configuration>
                    <dependencies>
                        <dependency>
                            <groupId>mysql</groupId>
                            <artifactId>mysql-connector-java</artifactId>
                            <version>${mysql-connector-java.version}</version>
                        </dependency>
                    </dependencies>
                </plugin>

                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <configuration>
                        <source>${java.version}</source>
                        <target>${java.version}</target>
                        <encoding>UTF-8</encoding>
                        <annotationProcessorPaths>
                            <path>
                                <groupId>org.projectlombok</groupId>
                                <artifactId>lombok</artifactId>
                                <version>${lombok.version}</version>
                            </path>
                        </annotationProcessorPaths>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-maven-plugin</artifactId>
                    <configuration>
                        <!-- 指定该Main Class为全局的唯一入口 -->
                        <mainClass>FmemsApplication</mainClass>
                        <fork>true</fork>
                    </configuration>
                </plugin>
            </plugins>
        </pluginManagement>

        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <fork>true</fork>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

3、配置文件application.yml。说明:mysql-connector-java引入的版本是高版本(8.0.13),需要加入时区“?serverTimezone=GMT",如果是”5“版本就不需要。

server:
  port: 8090

spring:
  datasource:
    username: root
    password: ******
    url: jdbc:mysql://localhost:3306/mybatis?serverTimezone=GMT
    driver-class-name: com.mysql.cj.jdbc.Driver

mybatis:
  mapper-locations: classpath:mapper/*.xml
  type-aliases-package: com.it.demo.domain.Empt
  configuration:
    map-underscore-to-camel-case: true

4、generatorConfig.xml内容:

<?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>

    <!-- context 运行上下文 -->
    <!-- id 必唯一 -->
    <!-- defaultModelType:可选;flat:所有内容(主键,blob)等全部生成在一个对象中 -->
    <!-- targetRuntime:可选 ;建议:MyBatis3Simple/MyBatis3 -->
    <context id="MySqlTables" defaultModelType="flat"
             targetRuntime="MyBatis3">

        <!--beginningDelimiter和endingDelimiter:指明数据库的用于标记数据库对象名的符号 -->
        <!--如ORACLE就是双引号;MYSQL默认是`反引号; -->
        <property name="beginningDelimiter" value="`" />
        <property name="endingDelimiter" value="`" />

        <!-- 指定生成的java文件的编码,没有直接生成到项目时中文可能会乱码 -->
        <property name="javaFileEncoding" value="UTF-8" />

        <!-- 格式化java代码 -->
        <property name="javaFormatter"
                  value="org.mybatis.generator.api.dom.DefaultJavaFormatter" />

        <!-- 格式化XML代码 -->
        <property name="xmlFormatter"
                  value="org.mybatis.generator.api.dom.DefaultXmlFormatter" />

        <!--自动实现Serializable接口 -->
        <plugin type="org.mybatis.generator.plugins.SerializablePlugin" />

        <!--去除生成的注释;建议初次不去注释 -->
        <commentGenerator>
            <!-- 去除自动生成时的时间戳 -->
            <property name="suppressDate" value="true" />
            <!-- 去除自动生成的注释 -->
            <property name="suppressAllComments" value="true" />
        </commentGenerator>

        <!--数据库基本信息 -->
        <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/mybatis?serverTimezone=GMT" userId="root"
                        password="123456">
        </jdbcConnection>

        <!-- java类型处理器 用于处理DB中的类型到Java中的类型,默认使用JavaTypeResolverDefaultImpl; -->
        <!-- 注意一点,默认会先尝试使用Integer,Long,Short等来对应DECIMAL和 NUMERIC数据类型; -->
        <javaTypeResolver
                type="org.mybatis.generator.internal.types.JavaTypeResolverDefaultImpl">
            <!-- true:使用BigDecimal对应DECIMAL和 NUMERIC数据类型 -->
            <!--false:默认, -->
            <!--scale>0;length>18:使用BigDecimal -->
            <!--scale=0;length[10,18]:使用Long -->
            <!--scale=0;length[5,9]:使用Integer -->
            <!--scale=0;length<5:使用Short -->
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>

        <!--Java model(POJO)生成的位置 -->
        <!--targetPackage:包路径 -->
        <!--targetProject:项目路径 -->
        <javaModelGenerator targetPackage="com.it.demo.domain.generator"
                            targetProject="src/main/java">
            <!-- enableSubPackages:是否让schema作为包的后缀 -->
            <property name="enableSubPackages" value="true" />
            <!-- 从数据库返回的值被清理前后的空格 -->
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

        <!--*Mapper.xml生成的位置 -->
        <sqlMapGenerator targetPackage="mapper.generator"
                         targetProject="src/main/resources">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>

        <!-- 对于mybatis来说,即生成Mapper接口,注意,如果没有配置该元素,那么默认不会生成Mapper接口 -->
        <!--type:选择怎么生成mapper接口(在MyBatis3/MyBatis3Simple下) -->
        <!--1,ANNOTATEDMAPPER:会生成使用Mapper接口+Annotation的方式创建(SQL生成在annotation中),不会生成对应的XML -->
        <!--2,MIXEDMAPPER:使用混合配置,会生成Mapper接口,并适当添加合适的Annotation,但是XML会生成在XML中 -->
        <!--3,XMLMAPPER:会生成Mapper接口,接口完全依赖XML -->
        <!--注意,如果context是MyBatis3Simple:只支持ANNOTATEDMAPPER和XMLMAPPER -->
        <javaClientGenerator type="XMLMAPPER"
                             targetPackage="com.it.demo.dao.generator" targetProject="src/main/java">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>

        <!--表的名称;对应类的名称; -->
        <table tableName="tbl_employee" domainObjectName="Employee"></table>
        <table tableName="tbl_empt" domainObjectName="Department"></table>

    </context>
</generatorConfiguration>

最后:如果要自动生产domain、xxxMapper.java、xxxMapper.xml。需要Run--->Run Configurations-->Maven 的Command Line 添加”mybatis-generator:generate” (mybatis-generator:generate -e 加了-e能输出详细)“。

 

 

运行后控制台输出如下:

 

 效果如图:

 

 

 

 

posted on 2020-08-16 14:42  betterLearing  阅读(629)  评论(0编辑  收藏  举报